ANALOG DEVICES AD1988B Service Manual

High Definition Audio SoundMAX® Codec

FEATURES

Ten 192 kHz DACs

Five independent stereo DAC pairs

7.1 surround sound plus independent headphone Independent 8 kHz, 11.025 kHz, 16 kHz, 22.05 kHz, 32 kHz,

44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, and 192 kHz sample rates Selectable stereo mixer on outputs 16-, 20-, and 24-bit PCM resolution

Six 192 kHz ADCs

Three independent stereo ADC pairs Simultaneous record of up to three stereo channels Support for quad microphone arrays plus independent capture channel Independent 8 kHz, 11.025 kHz, 16 kHz, 22.05 kHz, 32 kHz,

44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, and 192 kHz sample rates 16-, 20-, and 24-bit resolution

S/PDIF output

44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, and 192 kHz sample rates 16-, 20-, and 24-bit data widths PCM, WMA/PRO, Dolby®, AC3, and DTS® formats Digital PCM gain control Digital PCM ADC/stream mixer

S/PDIF input

44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, and 192 kHz sample rates 16-, 20-, and 24-bit data widths PCM, WMA/PRO, Dolby, AC3, and DTS formats Digital PCM gain control

Auto synchronizes to source High quality stereo CD input with GND sense MONO_OUT pin for internal speakers or telephony Retasking jack support

AD1988A/AD1988B

ENHANCED FEATURES

Three stereo headphone amps AD1988A: Windows Vista™ Operating System Premium Logo

compliant 95 dB outputs

90 dB audio inputs AD1988B: Windows Vista Premium Logo compliant and Dolby Master Studio™ compliant

101 dB outputs

92 dB audio inputs Internal 32-bit arithmetic for greater accuracy Impedance and presence detection on all jacks Analog PCBEEP and digital synthesis BEEP C/LFE channel swap Two general-purpose digital I/O (GPIO) pins

3.3 V analog and digital supplies Reduced support components Advanced power management modes 48-pin LQFP and LFCSP_VQ package options, Pb-free Supports Andrea Active Noise Reduction headphones Hardware volume control Built-in microphone gain amps Adjustable microphone bias pins

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.

AD1988A/AD1988B

REVISION HISTORY

10/06—Revision 0: Initial Version

Clarification of Output Configurations .................................. 11

HD Audio Widgets......................................................................... 12

Jack Presence Detection................................................................. 18

HD Audio Style Jack Presence Detection ............................... 18

Hardware Volume Control............................................................ 19

Outline Dimensions....................................................................... 20

Ordering Guide .......................................................................... 20

Rev. 0 | Page 2 of 20

AD1988A/AD1988B

R

FUNCTIONAL BLOCK DIAGRAM

SYNC

ESET#

BITCLK

DVIO

DVDD

DVFILT

DVSS

NID:07

24 bit

32-192 kHz

PCM / Digital

S/PDIF RX

NID:1D

0(01)

M

Σ

1(0B)

M

DAC_ 4

24 bit 192 kHz PCM Σ∆ DAC

24 bit

H D

A U D

192 kHz PCM Σ∆ DAC

24 bit 192 kHz PCM Σ∆ DAC

I

O

I

SDI

N

SDO

T E

GPIO

Volume Control

NID:1F

HW

Digital

A

-58.5 to0 dB

Digital

A

-58.5 to 0 dB

Digital

A

-58.5 to0 dB

Digital

A

-58.5 to0 dB

Digital

A

-58.5 to0 dB

GPIO _1

DAC_ 3 NID:06

DAC_ 2 NID:05

DAC_ 1 NID:04

DAC_ 0 NID:03

NID:0A

GPIO _0 / Volume

NID:02

24 bit 32-192 kHz PCM / Digital S/PDIF TX

R F A C E

NID:0B

Selector

3:1

0(08)

2(0F)

+1.5V +/-10 %

(AD19 88L15 )

+3.3V +/-10 %

(AD19 88L33 )

+3.3V +/-10 %

+1.8V

1(09)

ADC_ 0 NID:08

24 bit 192 kHz PCM Σ∆ AD C

ADC_ 1 NID:09

24 bit 192 kHz PCM Σ∆ AD C

+5%

-20%

ADC_ 2 NID:0F

24 bit 192 kHz PCM Σ∆ AD C

ADCS E L_0

NID:0C

Digital/

Analog

GM

-58.5 to +2 2. 5dB

ADCS E L_1

NID:0D

Digital/

Analog

GM

-58.5 to +2 2. 5dB

ADCS E L_2

NID:0E

Digital/

Analog

GM

-58.5 to +2 2. 5dB

Sele cto r 10:1

9(20-Mixer)

7(25–Port-H)

6(24–Port-G)

3 (3B – Port-F)

8(3D–Port-D)

Sele cto r

0(38–Port-A)

10:1

1(39–Port-B)

4(3C–Port-E)

2(3A–Port-C)

5(18-CD)

NID: 20

GAM

Digital

GAM

Input_En

-34. 5 to +12 dB

Digital AM

-58.5 to0 dB

Mixer Power

Control

NID:19

GAMGAM

3

5

2

1

Σ

4

0

7

6

GAM

7 (1A- PCBeep)

6(18 -CD)

Output_En

5(3B–Port-F)

-34.5to +12dB

NID:1C

ZGPIO_1

NID:1B

NID:21

AM

-46. 5 to 0 dB

3(3D–Port-D)

GAM

S/PDIF In / GPIO_1

S/PDIF OutZ

2(38–Port-A)

1(33–Port-C/H/G)

4(34–Port-E/H/G)

0(39–Port-B)

NID:33

NID:34

0(03)

1(04)

3:1

2(06)

NID:37

0(03)

1(04)

3:1

2(24)

1(25)

3:1

0(3A)

2(24)

1(25)

3:1

0(3C)

2(06)

NID:36

NID:30

0(03)

1(04)

3:1

2(06)

NID:32

0(05)

2:1

1(04)

NID:31

0(04)

2:1

1(0A)

Digital Beep AM

Figure 1. Block Diagram

MIC Bias R egulator

NID:35

Power Control

VREF

NID:23

Power Control

0(0A)

1(21)

0(06)

1(21)

0(05)

1(21)

0(04)

1(21)

0(37)

1(21)

0(36)

1(21)

0(30)

1(21)

0(32)

1(21)

0(31)

NID:10

-45.0 to0dB 3dBSteps

AVSS

AVDD+3.3V+/-5%

MIC_BI AS_FILT

VREF_FI LT

NID:28

M

Σ

M

NID:2A

M

Σ

M

Boost

NID: 3B

NID:27

M

Σ

M

NID:29

M

Σ

M

Boost

NID: 3D

NID:22

M

Σ

M

Boost

NID: 38

NID:1E

M

NID:2D

Σ

Σ A

Stereo

Down-Mix

NID:2B

Σ

M

Boost

NID: 39

NID:26

M

Σ

M

Boost

NID: 3C

NID:2C

M

Σ

M

Boost

NID: 3A

MPORT-HZ

BIAS Z

MPORT-FZ

M

Z

EN

BIAS / EAPD

HP

M

AMP

BIAS Z

HP

M

AMP

-46. 5 to 0 dB

BIAS Z

HP

M

AMP

BIAS Z

M Z

EN

BIAS / EAPD

Stereo Paths

Mono Paths

101+ dB (AD1988B)

Split-Z

EN

SWAP

Z

EN

Z

EN

M

Z

EN

SWAP

Z

ZM

EN

CD

Diff Amp

NID:25

NID:16

NID:24

NID:12

NID:11

NID:13

NID:14

NID:17

NID:15

NID:18

Surround Center

PORT- F MIC BIAS

Surround Back

PORT- G

Center / LFE

PORT- D MIC BIAS / EAPD

PORT- D

HP-Front L/R

PORT- A MIC BIAS

PORT- A

Headphone

MONO_OUT

PORT- B MIC BIAS

PORT- B

Microphone

PORT- E MIC BIAS

PORT- E

MIC 1/2

PORT- C MIC BIAS / EAPD

PORT- C

Line In

PCBeep

NID:1A

CD_L CD_GND CD_R

05843-011

Rev. 0 | Page 3 of 20

AD1988A/AD1988B

SPECIFICATIONS

TEST CONDITIONS

Test Conditions for the AD1988A and AD1988B are as follows, unless otherwise noted.

Analog Input/Output Conditions

Temperature at 25°C Digital supply (DV Analog supply (AV

) at 3.3 V ±10%

DD

) at 3.3 V ±5%

DD

MIC_BIAS_FILT at 5.0 V ±5% Sample rate (F

) at 48 kHz

S

Input signal at 1008 Hz Analog output pass band at 20 Hz to 20 kHz

DAC Conditions

Calibrated Output −3 dB relative to full scale 10 kΩ output load: line out tests 32 Ω output load: headphone tests

ADC Conditions

Calibrated 0 db PGA gain Input −3.0 dB relative to full scale

Table 1.

Typ

AD1988A/

Parameter Conditions/Comments Min

DIGITAL DECIMATION AND INTERPOLATION FILTERS

1

fS 8 kHz ~ 192 kHz

AD1988B

Max Unit

Pass Band 0 0.40 fSHz Pass-Band Ripple ±0.005 dB Stop Band 0.60 fS Hz Stop Band Rejection −100 dB Group Delay 20 1/fS Group Delay Variation over Pass Band 0 µs

ANALOG-TO-DIGITAL CONVERTERS

Resolution Gain Error Full-scale span relative to nominal input

1

24 Bits

±10 %

voltage Interchannel Gain Mismatch Difference of gain errors ±0.2 ±0.5 dB ADC Offset Error ±5 mV ADC Crosstalk

Line Inputs Input L, Ground R, Read R;

1

−85 dB

Input R, Ground L, Read L LINE_IN to Other −100 −80 dB

DIGITAL-TO-ANALOG CONVERTERS

Resolution Gain Error Full-scale span relative to nominal input

1

24 Bits

±10 %

voltage Interchannel Gain Mismatch Difference of gain errors ±0.2 ±0.5 dB Tot al Out- of-Band Energ y DAC Crosstalk

1

To 100 kHz −85 dB

Input L, Zero R, Read R;

−95 dB

Input R, Zero L, Read L

DAC VOLUMES—PROGRAMMABLE GAIN ATTENUATOR

Step Size DAC_0, DAC_1, DAC_2, DAC_3, DAC_4 +1.5 dB Output Gain/Attenuation Range −58.5 0 dB

ADC VOLUMES—PROGRAMMABLE GAIN AMPLIFIER/ATTENUATOR

Step Size ADCSEL_0, ADCSEL_1, ADCSEL_2 +1.5 dB PGA Gain/Attenuation Range −58.5 +22.5 dB

ANALOG MIXER—PROGRAMMABLE GAIN AMPLIFIER/ATTENUATOR

Signal-to-Noise Ratio (SNR)

1, 2

Input to output (including CD in) 95/96 Step Size All mixer inputs +1.5 dB Input Gain/Attenuation Range All mixer inputs −34.5 +12.0 dB

Rev. 0 | Page 4 of 20

AD1988A/AD1988B

Typ

AD1988A/

Parameter Conditions/Comments Min

ANALOG LINE LEVEL OUTPUTS

Full-Scale Output Voltage Line out drive enabled 1.0 V rms PORT-C, PORT-E, PORT-F, PORT-G, PORT-H, and

When ports are used as line level outputs 2.83 V p-p

MONO_OUT Output Impedance

1

300 Ω External Total Load Impedance 10 kΩ Output Capacitance External Load Capacitance

1

Total Harmonic Distortion (THD+N) Dynamic Range

1

1000 pF

−85/−85 dB

−60 dB reference to fS A-weighted +95/+101 dB

ANALOG HP DRIVE OUTPUTS

Full-Scale Output Voltage Output drive enabled 1.0 V rms

PORT-A, PORT-B, and PORT-D When ports are used as outputs 2.83 V p-p

Output Impedance

External Load Impedance Output Capacitance External Load Capacitance

Total Harmonic Distortion (THD+N)

1

0.5 Ω

32 Ω

15 pF

1000 pF

10 kΩ load −83/−84 dB

32 Ω load −83/−84 dB Dynamic Range

1

−60 dB reference to fS A-weighted, 10 kΩ or

32 Ω loads

ANALOG INPUTS When ports are used as inputs

PORT-G, PORT-H, or CD 1 V rms

2.83 V p-p

Microphone Boost Amplifiers

PORT-A, PORT-B, PORT-C, PORT-D, PORT-E, or PORT-F 0 dB boost 1 V rms

2.83 V p-p +10 dB boost 0.316 V rms

0.894 V p-p +20 dB boost 0.1 V rms

0.283 V p-p +30 dB boost 0.032 V rms

0.089 V p-p

Input Impedance

1

PCBEEP 23 kΩ PORT-G, PORT-H 60 kΩ All others (with 0 dB boost) 150 kΩ

Input Capacitance

1

5 7.5 pF

ANALOG INPUT PERFORMANCE

Total Harmonic Distortion Plus Noise (THD+N)

1

−81/−82 dB Dynamic Range −60 dB in reference to fS A-weighted +90/+92 dB Signal-to-Noise Ratio (SNR)

2

+90/+92 dB

STATIC DIGITAL SPECIFICATIONS

Digital I/O (DVIO) DVIO @ 3.3 V ± 10% 2.97 3.3 3.63 V VIH 2.0 V VIL 0.8 V VOH 2.4 V VOL 0.6 V

AD1988B Max Unit

3

15 pF

3

+95/+101 dB

3

Rev. 0 | Page 5 of 20

AD1988A/AD1988B

Typ

AD1988A/

Parameter Conditions/Comments Min

POWER SUPPLY

Analog (AVDD) 3.3 V ± 5%

Power Supply Range 3.13 3.30 3.46 V Power Dissipation 155/172 mW Supply Current 47/52 mA

Digital (DVDD) 3.3 V ± 10%

Power Supply Range 2.97 3.30 3.63 V Power Dissipation 247.5/238 mW

Supply Current 75/75 mA Digital I/O (DVIO) 3.3 V ± 10% Power Supply Range 2.97 3.30 3.63 V Power Dissipation 3.96 mW

Supply Current 1.20 mA Power Supply Rejection1 (AVDD) 100 mV p-p signal @ 1 kHz 80 dB V

1

Guaranteed, not tested.

2

SNR measurement defined as “the difference in level between a reference output signal and the device output with no signal applied.” This definition is taken from B.

Metzler, Audio Measurement Handbook, 1

3

RMS values assume sine wave input.

st

edition, Audio Precision, Inc., 1993, p. 165.

AD1988B Max Unit

Table 2. Power-Down States

AD1988A/AD1988B Parameter Comments D-State DIDD Typ AIDD Typ Un it

POWER-DOWN STATES

FUNCTION Node D3 21/20 1.2/1.7 mA DAC Pair Powered down saves (each) D3 6/6 5/5.6 mA ADC Pair Powered down saves (each) D3 5.3/5.4 3.2/3.1 mA Mixer Power Control (and Associated Amps) Saves D3 0/0 2.0/2.4 mA MIC_BIAS Powered down saves D3 0/0 0.5/0.5 mA RESET Low (active) state 2.9/2.7 3.1/3.4 mA

Rev. 0 | Page 6 of 20

ANALOG DEVICES AD1988B Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

FEATURES

ENHANCED FEATURES

TABLE OF CONTENTS

REVISION HISTORY

FUNCTIONAL BLOCK DIAGRAM

SPECIFICATIONS

TEST CONDITIONS

Analog Input/Output Conditions

DAC Conditions

ADC Conditions