Texas Instruments TWL1103PBSR, TWL1103PBS Datasheet

TWL1103

VOICE-BAND AUDIO PROCESSOR (VBAP)

SLVS259 – NOVEMBER 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

2.7-V Operation

Two Differential Microphone Inputs, One Differential Earphone Output, and One Single-Ended Earphone Output

Programmable Gain Amplifiers for Transmit, Receive, Sidetone, and Volume Control

Earphone Mute and Microphone Mute

On-chip I2C-Bus, Which Provides a Simple, Standard, Two-Wire Serial Interface With Digital ICs

Programmable for 15-Bit Linear Data or 8-Bit Companded (µ-Law or A-Law) Data

Available in a 32-Terminal TQFP Package

Designed for Analog and Digital Wireless Handsets and Telecommunications Applications

Dual-Tone Multi-Frequency (DTMF) and Single Tone Generator

Pulse Density Modulated (PDM) Buzzer Output

description

The voice-band audio processor (VBAP) is designed to perform the transmit encoding analog/digital (A/D) conversion and receive decoding digital/analog (D/A) conversion, together with transmit and receive filtering for voice-band communications systems. The device operates in either the 15-bit linear or 8-bit companded (µ-law or A-Law) mode, which is selectable through the I

C interface. From a 2.048-MHz master clock input,

the VBAP generates its own internal clocks.

PBS PACKAGE

(TOP VIEW)

PCMO PCMI DV

SCL SDA NC NC

PLLV

EARV

EAR1ON

EARV

EAR1OP

EARV

EAR2O

MBIAS

MIC1P

MIC1N

MIC2P

1234567 8

24 23 22 21 20 19 18 17

MIC2N

REXT

MCLK

PLLV

RESET

PWRUPSEL

BUZZCON

PCMSYN

PCMCLK

NC – No internal connection

This device contains circuits to protect its inputs and outputs against damage due to high static voltages or electrostatic fields. These circuits have been qualified to protect this device against electrostatic discharges (ESD) of up to 2 kV according to MIL-STD-883C, Method 3015; however, it is advised that precautions be taken to avoid application of any voltage higher than maximum-rated voltages to these high-impedance circuits. During storage or handling, the device leads should be shorted together or the device should be placed in conductive foam. In a circuit, unused inputs should always be connected to an appropriated logic voltage level, preferably either VCC or ground. Specific guidelines for handling devices of this type are contained in the publication

Guidelines for

Handling Electrostatic-Discharge-Sensitive (ESDS) Devices and Assemblies

available from Texas Instruments.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

VBAP is a trademark of Texas Instruments Incorporated.

TWL1103 VOICE-BAND AUDIO PROCESSOR (VBAP)

SLVS259 – NOVEMBER 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

functional block diagram

PCMIN

PCMSYN

PCMCLK

MIC1P

MIC1N

MIC2P

MIC2N

MIC

Amplifier

g =

23.5 dB

MIC

Amplifier

g = 12 dB

0 dB

Analog

Modulator

TX Filter

and PGA

g = –10 dB

0 dB

PCM

Interface

Sidetone

g = –24 dB

–12 dB

RX Vol

Control

g = –18 dB

0 dB

RX Filter

and PGA

g = –6 dB

+6 dB

Digital

Modulaor

and Filter

Ear

Amp1

Ear

Amp2

DTMF

Generator

Control Bus

I/F

REF PLL

Buzzer

Control

Power and RESET

SCLK

SDATA

MBIAS

REXT

MCLK

RESET

EARV

PLLV

PWRUPSEL

PCMOUT

EAR1OP

EAR1ON

EAR2O

BUZZCON

TWL1103

VOICE-BAND AUDIO PROCESSOR (VBAP)

SLVS259 – NOVEMBER 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

functional description

power-on/reset

The power for the various digital and analog circuits is separated to improve the noise performance of the device. An external reset must be applied to the active low RESET terminal to guarantee reset upon power on. After the initial power-on sequence the TWL1103 can be functionally powered up and down by writing to the power control register through the I

C interface. There is a hardwired terminal selectable power up in default mode option. The PWRUPSEL function allows the VBAP to power up in the default mode and allows use without a microcontroller.

reference

A precision band gap reference voltage is generated internally and supplies all required voltage references to operate the transmit and receive channels. The reference system also supplies bias voltage for use with an electret microphone at terminal MBIAS. An external precision resistor is required for reference current setting at terminal REXT.

control interface

The I

C interface is a two-wire bidirectional serial interface that controls the VBAP by writing data to six control registers: 1) power control, 2) mode control, 3) transmit PGA and sidetone control, 4) receive PGA gain and volume control, 5) DTMF high tone, 6) DTMF low tone.

There are two power-up modes which may be selected at the PWRUPSEL terminal: 1) The PWRUPSEL state (Vdd at terminal 20) causes the device to power up in the default mode when power is applied. In the default mode the I

C interface is not required and the device may be used without an I2C interface. The programmable functions will be fixed at the default modes. 2) The PWRUPSEL state (ground at terminal 20) causes the device to go to a power-down state when power is applied. In this mode an I2C interface is required to power up the device.

phase-locked loop

The internal digital filters and modulators require a 10.24-MHz clock that is generated by phase locking to the

2.048-MHz master clock input.

PCM interface

The PCM interface transmits and receives data at the PCMO and PCMI terminals respectively. The data is transmitted or received at the PCMCLK speed once every PCMSYN cycle. The PCMCLK may be tied directly to the 2.048-MHz master clock (MCLK). The PCMSYN can be driven by an external source or derived from the master clock and used as an interrupt to the host controller.

microphone amplifiers

The microphone input is a switchable interface for two differential microphone inputs. The first stage is a low noise differential amplifier that provides a gain of 23.5 dB. The second stage amplifier has a selectable gain of 0 dB or 12 dB.

analog modulator

The transmit channel modulator is a third-order sigma-delta design.

transmit filter and PGA

The transmit filter is a digital filter designed to meet CCITT G.714 requirements. The device operates in either the 15-bit linear or 8-bit companded µ-law or A-law mode that is selectable through the I

C interface. The

transmit PGA defaults to 0 dB.

TWL1103 VOICE-BAND AUDIO PROCESSOR (VBAP)

SLVS259 – NOVEMBER 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

functional description (continued)

sidetone

A portion of the transmitted audio is attenuated and fed back to the receive channel through the sidetone path. The sidetone path defaults to –12 dB. The sidetone path can be enabled by writing to the power control register.

receive volume control

The receive volume control block acts as an attenuator with a range of –18 dB to 0 dB in 2 dB steps for control of the receive channel volume. The receive volume control gain defaults to 0 dB.

receive filter and PGA

The receive filter is a digital filter that meets CCITT G.714 requirements with a high-pass filter that is selectable through the I

C interface. The device operates in either the 15-bit linear or 8-bit µ-law or A-law companded mode, which is selectable through the I2C interface. The gain defaults to –1 dB representing a 3 dBm0 level for a 32 Ω

load impedance and the corresponding digital full scale PCMI code. The gain may be set to –2 dB

for the respective 3 dBm0 level for a 16 Ω load impedance.

digital modulator and filter

The second-order digital modulator and filter convert the received digital PCM data to the analog output required by the earphone interface.

earphone amplifiers

The analog signal can be routed to either of two earphone amplifiers, one with differential output (EAR1ON and EAR1OP) and one with single-ended output (EAR2O). Clicks and pops are suppressed for EAR1 differential output only.

tone generator

The tone generator provides generation of standard DTMF tones and single tone frequencies which are output to the following: 1) The buzzer driver, as a pulse density modulation (PDM) signal. 2) The receive path digital/analog converter (D/A), for outputting through the earphone. There are 255 possible single tones. The tone integer value is determined by the following formula Round (Tone Freq (Hz)/7.8135 Hz). The value is loaded into one of two 8-bit registers, the high tone register [04}or the low tone register {05}. The tone output is 2 dB higher when applied to the high tone register {04}. When generating DTMF tones the high DTMF tone must be applied to the high tone register, and the low frequency tone to the low tone register.

TWL1103

VOICE-BAND AUDIO PROCESSOR (VBAP)

SLVS259 – NOVEMBER 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Terminal Functions

TERMINAL

NO.

I/O DESCRIPTION

NAME

PFB

32 I Analog positive power supply

8 I Analog negative power supply BUZZCON 19 O Buzzer output, a pulse-density modulated signal to apply to external buzzer driver DV

13 I Digital positive power supply

14 I Digital negative power supply EAR1ON 27 O Earphone 1 amplifier output (–) EAR1OP 29 O Earphone 1 amplifier output (+) EAR2O 31 O Earphone 2 amplifier output EARV

28 I Analog positive power supply for the earphone amplifiers EARV

30, 26 I Analog negative power supply for the earphone amplifiers MBIAS 1 O Microphone bias supply output, no decoupling capacitors MCLK 22 I Master system clock input (2.048 MHz) (digital) MIC1P 2 I MIC1 input (+) MIC1N 3 I MIC1 input (–) MIC2P 4 I MIC2 input (+) MIC2N 5 I MIC2 input (–) PCMI 15 I Receive PCM input PCMO 16 O Transmit PCM output PCMSYN 18 I PCM frame sync PCMCLK 17 I PCM data clock PLLV

24 I PLL negative power supply

PLLV

25 I PLL digital power supply

PWRUPSEL 20 I Selects the power-up default mode REXT 6 I/O Internal reference current setting terminal – use precision 100-kΩ resistor and no filtering capacitors RESET 21 I Active low reset SCL 12 I I2C-bus serial clock – this input is used to synchronize the data transfer from and to the VBAP SDA 11 I/O I2C-bus serial address/data input/output – this is a bidirectional terminal used to transfer register control

addresses and data into and out of the CODEC. It is an open

-drain terminal and therefore requires a pull-up

resistor to VDD (typical 10 kΩ for 100 kHz)

23 I Ground return for bandgap internal reference

TWL1103 VOICE-BAND AUDIO PROCESSOR (VBAP)

SLVS259 – NOVEMBER 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

†

Supply voltage range –0.5 V to 4 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output voltage range –0.5 V to 4 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range –0.5 V to 4 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous total power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free air temperature range (industrial temperature) –40°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, testing –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm 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.

DISSIPATION RATING TABLE

PACKAGE

TA ≤ 25°C

POWER RATING

DERATING FACTOR

ABOVE TA = 25°C

TA = 85°C

POWER RATING

PBS 680 mW 6.8 mW/°C 270 mW

recommended operating conditions (see Notes 1 and 2)

MIN NOM MAX UNIT

Supply voltage, AVDD, DVDD, PLLVDD, EARV

2.7 3.3 V

High-level input voltage (V

IHMIN

) 0.7 x V

Low-level input voltage (V

ILMAX

) 0.3 x V

Load impedance between EAR1OP and EAR1ON-R

16 to 32 Ω

Load impedance for EAR2OP-R

32 Ω

Operating free-air temperature, T

–40 85

NOTES: 1. To avoid possible damage and resulting reliability problems to these CMOS devices, the power-on initialization paragraph should

be followed, described in the Principles of Operations.

2. Voltages are with respect to AVSS, DV

SS,

PLLVSS

and

EARV

SS.

TWL1103

VOICE-BAND AUDIO PROCESSOR (VBAP)

SLVS259 – NOVEMBER 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

electrical characteristics at 2.7 V and 25° C (unless otherwise noted) supply current

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Operating, EAR1 selected, MicBias disabled 6 7 mA Operating, EAR2 selected, MicBias disabled 5.4 6 mA

I Supply current from V

Power down, Reg 2 bit 7 = 1, MClk not present (see Note 3)

0.5 10 µA

Power down, Reg 2 bit 7 = 0, MClk not present (see Note 3)

25 40 µA

on(i)

Power-up time from power down 5 10 ms

NOTE 3: V

IHMIN

= VDD, V

ILMAX

= V

digital interface

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

High-level output voltage PCMO and BuzzCon IOH = –3.2 mA, VDD = 3 V DV

Low-level output voltage PCMO and BuzzCon IOL = 3.2 mA, VDD = 3 V 0 V

High-level input current, any digital input VI = V

10 µA

Low-level input current, any digital input VI = V

10 µA

Input capacitance 10 pF

Output capacitance 20 pF

Load impedance (BuzzCon) 5 kΩ

microphone interface

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Input offset voltage at MIC1N, MIC2N See Note 4 –5 5 mV

Input bias current at MIC1N, MIC2N –200 200 nA

Input capacitance at MIC1N, MIC2N 5 pF

Microphone input referred noise, psophometric weighted, (C-message weighted is similar)

Micamp 1 gain = 23.5 dB Micamp 2 gain = 0 dB

3.0 7.7 µV

rms

IOmax Output source current – MBIAS 1 1.2 mA V(

mbias)

Microphone bias supply voltage (see Note 5) 2.4 2.5 2.55 V MICMUTE –80 dB Input impedance Fully differential 35 60 100 kΩ

NOTES: 4. Measured while MIC1P and MIC1N are connected together. Less than 5 mV offset results in 0 value code on PCMOUT .

5. Not a JEDEC symbol.

speaker interface

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

VDD = 2.7 V , fully differential, 16-Ω load, 3-dBm0 output, RGXPA = –2 dB

120.9 151.1 mW

Earphone AMP1 output power ( See Note 6)

VDD = 2.7 V , fully differential, 32-Ω load, 3-dBm0 output, RGXPA = –1 dB

76.1 95.1 mW

Earphone AMP2 output power ( See Note 6)

VDD = 2.7 V, single ended, 32-Ω load, 3-dBm0 output

10 12.5 mW

Output offset voltage at EAR1 Fully differential ± 5 ±30 mV

3-dBm0 input, 16-Ω load 86.9 108.6

IOmax

Maximum output current for EAR1(rms)

3-dBm0 input, 32-Ω load 48.7 60.8

mA Maximum output current for EAR2 (rms) 3-dBm0 input 17.7 22.1 EARMUTE –80 dB

NOTE 6: Maximum power is with a load impedance of –25%.

TWL1103 VOICE-BAND AUDIO PROCESSOR (VBAP)

SLVS259 – NOVEMBER 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

electrical characteristics at 2.7 V and 25° C (unless otherwise noted) (continued) transmit gain and dynamic range, companded mode (µ-law or A-law) or linear mode selected, transmit slope

filter bypassed (see Notes 7 and 8)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Transmit reference-signal level (0dB) Differential 175 mV

Differential, normal mode 248 mV

Overload-signal level (3 dBm0)

Differential, extended mode 63 mV

Absolute gain error 0 dBm0 input signal, VDD = 2.7 V (minimum) –1 1 dB

MIC1N, MIC1P to PCMO at 3 dBm0 to –30 dBm0 –0.5 0.5

Gain error with input level relative to gain at –

MIC1N, MIC1P to PCMO at –31 dBm0 to –45 dBm0 –1 1

–10

dBm0 MIC1N, MIC1P to PCMO

MIC1N, MIC1P to PCMO at –46 dBm0 to –55 dBm0 –1.2 1.2

NOTES: 7. Unless otherwise noted, the analog input is 0 dB, 1020-Hz sine wave, where 0 dB is defined as the zero-reference point of the channel

under test.

8. The reference signal level, which is input to the transmit channel, is defined as a value 3 dB below the full-scale value of 88-mV

rms

transmit gain and dynamic range, companded mode (µ-law or A-law) or linear mode selected, transmit slope filter enabled (see Notes 9 and 10)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Transmit reference-signal level (0dB) Differential 175 mV

Differential, normal mode 248 mV

Overload-signal level (3 dBm0)

Differential, extended mode 63 mV

Absolute gain error 0 dBm0 input signal, VDD = 2.7 V (minimum) –1 1 dB

MIC1N, MIC1P to PCMO at 3 dBm0 to –30 dBm0 –0.5 0.5

Gain error with input level relative to gain at –

MIC1N, MIC1P to PCMO at –31 dBm0 to –45 dBm0 –1 1

–10

dBm0 MIC1N, MIC1P to PCMO

MIC1N, MIC1P to PCMO at –46 dBm0 to –55 dBm0 –1.2 1.2

NOTES: 9. Unless otherwise noted, the analog input is 0 dB, 1020-Hz sine wave, where 0 dB is defined as the zero-reference point of the channel

under test.

10. The reference signal level, which is input to the transmit channel, is defined as a value 3 dB below the full-scale value of 88-mV

rms

transmit filter transfer, companded mode (µ-law or A-law) or linear mode selected, transmit slope filter bypassed, external high pass filter bypassed (MCLK = 2.048 MHz)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

MIC1

or f

MIC2

<100 Hz –0.5 0.5

MIC1

or f

MIC2

= 200 Hz –0.5 0.5

MIC1

or f

MIC2

= 300 Hz to 3 kHz –0.5 0.5

Gain relative to input signal gain at 1020 Hz, internal high-pass

MIC1

or f

MIC2

= 3.4 kHz –1.5 0

filter disabled

MIC1

or f

MIC2

= 4 kHz –14

MIC1

or f

MIC2

= 4.6 kHz –35

MIC1

or f

MIC2

= 8 k Hz –47

Gain relative to input signal gain at 1020 Hz, internal high-pass

MIC1

or f

MIC2

<100 Hz –15

gg , g

filter enabled.

MIC1

or f

MIC2

= 200 Hz –5

TWL1103

VOICE-BAND AUDIO PROCESSOR (VBAP)

SLVS259 – NOVEMBER 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

electrical characteristics at 2.7 V and 25° C (unless otherwise noted) (continued) transmit filter transfer, companded mode (µ-law or A-law) or linear mode selected, transmit slope filter

selected (MCLK = 2.048 MHz) (see Note 11)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

MIC1

or f

MIC2

=100 Hz –27 dB

MIC1

or f

MIC2

= 200 Hz –8 dB

MIC1

or f

MIC2

= 250 Hz –4 dB

MIC1

or f

MIC2

= 300 Hz –1.80 dB

MIC1

or f

MIC2

= 400 Hz –1.50 dB

MIC1

or f

MIC2

= 500 Hz –1.30 dB

MIC1

or f

MIC2

= 600 Hz –1.1 dB

MIC1

or f

MIC2

= 700 Hz –0.8 dB

MIC1

or f

MIC2

= 800 Hz –0.57 dB

MIC1

or f

MIC2

= 900 Hz –0.25 dB

MIC1

or f

MIC2

= 1000 Hz 0 dB

Gain relative to input signal gain at 1000 H

z, w

ith slope filter selected

MIC1

or f

MIC2

= 1500 Hz 1.8 dB

MIC1

or f

MIC2

= 2000 Hz 4.0 dB

MIC1

or f

MIC2

= 2500 Hz 6.5 dB

MIC1

or f

MIC2

= 3000 Hz 7.6 dB

MIC1

or f

MIC2

= 3100 Hz 7.7 dB

MIC1

or f

MIC2

= 3300 Hz 8.0 dB

MIC1

or f

MIC2

= 3500 Hz 6.48 dB

MIC1

or f

MIC2

= 4000 Hz –13 dB

MIC1

or f

MIC2

= 4500 Hz –35 dB

MIC1

or f

MIC2

= 5000 Hz –45 dB

MIC1

or f

MIC2

= 8000 Hz –50 dB

NOTE 11: The pass-band tolerance is ± 0.25 dB from 300 Hz to 3500 Hz.

transmit idle channel noise and distortion, companded mode (µ-law or A-law) selected, slope filter bypassed

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Transmit idle channel noise, psophometrically weighted

TXPGA gain= 0 dB, micamp 1 gain = 23.5 dB, micamp 2 gain = 0 dB

–86.6 –78 dBm0

MIC1N, MIC1P to PCMO at 3 dBm0 27 MIC1N, MIC1P to PCMO at 0 dBm0 30 MIC1N, MIC1P to PCMO at –5 dBm0 33

Transmit signal-to-distortion ratio with

MIC1N, MIC1P to PCMO at –10 dBm0 36

1020-Hz sine-wave input

MIC1N, MIC1P to PCMO at –20 dBm0 35

MIC1N, MIC1P to PCMO at –30 dBm0 26 MIC1N, MIC1P to PCMO at –40 dBm0 24 MIC1N, MIC1P to PCMO at –45 dBm0 19

Intermodulation distortion, 2-tone CCITT method,

CCITT G.712 (7.1), R2 49

composite power level, –13 dBm0

CCITT G.712 (7.2), R2 51

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