ANALOG DEVICES AD1884 Service Manual
High Definition Audio
a
FEATURES
FOUR 192 kHz DACs/ADCs
Two independent stereo DAC/ADC pairs
Simultaneous record of two stereo channels
Simultaneous playback of two stereo channels
Independent 8, 11.025, 16, 22.05, 32, 44.1,
48, 88.2, 96, 176.4, and 192 kHz sample rates
16, 20, and 24-bit resolution
Selectable stereo mixer on outputs
S/PDIF OUTPUT
Supports 44.1, 48, 88.2, 96, 176.4, and 192 kHz sample rates
16, 20, and 24-bit data; PCM, and AC3 formats
Digital PCM gain control
DEDICATED AUXILIARY PINS
Stereo CD/auxiliary I/O port w/GND sense
Stereo auxiliary/dock I/O port
Mono out pin for internal speakers or telephony
SoundMAX
®
ENHANCED FEATURES
Two stereo headphone amplifiers
Microsoft Vista premium logo for notebook
90 dB audio outputs, 85 dB audio inputs
Internal 32-bit arithmetic for greater accuracy
Impedance and presence detection on all jacks
Three independent microphone bias pins
Digital and analog PCBeep
Three general-purpose digital I/O (GPIO) pins
3.3 V analog and digital supply voltages
Advanced power management modes
48-lead, Pb-free LFCSP_VQ package
Codec
AD1884
H
D
A
U
D
I
O
I
N
T
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R
F
A
C
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Rev. 0
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.
DAC1
DAC0
S/PDIF OUT
DIGITAL
PCBEEP
ADC0
ADC1
Figure 1. Functional Block Diagram
AD1884
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2007 Analog Devices, Inc. All rights reserved.
PORT A
PORT D
MONO OUT
PORT E
PORT F
PCBEEP
PORT C
PORT B
AD1884
CONTENTS
General Description ................................................. 3
Additional Information ......................................... 3
Jack Configurations .............................................. 3
AD1884 Specifications .............................................. 4
Test Conditions ................................................... 4
Performance ........................................................ 4
General Specifications ............................................ 4
HD–Audio Link Specification .................................. 6
Power Down States ............................................... 7
Absolute Maximum Ratings ....................................... 8
ESD Sensitivity ..................................................... 8
Environmental Conditions ...................................... 8
Pin Configuration and Function Descriptions ................. 9
HD Audio Widgets ................................................ 12
AD1884 HD Audio Parameters ................................. 13
Outline Dimensions ............................................... 15
Ordering Guide ..................................................... 15
REVISION HISTORY
1/07–Rev 0: Initial version
Rev. 0 | Page 2 of 16 | January 2007
GENERAL DESCRIPTION
The AD1884 family of audio codecs and SoundMAX® software
provides superior high definition audio quality that exceeds
Vista Premium for notebook performance. The AD1884 has
four 192 kHz DACs, four 192 kHz ADCs, S/PDIF output, Digital Beep and analog PCBeep. These features make the AD1884
the right choice for notebook PCs that meet the Microsoft Vista
premium performance specifications as well as desktop PCs that
meet the Microsoft Vista Basic performance specifications.
The AD1884 is available in a 48-lead, Pb-free frame chip scale
package in both reels and trays. See Ordering Guide on Page 15.
ADDITIONAL INFORMATION
This data sheet provides a general overview of the AD1884
SoundMAX codec’s architecture and functionality. Additional
information on the AD1884 is available in the AD1884 Programmers Reference Manual. Please contact your local ADI
sales representative for more information. For information on
SoundMAX codecs and software see Analog Devices website at
http://www.analog.com/soundMAX.
JACK CONFIGURATIONS
The guideline shown in Table 1 should be used when selecting
ports for particular functions. The symbols used in this table are
defined as: LI = Line Level Input, LO = Line Level Output,
HP = Output capable of driving headphone load, MIC = Input
supports microphones with MIC bias and boost amplifier.
AD1884
Table 1. Port Assignments
Port HP MIC LO LI
Port A
Port B
Port C
Port D
Port E
Port F
MONO_OUT
x
x
x
x
x
x
x
x
x
x
x
x
x
x
Rev. 0 | Page 3 of 16 | January 2007
AD1884
AD1884 SPECIFICATIONS
TEST CONDITIONS
Parameter Test Condition
Tem pe ra tu re 25°C
Digital Supply 3.3 V
Analog Supply 3.3 V
MIC_BIAS_IN (via Low-Pass Filter) 5.0 V
Sample Rate f
S
Input Signal (Frequency Sine Wave)
Amplitude for THD + N
Analog Output Pass Band
DAC
ADC
PERFORMANCE
Parameter Min Typ Max Unit
Line Out Drive (10 kΩ loads—DAC to Pin)
Total Harmonic Distortion (THD + N) –84 dB
Dynamic Range (–60 dB in ref to fS A-Weighted) 90 dB
Signal-to-Noise Ratio 90 dB
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 90 dB
Microphone/Line In (Pin to ADC, Mic Boost = 0 dB)
Total Harmonic Distortion (THD + N)
Dynamic Range (–60 dB in ref to f
Signal-to-Noise Ratio 85 dB
48 kHz
1008 Hz
–3.0 dB Full Scale
20 Hz to 20 kHz
10 kΩ Output Load: Line Out Tests
32 Ω Output Load: Headphone Tests
0 dB Gain
–74 dB
A-Weighted) 90 dB
S
–78 dB
A-Weighted) 85 dB
S
GENERAL SPECIFICATIONS
Parameter Min Typ Max Unit
DIGITAL DECIMATION AND INTERPOLATION FILTERS
Pass Band – fS (kHz) = 8 ~ 192
Pass-Band Ripple– f
Stop Band – f
Stop-Band Rejection – f
Group Delay – f
(kHz) = 8 ~ 192
S
(kHz) = 8 ~ 192
S
(kHz) = 8 ~ 192
S
(kHz) = 8 ~ 192
S
Group Delay Variation Over Pass Band
ANALOG TO DIGITAL CONVERTERS
Resolution
Gain Error
Interchannel Gain Mismatch (Difference of Gain Errors)
ADC Offset Error
ADC Crosstalk
2
(Full-Scale Span Relative to Nominal Input Voltage)
1
1
Line Inputs (Input L, Ground R, Read R; Input R, Ground L, Read L)
Line_In to Other
1
0
0.6 f
S
20
0
24
±0.2
–85
–100
0.4 f
S
±0.005
–100
±10
±0.5
±5
–80
Hz
dB
Hz
dB
1/f
μs
Bits
%
dB
mV
dB
dB
S
Rev. 0 | Page 4 of 16 | January 2007
AD1884
Parameter Min Typ Max Unit
DIGITAL TO ANALOG CONVERTERS
Resolution
Gain Error1 (Full Scale Span Relative to Nominal Input Voltage)
Interchannel Gain Mismatch (Difference of Gain Errors)
Total Audible Out-of-Band Energy1 (Measured from 0.6 × fS to 20 kHz)
DAC Crosstalk
1
(Input L, Zero R, Measure R_OUT; Input R, Zero L, Measure L_OUT)
DAC VOLUMES
Step Size (DAC-0, DAC-1)
Output Gain/Attenuation Range
Mute Attenuation of 0 dB Fundamental
1
ADC VOLUMES
Step Size (ADCSEL-0, ADCSEL-1)
PGA Gain/Attenuation Range –58.5
ANALOG MIXER
Signal-to-Noise Ratio Input to Output – Ports B, C, or F, to Port D Output
Step Size: All Mixer Inputs
Input Gain/Attenuation Range: All Mixer Inputs –34.5
ANALOG LINE LEVEL OUTPUTS
Full-Scale Output Voltage: Line Out Drive Enabled
Ports A, D, E, F, and Mono Out
Output Impedance
External Load Impedance
Output Capacitance
1
1
1
External Load Capacitance
ANALOG HP DRIVE OUTPUTS
Full-Scale Output Voltage: Line Out Drive Enabled
Ports A and D (when HP Drive is Enabled)
Output Impedance
External Load Impedance
Output Capacitance
External Load Capacitance
1
1
1
1
ANALOG INPUTS
Input Voltages—Port B, C, or E
Mic Boost = 0 dB
Input Voltages—Microphone Boost Amplifier, Ports B, C, or E
Mic Boost = +10 dB
Mic Boost = +20 dB
Mic Boost = +30 dB
Input Impedance
PCBEEP
Ports B, C, E (Mic Boost = 0 dB)
Port F
Input Capacitance
1
–58.5
1.0
2.83
10
1.0
2.83
32
24
±10
±0.5
–85
–95
1.5
0
–80
1.5
+22.5
90
–1.5
+12.0
Bits
%
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
V rms
V p-p
190
Ω
kΩ
15
1000
pF
pF
V rms
V p-p
0.5
Ω
Ω
15
1000
1
2.83
0.316
0.894
0.1
0.283
0.032
0.089
23
150
45
5 7.5
pF
pF
V rms
V p-p
V rms
V p-p
V rms
V p-p
V rms
V p-p
kΩ
kΩ
kΩ
pF
3
Rev. 0 | Page 5 of 16 | January 2007
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