ANALOG DEVICES AD1882 Service Manual

High Definition Audio

ADC0

ADC1

DAC2

PORT D

PORT F

PORT G

MONO OUT

AD1882

H
D

A
U
D

I

O

I
N
T
E
R
F
A
C
E

PORT A

PORT C

DAC0

HP

HP

⌺

⌺

⌺

⌺

⌺

DAC1

PCBEEP

CD IN

⌺

⌺

PORT E

PORT B

⌺

DIGITAL

BEEP

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SoundMAX Codec

AD1882

FEATURES

2 stereo headphone amplifiers
Microsoft Vista Premium logo for notebook and desktop

95 dB audio outputs, 90 dB audio inputs
Internal 32-bit arithmetic for greater accuracy
Impedance and presence detection on all jack pins
Digital synthesis PCBeep
C/LFE channel swapping
2 general-purpose digital I/O (GPIO) pins
Advanced power management modes
EAPD control for internal speakers
48-lead, Pb-free LFCSP_VQ package

SIX 96 kHz DACs

3 independent stereo DAC pairs
Independent 8 kHz, 11.025 kHz, 16 kHz, 22.05 kHz, 32 kHz,

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

FOUR 96 kHz ADCs

2 independent stereo ADC pairs
Simultaneous record of up to 4 channels
Independent 8 kHz, 11.025 kHz, 16 kHz, 22.05 kHz, 32 kHz,

44.1 kHz, 48 kHz, 88.2 kHz, and 96 kHz sample rates

16-, 20-, and 24-bit resolution

S/PDIF OUTPUT

Supports 44.1 kHz, 48, kHz 88.2 kHz, and 96 kHz sample rates
16-, 20-, and 24-bit data widths; PCM and AC3 formats
Digital PCM gain control

DEDICATED AUXILIARY PINS

Stereo CD input w/GND sense
Mono out pin for internal speakers or telephony
Analog PCBeep input pin

Rev. A

Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other 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.

Figure 1. AD1882 Block Diagram

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 U.S.A.
Tel:[phone] www.analog.com
Fax:[phone] ©2008 Analog Devices, Inc. All rights reserved.

AD1882

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TABLE OF CONTENTS

Features ................................................................. 1

Revision History ...................................................... 2

General Description ................................................. 3

Additional Information .......................................... 3

Jack Configuration ................................................ 3

Specifications .......................................................... 4

Test Conditions .................................................... 4

Performance ........................................................ 4

General Specifications ............................................ 4

HD Audio Link Specifications .................................. 6

Power-Down States ............................................... 6

Absolute Maximum Ratings .................................... 7

ESD Caution ........................................................ 7

Environmental Conditions ...................................... 7

Pin Configuration and Function Descriptions ................. 8

HD Audio Widgets ................................................ 11

HD Audio Parameters ............................................. 12

Outline Dimensions ............................................... 16

Ordering Guide ..................................................... 16

REVISION HISTORY

4/08—Rev. 0 to Rev. A

Changed analog and digital power supply specifications......6

Changed analog and digital specifications and revised footnotes

in Power-Down States ............................................... 6

Changed revision ID in Widget Parameters .................. 13

Rev. A | Page 2 of 16 | April 2008

GENERAL DESCRIPTION

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AD1882

The AD1882 audio codec and SoundMAX® software provides
superior HD audio quality that exceeds Vista Premium perfor­mance. The AD1882 has six DACs and four ADCs, two stereo
headphone ports, C/LFE swapping, digital and analog PCBeep,
and S/PDIF output, making the AD1882 the right choice for
desktop PCs where performance is the primary consideration.

The jack retasking feature on this product supports various con­figurations including platforms for 5.1 on 5 or 3 jacks, and front
panel jack retasking.

The AD1882 is available in a 48-lead RoHS compliant lead
frame chip scale package in both reels and trays. See Ordering

Guide on Page 16.

ADDITIONAL INFORMATION

This data sheet provides a general overview of the AD1882
SoundMAX codec’s architecture and functionality. Additional
information on the AD1882 is available in the AD1882 Pro­grammers Reference Manual. Please contact your local Analog
Devices, Inc., sales representative for more information. For
information on SoundMAX codecs and software, see Analog
Devices website at www.analog.com/soundMAX.

JACK CONFIGURATION

The guidelines shown in Table 1 through Table 3 should be
used when selecting ports for particular functions.

Table 2. Typical Desktop Configuration with 5.1 on 3 Jacks

Port Function

Port A Front Panel Headphone
Port B Front Panel Microphone
Port C Rear Panel Line-In/Surround
Port D Rear Panel Line-Out/Headphone
Port E Rear Panel Microphone / C/LFE

Table 3. Typical Notebook Configuration

Port Function

Port A Headphone
Port B Microphone
Port C Internal Microphone
Port D Internal Stereo Speakers
Port E Docking Station Line-In/Microphone

Table 1. Typical Desktop Configuration with Discreet Jacks

Port Function

Port A Front Panel Headphone
Port B Front Panel Microphone
Port C Rear Panel Line-In
Port D Rear Panel Line-Out/Headphone
Port E Rear Panel Microphone
Port F Rear Panel Surround
Port G Rear Panel C/LFE

Rev. A | Page 3 of 16 | April 2008

AD1882

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SPECIFICATIONS

TEST CONDITIONS

Parameter Test Condition

Tem pe ra tu re
Digital Supply
Analog Supply
MIC_BIAS_IN (via Low-Pass Filter)
Sample Rate f
Input Signal (Frequency Sine Wave)
Amplitude for THD + N
Analog Output Pass Band
DAC 10 kΩ Output Load: Line Out Tests

ADC 0 dB Gain

S

PERFORMANCE

Parameter Min Typ Max Unit

Line-Out Drive (10 kΩ Loads—DAC to Pin)
Total Harmonic Distortion (THD + N)
Dynamic Range (–60 dB in Ref to fS A-Weighted)
Signal-to-Noise Ratio
Headphone Drive (32 Ω Loads—DAC to Pin)
Total Harmonic Distortion (THD + N)
Dynamic Range (–60 dB in Ref to f
Signal-to-Noise Ratio
Input Ports (Pin to ADC, Mic Boost = 0 dB)
Total Harmonic Distortion (THD + N)
Dynamic Range (–60 dB in Ref to f
Signal-to-Noise Ratio

A-Weighted)

S

A-Weighted)

S

25°C

3.3 V

3.3 V

5.0 V
48 kHz
1008 Hz
–3.0 dB Full Scale
20 Hz to 20 kHz

32 Ω Output Load: Headphone Tests

–85
95
95

–83
95
95

–81
90
90

dB
dB
dB

dB
dB
dB

dB
dB
dB

GENERAL SPECIFICATIONS

Table 4. AD1882 General Specifications

Parameter Min Typ Max Unit

DIGITAL DECIMATION AND INTERPOLATION FILTERS—f

Pass Band 00.4 f
Pass-Band Ripple ±0.005 dB
Stop Band 0.6 f
Stop-Band Rejection dB
Group Delay +20 –100 1/f
Group Delay Variation Over Pass Band 0 μs

ANALOG-TO-DIGITAL CONVERTERS

Resolution 24 Bits
Gain Error (Full-Scale Span Relative to Nominal Input Voltage)
Interchannel Gain Mismatch (Difference of Gain Errors) ±0.5 dB
ADC Offset Error
ADC Crosstalk
Line Inputs (Input L, Ground R, Read R; Input R, Ground L, Read L) –85 dB
Line Inputs to Other –100 –80 dB

1

1

= 8 kHz to 192 kHz

S

2

1

S

S

±10 %

±5mV

Hz

Hz

S

Rev. A | Page 4 of 16 | April 2008

AD1882

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Table 4. AD1882 General Specifications (Continued)

Parameter Min Typ Max Unit

DIGITAL TO ANALOG CONVERTERS

Resolution 24 Bits
Gain Error (Full-Scale Span Relative to Nominal Input Voltage)
Interchannel Gain Mismatch (Difference of Gain Errors) ±0.5 dB
Total Audible Out-of-Band Energy (Measured from 0.6 × f
DAC Crosstalk (Input L, Zero R, Read R_OUT; Input R, Zero L, Read L_OUT)

DAC VOLUMES

Step Size (DAC-0, DAC-1, DAC-2) 1.5 dB
Output Gain/Attenuation Range –58.5 0 dB
Mute Attenuation of 0 dB Fundamental

1

ADC VOLUMES

Step Size (ADCSEL-0, ADCSEL-1) 1.5 dB
PGA Gain/Attenuation Range –58.5 +22.5 dB
Mute Attenuation of 0 dB Fundamental

1

ANALOG MIXER

Signal-to-Noise Ratio (SNR) Input to Output
CD to Port D Output
Port B, C, or E to Port D Output
Port A to Port D Output
Port D to Port A Output
Step Size: All Mixer Inputs 1.5 dB
Input Gain/Attenuation Range: All Mixer Inputs –34.5 +12.0 dB

ANALOG LINE LEVEL OUTPUTS

Full-Scale Output Voltage 1.0 1.0 V rms
Ports C, E, F, and G Mono Out 2.83 V p-p

Output Impedance
External Load Impedance
Output Capacitance
External Load Capacitance 1000 pF

ANALOG HP DRIVE OUTPUTS

Full-Scale Output Voltage 1.0 V rms
Ports A and D 2.83 V p-p

Output Impedance
External Load Impedance
Output Capacitance
External Load Capacitance

ANALOG INPUTS

CD, Port D (When Used as Input) 1

Microphone Boost Amplifier, Ports B, C, or E

Boost = 0 dB 1

(When Used as Inputs)

Boost = 10 dB 0.316

Boost = 20 dB 0.1

Boost = 30 dB 0.032

Input Impedance
Input Capacitance

1

1

1

to 100 kHz)

S

1

1

1

1

±10 %

1

1

–85 dB
–95 dB

–80 dB

–80 dB

95
95
95
95
95

1

10 kΩ

300 Ω

dB
dB
dB
dB
dB

15 pF

1

1

32 Ω

15 pF

0.5 Ω

1000 pF

V rms

2.83

V p-p
V rms

2.83

V p-p
V rms

0.894

V p-p
V rms

0.283

V p-p
V rms

0.089

V p-p

20 kΩ

57.5 pF

3

3

3

3

3

3

3

Rev. A | Page 5 of 16 | April 2008