Texas Instruments TLC320AC01CPMR, TLC320AC01CPM, TLC320AC01CFN, TLC320AC01CFNR, TLC320AC01CDW Datasheet

TLC320AC01C

Data Manual

Single-Supply Analog Interface Circuit

SLAS057D

October 1996

Printed on Recycled Paper

IMPORTANT NOTICE

T exas Instruments (TI) reserves the right to make changes to its products or to discontinue any
semiconductor product or service without notice, and advises its customers to obtain the latest
version of relevant information to verify, before placing orders, that the information being relied
on is current.

TI warrants performance of its semiconductor products and related software to the specifications
applicable at the time of sale in accordance with TI’s standard warranty . T esting and other quality
control techniques are utilized to the extent TI deems necessary to support this warranty.
Specific testing of all parameters of each device is not necessarily performed, except those
mandated by government requirements.

Certain applications using semiconductor products may involve potential risks of death,
personal injury, or severe property or environmental damage (“Critical Applications”).

TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES
OR SYSTEMS OR OTHER CRITICAL APPLICATIONS.

Inclusion of TI products in such applications is understood to be fully at the risk of the customer.
Use of TI products in such applications requires the written approval of an appropriate TI officer.
Questions concerning potential risk applications should be directed to TI through a local SC
sales office.

In order to minimize risks associated with the customer’s applications, adequate design and
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TI assumes no liability for applications assistance, customer product design, software
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Copyright  1996, Texas Instruments Incorporated

iii

Contents

Section Title Page

1 Introduction 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 Features 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Functional Block Diagram 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 Terminal Assignments 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 Terminal Functions 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5 Register Functional Summary 1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Detailed Description 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 Definitions and Terminology 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 Reset and Power-Down Functions 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.1 Reset 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.2 Conditions of Reset 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.3 Software and Hardware Power-Down 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.4 Register Default Values After POR,
Software Reset, or RESET

Is Applied 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 Master-Slave Terminal Function 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4 ADC Signal Channel 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5 DAC Signal Channel 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.6 Serial Interface 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.7 Number of Slaves 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.8 Required Minimum Number of MCLK Periods 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . .

2.8.1 TLC320AC01 AIC Master-Slave Summary 2–6. . . . . . . . . . . . . . . . . . . . . . . .

2.8.2 Notes on TLC320AC01/02 AIC Master-Slave Operation 2–7. . . . . . . . . . . . .

2.9 Operating Frequencies 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.9.1 Master and Stand-Alone Operating Frequencies 2–9. . . . . . . . . . . . . . . . . . .

2.9.2 Slave and Codec Operating Frequencies 2–9. . . . . . . . . . . . . . . . . . . . . . . . .

2.10 Switched-Capacitor Filter Frequency (FCLK) 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 1 Filter Bandwidths 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.12 Master and Stand-Alone Modes 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.12.1 Register Programming 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.12.2 Master and Stand-Alone Functional Sequence 2–10. . . . . . . . . . . . . . . . . . . . .

2.13 Slave and Codec Modes 2–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.13.1 Slave and Codec Functional Sequence 2–11. . . . . . . . . . . . . . . . . . . . . . . . . . .

2.13.2 Slave Register Programming 2–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.14 Terminal Functions 2–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.14.1 Frame-Sync Function 2–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.14.2 Data Out (DOUT) 2–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.14.3 Data In (DIN) 2–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.14.4 Hardware Program Terminals (FC1 and FC0) 2–12. . . . . . . . . . . . . . . . . . . . . .

2.14.5 Midpoint Voltages (ADC V

MID

and DAC V

MID

) 2–13. . . . . . . . . . . . . . . . . . . . .

2.15 Device Functions 2–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.15.1 Phase Adjustment 2–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.15.2 Analog Loopback 2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iv

Contents (Continued)

Section Title Page

2.15.3 16-Bit Mode 2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.15.4 Free-Run Mode 2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.15.5 Force Secondary Communication 2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.15.6 Enable Analog Input Summing 2–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.15.7 DAC Channel (sin x)/x Error Correction 2–15. . . . . . . . . . . . . . . . . . . . . . . . . . .

2.16 Serial Communications 2–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.16.1 Stand-Alone and Master-Mode Word Sequence and
Information Content During Primary and

Secondary Communications 2–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.16.2 Slave and Codec-Mode Word Sequence and
Information Content During Primary and

Secondary Communications 2–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.17 Request for Secondary Serial Communication and Phase Shift 2–17. . . . . . . . . . . .

2.17.1 Initiating a Request 2–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.17.2 Normal Combinations of Control 2–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.17.3 Additional Control Options 2–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.18 Primary Serial Communications 2–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.18.1 Primary Serial Communications Data Format 2–19. . . . . . . . . . . . . . . . . . . . . .

2.18.2 Data Format From DOUT During

Primary Serial Communications 2–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.19 Secondary Serial Communications 2–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.19.1 Data Format to DIN During Secondary Serial Communications 2–19. . . . . . .

2.19.2 Control Data-Bit Function in Secondary Serial Communication 2–19. . . . . . .

2.20 Internal Register Format 2–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.20.1 Pseudo-Register 0 (No-Op Address) 2–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.20.2 Register 1 (A Register) 2–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.20.3 Register 2 (B Register) 2–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.20.4 Register 3 (A′ Register) 2–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.20.5 Register 4 (Amplifier Gain-Select Register) 2–22. . . . . . . . . . . . . . . . . . . . . . . .

2.20.6 Register 5 (Analog Configuration Register) 2–22. . . . . . . . . . . . . . . . . . . . . . . .

2.20.7 Register 6 (Digital Configuration Register) 2–23. . . . . . . . . . . . . . . . . . . . . . . . .

2.20.8 Register 7 (Frame-Sync Delay Register) 2–23. . . . . . . . . . . . . . . . . . . . . . . . . .

2.20.9 Register 8 (Frame-Sync Number Register) 2–24. . . . . . . . . . . . . . . . . . . . . . . .

3 Specifications 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 Absolute Maximum Ratings Over Operating

Free-Air Temperature Range 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 Recommended Operating Conditions 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 Electrical Characteristics Over Recommended Range of Operating
Free-Air Temperature, MCLK = 5.184 MHz, V

DD

= 5 V, Outputs

Unloaded, Total Device 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 Electrical Characteristics Over Recommended Range of Operating
Free-Air Temperature, V

DD

= 5 V, Digital I/O Terminals (DIN, DOUT, EOC,

FC0, FC1, FS

, FSD, MCLK, M/S, SCLK) 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

v

Contents (Continued)

Section Title Page

3.5 Electrical Characteristics Over Recommended Range of Operating
Free-Air Temperature, V

DD

= 5 V, ADC and DAC Channels 3–2. . . . . . . . . . . . . . .

3.5.1 ADC Channel Filter Transfer Function,

FCLK = 144 kHz, f

s

= 8 kHz 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.2 ADC Channel Input, V

DD

= 5 V,

Input Amplifier Gain = 0 dB 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.3 ADC Channel Signal-to-Distortion Ratio,

V

DD

= 5 V, fs = 8 kHz 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.4 DAC Channel Filter Transfer Function,

FCLK = 144 kHz, f

s

= 9.6 kHz, VDD = 5 V 3–3. . . . . . . . . . . . . . . . . . . . . . . . .

3.5.5 DAC Channel Signal-to-Distortion Ratio,

V

DD

= 5 V, fs = 8 kHz 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.6 System Distortion, V

DD

= 5 V, fs = 8 kHz,

FCLK = 144 kHz 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.7 Noise, Low-Pass and Band-Pass Switched-

Capacitor Filters Included, V

DD

= 5 V 3–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.8 Absolute Gain Error, V

DD

= 5 V, fs = 8 kHz 3–5. . . . . . . . . . . . . . . . . . . . . . .

3.5.9 Relative Gain and Dynamic Range, V

DD

= 5 V, fs = 8 kHz 3–5. . . . . . . . . . .

3.5.10 Power-Supply Rejection, V

DD

= 5 V 3–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.11 Crosstalk Attenuation, V

DD

= 5 V 3–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.12 Monitor Output Characteristics, V

DD

= 5 V 3–7. . . . . . . . . . . . . . . . . . . . . . . .

3.6 Timing Requirements and Specifications in Master Mode 3–8. . . . . . . . . . . . . . . . .

3.6.1 Recommended Input Timing Requirements for

Master Mode, V

DD

= 5 V 3–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.6.2 Operating Characteristics Over Recommended Range of

Operating Free-Air Temperature, V

DD

= 5 V 3–8. . . . . . . . . . . . . . . . . . . . . . .

3.7 Timing Requirements and Specifications in Slave Mode and

Codec Emulation Mode 3–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.7.1 Recommended Input Timing Requirements for

Slave Mode, V

DD

= 5 V 3–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.7.2 Operating Characteristics Over Recommended Range of Operating

Free-Air Temperature, V

DD

= 5 V 3–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Parameter Measurement Information 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 T ypical Characteristics 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 Application Information 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendix A Primary Control Bits A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendix B Secondary Communications B–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendix C TLC320AC01C/TLC320AC02C Specification Comparisons C–1. . . . . . .

Appendix D Multiple TLC320AC01/TLC320AC02 Analog Interface Circuits

on One TMS320C5X DSP Serial Port D–1. . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendix E Mechanical Data E–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

vi

List of Illustrations

Figure Title Page

1–1 Control Flow Diagram 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–1 Functional Sequence for Primary and Secondary Communication 2–5. . . . . . . . . . .

2–2 Timing Sequence 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–3 Master and Stand-Alone Functional Sequence 2–16. . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–4 Slave and Codec Functional Sequence 2–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–1 IN+ and IN– Gain-Control Circuitry 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–2 AIC Stand-Alone and Master-Mode Timing 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–3 AIC Slave and Codec Emulation Mode 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–4 Master or Stand-Alone FS

and FSD Timing 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–5 Slave FS

to FSD Timing 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–6 Slave SCLK to FSD

Timing 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–7 DOUT Enable Timing From Hi-Z 4–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–8 DOUT Delay Timing to Hi-Z 4–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–9 EOC Frame Timing 4–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–10 Master-Slave Frame-Sync Timing After a Delay Has Been

Programmed Into the FSD Registers 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–11 Master and Slave Frame-Sync Sequence with One Slave 4–5. . . . . . . . . . . . . . . . . .

6–1 Stand-Alone Mode (to DSP Interface) 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–2 Codec Mode (to DSP Interface) 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–3 Master With Slave (to DSP Interface) 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–4 Single-Ended Input (Ground Referenced) 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–5 Single-Ended to Differential Input (Ground Referenced) 6–3. . . . . . . . . . . . . . . . . . . .

6–6 Differential Load 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–7 Differential Output Drive (Ground Referenced) 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–8 Low-Impedance Output Drive 6–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–9 Single-Ended Output Drive (Ground Referenced) 6–4. . . . . . . . . . . . . . . . . . . . . . . . .

List of Tables

Table Title Page

1–1 Operating Frequencies 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–1 Master-Slave Selection 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–2 Sampling Variation With A′ 2–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–3 Software and Hardware Requests for Secondary Serial-Communication and

Phase-Shift Truth Table 2–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–1 Gain Control (Analog Input Signal Required for

Full-Scale Bipolar A/D-Conversion 2s Complement) 4–1. . . . . . . . . . . . . . . . . . . . . . .

1–1

1 Introduction

The TLC320AC01† analog interface circuit (AIC) is an audio-band processor that provides an
analog-to-digital and digital-to-analog input/output interface system on a single monolithic CMOS chip. This
device integrates a band-pass switched-capacitor antialiasing input filter, a 14-bit-resolution
analog-to-digital converter (ADC), a 14-bit-resolution digital-to-analog converter (DAC), a low-pass
switched-capacitor output-reconstruction filter, (sin x)/x compensation, and a serial port for data and control
transfers.

The internal circuit configuration and performance parameters are determined by reading control
information into the eight available data registers. The register data sets up the device for a given mode of
operation and application.

The major functions of the TLC320AC01 are:

1. To convert audio-signal data to digital format by the ADC channel

2. To provide the interface and control logic to transfer data between its serial input and output
terminals and a digital signal processor (DSP) or microprocessor

3. To convert received digital data back to an audio signal through the DAC channel

The antialiasing input low-pass filter is a switched-capacitor filter with a sixth-order elliptic characteristic. The
high-pass filter is a single-pole filter to preserve low-frequency response as the low-pass filter cutoff is
adjusted. There is a three-pole continuous-time filter that precedes this filter to eliminate any aliasing caused
by the filter clock signal.

The output-reconstruction switched-capacitor filter is a sixth-order elliptic transitional low-pass filter followed
by a second-order (sin x)/x correction filter. This filter is followed by a three-pole continuous-time filter to
eliminate images of the filter clock signal.

The TLC320AC01 consists of two signal-processing channels, an ADC channel and a DAC channel, and
the associated digital control. The two channels operate synchronously; data reception at the DAC channel
and data transmission from the ADC channel occur during the same time interval. The data transfer is in
2s-complement format.

There are three basic modes of operation available: the stand-alone analog-interface mode, the
master-slave mode, and the linear-codec mode. In the stand-alone mode, the TLC320AC01 generates the
shift clock and frame synchronization for the data transfers and is the only AIC used. The master-slave mode
has one TLC320AC01 as the master that generates the master-shift clock and frame synchronization; the
remaining AICs are slaves to these signals. In the linear-codec mode, the shift clock and the frame­synchronization signals are externally generated and the timing can be any of the standard codec-timing
patterns.

Typical applications for this device include modems, speech processing, analog interface for DSPs,
industrial-process control, acoustical-signal processing, spectral analysis, data acquisition, and
instrumentation recorders.

The TLC320AC01C is characterized for operation from 0°C to 70°C.

†

The TLC320AC01 is functionally equivalent to the TLC320AC02 and differs in the electrical specifications as shown
in Appendix C.

1–2

1.1 Features

• General-Purpose Signal-Processing Analog Front End (AFE)

• Single 5-V Power Supply

• Power Dissipation . . . 100 mW Typ

• Signal-to-Distortion Ratio . . . 70 dB Typ

• Programmable Filter Bandwidths (Up to 10.8 kHz) and Synchronous ADC and DAC Sampling

• Serial-Port Interface

• Monitor Output With Programmable Gains of 0 dB, –8 dB, –18 dB, and Squelch

• Two Sets of Differential Inputs With Programmable Gains of 0 dB, 6 dB, 12 dB, and Squelch

• Differential or Single-Ended Analog Output With Programmable Gains of 0 dB, –6 dB, –12 dB,

and Squelch

• Differential Outputs Drive 3-V Peak Into a 600-

Ω Differential Load

• Differential Architecture Throughout

• 1-

µm Advanced LinEPIC Process

• 14-Bit Dynamic-Range ADC and DAC

• 2s-Complement Data Format

• Application Report Available

†

†

Designing with the TLC320AC01 Analog Interface for DSPs (SLAA006)

LinEPIC is a trademark of Texas Instruments Incorporated.

1–3

1.2 Functional Block Diagram

DAC Channel

OUT–

OUT+

AUX IN–

AUX IN+

IN–

IN+

DAC

EOC

FSD

DIN

SCLK

MCL

K

DOUT

FS

RESETADC

V

MID

DGTL

GND

DAC
V

DD

PWR
DWN

Correction

(sin x)/x

Port

Serial

Reference

Voltage

Internal

ADC

ADC Channel

M

U
X

X

U

M

Filter

26
25
28
27

3
4

11
12

14
13

10
17
19

25 923 8

Filter

M/S

15
16

18

FC0
FC1

DAC
GND

720

DGTL

V

DD

ADC
V

DD

24

ADC
GND

22

SUBS21DAC

V

MID

6

1

MON OUT

Terminal numbers shown are for the FN package.

1.3 Terminal Assignments

321

13 14

5
6
7
8

9
10
11

IN–
ADC V

DD

ADC V

MID

ADC GND
SUBS
DGTL GND
EOC

DAC V

DD

DAC V

MID

DAC GND

RESET

DGTL V

DD

DIN

DOUT

4

15 16 17 18

SCLK

MCLK

FC0

FC1

FSD

M/S

OUT –

OUT +

PWR DWN

MON OUT

FN PACKAGE

(TOP VIEW)

28 27 26

25
24
23
22
21
20
19

12

FS

AUX IN +

AUX IN –

IN +

1–4

1.3 Terminal Assignments (Continued)

18 19

NC
NC
OUT–
NC
NC
OUT+
PWR

DWN
NC
MON OUT
NC
AUXIN+
AUXIN–
IN+
IN–
NC
NC

48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33

20

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

DIN

NC

DOUT

FS
NC
NC
NC

SCLK

NC

MCLK

FC0
FC1

NC

FSD

NC

M/S

21 22 23 24

PM PACKAGE

(TOP VIEW)

NC

DAC GND

63 62 61 60 5964 58

NCNCNC

DGTL VNCRESET

NC

NC

ADC GND

NC

NC

NC

NC

NC

DGTL GND

NC

SUBS

NC

56 55 5457

25 26 27 28 29

53 52

17

EOC

NC

NC

51 50 49

30 31 32

MID

NC

DAC VNCDAC V

NC – No internal connection

NC

NC

NC

DD

MID

DD

ADC V

DD

ADC V

1–5

1.4 Terminal Functions

TERMINAL

NAME NO.†NO.

‡

I/O

DESCRIPTION

ADC V

DD

24 32 I Analog supply voltage for the ADC channel

ADC V

MID

23 30 O Midsupply for the ADC channel (requires a bypass capacitor). ADC V

MID

must be

buffered when used as an external reference.
ADC GND 22 27 I Analog ground for the ADC channel
AUX IN+ 28 38 I Noninverting input to auxiliary analog input amplifier
AUX IN– 27 37 I Inverting input to auxiliary analog input amplifier
DAC V

DD

5 49 I Analog supply voltage for the DAC channel

DAC V

MID

6 51 O Midsupply for the DAC channel (requires a bypass capacitor). DAC V

MID

must be

buffered when used as an external reference.
DAC GND 7 54 I Analog ground for the DAC channel
DIN 10 1 I Data input. DIN receives the DAC input data and command information and is

synchronized with SCLK.
DOUT 11 3 O Data output. DOUT outputs the ADC data results and register read contents.

DOUT is synchronized with SCLK.
DGTL V

DD

9 59 I Digital supply voltage for control logic
DGTL GND 20 22 I Digital ground for control logic
EOC 19 17 O End-of-conversion output. EOC goes high at the start of the ADC conversion

period and low when conversion is complete. EOC remains low until the next ADC
conversion period begins and indicates the internal device conversion period.

FC0 15 11 I Hardware control input. FC0 is used in conjunction with FC1 to request secondary

communication and phase adjustments. FC0 should be tied low if it is not used.

FC1 16 12 I Hardware control input. FC1 is used in conjunction with FC0 to request secondary

communication and phase adjustments. FC1 should be tied low if it is not used.

FS 12 4 I/O Frame synchronization. When FS goes low, DIN begins receiving data bits and

DOUT begins transmitting data bits. In master mode, FS

is low during the

simultaneous 16-bit transmission to DIN and from DOUT. In slave mode, FS

is
externally generated and must be low for one shift-clock period minimum to initiate
the data transfer.

FSD 17 14 O Frame-synchronization delayed output. This active-low output synchronizes a

slave device to the frame synchronization timing of the master device. FSD

is
applied to the slave FS

input and is the same duration as the master FS signal but

delayed in time by the number of shift clocks programmed in the FSD

register.
IN+ 26 36 I Noninverting input to analog input amplifier
IN– 25 35 I Inverting input to analog input amplifier
MCLK 14 10 I The master-clock input drives all the key logic signals of the AIC.
MON OUT 1 40 O The monitor output allows monitoring of analog input and is a high-impedance

output.

M/S 18 16 I Master/slave select input. When M/S is high, the device is the master and when

low, it is a slave.

†

Terminal numbers shown are for the FN package.

‡

Terminal numbers shown are for the PM package.

1–6

1.4 Terminal Functions (Continued)

TERMINAL

NAME NO.†NO.

‡

I/O

DESCRIPTION

OUT+ 3 43 O Noninverting output of analog output power amplifier. OUT+ can drive transformer

hybrids or high-impedance loads directly in a differential connection or a
single-ended configuration with a buffered V

MID

.

OUT– 4 46 O Inverting output of analog output power amplifier. OUT– is functionally identical

with and complementary to OUT+.

PWR DWN 2 42 I Power-down input. When PWR DWN is taken low, the device is powered down

such that the existing internally programmed state is maintained. When PWR
DWN is brought high, full operation resumes.

RESET 8 57 I Reset input that initializes the internal counters and control registers. RESET

initiates the serial data communications, initializes all of the registers to their
default values, and puts the device in a preprogrammed state. After a low-going
pulse on RESET

, the device registers are initialized to provide a 16-kHz
data-conversion rate and 7.2-kHz filter bandwidth for a 10.368-MHz master clock
input signal.

SCLK 13 8 I/O Shift clock. SCLK clocks the digital data into DIN and out of DOUT during the

frame-synchronization interval. When configured as an output (M/S

high), SCLK
is generated internally by dividing the master clock signal frequency by four. When
configured as an input (M/S

low), SCLK is generated externally and
synchronously to the master clock. This signal clocks the serial data into and out
of the device.

SUBS 21 24 I Substrate connection. SUBS should be tied to ADC GND.

†

Terminal numbers shown are for the FN package.

‡

Terminal numbers shown are for the PM package.

1–7

A Register

(8 bits)

Divide by 2

576 kHz

B Register

(8 bits)

Divide by 4

1.296 MHz

2.592 MHz

5.184 MHz

10.368 MHz

MCLK

Processor

SCLK

A Register + A′ Register

(8 bits)

2s Complement

Program Divide

A Counter

(8 bits)

B Counter

288 kHz

FCLK [low-pass filter and

(sin x)/x filter clock]

Conversion

Rate

Single, A-Counter

Period

One-Shot

Phase ShiftNormal

Control

Figure 1–1. Control Flow Diagram

Table 1–1. Operating Frequencies

FCLK

(kHz)

LOW-PASS FILTER

BANDWIDTH

(kHz)

B REGISTER CONTENTS

(Program No. of Filter Clocks)

(Decimal)

CONVERSION

RATE

(kHz)

HIGH-PASS

POLE FREQUENCY

(Hz)

144 3.6 20 (see Note 1)

18
15
10 (see Note 2)

7.2
8

9.6

14.4

36
40
48
72

288 7.2 20 (see Note 1)

18
15
10 (see Notes 2 and 3)

14.4
16

19.2

28.8

72
80
96

144

432 10.8 20 (see Note 1)

18
15 (see Note 3)
10 (see Notes 2 and 3)

21.6
24

28.8

43.2

108
120
144
216

NOTES: 1. The B register can be programmed for values greater than 20; however, since the sample rate is lower than

7.2 kHz and the internal filter remains at 3.6 kHz, an external antialiasing filter is required.

2. When the B register is programmed for a value less than 10, the ADC and the DAC conversions are not
completed before the next frame-sync signal and the results are in error.

3. The maximum sampling rate for the ADC channel is 43.2 kHz. The maximum rate for the DAC channel is
25 kHz.

1–8

1.5 Register Functional Summary

There are nine data registers that are used as follows:
Register 0 The No-op register. The 0 address allows phase adjustments to be made without

reprogramming a data register.
Register 1 The A register controls the count of the A counter.
Register 2 The B register controls the count of the B counter.
Register 3 The A

′ register controls the phase adjustment of the sampling period. The adjustment is

equal to the register value multiplied by the input master period.
Register 4 The amplifier gain register controls the gains of the input, output, and monitor amplifiers.
Register 5 The analog configuration register controls:

• The addition/deletion of the high-pass filter to the ADC signal path

• The enable/disable of the analog loopback

• The selection of the regular inputs or auxiliary inputs

• The function that allows processing of signals that are the sum of the regular inputs and

the auxiliary inputs (V

IN

+ V

AUX IN

)

Register 6 The digital configuration register controls:

• Selection of the free-run function

• FSD

[frame-synchronization (sync) delay] output enable/disable

• Selection of 16-bit function

• Forcing secondary communications

• Software reset

• Software power down

Register 7 The frame-sync delay register controls the time delay between the master-device frame

sync and slave-device frame sync. Register 7 must be the last register programmed when

using slave devices since all register data is latched and valid on the sixteenth falling edge

of SCLK. On the sixteenth falling edge of SCLK, all delayed frame-sync intervals are shifted

by this programmed amount.
Register 8 The frame-sync number register informs the master device of the number of slaves that are

connected in the chain. The frame-sync number is equal to the number of slaves plus one.

2–1

2 Detailed Description

2.1 Definitions and Terminology

ADC Channel All signal processing circuits between the analog input and the digital conversion

results at DOUT

Codec Mode The operating mode under which the device receives shift clock and frame-sync

signals from a host processor. The device has no slaves.

d The d represents valid programmed or default data in the control register format

(see Section 2.19) when discussing other data-bit portions of the register.
Dxx Bit position in the primary data word (xx is the bit number)
DAC Channel All signal processing circuits between the digital data word applied to DIN and the

differential output analog signal available at OUT+ and OUT–
Data Transfer Interval The time during which data is transferred from DOUT and to DIN. This interval is 16

shift clocks regardless of whether the shift clock is internally or externally generated.

The data transfer is initiated by the falling edge of the frame-sync signal.
DSxx Bit position in the secondary data word (xx is the bit number)
FCLK An internal clock frequency that is a division of MCLK that controls the low-pass filter

and (sinx)/x filter clock (see Figure 1–1 and Table 1-1).
f

i

The analog input frequency of interest
Frame Sync The falling edge of the signal that initiates the data-transfer interval. The primary

frame sync starts the primary communications, and the secondary frame sync starts

the secondary communications.
Frame Sync and The time between falling edges of successive primary frame-sync signals

Sampling Period
Frame-Sync Interval The time period occupied by 16 shift clocks. Regardless of the mode of operation,

there is always an internal frame-sync interval signal that goes low on the rising

edge of SCLK and remains low for 16 shift clocks. It is used for synchronization of

the serial-port internal signals. It goes high on the seventeenth rising edge of SCLK.
f

s

The sampling frequency that is the reciprocal of the sampling period.
Host Any processing system that interfaces to DIN, DOUT, SCLK, or FS

.

Master Mode The operating mode under which the device generates and uses its own shift clock

and frame-sync signal and generates all delayed frame-sync signals necessary to

support slave devices.
Phase Adjustment The programmed time variation from the falling edge of one frame-sync signal to the

falling edge of the next frame sync signal. The time variation is determined by the

contents of the A

′ register. Since the time between falling edges of successive

frame-sync signals is the the sampling period, the sampling period is adjusted.
Primary (Serial) The digital data-transfer interval. Since the device is synchronous, the signal data

Communications words from the ADC channel and to the DAC channel occur simultaneously.
Secondary (Serial) The digital control and configuration data-transfer interval into DIN and the register

Communications read-data cycle from DOUT. The data-transfer interval occurs when requested by

hardware or software.
Signal Data The input signal and all of the converted representations through the ADC channel

and return through the DAC channel to the analog output. This is contrasted with

the purely digital software-control data.
Slave Mode The operating mode under which the device receives shift clock and frame-sync

signals from a master device.

2–2

Stand-Alone Mode The operating mode under which the device generates and uses its own shift clock

and frame-sync signal. The device has no slave devices.
X The X represents a don’t-care bit position within the control register format.

2.2 Reset and Power-Down Functions

2.2.1 Reset

The TLC320AC01 resets both the internal counters and registers, including the programmed registers, by
any of the following:

• Applying power to the device, causing a power-on reset (POR)

• Applying a low reset pulse to RESET

• Reading in the programmable software reset bit (DS01 in register 6)

PWR

DWN resets the counters only and preserves the programmed register contents.

2.2.2 Conditions of Reset

The two internal reset signals used for the reset and synchronization functions are as follows:

1. Counter reset: This signal resets all flip-flops and latches that are not externally programmed with
the exception of those generating the reset pulse itself. In addition, this signal resets the software
power-down bit.

Counter reset = power-on reset + RESET

+ RESET bit + PWR DWN

2. Register reset: This signal resets all flip-flops and latches that are not reset by the counter reset
except those generating the reset pulse itself.

Register reset = power-on reset + RESET

+ RESET bit

Both reset signals are at least one master-clock period long and release on the falling edge of the master
clock.

2.2.3 Software and Hardware Power-Down

Given the definitions and conditions of RESET , the software-programmed power-down condition is cleared
by resetting the software bit (DS00 in register 6) to zero. It is also cleared by either cycling the power to the
device, bringing PWR

DWN low, or bringing RESET low.

PWR

DWN powers down the entire chip ( < 1 mA ). The software-programmable power-down bit only
powers down the analog section of the chip ( < 3 mA ), which allows a software power-up function. Cycling
PWR

DWN high to low and back to high resets all flip-flops and latches that are not externally programmed,
thereby preserving the register contents.

When PWR

DWN is not used, it should be tied high.

2.2.4 Register Default Values After POR, Software Reset, or RESET Is Applied

Register 1 – The A Register
The default value of the A-register data is decimal 18 as shown below.

DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

0 0 0 1 0 0 1 0

2–3

Register 2 – The B Register
The default value of the B-register data is decimal 18 as shown below.

DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

0 0 0 1 0 0 1 0

Register 3 – The A′ Register
The default value of the A

′-register data is decimal 0 as shown below.

DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

0 0 0 0 0 0 0 0

Register 4 – The Amplifier Gain-Select Register
The default value of the amplifier gain-select register data is shown below.

DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

0 0 0 0 0 1 0 1

Register 5 – The Analog Control-Configuration Register
The power-up and reset conditions are as shown below. In the read mode, 8 bits are read but the 4 LSBs

are repeated as the 4 MSBs.

DS03 DS02 DS01 DS00

0 0 0 1

Register 6 – The Digital Configuration Register
The default value of DS07 – DS00 is 0 as shown below.

DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

0 0 0 0 0 0 0 0

Register 7 – The Frame-Sync Delay Register
The default value of DS07 – DS00 is 0 as shown below.

DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

0 0 0 0 0 0 0 0

Register 8 – The Frame-Sync Number Register
The default value of DS07 – DS00 is 1 as shown below.

DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

0 0 0 0 0 0 0 1

2–4

2.3 Master-Slave Terminal Function

Table 2–1 describes the function of the master/slave (M/S) input. The only difference between master and
slave operations in the TLC320AC01 is that SCLK and FS

are outputs when M/S is high and inputs when

M/S

is low.

Table 2–1. Master-Slave Selection

MODE M/S

†

FS SCLK

Master and Stand Alone H Output Output
Slave and Codec Emulation L Input Input

†

When the stand-alone mode is desired or when the device is
permanently in the master mode, M/S

must be high.

2.4 ADC Signal Channel

To produce excellent common-mode rejection of unwanted signals, the analog signal is processed
differentially until it is converted to digital data. The signal is amplified by the input amplifier at one of three
software-selectable gains (typically 0 dB, 6 dB, or 12 dB). A squelch mode can also be programmed for the
input amplifier.

The amplifier output is filtered and applied to the ADC input. The ADC converts the signal into discrete digital
words in 2s-complement format corresponding to the analog-signal value at the sampling time. These 16-bit
digital words, representing sampled values of the analog input signal, are clocked out of the serial port
(DOUT), one word for each primary communication interval. During secondary communications, the data
previously programmed into the registers can be read out with the appropriate register address and with the
read bit set to 1. When a register read is not requested, all 16 bits are 0.

2.5 DAC Signal Channel

DIN receives the 16-bit serial data word (2s complement) from the host during the primary communications
interval and latches the data on the seventeenth rising edge of SCLK. The data are converted to an analog
voltage by the DAC with a sample and hold and then through a (sin x)/x correction circuit and a smoothing
filter. An output buffer with three software-programmable gains (0 dB, –6 dB, and –12 dB), as shown in
register 4, drives the differential outputs OUT+ and OUT–. A squelch mode can also be programmed for
the output buffer. During secondary communications, the configuration program data are read into the
device control registers.

2.6 Serial Interface

The digital serial interface consists of the shift clock, the frame-synchronization signal, the ADC-channel
data output, and the DAC-channel data input. During the primary 16-bit frame-synchronization interval, the
SCLK transfers the ADC channel results from DOUT and transfers 16-bit DAC data into DIN.

During the secondary frame-synchronization interval, the SCLK transfers the register read data from DOUT
when the read bit is set to a 1. In addition, the SCLK transfers control and device parameter information into
DIN. The functional sequence is shown in Figure 2–1.

2–5

Register Read Data or All 0s

ADC Conversion Result

DAC Input Data

Control and Device Parameter

Data

16 SCLKs

16 SCLKs

Frame-Sync Interval

(primary communication)

Frame-Sync Interval

(secondary

communication)

SCLK

FS

DOUT

DIN

[ (B register)/2] FCLK Periods

†

†

The time between the primary and secondary frame sync is the time equal to filter clock (FCLK) period multiplied by the
B-register contents divided by two. The time interval is rounded to the nearest shift clock. The secondary frame-sync
signal goes from high to low on the next shift clock low-to-high transition after (B register/2) filter clock periods.

Figure 2–1. Functional Sequence for Primary and Secondary Communication

2.7 Number of Slaves

The maximum number of slaves is determined by the sum of the individual device delays from the
frame-sync (FS

) input low to the frame-sync delayed (FSD) low for all slaves according to equation 1:

(n) / tp(FS–FSD) < 1/2 shift-clock period

(1)

Where:

n is the number of slave devices.
Example:
From equation 1 above, the number of slaves is given by equation 2:

(n)

v

1
2

x (SCLK period) x

1

tp(FS*FSD

)

(2)

assuming the master clock is 10.368 MHz and the shift clock is 2.5965 MHz and tp(FS – FSD) is 40 ns, then
according to equation 3, the number of slaves is:

n

v

1

2.

5965

MHz

x

1
2

x

1

40 ns

+

1000

192

+

4.8

(3)

The maximum number of slaves under these conditions is four.

2–6

2.8 Required Minimum Number of MCLK Periods

Master with slave operation is summarized in the following sections.

2.8.1 TLC320AC01 AIC Master-Slave Summary

After initial setup and the master and slave frame syncs are separated, when secondary communication is
needed for a slave device, a 1 1 must be placed in the 2 LSBs of each primary data word for all devices in
the system, master and slave, by the host processor. In other words, all AICs must receive secondary frame
requests.

The host processor must issue the command by setting D01 and D00 to a 1 in the primary frame sync data
word of all devices. Then the master generates the master primary frame sync and, after the number of shift
clocks set by the FSD register value, the slave primary frame sync intervals. Then, after (B register value/2)
FCLK periods, the master secondary frame sync occurs first, and then the slave secondary frame sync
occurs. These are also rippled through the slave devices.

In other words, when a secondary communications interval is requested by the host processor as described
above:

1. The master outputs the master primary frame sync interval, and then the slave primary frame
sync intervals after the FSD register value number of shift clocks.

2. After (B register value/2) FCLK periods, the master then outputs the master secondary frame
sync interval, and after the FSD register value number of shift clocks, the slave secondary frame
sync intervals.

This sequence is shown in Figure 2–2.
The host must keep track of whether the master or a slave is then being addressed and also the number

of slave devices. The master always outputs a 00 in the last 2 bits of the DOUT word, and a slave always
outputs a 1 in the LSB of the DOUT word. This information allows the system to recognize a starting point
by interrogating the least significant bit of the DOUT word. If the LSB is 0, then that device is the master,
and the system is at the starting point.

Note: This identification always happens except in 16-bit mode when the 2 LSBs are not available

for identification purposes.

Sampling Period

(B Register Value/2) FCLK Periods

FSD Value

in SCLKs

Frame Sync

Sequence

MP SP1 SP2 SPn MS SS1 SS2 SSn MP

Period Symbol

Periods shown: Each period must be a minimum of 16 SCLKs plus 2 additional SCLKs

MP = Master Primary Period
SP1 = 1st Slave Primary Period
SP2 = 2nd Slave Primary Period
SPn = nth Slave Primary Period

MS = Master Secondary Period
SS1 = 1st Slave Secondary Period
SS2 = 2nd Slave Secondary Period
SSn = nth Slave Secondary Period

Figure 2–2. Timing Sequence

2–7

2.8.2 Notes on TLC320AC01/02 AIC Master-Slave Operation

Master/slave operational detail is summarized in the following notes:

1. The slave devices can be programmed independently of the master as long as the clock divide
register numbers are not changed. The gain settings, for example, can be changed
independently.

2. The method that is used to program a slave independently is to request a secondary
communication of the master and all slaves and ripple the delayed frame sync to the desired slave
device to be programmed.

3. Secondary frame syncs must be requested for all devices in the system or none. This is required
so that the master generates secondary frames for the slaves and allows the slaves to know that
the second frame syncs they receive are secondary frame syncs. Each device in the system must
receive a secondary frame request in its corresponding primary frame sync period (11 in the last
2 LSBs).

4. Calculation of the sampling frequency in terms of the master clock and the shift clock and the
respective register ratios is (see equations 4–6):

Sampling frequency+f

s

+

FCLK

B register value

+

f(MCLK

)

2 (A register value)

(B register value

)

(4)

Therefore,

f(MCLK

)

f

s

+2 (A register value) (B register value

)

(5)

and in terms of the shift clock frequency, since

(6)

f(SCLK)

f

s

+

(A register value)

(B register value

)

2

+

Number of SCLK periods

Sampling period

f(MCLK)+4 f(SCLK)

then

5. The minimum number of shift clocks between falling edges of any two frame syncs is 18 because
the frame sync delay register minimum number is 18.

When a secondary communication is requested by the host, the master secondary frame sync
begins at the middle of the sampling period (followed by the slave secondary frame syncs), so all
primary frame sync intervals (master and slave) must occur within one-half the sampling time.

2–8

The first secondary frame-sync falling edge, therefore, occurs at the following time (see
equation 7):

Time to first secondary frame sync

+

B register value

2

(

FCLK periods)+

(7)

A register value B register value (number of MCLK periods)

+

A register value B register value

4

(number of SCLK periods)

6. Number of frame sync intervals using equation 8.
All master and slave primary frame sync intervals must occur within the time of equation 7.
Since 18 shift clocks are required for each frame sync interval, then the number of frame sync

intervals from equation 8 is:

Number of frame sync intervals

+

A register value B register value

4 18 (SCLKsńframe sync interval)

(8

)

+

A register value B register value

72

7. Number of devices, master and slave, in terms of f(MCLK) and fs.
Substituting the value from equation 5 for the A ×B register value product gives the total number

of devices, including the master and all slaves that can be used, for a given master clock and
sampling frequency . Therefore, using equation 9:

Number of devices

+

f(MCLK)

144 f

s

(9)

8. Number of devices, master and slave, if slave devices are reprogrammed.
Equation 9 does not include reprogramming the slave devices after the frame sync delay occurs.

So if programming is required after shifting the slave frame syncs by the FSD register, then the
total number of devices is given by equation 10 is:

Number of devices

+

f(MCLK)

288 f

s

(10)

9. Example of the maximum number of devices if the slave devices are reprogrammed assuming
the following values:

f(MCLK)+10.368 MHz, f

s

+

8kHz

then from equation 10,

Maximum number of devices

+

10.368 MHz
288

(

8kHz

)

+

4.5

therefore, one master and three slaves can be used.

2–9

2.9 Operating Frequencies

2.9.1 Master and Stand-Alone Operating Frequencies

The sampling (conversion) frequency is derived from the master-clock (MCLK) input by equation 11:

fs+

Sampling (conversion) frequency

+

MCLK

(A register value) (B register value) 2

(11)

The inverse is the time between the falling edges of two successive primary frame-synchronization signals.
The input and output data clock (SCLK) frequency is given in equation 12:

SCLK frequency

+

MCLK frequency

4

(12)

2.9.2 Slave and Codec Operating Frequencies

The slave operating frequencies are either the default values or programmed by the control data word from
the master and codec conversion and the data frequencies are determined by the externally applied SCLK
and FS

signals.

2.10 Switched-Capacitor Filter Frequency (FCLK)

The filter clock (FCLK) is an internal clock signal that determines the filter band-pass frequency and is the
B counter clock. The frequency of the filter clock is derived by equation 13:

FCLK

+

MCLK

(A register value) 2

(13)

2.11 Filter Bandwidths

The low-pass (LP) filter –3 dB corner is derived in equation 14:

f(LP)

+

FCLK

40

+

MCLK

40 (A register value) 2

(14)

The high-pass (HP) filter –3 dB corner is derived in equation 15:

f(HP)

+

Sampling frequency

200

+

MCLK

200 2 (A register value) (B register value)

(15)

2.12 Master and Stand-Alone Modes

The difference between the master and stand-alone modes is that in the stand-alone mode there are no
slave devices. Functionally these two modes are the same. In both, the AIC internally generates the shift
clock and frame-sync signal for the serial communications. These signals and the filter clock (FCLK) are
derived from the input master clock.The master clock applied at the MCLK input determines the internal
device timing. The shift clock frequency is a divide-by-four of the master clock frequency and shifts both the
input and output data at DIN and DOUT, respectively, during the frame-sync interval (16 shift clocks long).
To begin the communication sequence, the device is reset (see Section 2.2.1), and the first frame sync
occurs approximately 648 master clocks after the reset condition disappears.

2.12.1 Register Programming

All register programming occurs during secondary communications, and data is latched and valid on the
sixteenth falling edge of SCLK. After a reset condition, eight primary and secondary communications cycles
are required to set up the eight programmable registers. Registers 1 through 8 are programmed in
secondary communications intervals 1 through 8, respectively. If the default value for a particular register
is desired, that register does not need to be addressed during the secondary communications. The no-op
command addresses the pseudo-register (register 0), and no register programming takes place during this
communications. The no-op command allows phase shifts of the sampling period without reprogramming
any register.

During the eight register programming cycles, DOUT is in the high-impedance state. DOUT is released on
the rising edge of the eighth primary internal frame-sync interval. In addition, each register can be read back

2–10

during DOUT secondary communications by setting the read bit to 1 in the appropriate register. Since the
register is in the read mode, no data can be written to the register during this cycle. To return this register
to the write mode requires a subsequent secondary communication (see Section 2.19 for detailed register
description).

2.12.2 Master and Stand-Alone Functional Sequence

The A counter counts according to the contents of the A register, and the A counter frequency is divided by
two to produce the filter clock (FCLK). The B counter is clocked by FCLK with the following functional
sequence:

1. The B counter starts counting down from the B register value minus one. Each count remains in
the counter for one FCLK period including the zero count. This total counter time is referred to
as the B cycle. The end of the zero count is called the end of B cycle.

2. When the B counter gets to a count of nine, the analog-to-digital (A-to-D) conversion starts.

3. The A-to-D conversion is complete ten FCLK periods later.

4. FS

goes low on a rising edge of SCLK after the A-to-D conversion is complete. That rising edge
of SCLK must be preceded by a falling edge of SCLK, which is the first falling edge to occur after
the end of B cycle.

5. The D-to-A conversion cycle begins on the rising edge of the internal frame-sync interval and is
complete ten FCLK periods later.

2.13 Slave and Codec Modes

The only difference between the slave and codec modes is that the codec mode is controlled directly by the
host and does not use a delayed frame-sync signal. In both modes, the shift clock and the frame sync are
both externally generated and must be synchronous with MCLK. The conversion frequency is set by the time
interval of externally applied frame-sync falling edges except when the free-run function is selected by bit 5
of register 6 (see Section 2.15.4). The slave device or devices share the shift clock generated by the master
device but receive the frame sync from the previous slave in the chain. The Nth slave FS

receives the

(N–1)st slave FSD

output and so on. The first slave device in the chain receives FSD from the master.

2–11

2.13.1 Slave and Codec Functional Sequence

The A counter counts according to the contents of the A register, and the A counter frequency is divided by
two to produce the FCLK. The device function in the slave or codec mode is the same as steps 1 through
3 of the B cycle description in the master mode but differs as follows:

1. Same as master

2. Same as master

3. Same as master

4. All internal clocks stop 1/2 FCLK before the end of count 0 in the B counter cycle.

5. All internal clocks are restarted on the first rising edge of MCLK after the external FS

input goes

low. This operation provides the synchronization necessary when using an external FS

signal.

6. The D-to-A conversion starts on the rising edge of the internally generated frame-sync interval
at the end of the 16-shift clock data transfer.

In the slave mode, the master controls the phase adjustments for itself and all slaves since all devices are
programmed in the same frame-sync interval. In the codec mode, the shift clock and frame sync are
externally generated and provide the timing for the ADC and DAC if the free-run function has not been
selected (see Subsection 2.15.4). In the codec mode, there is usually no need for phase adjustments;
however, any required phase adjustments must be made by adjusting the external frame-sync timing
(sampling time).

2.13.2 Slave Register Programming

When slave devices are used on power-up or reset, all slave frame-sync signals occur at the same time as
the master frame-sync signal and all slave devices are programmed during the master secondary frame­sync interval with the same data as the master. The last register programmed must be the frame-sync delay
(FSD) register because the delay starts immediately on the rising edge of the seventeenth shift clock of that
frame- sync interval. After the FSD register programming is completed for the master and slave, the slave
primary frame interval is shifted in time (time slot allocated) according to the data contained in the slave FSD
registers. The master then generates frame-sync intervals for itself and each slave to synchronize the host
serial port for data transfers for itself and all slave devices.

The number of slaves is specified in the FSN register (register 8); therefore, the number of frame-sync
intervals generated by the master is equal to the number of slaves plus one (see Section 2.7). These master
frame-sync intervals are separated in time by the delay time specified by the FSD register (register 7). These
master-generated intervals are the only frame-sync interval signals applied to the host serial port to provide
the data-transfer time slot for the slave devices.

2.14 Terminal Functions

2.14.1 Frame-Sync Function

The frame-sync signal indicates that the device is ready to send and receive data for both master and slave
modes. The data transfer begins on the falling edge of the frame-sync signal.

2.14.1.1 Frame Sync (FS), Master Mode

The frame sync is generated internally. FS goes low on the rising edge of SCLK and remains low for the
16-bit data transfer. In addition to generating its own frame-sync interval, the master also outputs a frame
sync for each slave that is being used.

2–12

2.14.1.2 Frame-Sync Delayed (FSD), Master Mode

For the master, the frame-sync delayed output occurs 1/2 shift-clock period ahead of FS to compensate for
the time delay through the master and slave devices. The timing relationships are as follows:

1. When the FSD register data is 0, then FSD

goes low on the falling edge of SCLK prior to the rising

edge of SCLK when FS goes low (see Figure 4–4).

2. When the FSD register data is greater than 17, then FSD

goes low on a rising edge of SCLK that

is the FSD register number of SCLKs after the falling edge of FS.

Register data values from 1 to 17 should not be used.

2.14.1.3 Frame Sync (FS), Slave Mode

The frame-sync timing is generated externally, applied to FS, and controls the ADC and DAC timing (see
Subsection 2.15.4). The external frame-sync width must be a minimum of one shift clock to be recognized
and can remain low until the next data frame is required.

2.14.1.4 Frame-Sync Delayed (FSD), Slave Mode

This output is fed from the master to the first slave and the first slave FSD output to the second and so on
down the chain. The FSD timing sequence in the slave mode is as follows:

1. When the FSD register data is 0, then FSD

goes low after FS goes low (see Figure 4–5).

2. When the FSD register data is greater than 17, FSD

goes low on a rising edge of SCLK that is

the FSD register number of SCLKs after the falling edge of FS.

Data values from 1 to 17 should not be used.

2.14.2 Data Out (DOUT)

DOUT is placed in the high-impedance state on the seventeenth rising edge of SCLK (internal or external)
after the falling edge of frame sync. In the primary communication, the data word is the ADC conversion
result. In the secondary communication, the data is the register read results when requested by the
read/write (R/W

) bit with the eight MSBs set to 0 (see Section 2.16). If no register read is requested, the

secondary word is all zeroes.

2.14.2.1 Data Out, Master Mode

In the master mode, DOUT is taken from the high-impedance state by the falling edge of frame sync. The
most significant data bit then appears on DOUT.

2.14.2.2 Data Out, Slave Mode

In the slave mode, DOUT is taken from the high-impedance state by the falling edge of the external frame
sync or the rising edge of the external SCLK, whichever occurs first (see Figure 4–7). The falling edge of
frame sync can occur

± 1/4 SCLK period around the SCLK rising edge (see Figure 4– 3). The most

significant data bit then appears on DOUT.

2.14.3 Data In (DIN)

In the primary communication, the data word is the digital input signal to the DAC channel. In the secondary
communication, the data is the control and configuration data to set up the device for a particular function
(see Section 2.16).

2.14.4 Hardware Program Terminals (FC1 and FC0)

These inputs provide for hardware programming requests for secondary communication or phase
adjustment. These inputs work in conjunction with the control bits D01 and D00 of the primary data word
or control bits DS15 and DS14 of the secondary data word. The data on FC1 and FC0 are latched on the
rising edge of the next internally generated primary or secondary frame-sync interval. These inputs should
be tied low if not used (see Section 2.17 and Table 2–3).

2–13

2.14.5 Midpoint Voltages (ADC V

MID

and DAC V

MID

)

Since the device operates at a single-supply voltage, two midpoint voltages are generated for internal signal
processing. ADC V

MID

is used for the ADC channel reference, and DAC V

MID

is used for the DAC channel

reference. Two references minimize channel-to-channel noise and crosstalk. ADC V

MID

and DAC V

MID

must be buffered when used as a reference for external signal processing.

2.15 Device Functions

2.15.1 Phase Adjustment

In some applications, such as modems, the device sampling period may require an adjustment to
synchronize with the incoming bit stream to improve the signal-to-noise ratio. The TLC320AC01 can adjust
the sampling period through the use of the A

′ register and the control bits.

2.15.1.1 Phase-Adjustment Control

A phase adjustment is a programmed variation in the sampling period. A sampling period is adjusted
according to the data value in the A

′ register, and the phase adjustment is that number of master clocks

(MCLK). An adjustment is made during device operation with data bits D01 and D00 in the primary
communication, with data bits DS15 and DS14 in the secondary word or in combination with the hardware
terminals FC1 and FC0 (see Table 2–3). This adjustment request is latched on the rising edge of the next
internal frame-sync interval and is only valid for the next sampling period. To repeat the phase adjustment,
another phase request must be initiated.

2.15.1.2 Use of the A′ Register for Phase Adjustment

The A′ register value makes slight timing adjustments to the sampling period. The sampling period
increases or decreases according to the sign of the programmed A

′ register value and the state of data bits

D01 and D00 in the primary data word.
The general equation for the conversion frequency is given in equation 16:

+

MCLK

(2 A register value B register value)"(AȀregister value)

fs = conversion frequency

(16)

Therefore, if A

′ = 0, the device conversion (sampling) frequency and period is constant.

If a nonzero A

′ value is programmed, the sampling frequency and period responds as shown in T able 2–2.

Table 2–2. Sampling Variation With A′

SIGN OF THE A′ REGISTER VALUE

D01 D00

PLUS VALUE

(+)

NEGATIVE VALUE

(–)

0

1

(increase command)

Frequency decreases,

period increases

Frequency increases,

period decreases

1

0

(decrease command)

Frequency increases,

period decreases

Frequency decreases,

period increases

An adjustment to the sampling period, which must be requested through D01 and D00 of the primary data
word to DIN, is valid for the following sampling period only. When the adjustment is required for the
subsequent sampling period, it must be requested again through D01 and D00 of the primary data word.
For each request, only the sampling period occurring immediately after the primary data word request is
affected.

2–14

The amount of time shift in the entire sampling period (1/fs) is as follows:
When the sampling period is set to 125 µs (8 kHz), the A′ register is loaded with decimal 10 and the

TLC320AC01 master clock frequency is 10.386 MHz. The amount of time each sampling period is increased
or decreased, when requested, is given in equation 17:

Time shift = (A

′ register value) × (MCLK period) (17)

The device changes the entire sampling period by only the MCLK period times the A

′ register value as given

in equation 18:

Change in sampling period = contents of A

′ register × master clock period

= 10

× 96.45 ns = 964 ns (less than 1% of the sampling period) (18)

The sampling period changes by 964.5 ns each time the phase adjustment is requested by the primary data
word (i.e., once per sampling period).

It is evident then that the change in sampling period is very small compared to the sampling period. To
observe this effect over a long period of time ( > sampling period), this change must be continuously
requested by the primary data word. If the adjustment is not requested again, the sampling period changes
only once and it may appear that there was no execution of the command. This is especially true when bench
testing the device. Automatic test equipment can test for results within a single sampling period.

Internally, the A

′ register value only affects one cycle (period) of the A counter. The A and A′ values are

additive, but only for one A-counter period. The A counter begins the first count at the default or programmed
A-register value and counts down to the A

′-register value. As the A′ value increases or decreases, the first

clock cycle from the A counter is lengthened or shortened. The initial A-counter period is the only counter
period affected by the A

′ register such that only this single period is increased or decreased.

2.15.2 Analog Loopback

This function allows the circuit to be tested remotely. In loopback, OUT+ and OUT– are internally connected
to IN+ and IN–. The DAC data bits D15 to D02 that are applied to DIN can be compared with the ADC output
data bits D15 to D02 at DOUT. There are some differences due to the ADC and DAC channel offset. The
loopback function is implemented by setting DS01 and DS00 to zero in control register 5 (see Section 2.19).
When analog loopback is enabled, the external inputs to IN+ and IN– are disconnected, but the signals at
OUT+ and OUT– may still be read.

2.15.3 16-Bit Mode

In the 16-bit mode, the device ignores the last two control bits (D01 and D00) of the primary word and
requests continual secondary communications to occur. By ignoring the last two primary communication
bits, compatibility with existing 16-bit software can be maintained. This function is implemented by setting
bit DS03 to 1 in register 6. To return to normal operation, DS03 must be reprogrammed to 0.

2.15.4 Free-Run Mode

With the free-run bit set in register 6, the external shift clock and frame sync control only the data transfer.
The ADC and DAC timing are controlled by the A and B register values, and the phase-shift adjustment must
be done as if the device is in stand-alone mode (by the software or the state of FC1 and FC0).

Phase adjustment cannot be made by adjustment of the frame-sync timing. The external frame sync must
occur within 1/2 FCLK period of the internal frame sync (FCLK as determined by the values of the A and
B registers).

When the external frame sync occurs simultaneously with the internal load, the data-transfer request by the
external frame sync takes precedence over an internal load command. The latching of the ADC conversion
data in the output register is inhibited until the current 16 bits are shifted out of the register by the shift clock.

2.15.5 Force Secondary Communication

With bit 2 in register 6 set to 1, secondary communication is requested continuously. It overrides all software
and hardware requests concerning secondary communication. Phase shifting, however, can still be
performed with the software and hardware.

2–15

2.15.6 Enable Analog Input Summing

By setting bits DS01 and DS00 to 11 in register 5, the normal analog input voltage is summed with the
auxiliary input voltage. The gain for the analog input amplifier is set by data bits DS03 and DS02 in register 4.

2.15.7 DAC Channel (sin x)/x Error Correction

The (sin x)/x compensation filter is designed for zero (sin x)/x error using a B-register value of 15. Since the
filter cannot be removed from the signal path, operation using another B-register value results in an error
in the reconstructed analog output. The error is given by equation 19. Any error compensation needed by
a given application can be performed in the software.

DAC channel frequency response error+20 log

10

ȧ

ȧ
ȧ

ȡ

Ȣ

sin

ǒ

2p A

B

f

MCLK

f

Ǔ

sin

ǒ

30p

A

f

MCLK

f

Ǔ

15

B

ȧ

ȧ
ȧ

ȣ

Ȥ

(19)

where:

f = the frequency of interest

f

MCLK

= the TLC320AC01 master-clock frequency
A = the A-register value
B = the B-register value

and the arguments of the sin functions are in radians.

2.16 Serial Communications

2.16.1 Stand-Alone and Master-Mode Word Sequence and Information Content During
Primary and Secondary Communications

For the stand-alone and master modes, the sequence in Figure 2–2 shows the relationship between the
primary and secondary communications interval, the data content into DIN, and the data content from
DOUT.

The TLC320AC01 can provide a phase-shift command or the next secondary communications interval by
decoding 1) the programmed state of the FC1 and FC0 inputs and the D01 and D00 data bits in the primary
data word, or 2) the state of the FC1 and FC0 inputs and the DS15 and DS14 data bits in the secondary
data word (see Table 2–3). When DS13 (the R/W

bit) is the default value of 0, all 16 bits from DOUT are

0 during secondary communication. However, when the R/W

bit is set to 1 in the secondary communication
control word, the secondary transmission from DOUT still contains 0s in the eight MSBs. The lower order
8 bits contain the data of the register currently being addressed. This function provides register status
information for the host.

2–16

DOUT

[ (B register)/2] FCLK Periods

†

Primary Frame Sync
(16 SCLKs long)

Secondary Frame Sync
(16 SCLKs long)

FS

2s-Complement ADC Output
(14 bits plus 00 for the two LSBs)

16 Bits All 0s, Except When in
Read Mode (then least significant
8 bits are register data)

DIN

2s-Complement Input for the DAC
Channel (14 bits plus two
function bits). If the 2 LSBs Are
Set to 1, Secondary Frame Sync Is
Generated by the TLC320AC01

Input Data for the Internal Registers
(16 bits containing control,
address, and data information)

†

The time between the primary and secondary frame sync is the time equal to filter clock (FCLK) period multiplied by the
B-register contents divided by two. The time interval is rounded to the nearest shift clock. The secondary frame-sync
signal goes from high to low on the next shift clock low-to-high transition after (B register/2) filter clock periods.

Figure 2–3. Master and Stand-Alone Functional Sequence

2.16.2 Slave and Codec-Mode Word Sequence and Information Content During

Primary and Secondary Communications

For the slave and codec modes, the sequence is basically the same as the stand-alone and master modes
with the exception that the frame sync and the shift clock are generated and controlled externally as shown
in Figure 2–3. For the codec mode, the frame-sync pulse width needs to be a minimum of one shift clock
long. The timing relationship between the frame sync and shift clock is shown in the timing diagrams. Phase
shifting is usually not required in the slave or codec mode because the frame-sync timing can be adjusted
externally if required.

DOUT

Primary Frame Sync Secondary Frame Sync

FS

2s-Complement ADC Output
(14 bits plus 00 for the 2 LSBs in
master and stand-alone mode and
01 in slave mode)

16 Bits, All 0s, Except When in
Read Mode (then least significant
8 bits are register data)

DIN

2s-Complement Input for the DAC
Channel (14 bits plus two
function bits)

Input Data for the Internal
Registers (16 bits containing
control, address, and data
information)

1 SCLK Minimum1 SCLK Minimum

NOTE A: The time between the primary and secondary frame syncs is determined by the application; however, enough

time must be provided so that the host can execute the required number of software instructions in the time
between the end of the primary data transfer (rising edge of the primary frame-sync interval) and the falling
edge of the secondary frame sync (start of secondary communications).

Figure 2–4. Slave and Codec Functional Sequence

2–17

2.17 Request for Secondary Serial Communication and Phase Shift

The following paragraphs describe a request for secondary serial communication and phase shift using
hardware control inputs FC1 and FC0, primary data bits D01 and D00, and secondary data bits DS15 and
DS14.

2.17.1 Initiating a Request

Combinations of FC1 and FC0 input conditions, bits D01 and D00 in the primary serial data word, FC1 and
FC0, and bits DS15 and DS14 in the secondary serial data word can initiate a secondary serial
communication or request a phase shift according to the following rules (see Table 2–3).

1. Primary word phase shifts can be requested by either the hardware or software when the other
set of signals are 11 or 00. If both hardware and software request phase shifts, the software
request is performed.

2. Secondary words can be requested by either the software or hardware at the same time that the
other set of signals is requesting a phase shift.

3. Hardware inputs FC1 and FC0 are ignored during the secondary word unless DS15 and DS14
are 11. When DS15 and DS14 are 01 or 10, the corresponding phase shift is performed. When
DS15 and DS14 are 00, no phase shift is performed even when the hardware requests a phase
shift.

2.17.2 Normal Combinations of Control

The normal combinations of control are as follows:

1. Use D01 and D00 and DS15 and DS14 to request phase shifts and secondary words by holding
FC1 and FC0 to 00.

2. Use FC1 and FC0 exclusively to request phase shifts and secondary words by holding D01 and
D00 to 00 and DS15 and DS14 to 11.

3. Use D01 and D00 only to request secondary words and FC1 and FC0 to perform phase shifts
once per period by holding DS15 and DS14 to 00.

2.17.3 Additional Control Options

Additional control options are unusual and are rarely needed or used; however, they are as follows:

1. Use D01 and D00 only to request secondary words and FC1 and FC0 to perform phase shifts
twice per period by holding DS15 and DS14 to 11.

2. Use FC1 and FC0 exclusively to request secondary words and D01 and D00 and DS15 and DS14
to perform phase shifts twice per period.

3. Use FC1 and FC0 to perform the phase shift after the primary word and DS15 and DS14 to
perform a phase shift after the secondary word by holding D01 and D00 to 11.

2–18

Table 2–3. Software and Hardware Requests for

Secondary Serial-Communication and Phase-Shift Truth Table

CONTROL HARDWARE

PHASE-SHIFT

WITHIN PRIMARY

OR SECONDARY

BITS TERMINALS

ADJUSTMENT

(see Section 2.15.1)

SECONDARY

REQUEST

DATA WORD

D01 D00 FC1 FC0 EARLIER LATER

(

see Note

1)

0
0
0
0

0
0
0
0

0
0
1
1

0
1
0
1

0
0
1
0

0
1
0
0

0
0
0
1

0
0
0
0

1
1
1
1

0
0
1
1

0
1
0
1

0
0
0
0

1
1
1
1

0
0
0
1

Primar

y

1
1
1
1

0
0
0
0

0
0
1
1

0
1
0
1

1
1
1
1

0
0
0
0

0
0
0
1

1
1
1
1

1
1
1
1

0
0
1
1

0
1
0
1

0
0
1
0

0
1
0
0

1
1
1
1

DS15 DS14 FC1 FC0 EARLIER LATER

0
0
0
0

0
0
0
0

0
0
1
1

0
1
0
1

0
0
0
0

0
0
0
0

Secondary

0
0
0
0

1
1
1
1

0
0
1
1

0
1
0
1

0
0
0
0

1
1
1
1

No request can be made for
secondary communication

1
1
1
1

0
0
0
0

0
0
1
1

0
1
0
1

1
1
1
1

0
0
0
0

within the secondary word.

1
1
1
1

1
1
1
1

0
0
1
1

0
1
0
1

0
0
1
0

0
1
0
0

NOTE 1: The 0 state indicates that a secondary communication is not being requested. The 1 state indicates that a

secondary communication is being requested.

2.18 Primary Serial Communications

Primary serial communications transfer the 14-bit DAC input plus two control bits (D01 and D00) to DIN of
the TLC320AC01.They simultaneously transfer the 14-bit ADC conversion result from DOUT to the
processor. The 2 LSBs are set to 0 in the ADC result.

2–19

2.18.1 Primary Serial Communications Data Format

D15 D14 D13 D12 D11 D10 D09 D08 D07 D06 D05 D04 D03 D02 D01 D00

14-bit DAC Conversion Result

2s-Complement Format

†

Control Bits

†

Since the supply voltage is single ended, the reference for 2s-complement format is ADC V

MID

. Voltages above

this reference have a 0 as the MSB, and voltages below this reference have a 1 as the MSB.

During primary serial communications, when D01 and D00 are both high in the DAC data word to DIN, a
subsequent 16 bits of control information is received by the device at DIN during a secondary
serial-communication interval. This secondary serial-communication interval begins at 1/2 the programmed
conversion time when the B register data value is even or 1/2 the programmed value minus one FCLK when
the B register data value is odd. The time between primary and secondary serial communication is
measured from the falling edge of the primary frame sync to the falling edge of the secondary frame sync
(see Section 2.19 for function and format of control words).

2.18.2 Data Format From DOUT During Primary Serial Communications

14-Bit ADC Conversion Result

2s-Complement Format

D15 is the Sign Bit

D15 D14 D13 D12 D11 D10 D09 D08 D07 D06 D05 D04 D03 D02 D01 D00

NJ

D01+0
D00+0

NJ

D01+0
D00+1

Master Mode

Slave Mode

2.19 Secondary Serial Communications

2.19.1 Data Format to DIN During Secondary Serial Communications

There are nine 16-bit configuration and control registers numbered from zero to eight. All register data
contents are represented in 2s-complement format. The general format of the commands during secondary
serial communications is as follows.

DS15 DS14 DS13 DS12 DS11 DS10 DS09 DS08 DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

Control Bits

(2 bits)

R/W

Bit

Register Address

(5 bits)

Register Data Value

(8 bits)

All control register words are latched in the register and valid on the sixteenth falling edge of SCLK.

2.19.2 Control Data-Bit Function in Secondary Serial Communication

2.19.2.1 DS15 and DS14

In the secondary data word, bits DS15 and DS14 perform the same control function as the primary control
bits D01 and D00 do in the primary data word.

DS15 DS14 DS13 DS12 DS11 DS10 DS09 DS08 DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

R/W

Register Address Register DataControl Bits

Hardware terminals FC1 and FC0 are valid inputs when DS15 and DS14 are both high, and they are ignored
for all other conditions.

2–20

2.19.2.2 DS13 (R/W Bit)

Reset and power-up procedures set this bit to a 0, placing the device in the write mode. When this bit is set
to 1, however, the previous data content of the register being addressed is read out to the host from DOUT
as the least significant 8 bits of the 16-bit secondary word. The first 8 bits remain set to 0. Reading the data
out is nondestructive, and the contents of the register remain unchanged.

A. Write Mode (DS13 = 0)

Data In. The data word to DIN has the following general format in the write mode.

DS15 DS14 DS13 DS12 DS11 DS10 DS09 DS08 DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

0 Register Address Register Data

Control Bits

Data Out. The shift clock shifts out all 0s as the pattern to the host from DOUT.

DS15 DS14 DS13 DS12 DS11 DS10 DS09 DS08 DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

0000000000000000

B. Read Mode (DS13 = 1)

Data In. The data word to DIN has the following format to allow a register read. Phase shifts can
also be done in the read mode.

DS15 DS14 DS13 DS12 DS11 DS10 DS09 DS08 DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

1 Register Address Ignored

Control Bits

Data Out. The shift clock clocks out the data of the register addressed from DOUT in the read mode in
the 8 LSBs.

DS15 DS14 DS13 DS12 DS11 DS10 DS09 DS08 DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

00000000 Register Data

2.20 Internal Register Format

2.20.1 Pseudo-Register 0 (No-Op Address)

This address represents a no-operation command. No register I/O operation takes place, so the device can
receive secondary commands for phase adjustment without reprogramming any register. A read of the
no-op is 0. The format of the command word is as follows:

DS15 DS14 DS13 DS12 DS11 DS10 DS09 DS08 DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

X0 0000XXXXXXXXControl Bits

2.20.2 Register 1 (A Register)

The following command loads DS07 (MSB) – DS00 into the A register.

DS15 DS14 DS13 DS12 DS11 DS10 DS09 DS08 DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

R/W

00010 Register DataControl Bits

The data in DS07 – DS00 determines the division of the master clock to produce the internal FCLK.

FCLK frequency = MCLK/(A register contents

× 2)

2–21

The default value of the A-register data is decimal 18 as shown below.

DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

00101000

2.20.3 Register 2 (B Register)

The following command loads DS07 (MSB) – DS00 into the B register.

DS15 DS14 DS13 DS12 DS11 DS10 DS09 DS08 DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

R/W

01000 Register DataControl Bits

The data in DS07 – DS00 controls the division of FCLK to generate the conversion clock as given in
equation 20:

Conversion frequency

+

FCLKń(B register contents)

+

MCLK

2 Are

g

ister contents Bregister contents

(20)

The default value of the B-register data is decimal 18 as shown below.

DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

00101000

2.20.4 Register 3 (A′ Register)

The following command contains the A′-register address and loads DS07(MSB) – DS00 into the A′ register.

DS15 DS14 DS13 DS12 DS11 DS10 DS09 DS08 DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

R/W

01010 Register DataControl Bits

The data in DS07 – DS00 is in 2s-complement format and controls the number of master-clock periods that
the sampling time is shifted.

The default value of the A

′-register data is 0 as shown below.

DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

00000000

2–22

2.20.5 Register 4 (Amplifier Gain-Select Register)

The following command contains the amplifier gain-select register address with selection code for the
monitor output (DS05–DS04), analog input (DS03–DS02), and analog output (DS01–DS00)
programmable gains.

DS15 DS14 DS13 DS12 DS11 DS10 DS09 DS08 DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

R/W

00001Control Bits XX

**** **

Monitor output gain = squelch
Monitor output gain = 0 dB
Monitor output gain = –8 dB
Monitor output gain = –18 dB

0
0
1
1

0
1
0
1

0
0
1
1

0
1
0
1

0
0
1
1

0
1
0
1

Analog input gain = squelch
Analog input gain = 0 dB
Analog input gain = 6 dB
Analog input gain = 12 dB

Analog output gain = squelch
Analog output gain = 0 dB
Analog output gain = –6 dB
Analog output gain = –12 dB

The default value of the monitor output gain is squelch, which corresponds to data bits DS05 and DS04 equal
to 00 (binary).
The default value of the analog input gain is 0 dB, which corresponds to data bits DS03 and DS02 equal
to 01 (binary).
The default value of the analog output gain is 0 dB, which corresponds to data bits DS01 and DS00 equal
to 01 (binary).

The default data value is shown below.

DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

00000011

2.20.6 Register 5 (Analog Configuration Register)

The following command loads the analog configuration register with the individual bit functions described
below.

DS15 DS14 DS13 DS12 DS11 DS10 DS09 DS08 DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

R/W

00011Control Bits XX

X

** **

Must be set to 0 0

High-pass filter disabled
High-pass filter enabled

Enable analog input summing

X

1

Analog loopback enabled 00
Enables IN+ and IN– (disables AUXIN+ and AUXIN–) 0 1
Enables AUXIN+ and AUXIN– (disables IN+ and IN–)

10
11

0

The default value of the high-pass-filter enable bit is 0, which places the high-pass filter in the signal path.
The default values of DS01 and DS00 are 0 and 1 which enables IN+ and IN–.

2–23

The power-up and reset conditions are as shown below.

DS03 DS02 DS01 DS00

0010

In the read mode, eight bits are read but the 4 LSBs are repeated as the 4 MSBs.

2.20.7 Register 6 (Digital Configuration Register)

The following command loads the digital configuration register with the individual bit functions described
below.

DS15 DS14 DS13 DS12 DS11 DS10 DS09 DS08 DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

R/W

01001Control Bits XX

** **

ADC and DAC conversion free run
Inactive

1
0

FSD output disable
Enable

1
0

16-Bit mode, ignore primary LSBs
Normal operation

1
0

Software reset
(upon reset, this bit is automatically reset to 0)
Inactive reset

1

Software power-down active (automatically reset to 0
after PWR

DWN is cycled high to low and back to high)

1

0

**

Force secondary communications
Normal operation

1
0

0

Power-down function external
(uses PWR DWN)

The default value of DS07–DS00 is 0 as shown below.

DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

00000000

2.20.8 Register 7 (Frame-Sync Delay Register)

The following command contains the frame-sync delay (FSD) register address and loads DS07
(MSB) –DS00 into the FSD register. The data byte (DS01 –DS00) determines the number of SCLKs
between FS

and the delayed frame-sync signal, FSD. The minimum data value for this register is

decimal 18.

DS15 DS14 DS13 DS12 DS11 DS10 DS09 DS08 DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

R/W

01011 Register DataControl Bits

The default value of DS07 – DS00 is 0 as shown below.

DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

00000000

When using a slave device, register 7 must be the last register programmed.

2–24

2.20.9 Register 8 (Frame-Sync Number Register)

The following command contains the frame-sync number (FSN) register address and loads DS07
(MSB)–DS00 into the FSN register. The data byte determines the number of frame-sync signals generated
by the TLC320AC01. This number is equal to the number of slaves plus one.

DS15 DS14 DS13 DS12 DS11 DS10 DS09 DS08 DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

R/W

00100 Register DataControl Bits

The default value of DS07–DS00 is 1 as shown below.

DS07 DS06 DS05 DS04 DS03 DS02 DS01 DS00

00000010

3–1

3 Specifications

3.1 Absolute Maximum Ratings Over Operating Free-Air Temperature Range
(Unless Otherwise Noted)

†

Supply voltage range, DGTL V

DD

(see Notes 1 and 2) –0.3 V to 6.5 V. . . . . . . . . . . . . . .

Supply voltage range, DAC V

DD

(see Notes 1 and 2) –0.3 V to 6.5 V. . . . . . . . . . . . . . . .

Supply voltage range, ADC V

DD

(see Notes 1 and 2) –0.3 V to 6.5 V. . . . . . . . . . . . . . . .

Differential supply voltage range, DGTL V

DD

to DAC VDD –0.3 V to 6.5 V. . . . . . . . . . . .

Differential supply voltage range, all positive supply voltages to

ADC GND, DAC GND, DGTL GND, SUBS –0.3 V to 6.5 V. . . . . . . . . . . . . . . . . . . .

Output voltage range, DOUT –0.3 V to DGTL V

DD

+ 0.3 V. . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range, DIN –0.3 V to DGTL V

DD

+ 0.3 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ground voltage range, ADC GND, DAC GND,

DGTL GND, SUBS –0.3 V to DGTL V

DD

+ 0.3 V. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range, T

A

0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, T

stg

–40°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . .

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These
are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated
under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for
extended periods may affect device reliability.

3.2 Recommended Operating Conditions (see Note 2)

MIN NOM MAX UNIT

V

DD

Positive supply voltage 4.5 5 5.5 V
Steady-state differential voltage between any two supplies 0.1 V

V

IH

High-level digital input voltage 2.2 V

V

IL

Low-level digital input voltage 0.8 V

I

O

Load output current from ADC V

MID

and DAC 100 µA

Conversion time for the ADC and DAC channels 10 FCLK periods

f

MCLK

Master-clock frequency 10.368 15 MHz

V

ID(PP)

Analog input voltage (differential, peak to peak) 6 V
Differential output load resistance 600

R

L

Single-ended to buffered DAC V

MID

voltage load resistance 300

Ω

T

A

Operating free-air temperature 0 70 °C

NOTES: 1. Voltage values for DGTL VDD are with respect to DGTL GND, voltage values for DAC VDD are with respect

to DAC GND, and voltage values for ADC VDD are with respect to ADC GND. For the subsequent electrical,
operating, and timing specifications, the symbol VDD denotes all positive supplies. DAC GND, ADC GND,
DGTL GND, and SUBS are at 0 V unless otherwise specified.

2. To avoid possible damage to these CMOS devices and associated operating parameters, the sequence
below should be followed when applying power:

(1) Connect SUBS, DGTL GND, ADC GND, and DAC GND to ground.
(2) Connect voltages ADC VDD,and DAC VDD.
(3) Connect voltage DGTL VDD.
(4) Connect the input signals.

When removing power, follow the steps above in reverse order.

3–2

3.3 Electrical Characteristics Over Recommended Range of Operating
Free-Air Temperature, MCLK = 5.184 MHz, V

DD

= 5 V, Outputs

Unloaded, Total Device

PARAMETER TEST CONDITIONS MIN TYP

†

MAX UNIT

Supply

PWR DWN = 1 and clock signals
present

20 25 mA

I

DD

y

current

PWR

DWN = 0 after 500 µs and

clock signals present

1 2 mA

PWR DWN = 1 and clock signals
present

100 mW

P

D

Power
dissipation

PWR

DWN = 0 after 500 µs and

clock signals present

5 mW

Software power down, (bit D00,
register 6 set to 1)

15 20 mW

ADC V

MID

Midpoint
voltage

No load

ADC VDD/2

–0.1

ADC VDD/2

+0.1

V

DAC V

MID

Midpoint
voltage

No load

DAC VDD/2

–0.1

DAC VDD/2

+0.1

V

3.4 Electrical Characteristics Over Recommended Range of Operating
Free-Air Temperature, V

DD

= 5 V, Digital I/O Terminals (DIN, DOUT, EOC,

FC0, FC1, FS

, FSD, MCLK, M/S, SCLK)

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

V

OH

High-level output voltage IOH = –1.6 mA 2.4 V

V

OL

Low-level output voltage IOL = 1.6 mA 0.4 V

I

IH

High-level input current, any digital input VI = 2.2 V to DGTL V

DD

10 µA

I

IL

Low-level input current, any digital input VI = 0 V to 0.8 V 10 µA

C

i

Input capacitance 5 pF

C

o

Output capacitance 5 pF

†

All typical values are at VDD = 5 V and TA = 25°C.

3.5 Electrical Characteristics Over Recommended Range of Operating
Free-Air Temperature, V

DD

= 5 V, ADC and DAC Channels

3.5.1 ADC Channel Filter Transfer Function, FCLK = 144 kHz, fs = 8 kHz

PARAMETER TEST CONDITIONS MIN MAX UNIT

fi = 50 Hz –2
fi = 200 Hz –1.8 –0.15
fi = 300 Hz to 3 kHz –0.15 0.15

Gain relative to gain at fi = 1020 Hz (see Note 3)

fi = 3.3 kHz –0.35 0.03

dB
fi = 3.4 kHz –1 –0.1
fi = 4 kHz –14
fi ≥ 4.6 kHz –32

NOTE 3: The differential analog input signals are sine waves at 6 V peak to peak. The reference gain is at 1020 Hz.

3–3

3.5.2 ADC Channel Input, VDD = 5 V, Input Amplifier Gain = 0 dB (Unless Otherwise
Noted)

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

p

p

Single-ended 3 V

V

I(PP)

Peak-to-peak input voltage (see Note 4)

Differential 6 V

ADC converter offset error Band-pass filter selected 10 30 mV

CMRR

Common-mode rejection ratio at IN+, IN–,
AUX IN+, AUX IN– (see Note 5)

55 dB

r

i

Input resistance at IN+, IN–, AUX IN+,
AUX IN–

100 kΩ

Squelch

DS03, DS02 = 0 in
register 4

60 dB

†

All typical values are at VDD = 5 V and TA = 25°C.

NOTES: 4. The differential range corresponds to the full-scale digital output.

5. Common-mode rejection ratio is the ratio of the ADC converter offset error with no signal and the ADC
converter offset error with a common-mode nonzero signal applied to either IN + and IN – together or
AUX IN+ and AUX IN– together.

3.5.3 ADC Channel Signal-to-Distortion Ratio, VDD = 5 V, fs = 8 kHz (Unless
Otherwise Noted)

AV = 0 dB AV = 6 dB AV = 12 dB

PARAMETER

TEST CONDITIONS

MIN MAX MIN MAX MIN MAX

UNIT

VI = –6 dB to –1 dB 68 — —
VI = –12 dB to –6 dB 63 68 —
VI = –18 dB to –12 dB 56 63 68

ADC channel signal-to-

VI = –24 dB to –18 dB 51 57 63

distortion ratio
(

see Note 6

)

VI = –30 dB to –24 dB 43 51 57

dB

(see Note 6)

VI = –36 dB to –30 dB 39 45 51
VI = –42 dB to –36 dB 33 39 45
VI = –48 dB to –42 dB 27 32 39

NOTE 6: The analog-input test signal is a 1020-Hz sine wave with 0 dB = 6 V peak to peak as the reference level for

the analog-input signal.

3.5.4 DAC Channel Filter Transfer Function, FCLK = 144 kHz, fs = 9.6 kHz, VDD = 5 V

PARAMETER TEST CONDITIONS MIN MAX UNIT

fi < 200 Hz 0.15
fi = 200 Hz –0.5 0.15
fi = 300 Hz to 3 kHz –0.15 0.15

Gain relative to gain at fi = 1020 Hz (see Note 7)

fi = 3.3 kHz –0.35 0.03

dB
fi = 3.4 kHz –1 –0.1
fi = 4 kHz –14
fi ≥ 4.6 kHz –32

NOTE 7: The input signal is the digital equivalent of a 1020-Hz sine wave (digital full scale = 0 dB). The nominal

differential DAC channel output with this input condition is 6 V peak to peak.

3–4

3.5.5 DAC Channel Signal-to-Distortion Ratio, VDD = 5 V, fs = 8 kHz (Unless
Otherwise Noted)

AV = 0 dB AV = –6 dB AV = –12 dB

PARAMETER

TEST CONDITIONS

MIN MAX MIN MAX MIN MAX

UNIT

VO = –6 dB to 0 dB 68 — —
VO = –12 dB to –6 dB 63 68 —
VO = –18 dB to –12 dB 57 63 68

DAC channel signal-to-

VO = –24 dB to –18 dB 51 57 63

distortion ratio
(

see Note 8

)

VO = –30 dB to –24 dB 45 51 57

dB

(see Note 8)

VO = –36 dB to –30 dB 39 45 51
VO = –42 dB to –36 dB 33 39 48
VO = –48 dB to –42 dB 27 33 39

NOTE 8: The input signal, VI, is the digital equivalent of a 1020-Hz sine wave (full-scale analog output at full-scale digital

input = 0 dB). The nominal differential DAC channel output with this input condition is 6 V peak to peak. The
load impedance for the DAC output buffer is 600 Ω from OUT+ to OUT –.

3.5.6 System Distortion, VDD = 5 V, fs = 8 kHz, FCLK = 144 kHz (Unless Otherwise
Noted)

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

p

Single-ended input (see Note 9)

82

ADC channel

Second harmonic

Differential input (see Note 9) 70 82

attenuation

Third harmonic and

Single-ended input (see Note 9) 77

higher harmonics

Differential input (see Note 9) 70 77
Single-ended output

Second harmonic

(buff

ered

DAC V

MID

)

(see Note 10)

82

dB

DAC channel

Differential output (see Note 10) 70 82

attenuation

Third harmonic and

Single-ended output
(see Note 10)

77

higher harmonics

Differential output (see Note 10) 70 77

†

All typical values are at VDD = 5 V and TA = 25°C.

NOTES: 9. The input signal is a 1020-Hz sine wave for the ADC channel. Harmonic distortion is defined for an input

level of –1 dB.

10. The input signal is the digital equivalent of a 1020-Hz sine wave (digital full scale = 0 dB). The nominal
differential DAC channel output with this input condition is 6 V peak to peak. The load impedance for the
DAC output buffer is 600 Ω from OUT+ to OUT–. Harmonic distortion is specified for a signal input level
of 0 dB.

3–5

3.5.7 Noise, Low-Pass and Band-Pass Switched-Capacitor Filters Included,
V

DD

= 5 V (Unless Otherwise Noted)

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

Inputs tied to ADC V

MID

,

ADC idle-channel noise

f

s

=

8 kH

z,

FCLK

=

144 kH

z,

(see Note 11)

180

300

Broad-band noise

DIN INPUT = 00000000000000

,

180 300

µVrms

DAC idl

e-channe

l

Noise (0 to 7.2 kHz)

DIN INPUT 00000000000000,

fs = 8 kHz, FCLK = 144 kHz,

180 300

noise

Noise (0 to 3.6 kHz)

(see Note 12)

180 300

†

All typical values are at VDD = 5 V and TA = 25°C.

NOTES: 11. The ADC channel noise is calculated by taking the RMS value of the digital output codes of the ADC

channel and converting to microvolts.

12. The DAC channel noise is measured differentially from OUT+ to OUT– across 600 Ω.

3.5.8 Absolute Gain Error, VDD = 5 V, fs = 8 kHz (Unless Otherwise Noted)

PARAMETER TEST CONDITIONS MIN MAX UNIT

p

TA = 25°C ±0.5

ADC channel absolute gain error (see Note 13)

–1-dB

input signal

TA = 0 – 70°C ±1

0-dB input signal,

TA = 25°C ±0.5

dB

DAC channel absolute gain error (see Note 14)

g

RL = 600 Ω

TA = 0 – 70°C ±1

NOTES: 13. ADC absolute gain error is the variation in gain from the ideal gain over the specified input signal levels.

The gain is measured with a –1-dB, 1020-Hz sine wave. The –1-dB input signal allows for any positive gain
or offset error that may affect gain measurements at or close to 0-dB input signal levels.

14. The DAC input signal is the digital equivalent of a 1020-Hz sine wave (full-scale analog output at digital full­scale input = 0 dB). The nominal differential DAC channel output voltage with this input condition is 6 V peak
to peak. The load impedance for the DAC output buffer is 600 Ω from OUT+ to OUT–.

3.5.9 Relative Gain and Dynamic Range, VDD = 5 V, fs = 8 kHz (Unless Otherwise
Noted)

PARAMETER TEST CONDITIONS MIN MAX UNIT

ADC channel relative gain tracking error
(see Note 15)

–48-dB to –1-dB input signal range ±0.15

DAC channel relative gain tracking error
(see Note 16)

–48-dB to 0-dB input signal range
R

L(diff)

= 600 Ω

±0.15

dB

NOTES: 15. ADC gain tracking is the ratio of the measured gain at one ADC channel input level to the gain measured

at any other input level. The ADC channel input is a –1-dB 1020-Hz sine wave input signal. A –1-dB input
signal allows for any positive gain or offset error that may affect gain measurements at or close to 0-dB ADC
input signal levels.

16. DAC gain tracking is the ratio of the measured gain at one DAC channel digital input level to the gain
measured at any other input level. The DAC-channel input signal is the digital equivalent of a 1020-Hz sine
wave (digital full scale = 0 dB). The nominal differential DAC channel output voltage with this input condition
is 6 V peak to peak. The load impedance for the DAC output buffer is 600 Ω from OUT+ to OUT–.

3–6

3.5.10 Power-Supply Rejection, VDD = 5 V (Unless Otherwise Noted) (see Note 17)

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

pp

fi = 0 to 30 kHz 50

ADC V

DD

Suppl

y-v

oltage rejection ratio, ADC channel

fi = 30 to 50 kHz 55

pp

fi = 0 to 30 kHz 40

DAC V

DD

Suppl

y-v

oltage rejection ratio, DAC channel

fi = 30 to 50 kHz 45

pp

fi = 0 to 30 kHz 50

DGTL VDDSuppl

y-v

oltage rejection ratio, ADC channel

fi = 30 to 50 kHz 55
Single ended,

fi = 0 to 30 kHz

40

dB

pp

fi = 30 to 50 kHz 45

DGTL VDDSuppl

y-v

oltage rejection ratio, DAC channel

Differential,
fi = 0 to 30 kHz

40

fi = 30 to 50 kHz 45

†

All typical values are at VDD = 5 V and TA = 25°C.

NOTE 17: Power supply rejection measurements are made with both the ADC and the DAC channels idle and a 200-mV

peak-to-peak signal applied to the appropriate supply .

3.5.11 Crosstalk Attenuation, VDD = 5 V (Unless Otherwise Noted)

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

ADC channel crosstalk attenuation

DAC channel idle with
DIN = 00000000000000,
ADC input = 0 dB,
1020-Hz sine wave,
Gain = 0 dB (see Note 18)

80 dB

ADC channel idle with INP, INM,
AUX IN+, and AUX IN– at ADC V

MID

80

DAC channel crosstalk attenuation

DAC channel input = digital equivalent
of a 1020-Hz sine wave (see Note 19)

80

dB

†

All typical values are at VDD = 5 V and TA = 25°C.

NOTES: 18. The test signal is a 1020-Hz sine wave with a 0 dB = 6-V peak-to-peak reference level for the analog input

signal.

19. The input signal is the digital equivalent of a 1020-Hz sine wave (digital full scale = 0 dB). The nominal
differential DAC channel output with this input condition is 6 V peak to peak. The load impedance for the
DAC output buffer is 600 Ω from OUT+ to OUT–.

3–7

3.5.12 Monitor Output Characteristics, VDD = 5 V (Unless Otherwise Noted)
(see Note 20)

PARAMETER TEST CONDITIONS MIN TYP

†

MAX UNIT

V

O(PP)

Peak-to-peak ac output
voltage

Quiescent level = ADC V

MID

ZL = 10 kΩ and 60 pF

1.3 1.5 V

V

OO

Output offset voltage

No load, single ended
relative to ADC V

MID

5 10 mV

V

OC

Output common-mode voltage No load

0.4 ADC
V

DD

0.5 ADC
V

DD

0.6 ADC
V

DD

V

r

o

DC output resistance 50 Ω

Gain = 0 dB –0.2 0 0.2
Gain 2 = –8 dB –8.2 –8 –7.8

AVVoltage gain (see Note 21)

Gain 3 = –18 dB –18.4 –18 –17.6

dB

Squelch (see Note 22) –60

†

All typical values are at VDD = 5 V and TA = 25°C.

NOTES: 20. All monitor output tests are performed with a 10-kΩ load resistance.

21. Monitor gains are measured with a 1020-Hz, 6-V peak-to-peak sine wave applied differentially between
IN+ and IN–.The monitor output gains are nominally 0 dB, –8 dB, and –18 dB relative to its input; however,
the output gains are –6 dB relative to IN+ and IN– or AUX IN+ and AUX IN–.

22. Squelch is measured differentially with respect to ADC V

MID

.

3–8

3.6 Timing Requirements and Specifications in Master Mode

3.6.1 Recommended Input Timing Requirements for Master Mode, VDD = 5 V

MIN NOM MAX UNIT

t

r(MCLK)

Master clock rise time 5 ns

t

f(MCLK)

Master clock fall time 5 ns
Master clock duty cycle 40% 60%

t

w(RESET)

RESET pulse duration 1 MCLK

t

su(DIN)

DIN setup time before SCLK low (see Figure 4–2) 25 ns

t

h(DIN)

DIN hold time after SCLK low (see Figure 4–2) 20 ns

3.6.2 Operating Characteristics Over Recommended Range of Operating Free-Air
T emperature, V

DD

= 5 V (Unless Otherwise Noted) (see Note 23)

PARAMETER MIN TYP†MAX UNIT

t

f(SCLK)

Shift clock fall time (see Figure 4–2) 13 18 ns

t

r(SCLK)

Shift clock rise time (see Figure 4–2) 13 18 ns
Shift clock duty cycle 45% 55%

t

d(CH-FL)

Delay time from SCLK high to FSD low
(see Figures 4–2 and 4–4 and Note 24)

5 15 ns

t

d(CH-FH)

Delay time from SCLK high to FS high (see Figure 4–2) 5 20 ns

t

d(CH-DOUT)

Delay time from SCLK high to DOUT valid
(see Figures 4–2 and 4–7)

20 ns

t

d(CH-DOUTZ)

Delay time from SCLK↑ to DOUT in high-impedance state
(see Figure 4–8)

20 ns

t

d(ML-EL)

Delay time from MCLK low to EOC low (see Figure 4–9) 40 ns

t

d(ML-EH)

Delay time from MCLK low to EOC high (see Figure 4–9) 40 ns

t

f(EL)

EOC fall time (see Figure 4–9) 13 ns

t

r(EH)

EOC rise time (see Figure 4–9) 13 ns

t

d(MH-CH)

Delay time from MCLK high to SCLK high 50 ns

t

d(MH-CL)

Delay time from MCLK high to SCLK low 50 ns

†

All typical values are at VDD = 5 V and TA = 25°C.

NOTES: 23. All timing specifications are valid with CL = 20 pF.

24. FSD

occurs 1/2 shift-clock cycle ahead of FS when the device is operating in the master mode.

3–9

3.7 Timing Requirements and Specifications in Slave Mode and Codec

Emulation Mode

3.7.1 Recommended Input Timing Requirements for Slave Mode, VDD = 5 V

MIN NOM MAX UNIT

t

r(MCLK)

Master clock rise time 5 ns

t

f(MCLK)

Master clock fall time 5 ns
Master clock duty cycle 40% 60%

t

w(RESET)

RESET pulse duration 1 MCLK

t

su(DIN)

DIN setup time before SCLK low (see Figure 4–3) 20 ns

t

h(DIN)

DIN hold time after SCLK high (see Figure 4–3) 20 ns

t

su(FL-CH)

Setup time from FS low to SCLK high ±SCLK/4 ns

3.7.2 Operating Characteristics Over Recommended Range of Operating Free-Air
T emperature, V

DD

= 5 V (Unless Otherwise Noted) (see Note 23)

PARAMETER MIN TYP†MAX UNIT

t

c(SCLK)

Shift clock cycle time (see Figure 4–3) 125 ns

t

f(SCLK)

Shift clock fall time (see Figure 4–3) 18 ns

t

r(SCLK)

Shift clock rise time (see Figure 4–3) 18 ns
Shift clock duty cycle 45% 55%

t

d(CH-FDL)

Delay time from SCLK high to FSD low (see Figure 4–6) 50 ns

t

d(CH-FDH)

Delay time from SCLK high to FSD high 40 ns

t

d(FL-FDL)

Delay time from FS low to FSD low (slave to slave)
(see Figure 4–5)

40 ns

t

d(CH-DOUT)

Delay time from SCLK high to DOUT valid
(see Figures 4–3 and 4–7)

40 ns

t

d(CH-DOUTZ)

Delay time from SCLK↑ to DOUT in high-impedance state
(see Figure 4–8)

20 ns

t

d(ML-EL)

Delay time from MCLK low to EOC low (see Figure 4–9) 40 ns

t

d(ML-EH)

Delay time from MCLK low to EOC high (see Figure 4–9) 40 ns

t

f(EL)

EOC fall time (see Figure 4–9) 13 ns

t

r(EH)

EOC rise time (see Figure 4–9) 13 ns

t

d(MH-CH)

Delay time from MCLK high to SCLK high 50 ns

t

d(MH-CL)

Delay time from MCLK high to SCLK low 50 ns

†

All typical values are at VDD = 5 V and TA = 25°C.

NOTE 23: All timing specifications are valid with CL = 20 pF.

3–10

4–1

4 Parameter Measurement Information

_

+

IN+ or AUX IN+

IN– or AUX IN–

To Multiplexer

R

fb

R

fb

_

+

Rfb = R for DS03 = 0 and DS02 = 1
Rfb = 2R for DS03 = 1 and DS02 = 0
Rfb = 4R for DS03 = 1 and DS02 = 1
R = 100 kΩ nominal

R

R

Figure 4–1. IN+ and IN– Gain-Control Circuitry

Table 4–1. Gain Control (Analog Input Signal Required for

Full-Scale Bipolar A/D-Conversion 2s Complement)

†

CONTROL REGISTER 4

A/D CONVERSION

INPUT CONFIGURATION

DS03 DS02

ANALOG INPUT

‡

RESULT

0 0 All Squelch

Differential configuration

p

0 1 VID = ±3 V ±Full scale

Analog input= IN

+ – IN–

= AUX IN+ – AUX IN–

1 0 VID = ±1.5 V ±Full scale

AUX IN+ AUX IN

1 1 VID = ±0.75 V ±Full scale
0 0 All Squelch

Single-ended configuration

§

0 1 VI = ±1.5 V ±Half scale

Anal

og input= IN+ –

V

MID

= AUX IN+ – V

1 0 VI = ±1.5 V ±Full scale

= AUX IN+ V

MID

1 1 VI = ±0.75 V ±Full scale

†

VDD = 5 V

‡

VID = differential input voltage, VI = input voltage referenced to ADC V

MID

with IN – or AUX IN – connected to

ADC V

MID

. In order to minimize distortion, it is recommended that the analog input not exceed 0.1 dB below full scale.

§

For single-ended inputs, the analog input voltage should not exceed the supply rails. All single-ended inputs should be
referenced to the internal reference voltage, ADC V

MID

, for best common-mode performance.

4–2

D15 D14 D13 D12 D11 D2 D1 D0

t

f(SCLK)

0.8 V

SCLK

FS

†

t

r(SCLK)

t

d(CH-FH)

t

d(CH-FL)

0.8 V

2 V 2 V

t

d(CH-DOUT)

D15 D14 D13 D12 D11 D2 D1 D0

t

su(DIN)

t

h(DIN)

DOUT

‡

DIN

2 V

2 V

†

The time between falling edges of two primary FS signals is the conversion period.

‡

The data on DOUT are shifted out on the rising edge of the shift clock, and the data on DIN are shifted in on the falling
edge of the shift clock.

Figure 4–2. AIC Stand-Alone and Master-Mode Timing

D15 D14 D13 D12 D1 1 D2 D1 D0

2 V 2 V

t

f(SCLK)

0.8 V

SCLK

FS

†

t

r(SCLK)

t

c(SCLK)

§

2 V 2 V

t

d(CH-DOUT)

D15 D14 D13 D12 D1 1 D2 D1 D0

t

su(DIN)

t

h(DIN)

DOUT

‡

DIN

†

The time between falling edges of two primary FS signals is the conversion period.

‡

The data on DOUT are shifted out on the rising edge of the shift clock, and the data on DIN are shifted in on the falling
edge of the shift clock.

§

The high-to-low transition of FS

must must occur within ±1/4 of a shift-clock period around the 2-V level of the shift clock

for the codec mode.

Figure 4–3. AIC Slave and Codec Emulation Mode

4–3

t

d(CH-FL)

2.4 V

0.8 V

SCLK

0.8 V

FS

FSD

SCLK Period/2

NOTE A: Timing shown is for the TLC320AC01 operating as the master or as a stand-alone device.

Figure 4–4. Master or Stand-Alone FS and FSD Timing

t

d(FL-FDL)

0.8 V

0.8 V

FSD

FS

NOTE A: Timing shown is for the TLC320AC01 operating in the slave mode (FS and SCLK signals are generated

externally). The programmed data value in the FSD register is 0.

Figure 4–5. Slave FS to FSD Timing

t

d(CH-FDL)

0.8 V

2.4 V

0.8 V

SCLK

FSD

NOTE A: Timing shown is for the TLC320AC01 operating in the slave mode (FS and SCLK signals are generated

externally). There is a data value in the FSD register greater than 18 (decimal).

Figure 4 – 6. Slave SCLK to FSD Timing

4–4

0.8 V

2 V

SCLK

0.4 V

DOUT

2.4 V

0.4 V

2.4 VHi-Z

t

d(CH-DOUT)

Figure 4–7. DOUT Enable Timing From Hi-Z

0.8 V

2 V

0.8 V

SCLK

t

d(CH-DOUTZ)

Hi-Z

DOUT

Figure 4–8. DOUT Delay Timing to Hi-Z

2 V

2.4 V

MCLK

t

r(EH)

EOC

t

d(ML-EH)

Internal ADC

Conversion Time

t

f(EL)

t

d(ML-EL)

0.8 V

0.4 V 0.4 V

2.4 V

2 V

0.8 V

Figure 4–9. EOC Frame Timing

4–5

Delay Is m Shift Clocks

†

Delay Is m Shift Clocks

†

Delay Is m Shift Clocks

†

Master

FS

Master FSD,

Slave Device 1 FS

Slave Device 1 FSD,

Slave Device 2 FS

Slave Device 2 FSD,

Slave Device 3 FS

Slave Device

(n – 1) FSD

,

Slave Device n FS

†

The delay time from any FS signals to the corresponding FSD signals is m shift clocks with the value of m being the
numerical value of the data programmed into the FSD register. In the master mode with slaves, the same data word
programs the master and all slave devices; therefore, master to slave 1, slave 1 to slave 2, slave 2 to slave 3, etc., have
the same delay time.

Figure 4–10. Master-Slave Frame-Sync Timing After a Delay Has Been

Programmed Into the FSD Registers

1/2 Period

Sampling

Period

FSD
Value

MP MP MP

MP MP MPMS MS

MP MP MPSP SP

MP MP MPMS SP SPSP SS MS SS MS SS

t = 0 t = 1 t = 2

Master AIC
Only Primary
Frame Sync

FS

Master AIC
Only Primary
and Secondary
Frame Sync

FS

Master and Slave
AIC Primary
Frame Sync

FS

Master and Slave
AIC Primary and
Secondary
Frame Sync

FS

MP = Master Primary
MS = Master Secondary

SP = Slave Primary
SS = Slave Secondary

SP

Figure 4–11. Master and Slave Frame-Sync Sequence with One Slave

4–6

5–1

5 Typical Characteristics

01 2 3 4 5 6

Attenuation – dB

78910

–10

–20

–30

–40

–50

–60

0

TA = 25°C
FCLK = 144 kHz

fi – Input Frequency – kHz

ADC LOW-PASS RESPONSE

NOTE A : Absolute Frequency (kHz)

+

Normalized Frequency FCLK (kHz)

144

Figure 5–1

5–2

0

0 0.5 1 1.5 2 2.5 3

Attenuation – dB

0.2

0.4

0.5

3.5 4

0.3

0.1

–0.1

–0.2

–0.3

–0.4
–0.5

TA = 25°C
FCLK = 144 kHz

ADC LOW-PASS RESPONSE

fi – Input Frequency – kHz

NOTE A : Absolute Frequency (kHz

)

+

Normalized Frequency FCLK (kHz)

144

Figure 5–2

5–3

0.5

0.4

0.2

0.1
0

0.9

0.3

0123456

Time – ms

0.7

0.6

0.8

1

78910

TA = 25°C
FCLK = 144 kHz

fi – Input Frequency – kHz

ADC GROUP DELAY

NOTE A : Absolute Frequency (kHz)

+

Normalized Frequenc y FCLK (kHz)

144

Figure 5–3

5–4

012 34 5 6

Attenuation – dB

78

–10

0

–20

–30

–40

–50

–60

TA = 25°C
fs = 8 kHz
FCLK = 144 kHz

fi – Input Frequency – kHz

ADC BAND-PASS RESPONSE

NOTE A : Absolute Frequency (kHz)

+

Normalized Frequency FCLK (kHz)

144

Figure 5–4

5–5

0 0.5 1 1.5 2 2.5 3 3.5 4

–0.1

–0.2

–0.3
–0.4

–0.5

0

0.1

0.2

0.3

0.4

0.5

Attenuation – dB

TA = 25°C
fs = 8 kHz
FCLK = 144 kHz

fi – Input Frequency – kHz

ADC BAND-PASS RESPONSE

NOTE A : Absolute Frequency (kHz)

+

Normalized Frequency FCLK (kHz

)

144

Figure 5–5

5–6

0 50 100 150 200 250

–30

–25

–20

–15

–10

–5

–0

Attenuation – dB

TA = 25°C
fs = 8 kHz
FCLK = 144 kHz

fi – Input Frequency – kHz

ADC HIGH-PASS RESPONSE

NOTE A : Absolute Frequency (kHz)

+

Normalized Frequenc y FCLK (kHz)

144

Figure 5–6

5–7

0.5

0.4

0.2

0.1
0

0.9

0.3

01 2 34 5 6

Time – ms

0.7

0.6

0.8

1

7

8

TA = 25°C
fs = 8 kHz
FCLK = 144 kHz

ADC BAND-PASS GROUP DELAY

fi – Input Frequency – kHz

NOTE A : Absolute Frequency (kHz)

+

Normalized Frequency FCLK (kHz)

144

Figure 5–7

5–8

012345 6

DAC LOW-PASS RESPONSE

78910

–10

–20

–30

–40

–50

–60

0

Attenuation – dB

TA = 25°C
fs = 9.6 kHz
FCLK = 144 kHz

fi – Input Frequency – kHz

NOTE A : Absolute Frequency (kHz)

+

Normalized Frequency FCLK (kHz)

144

Figure 5–8

5–9

0

0 0.5 1 1.5 2 2.5 3

0.2

0.4

0.5

3.5 4

0.3

0.1

–0.1

–0.2

–0.3

–0.4
–0.5

Attenuation – dB

TA = 25°C
fs = 9.6 kHz
FCLK = 144 kHz

fi – Input Frequency – kHz

DAC LOW-PASS RESPONSE

NOTE A : Absolute Frequency (kHz)

+

Normalized Frequency FCLK (kHz)

144

Figure 5–9

5–10

0.5

0.4

0.2

0.1
0

0.9

0.3

0123456

Time – ms

0.7

0.6

0.8

1

78910

TA = 25°C
fs = 9.6 kHz
FCLK = 144 kHz

DAC LOW-PASS GROUP DELAY

fi – Input Frequency – kHz

NOTE A : Absolute Frequency (kHz)

+

Normalized Frequency FCLK (kHz)

144

Figure 5–10

5–11

Normalized Frequency

– 2

– 4

– 6

0 2 4 6 8 10 12

Magnitude – dB

0

2

4

14 16 18 20

TA = 25°C
Input = ± 3-V Sine Wave

DAC (sin x)/x CORRECTION FILTER RESPONSE

NOTE A : Absolute Frequency (kHz)

+

Normalized Frequency FCLK (kHz

)

288

Figure 5–11

5–12

Normalized Frequency

200

100

0

0 2 4 6 8 10 12

Group Delay –

300

400

500

14 16 18 20

sµ

TA = 25°C
Input = ± 3-V Sine Wave

DAC (sin x)/x CORRECTION FILTER RESPONSE

NOTE A : Absolute Frequency (kHz)

+

Normalized Frequency FCLK (kHz)

288

Figure 5–12

5–13

0

– 0.4

–1.2
–1.6

– 2

1.6

– 0.8

0123456

Magnitude – dB

0.8

0.4

1.2

2

78910

(sin x) /x Correction

Error

TA = 25°C
Input = ± 3-V Sine Wave

Normalized Frequency

19.2-kHz (sin x) /x
Distortion

DAC (sin x)/x CORRECTION ERROR

NOTE A : Absolute Frequency (kHz)

+

Normalized Frequency FCLK (kHz)

288

Figure 5–13

5–14

6–1

6 Application Information

TMS320C2x/3x

CLKOUT

DX
DR

FSX

FSR
CLKX
CLKR

TLC320AC01

MCLK
DIN
DOUT
FS

SCLK

5 V

0.1 µF

5 V

5 V

D

GND

A

GND

DAC V

DD

DAC V

MID

DAC GND

ADC V

DD

ADC V

MID

ADC GND

DGTL V

DD

DGTL GND

0.1 µF

0.1 µF

0.1 µF

0.1 µF

14
10

11

12

13

5

6

7

9

24

23

22

20

NOTE A: Terminal numbers shown are for the FN package.

Figure 6–1. Stand-Alone Mode (to DSP Interface)

TMS320C2x/3x

CLKOUT

DX
DR

FSX

FSR
CLKX
CLKR

TLC320AC01

MCLK
DIN
DOUT
FS

SCLK

14
10

11

12

13

NOTE A: Terminal numbers shown are for the FN package.

Figure 6–2. Codec Mode (to DSP Interface)

6–2

TMS320C2x/3x

CLKOUT

DX
DR

FSX

FSR
CLKX
CLKR

TLC320AC01

MCLK
DIN
DOUT
FS

SCLK

FSD

TLC320AC01

MCLK
DIN
DOUT
FS

SCLK

FSD

Master Mode

Slave Mode

14
10

11

12

13

14
10

11

12

13

NOTE A: Terminal numbers shown are for the FN package.

Figure 6–3. Master With Slave (to DSP Interface)

+

–

+

–

10 kΩ

10 kΩ

TLE2022

TLE2022

ADC V

MID

IN+

IN–

10 kΩ

10 kΩ

+

V

I

†

–

†

The VI source must be capable of sinking a current equal to [ADC V

MID

+ |VI|(max)]/10 kΩ.

Figure 6–4. Single-Ended Input (Ground Referenced)

6–3

+

–

+

–

10 kΩ

TLE2064

4

IN–

IN+

ADC V

MID

10 kΩ

10 kΩ

10 kΩ

10 kΩ

10 kΩ

+

–

TLE2064

4

TLE2064

4

V

I

†

†

The VI source must be capable of sinking a current equal to [(ADC V

MID

/2) + |VI|(max)]/10 kΩ.

Figure 6–5. Single-Ended to Differential Input (Ground Referenced)

OUT–

OUT+

600-Ω

Load

Figure 6–6. Differential Load

+

–

10 kΩ

TLE2062

OUT–
OUT+

600-Ω

Load

10 kΩ

10 kΩ

10 kΩ

5 V

– 5 V

NOTE A: When a signal changes from a single supply with a nonzero reference system to a

grounded load, the operational amplifier must be powered from plus and minus supplies
or the load must be capacitively coupled.

Figure 6–7. Differential Output Drive (Ground Referenced)

6–4

+

–

TLE2062

OUT+

OUT–

600-Ω
Load

+

–

TLE2062

Figure 6–8. Low-Impedance Output Drive

+

–

100 kΩ

TLE2062

OUT+

DAC V

MID

Load

100 kΩ

100 kΩ

100 kΩ

NOTE A: When a signal changes from a single supply with a nonzero reference system to a

grounded load, the operational amplifier must be powered from plus and minus supplies
or the load must be capacitively coupled.

600-Ω

5 V

– 5 V

Figure 6–9. Single-Ended Output Drive (Ground Referenced)

A–1

Appendix A

Primary Control Bits

The function of the primary-word control bits D01 and D00 and the hardware terminals FC0 and FC1 are
shown below. Any combinational state of D01, D00, FC1, and FC0 not shown is ignored.

CONTROL FUNCTION OF CONTROL BITS

BITS TERMINALS

D01 D00 FC1 FC0

0 0 0 0 On the next falling edge of FS, the AIC receives DAC data D15–D02 to DIN and

transmits the ADC data D15–D00 from DOUT.

0 0 0 1

On the next falling edge of FS, the AIC receives DAC data D15–D02 to DIN and
transmits the ADC data D15–D00 from DOUT.

The phase adjustment is determined by the state of FC1 and FC0 such that on the
next rising edge of the next internal FS

, the next ADC/DAC sampling time occurs later
by the number of MCLK periods equal to the value contained in the A′ register. When
the A′ register value is negative, the internal falling edge of FS

occurs earlier.

0 0 1 0

On the next falling edge of FS, the AIC receives DAC data D15 –D02 at DIN and
transmits the ADC data D15–D00 from DOUT.

The phase adjustment is determined by the state of FC1 and FC0 such that on the
rising edge of the next internal FS

, the next ADC/DAC sample time occurs earlier by
the number of MCLK periods determined by the value contained in the A′ register.
When the A′ register value is negative, the internal falling edge of FS

occurs later.

0 0 1 1

On the next falling edge of the primary FS, the AIC receives DAC data D15–D02 at
DIN and transmits the ADC data D15–D00 from DOUT.

When FC0 and FC1 are both taken high, the AIC initiates a secondary FS to receive
a secondary control word at DIN. The secondary frame sync occurs at 1/2 the
sampling time as measured from the falling edge of the primary FS

.

0 1 0 0

On the next falling edge of FS, the AIC receives DAC data D15 –D02 to DIN and
transmits the ADC data D15–D00 from DOUT.

The phase adjustment is determined by the state of D01 and D00 such that on the
next rising edge of FS

, the next ADC/DAC sampling time occurs later by the number
of MCLK periods determined by the value contained in the A′ register. When the A′
register value is negative, the falling edge of FS

occurs earlier.

1 0 0 0

On the next falling edge of FS, the AIC receives DAC data D15 –D02 at DIN and
transmits the ADC data D15–D00 from DOUT.

The phase adjustment is determined by the state of D01 and D00. On the next rising
edge of FS

, the next ADC/DAC sampling time occurs earlier by the number of MCLK
periods determined by the value contained in the A′ register. When the A′ register
value is negative, the internal falling edge of FS

occurs later.

1 1 0 0

On the next falling edge of FS, the AIC receives DAC data D15 –D02 to DIN and
transmits the ADC data D15–D00 from DOUT.

When D00 and D01 are both high, the AIC initiates a secondary FS to receive a
secondary control word at DIN. The secondary frame sync occurs at 1/2 the sampling
time as measured from the falling edge of the primary FS

.

A–2

CONTROL FUNCTION OF CONTROL BITS (Continued)

BITS TERMINALS

D01 D00 FC1 FC0

0 1 1 1

On the next falling edge of FS, the AIC receives DAC data D15–D02 to DIN and
transmits the ADC data D15–D00 from DOUT.

The phase adjustment is determined by the state of D01 and D00 such that on the
next rising edge of FS

, the next ADC/DAC sampling time occurs later by the number
of MCLK periods determined by the value contained in the A′ register. When the A′
register value is negative, FS

occurs earlier.

When FC0 and FC1 are both taken high, the AIC initiates a secondary FS to receive
a secondary control word at DIN. The secondary frame sync occurs at 1/2 the
sampling time as measured from the falling edge of the primary FS

.

1 0 1 1

On the next falling edge of FS, the AIC receives DAC data D15 –D02 at DIN and
transmits the ADC data D15–D00 from DOUT.

The phase adjustment is determined by the state of D01 and D00. On the next rising
edge of FS

, the next ADC/DAC sample time occurs earlier by the number of MCLK
periods determined by the value contained in the A′ register. When the A′ register
value is negative, FS

occurs later.

When FC0 and FC1 are both taken high, the AIC initiates a secondary FS to receive
a secondary control word at DIN. The secondary frame sync occurs at 1/2 the
sampling time as measured from the falling edge of the primary FS

.

1 1 1 1

On the next falling edge of the primary FS, the AIC receives DAC data D15–D02 at
DIN and transmits the ADC data D15–D00 from DOUT.

When FC1 and FC0 are both high or D01 and D00 are both high, the AIC initiates a
secondary FS

to receive a secondary control word at DIN. The secondary FS occurs

at 1/2 the sampling time measured from the falling edge of the primary FS

.

1 1 0 1

On the next falling edge of FS, the AIC receives DAC data D15 –D02 to DIN and
transmits the ADC data D15–D00 from DOUT.

When D00 and D01 are high, the AIC initiates a secondary FS to receive a secondary
control word at DIN. The secondary frame sync occurs at 1/2 the sampling time as
measured from the falling edge of the primary FS

.

The phase adjustment is determined by the state of FC1 and FC0 such that on the
next rising edge of FS

, the next ADC/DAC sampling time occurs later by the number
of MCLK periods determined by the value contained in the A′ register. When the A′
register value is negative, FS

occurs earlier.

1 1 1 0

On the next falling edge of FS, the AIC receives DAC data D15–D02 to DIN and
transmits the ADC data D15–D00 from DOUT.

When D00 and D01 are high, the AIC initiates a secondary FS to receive a secondary
control word at DIN. The secondary frame sync occurs at 1/2 the sampling time as
measured from the falling edge of the primary FS

.

The phase adjustment is determined by the state of FC1 and FC0 such that on the
next rising edge of FS

, the next ADC/DAC sampling time occurs later by the number
of MCLK periods determined by the value contained in the A′ register. When the A′
register value is negative, FS

occurs earlier.

1 1 1 1

On the next falling edge of FS, the AIC receives DAC data D15 –D02 at DIN and
transmits the ADC data D15–D00 from DOUT.

When FC1 and FC0 are both high or D01 and D00 are both high, the AIC initiates a
secondary FS

to receive a secondary control word at DIN. The secondary FS occurs

at 1/2 the sampling time measured from the falling edge of the primary FS

.

B–1

Appendix B

Secondary Communications

The function of the control bits DS15 and DS14 and the hardware terminals FC0 and FC1 are shown below.
Any combinational state of DS15, DS14, FC1, and FC0 not shown is ignored.

CONTROL FUNCTION OF SECONDARY COMMUNICATION

BITS TERMINALS

DS15 DS14 FC1 FC0

0 0 Ignored On the next falling edge of FS, the AIC receives DAC data D15–D02 at DIN and

transmits the ADC data D15–D00 from DOUT.

0 1 Ignored

On the next falling edge of the FS, the AIC receives DAC data D15–D02 at DIN and
transmits the ADC data D15–D00 from DOUT.

The phase adjustment is determined by the state of DS15 and DS14 such that on the
next rising edge of FS

, the next ADC/DAC sampling time occurs later by the number
of MCLK periods determined by the value contained in the A′ register. When the A′
register value is negative, FS

occurs earlier.

1 0 Ignored

On the next falling edge of FS, the AIC receives DAC data D15 –D02 at DIN and
transmits the ADC data D15–D00 from DOUT.

The phase adjustment is determined by the state of D01 and D00. On the next rising
edge of FS

, the next ADC/DAC sampling time occurs earlier by the number of MCLK
periods determined by the value contained in the A′ register. When the A′ register
value is negative, FS

occurs later.

1 1 0 0 On the next falling edge of FS, the AIC receives DAC data D15–D02 at DIN and

transmits the ADC data D15–D00 from DOUT.

1 1 0 1

On the next falling edge of the FS, the AIC receives DAC data D15–D02 at DIN and
transmits the ADC data D15–D00 from DOUT.

The phase adjustment is determined by the state of FC1 and FC0 such that on the
next rising edge of FS

, the next ADC/DAC sampling time occurs later by the number
of MCLK periods determined by the value contained in the A′ register. When the A′
register value is negative, FS

occurs earlier.

1 1 1 0

On the next falling edge of FS, the AIC receives DAC data D15 –D02 at DIN and
transmits the ADC data D15–D00 from DOUT.

The phase adjustment is determined by the state of FC1 and FC0 such that on the
next rising edge of FS

, the next ADC/DAC sampling time occurs earlier by the number
of MCLK periods determined by the value contained in the A′ register. When the A′
register value is negative, FS

occurs later.

1 1 1 1 On the next falling edge of FS, the AIC receives DAC data D15–D02 at DIN and

transmits the ADC data D15–D00 from DOUT.

B–2

C–1

Appendix C

TLC320AC01C/TLC320AC02C Specification Comparisons

T exas Instruments manufactures the TLC320AC01C and the TLC320AC02C specified for the 0°C to 70°C
commercial temperature range and the TLC320AC02I specified for the –40°C to 85°C temperature range.
The TLC320AC02C and TLC320AC02I operate at a relaxed TLC320AC01C specification. The differences
are listed in the following tables.

ADC Channel Signal-to-Distortion Ratio, VDD = 5 V, fs = 8 kHz (Unless
Otherwise Noted) (see Note 1)

AV = 0 dB AV = 6 dB AV = 12 dB

PARAMETER

TEST CONDITIONS

MIN MAX MIN MAX MIN MAX

UNIT

TLC320AC01

68 — —

TLC320AC02

V

I

= –6 dB to –1

dB

64 — —

TLC320AC01

63 68 —

TLC320AC02

V

I

= –

12 dB to –6 dB

59 64 —

TLC320AC01

57 63 68

TLC320AC02

V

I

= –18 dB to –12

dB

56 59 64

TLC320AC01

51 57 63

TLC320AC02

V

I

= –24 dB to –18

dB

50 56 59

TLC320AC01

45 51 57

dB

TLC320AC02

V

I

= –

30 dB to –24 dB

44 50 56

TLC320AC01

39 45 51

TLC320AC02

V

I

= –36 dB to –30

dB

38 44 50

TLC320AC01

33 39 45

TLC320AC02

V

I

= –42 dB to –36

dB

32 38 44

TLC320AC01

27 33 39

TLC320AC02

V

I

= –48 dB to –42

dB

26 32 38

NOTE 1: The analog-input test signal is a 1020-Hz sine wave with 0 dB = 6 V peak to peak as the reference level for

the analog input signal.

C–2

DAC Channel Signal-to-Distortion Ratio, VDD = 5 V, fs = 8 kHz (Unless
Otherwise Noted) (see Note 2)

AV = 0 dB AV = –6 dB AV = –12 dB

PARAMETER

TEST CONDITIONS

MIN MAX MIN MAX MIN MAX

UNIT

TLC320AC01

68 — —

TLC320AC02

V

O

= –

6 dB to 0 dB

64 — —

TLC320AC01

63 68 —

TLC320AC02

V

O

= –12 dB to –6

dB

59 64 —

TLC320AC01

57 63 68

TLC320AC02

V

O

= –18 dB to –12

dB

56 59 64

TLC320AC01

51 57 63

TLC320AC02

V

O

= –

24 dB to –18 dB

50 56 59

TLC320AC01

45 51 57

dB

TLC320AC02

V

O

= –30 dB to –24

dB

44 50 56

TLC320AC01

39 45 51

TLC320AC02

V

O

= –36 dB to –30

dB

38 44 50

TLC320AC01

33 39 45

TLC320AC02

V

O

= –

42 dB to –36 dB

32 38 44

TLC320AC01

27 33 39

TLC320AC02

V

O

= –48 dB to –42

dB

26 32 38

NOTE 2: The input signal, VI, is the digital equivalent of a 1020-Hz sine wave (full-scale analog output at full-scale digital

input = 0 dB). The nominal differential DAC channel output with this input condition is 6 V peak to peak. The
load impedance for the DAC output buffer is 600 Ω from OUT+ to OUT –.

C–3

System Distortion, ADC Channel Attenuation, VDD = 5 V, fs = 8 kHz,
FCLK = 144 kHz (Unless Otherwise Noted)

PARAMETER TEST CONDITIONS MIN MAX UNIT

TLC320AC01

70 dB

TLC320AC02

Second harmonic

Differential input

64 dB

TLC320AC01

(see Note 3)

70 dB

TLC320AC02

Third harmonic and higher harmonics

64 dB

NOTE 3: The input signal is a 1020 Hz-sine wave for the ADC channel. Harmonic distortion is defined for an input level

of –1 dB.

System Distortion, DAC Channel Attenuation, VDD = 5 V, fs = 8 kHz,
FCLK = 144 kHz (Unless Otherwise Noted)

PARAMETER TEST CONDITIONS MIN MAX UNIT

TLC320AC01

70 dB

TLC320AC02

Second harmonic

Differential output

64 dB

TLC320AC01

(see Note 4)

70 dB

TLC320AC02

Third harmonic and higher harmonics

64 dB

NOTE 4: The input signal is the digital equivalent of a 1020-Hz sine wave (digital full scale = 0 dB). The nominal

differential DAC channel output with this input condition is 6 V peak to peak. The load impedance for the DAC
output buffer is 600 Ω from OUT+ to OUT–. Harmonic distortion is specified for a signal input level of 0 dB.

C–4

D–1

Appendix D

Multiple TLC320AC01/02 Analog Interface Circuits on One

TMS320C5X DSP Serial Port

In many applications, digital signal processors (DSP) must obtain information from multiple analog-to-digital
(A/D) channels and transmit digital data to multiple digital-to-analog (D/A) conversion channels. The
problem is how to do it easily and efficiently.

This application report addresses the issue of connecting two channels of an analog interface circuit (AIC)
to one TMS320C5X DSP serial port. In this application report, the AIC is the TLC320AC01.

The TLC320AC01 (and TLC320AC02) analog interface circuit contains both A/D and D/A converters and
using the master/slave mode, it is possible to connect two of them to one TMS320C5X DSP serial port with
no additional logic. The hardware schematic is shown in Figure D–1.

D–2

TMS320C5x

CLKOUT

DX
DR

FSX

FSR
CLKX
CLKR

TLC320AC01

MCLK
DIN
DOUT
FS

SCLK

FSD

TLC320AC01

MCLK
DIN
DOUT
FS

SCLK

FSD

Master Mode

Slave Mode

14
10

11

12

13

14
10

11

12

13

NOTE A: Terminal numbers shown are for the FN package.

Figure D–1. Master With Slave (to DSP Interface)

HARDWARE AND SOFTWARE SOLUTION

Once the hardware connections are completed, the issue becomes distinguishing one channel from
another. Fortunately, this is very easy to do in software and adds very little overhead. The mode that the
AC01s run in is called master/slave mode. One AC01 is the master and all of the rest of the AC01s are
slaves. The master can be distinguished from all of the slaves by examining the least significant bit (LSB)
in the receive word coming from the AC01. The master has a 0 in the LSB and all of the slaves have a 1
in the LSB.

The AC01s in master/slave mode take turns communicating with the DSP serial port. They do this is a round
robin or circular fashion. Synchronizing the system involves looking for the master AC01 and then starting
the software associated with the first AC01. All other AC01s follow in order. It is possible to have different
software for each AC01.

A reference design was constructed using a TMS320C5X DSP starter kit (DSK). The AC01s were
connected to the TDM serial port which is available at the headers on the edge of the DSK.

A listing of the DSK assembly code for a simple stereo input/output program is included in the following
section.

D–3

SOFTWARE MODULE

MODULE NAME: INOUTB.ASM

In-out routine for C5X DSK with two TLC320AC01s on the
TDM serial port of the C5X in master/slave mode.

This version performs the in/out task for both the master
and slave TLC320AC01 in the receive interrupt service
routine.

*****************************************************************************

*******************

*****************************************************************************

*******************

* .mmregs

.ds 01000h
PR1 .word 0104h ;A register
PR2 .word 0219h ;B register
PR3 .word 0300h ;A prime register
PR4 .word 0405h ;amplifier gain register
PR5 .word 0501h ;analog configuration register
PR6 .word 0600h ;digital configuration register
PR7 .word 0730h ;frame synch delay register
PR8 .word 0802h ;frame synch number register
value .word 0800h
value2 .word 0800h
val_add .word 0200h
val_add2 .word 0400h

****************************************************************************

******

****************************************************************************

Set up the ISR vector

.ps 080ah
rint: B RECEIVE ; 0A; Serial port receive interrupt RINT.
xint: B TRANSMIT ; 0C; Serial port transmit interrupt XINT.
trint: B TDMREC
txint: B TDMTX

;
*

*****************************************************************************

******

*****************************************************************************

TMS320C5X INITIALIZATION

.ps 0a00h

.entry
START: SETC INTM ; Disable interrupts

LDP #0 ; Set data page pointer

OPL #0834h,PMST

LACC #0

SAMM CWSR

SAMM PDWSR

D–4

splk #00c8h

SPLK 082h,IMR

call AC01INIT

CLRC OVM ; OVM = 0

SPM 0 ; PM = 0

SPLK #042h,IMR ; TDMA ser port rec interrupt

SPLK #0C8h,TSPC ;

CLRC INTM ; enable interrupts

loop ; main program here does nothing.

nop ; a user program can be inserted.

b loop ;
;

end of main program ;

;
; TDM serial port receiver interrupt service routine
;
TDMREC:

; This loop insures that the master AC01
ldp #trcv ; is the first one that is written to in the
bit trcv,15 ; loop. the slave AC01(s) will follow in
bcnd xxx,tc ; sequential order. The master AC01 has a

; 0 in the 1sb. the slave AC01(s) have a 1

; in the 1sb of the receive word.
ldp #trcv
lacc trcv
and #0fffch

;

; user code would go here for master AC01

;
sacl tdxr
b yyy

xxx

ldp #trcv
lacc trcv
and #0fffch

;

; user code would go here for slave AC01

;
sacl tdxr

yyy

rete

D–5

;
; TDM serial port transmit interrupt service routine
;
TDMTX:

rete

;
; RECEIVER INTERRUPT SERVICE ROUTINE
;
RECEIVE:

rete

TRANSMIT:

RETE

D–6

AC01INIT

SPLK #020h,TCR
SPLK #01h,PRD
MAR *,AR0
LACC #0008h
SACL TSPC
LACC #00c8h
SACL TSPC
SETC SXM

;

LDP #PR1
LACC PR1
CALL AC01_2ND

;

LDP #PR2
LACC PR2
CALL AC01_2ND

;

LDP #PR8
LACC PR8
CALL AC01_2ND

;

LDP #PR7
LACC PR7
CALL AC01_2ND

ret

AC01_2ND:

LDP #0
SACH TDXR ;
CLRC INTM
IDLE
ADD #6h, 15 ; 0000 0000 0000 0011 XXXX XXXX XXXX XXXX b
SACH TDXR ;
IDLE
SACL TDXR ;
IDLE
LACL #0 ;
SACL TDXR ; make sure the word got sent
IDLE
SETC INTM ;
RET

D–7

E–1

Appendix E

Mechanical Data

PLASTIC J-LEADED CHIP CARRIER

FN/S-PQCC-J**

4040005/A–07/93

20-PIN SHOWN

0.048 (1,22)

0.042 (1,07)

× 45°

1319

4

8

913

14

18

D3/E

3

D2/E

2

0.020 (0,51) MIN

0.120 (3,05) MAX

0.180 (4,57) MAX

0.050 (1,27) TYP

D

D

1

E

1

E

JEDEC

OUTLINE PINS**

NO. OF

D/E

MIN MAX

MO-047AA

20

0.385

(9,78)

0.395

(10,03)

0.350
(8,89)

0.356
(9,04)

0.456

(11,58)

0.450

(11,43)

0.495

(12,57)

0.485

(12,32)

28

MO-047AB

44

MO-047AC

52

MO-047AD

0.390

(9,91)

0.430

(10,92)

0.300
(7,62)

0.200
(5,08)

0.330

(8,38)

0.290
(7,34)

0.890

(22,61)

0.930

(23,62)

0.800

(20,32)

1.000

(25,40)

1.130

(28,70)

1.090

(27,69)

MO-047AF 84

1.185

(30,10)

1.195

(30,35)

1.150

(29,21)

1.158

(29,41)

0.956

(24,28)

0.950

(24,13)

0.995

(25,27)

0.985

(25,02)

68MO-047AE

0.500

(12,70)

0.630

(16,00)

0.590

(14,99)

0.685

(17,40)

0.695

(17,65)

0.650

(16,51)

0.656

(16,66)

0.600

(15,24)

0.730

(18,54)

0.690

(17,53)

0.785

(19,94)

0.795

(20,19)

0.750

(19,05)

0.756

(19,20)

D2/E

2

D3/E

3

D1/E

1

MIN MAX MIN MAX TYP

NOTES: A. All linear dimensions are in inches (millimeters).

B. This drawing is subject to change without notice.
C. Dimensions D1 and E1 do not include mold flash or protrusion. Protrusion shall not exceed 0.010 (0,25)

on any side.
D. All dimensions conform to JEDEC Specification MO-047.
E. Maximum deviation from coplanarity is 0.004 (0,10).

E–2

4040152/A–07/93

0,70
0,30

11,80

12,20

48 33

49

64

116

32

17

Pin # 1
Indicator

10,10

9,90

0,50 TYP

0,00 MIN

PLASTIC QUAD FLAT PACKAGEPM/S-PQFP-G64

SQ

SQ

7,50 SQ TYP

0,147

0,177

0,14

0,26

1,70 MAX

0°–10°

Seating Plane

1,30

1,50

NOTES: A. All linear dimensions are in millimeters.

B. This drawing is subject to change without notice.
C. Maximum deviation from coplanarity is 0,08 mm.
D. Body dimensions do not include mold flash or protrusion.

IMPORTANT NOTICE

T exas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
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pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. T esting and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.

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DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
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BE FULLY AT THE CUSTOMER’S RISK.

In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.

TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
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Copyright  1998, Texas Instruments Incorporated