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PDF AD1981HD Data sheet ( Hoja de datos )
| Número de pieza | AD1981HD | |
| Descripción | HD Audio SoundMAX Codec | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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HD Audio SoundMAX® Codec
AD1981HD
FEATURES
ENHANCED FEATURES
2 DAC channels: 16-, 20-, or 24-bit
No AFILT pins, results in BOM savings
2 ADC channels: 16- or 20-bit
HD audio sample rates
5.0 V AVDD supply, 3.3 V DVDD supply
Jack-sensing autoconfiguration options
8 kHz, 11.025 kHz, 16 kHz, 22.05 kHz, 32 kHz,
44.1 kHz, 48 kHz
Mute line output and monaural output (MONO_OUT)
when headphones are used
Greater than 90 dB dynamic range
Mute MONO_OUT when a device is in the line out jack
S/PDIF output: 32 kHz, 44.1 kHz or 48 kHz, 16- or 24-bit
Selectable trip level: high/low supports all jack types
Digital beep and analog PC beep pass-through
Peripheral identification/enumeration
Integrated headphone amplifiers on two ports
Jack event/presence detection using SENSE or GPIO pins
Port retasking
Microphone to MONO_OUT for speakerphone applications
Selectable microphone and line inputs
Advanced power management modes
Full analog mixer
4 software-controlled microphone bias pins
Legacy inputs: CD and auxiliary inputs
Up to 30 dB microphone boost
External amplifier power-down (EAPD)
4 GPIOs—external control or traditional jack sense
48-pin, Pb-free LQFP
FUNCTIONAL BLOCK DIAGRAM
GPIO
GPIO
AVDD
AVSS
5V
PC BEEP
RESET
JACK
SENSE
SENSE
Σ GAM
MONO_OUT
PCM/AC3
S/PDIF TX
EQ PCM
Σ-Δ DAC
PC BEEP
DIGITAL
PC BEEP
S/PDIF_OUT
PC BEEP
GM
GA
GA
M
M
Σ
MMM
MM
GA GA GA
GA GA
GAM
HP
MIC
BIAS
Z
GAM
HP
BOOST
Z
MIC
BIAS
GAM
BOOST
Z
Z
PORT-A
HEADPHONE
MIC_BIAS-D
PORT-D
LINE_OUT
MIC_BIAS-C
PORT-C
LINE_IN
PCM/FLOAT32
Σ-Δ ADC
MG
DIFF
AMP
MIC
BIAS
Z
GAM
Z
BOOST
M
MIC
BIAS
Z
M
BOOST
MIC_BIAS-F
PORT-F
REAR MIC
MIC_BIAS-B
PORT-B
FRONT MIC
Figure 1.
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.
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 © 2005 Analog Devices, Inc. All rights reserved.
1 page  
Table 4. Programmable Gain Amplifier—ADC
Parameter
STEP SIZE
PGA GAIN RANGE SPAN
Table 5. Analog Mixer—Input Gain/Amplifiers/Attenuators
Parameter
SIGNAL-TO-NOISE RATIO (SNR)
Line In to Line Out
Microphone In to Line Out1
STEP SIZE: ALL MIXER INPUTS (Except PC BEEP)
STEP SIZE: PC BEEP
INPUT GAIN RANGE: ALL MIXER INPUTS (Except PC BEEP)
DIGITAL PC BEEP
1 Guaranteed by design; not production tested.
Min
0.0
Min
−34.5
−45.0
Table 6. Digital Decimation and Interpolation Filters1
Parameter
PASS BAND
PASS-BAND RIPPLE
TRANSITION BAND
STOP BAND
STOP-BAND REJECTION
GROUP DELAY
GROUP DELAY VARIATION OVER PASS BAND
1 Guaranteed by design; not production tested.
Min
0
0.4 × FS
0.6 × FS
−74
Table 7. Analog-to-Digital Converters
Parameter
RESOLUTION
TOTAL HARMONIC DISTORTION (THD)
DYNAMIC RANGE (−60 dB Input, THD + N Referenced to Full Scale, A-Weighted)
CROSSTALK: LINE INPUTS (Input L, Ground R, Read R; Input R, Ground L, Read L)
CROSSTALK: LINE INPUTS AND OTHER INPUTS
GAIN ERROR (Full-Scale Span Relative to Nominal Input Voltage)
INTERCHANNEL GAIN MISMATCH (Difference of Gain Errors)
ADC OFFSET ERROR
Min
Table 8. Digital-to-Analog Converters
Parameter
RESOLUTION
TOTAL HARMONIC DISTORTION (Line Out)
TOTAL HARMONIC DISTORTION (Headphone Out)
DYNAMIC RANGE (−60 dB Input, THD + N Referenced to Full Scale, A-Weighted)
GAIN ERROR (Full-Scale Span Relative to Nominal Input Voltage)
INTERCHANNEL GAIN MISMATCH (Difference of Gain Errors)
DAC CROSSTALK1 (Input L, Zero R, Read R Out; Input R, Zero L, Read L Out)
1 Guaranteed by design; not production tested.
Min
Rev. 0 | Page 5 of 16
AD1981HD
Typ Max
1.5
22.5
Unit
dB
dB
Typ Max Unit
85 dB
80 dB
1.5 dB
3.0 dB
+12.0
dB
0.0 dB
Typ
16/FS
0
Max
0.4 × FS
±0.09
0.6 × FS
∞
Unit
Hz
dB
Hz
Hz
dB
sec
μs
Typ
20
−95
−85
−80
−100
±10
Max
−80
±0.5
±5
Unit
Bits
dB
dB
dB
dB
%
dB
mV
Typ Max Unit
24 Bits
−92 dB
−75 dB
90 dB
±10 %
±0.7 dB
−80 dB
5 Page 
AD1981HD
Table 21. Root and Function Node Parameters
NID Name
Type Vendor ID Revision ID
ID PID 001 PID 02
00 ROOT
X 11D41981 00100200
01 FUNCTION X
Sub Node Count
PID 04
00010001
0002001E
Function Group Type
PID 05
00000001
Audio F.G. Caps
PID 08
00010C0C
GPIO Caps
PID 11
40000004
1 PID = parameter ID.
Table 22. Widget Parameters
Widget PCM Size, Stream Pin
Caps
Rate
Format Caps
Input
Amp
Caps
Con. List Power Processing Output Vendor-
Len States Caps
Amp Caps Specific
NID Name
PID 091 PID 0A PID 0B PID 0C PID 0D PID 0E PID 0F PID 10
PID 12 PID F0
00 ROOT
01 FUNCTION
000E007F 00000001
00270300
00000009
80053F3D 00000004
02 S/PDIF
00030311 00020060 00000005
00000002
03 Front DAC
00000441 000E007F 00000001
00000000 00000009 00004601
00000010
04 Record ADC
00100511 0006007F 00000001
00000001 00000009
05 Port-D (Line Out)
00400187
0001173F 00270300 00000002
80053F3D 00000008
06 Port-A (Headphone Out) 00400185
0000001F
00000002
80053F3D 00000008
07 MONO_OUT
00400104
00000010
00000001
80053F3D
08 Port-B (Front Microphone) 00400083
00001727 00270300 00000000
00000008
09 Port-C (Line In)
00400187
00001737 00270300 00000002
80053F3D 00000008
0A S/PDIF_OUT
00400301
00000010
00000001
0B Monaural Selector
00300101
00000006
0C Microphone Mixer
00200101
00000002
0D PC Beep Selector
0030010C
00000002
800B0F0F
0E Analog Mixer
00200101
00000008
0F Monaural Mixer
00200100
00000001
10 Digital PC Beep
00700000
00000000
11 Front Mix Amp
0030010D
00000001
80051F17
12 Port-B Mix Amp
0030010D
00000001
80051F17
13 Port-C Mix Amp
0030010D
00000001
80051F17
14 Analog Power-Down 00500500
00000006 00000009
15 Record Selector
0030010D
00000008
80050F00
16 PC Beep In
00400000
00000020
00000000
17 Port-E (Aux In)
00400081
00000027
00000000
00000008
18 Port-F (Rear Microphone) 00400187
00001737 00270300 00000002
80053F3D 00000008
19 CD In
00400001
00000020
00000000
1A Port-D Mix Amp
0030010D
00000001
80051F17
1B Port-E Mix Amp
0030010D
00000001
80051F17
1C Port-F Mix Amp
0030010D
00000001
80051F17
1D CD Mix Amp
0030010D
00000001
80051F17
1E Front Microphone Mute 0030010D
00000001
80000000
1F Rear Microphone Mute 0030010D
00000001
80000000
1 PID = parameter ID.
Default SSID: BFD10000
Rev. 0 | Page 11 of 16
11 Page | ||
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