|
Details, datasheet, quote on part number:AD1985
| |
Datasheet text preview:
AC '97 SoundMAX® Codec
AD1985
AC '97 2.3 COMPLIANT FEATURES
6 DAC channels for 5.1 Surround Greater than 90 dB dynamic range 20-bit resolution on all DACs S/PDIF Output Integrated stereo headphone amplifiers Variable rate audio Double rate audio (fS = 96 kHz) Line-level mono phone input High quality CD mixer input Selectable MIC input with preamp AUX and Line In stereo inputs External amplifier power down (EAPD) Power management modes Jack sensing and peripheral enumeration/identification 48-lead LQFP package
ENHANCED FEATURES
Integrated parametric equalizer (EQ) Stereo microphone with preamplifiers Integrated PLL for system clocking Variable sample rate 7 kHz to 96 kHz 7 kHz to 48 kHz in 1 Hz increments 96 kHz for double rate audio Advanced jack sense with auto topology switching Software enabled VREFOUT for microphones and external power amp Software enabled outputs for jack sharing Auto down-mix and channel spreading Microphone to mono output Stereo microphone analog passthrough to outputs Built-in stereo microphone and Center/LFE pin sharing Selectable Center/LFE tip/ring swapping to support various speaker products
VREFOUT VREF Z G VOLTAGE REFERENCE CODEC CORE PCM L/R ADC RATE 16-BIT - ADC 16-BIT - ADC PCM LFE DAC RATE PLL ADC SLOT LOGIC AC '97 INTERFACE V2.3 XTL_OUT XTL_IN SPDIF_OUT
OMS
MIC1 MIC2 PHONE_IN CD_L CD_GND CD_R AUX_L AUX_R LINE_IN_L LINE_IN_R LFE_OUT
OMS
G
2CMIC MS
G
AD1985
SPDIF TX
RECORD SELECTOR
ID0
CD DIFF AMP
G G
M M
ID1
RESET
MZ
A
SPRD
M
GA
20-BIT - DAC 20-BIT - DAC
CSWP
DAC SLOT LOGIC
SYNC
CENTER_OUT
MZ
A
LOSEL
SPRD
M GA MMM GA M GA M GA M GA M GA M GA M GA M M A GA MMM
GA
CSWP
BITCLK
LINE_OUT_L
MZ
A
EQ COEF STORAGE
MONO_OUT
MZ
A
MIX
PC BEEP GENERATOR PCM FRONT DAC RATE 20-BIT - DAC 20-BIT - DAC 20-BIT - DAC 20-BIT - DAC PCM SURR DAC RATE
BYPASS
SDATA_OUT
LOSEL
EQ
SDATA_IN
LINE_OUT_R
MZ
A
BYPASS
HPSEL
M
M
GA GA GA GA
SURR_OUT_L/ HP_OUT_L SURR_OUT_R/ HP_OUT_R
HP M
A
M
M M
EQ
AC '97 CONTROL REGISTERS ANALOG MIXING CONTROL JACK SENSE
HP M
A
HPSEL
EAPD JS0 JS1 JS2 JS3
Figure 1. Functional Block Diagram
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 companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2003 Analog Devices, Inc. All rights reserved.
03610-0-001
G = GAIN A = ATTENUATION M = MUTE Z = HIGH Z
M
EAPD
AD1985
TABLE OF CONTENTS
Detailed Functional Block Diagram .... 3 AD1985--Specifications......... 4 Absolute Maximum Ratings... 9 Pin Configuration And Functional Descriptions..... 10 Pin Descriptions ....... 10 Outline Dimensions ..... 47 Ordering Guide ........ 47
REVISION HISTORY
Revision 0: Initial Version
Rev. 0 | Page 2 of 48
VREFOUT: 0x76 D3-D2 DEF=00 (+2.25V)
OMS: 0x74 D9 DEF=0(MIC_1/2)
M20: 0x0E D6 DEF=0 (0dB Gain) MGB[1:0]: 0x76 D1-D0 DEF=0 (+20dB)
2CMIC: 0x76 D7 DEF=0 (MS Sel) MS: 0x20 D8 DEF=0 (MIC_1)
VREFOUT
00= 01= 10= 11=
+2.25V HIGH Z +3.7V 0V
VREF
+2.25V
XTL_OUT
X TL_IN SPDIF_OUT
MIC1 G G
REC SELECTOR 0x1A D2-D0 RIGHT D10-D8 LEFT DEF=0x000 REC GAIN: 0x1C 0dB to +22.5dB DEF=0x8000 0dB/MUTED PCM ADC RATE: 0x32 7kHz-48kHz in 1Hz steps DEF 0xBB80 48kHz
0
AD1985
Z CODEC CORE PLL SPDIF TX G VOLTAGE REFERENCE
PHONE_IN CD DIFF AMP G M
Left
OMS
1
2CMIC MS
MIC2
0
OMS
1 00= 01= 10= 11 +20dB Gain +10dB Gain +30dB Gain (reserved)
CD_L 16-BIT - ADC 16-BIT - ADC ADC SLOT LOGIC
ID0
CD_GND
CD_R G M
Right
AUX_L
ID1
AUX_R
LINE_IN_L
AC97 MODE: 0x18 ADI MODE: PCM VOL 0x36 +12dB to -34.5dB DEF 0x8808 0dB/MUTED PCM C/LFE DAC RATE: 0x30 7kHz-48kHz in 1Hz steps DEF 0xBB80 48kHz 1
LINE_IN_R
000= 001= 010= 011= 100= 101= 110= 111= DSA: 0x28 D5-D4 DEF 00
MIC CD --AUX LINE_IN STR_MIX MON_MIX PHONE
RESET
SPRD: 0x76 D6 AC97 MODE: C&LFE VOL 0x36 DEF=0 (NoSprd) ADI MODE: MASTER VOL 0x02 0dB to -46.5dB 0 LFE Right DEF 0x8000 0dB/MUTED LINE_IN VOL: 0x10 +12 to -34.5dB DEF=0x8808 0dB/MUTED
SYNC
0 1
SPRD
DETAILED FUNCTIONAL BLOCK DIAGRAM
LFE_OUT
1 DOWN MIX: 0x76 DMIX 1,0 (D9,D8) DEF=0x0 (MUTED) DOWN MIX: 0x76 DMIX 1,0 (D9,D8) DEF=0x0 (MUTED) LFE Right 0 MIC VOL: 0x0E +12 to -34.5dB DEF=0x8808 0dB/MUTED
MZ A
CSWP
M
GA
20-BIT - DAC
DAC SLOT LOGIC
OMS: 0x74 D9 DEF=0(MIC_1/2) CLDIS: 0x76 D11 DEF=0(enabled)
SPRD
1
Center Left
GA
Center Left
GA GA M M
AUX VOL: 0x16 +12 to -34.5dB DEF=0x8808 0dB/MUTED +0 to -45dB DEF=0x8000 0dB/MUTED
GA GA M M M M M M M GA GA
GA
GA
LODIS: 0x76 D12 DEF=0 (enabled) PHONE VOL: 0x0C +12 to -34.5dB DEF=0x8008 0dB/MUTED
Left
LOSEL
MIX
LODIS: 0x76 D12 DEF=0 (enabled)
1
M
DOWN MIX: 0x76 DMIX 1,0 (D9,D8) DEF=0x0 (MUTED)
Left
20-BIT - DAC M M GA GA
Right
EQB
BYPASS
Right
LOSEL
0
1
BYPASS
AC97 MODE: SURR VOL 0x38 ADI MODE: HEADPHONE VOL 0x04 0dB to -46.5dB DEF 0x8000 0dB/MUTED
20-BIT - DAC
0
EQ
1
Left
HPSEL
SURR_OUT_L/ HP_OUT_L A
0 1 0
HP
M
AC97 MODE: 0x18 ADI MODE: PCM VOL 0x38 PCM SURR DAC RATE: 0x2E 7kHz-48kHz in 1Hz steps +12dB to -34.5dB DEF 0x8808 0dB/MUTED DEF 0xBB80 48kHz
AC '97 CONTROL REGISTERS
Note: Setting to enable Surround 5.1 is LOSEL=1
M M M
GA GA
20-BIT - DAC 20-BIT - DAC
EAPD: 0x26 D15 DEF=0 (Enabled)
SURR_OUT_R/ HP_OUT_R
HPSEL: 0x76 D10 DEF=0 (Surround)
Right
HPSEL
HP
M
A
JSENSE: 0x72 DEF=0x0000
HP STBY: PR6 reg 0x26 D14 1=power down, DEF=0
G = GAIN A = ATTENUATION M = MUTE Z = HIGH Z
EAPD
ANALOG MIXING CONTROL JACK SENSE
AD1985
03610-0-002
EAPD JS0 JS1 JS2 JS3
EQ COEF STORAGE
Figure 2. Detailed Functional Block Diagram
M M
AUX VOL: 0x16 +12 to -34.5dB DEF=0x8808 0dB/MUTED
Rev. 0 | Page 3 of 48
A M GA 20-BIT - DAC M M
1 0
LINE_OUT: MASTER VOL 0x02 0dB to -46.5dB DEF=0x8000 0dB/MUTED
LOSEL: 0x76 D5 DEF=0 (Mixer)
CSWP: 0x74 D3 DEF=0 (NoCSwp)
LINE_OUT_L
MZ
A
MIX: 0x20 D9 DEF=0 (Mixer) 1
MONO_OUT: MONO VOL 0x06 0dB to -46.5dB DEF=0x8000 0dB/MUTED
MONO_OUT A
0
MZ
PCBeep: 0x0A Vol: D4-D0 Mute: D15 Frequency: D12-D5
CSWP
CENTER_OUT
MZ
0
AC '97 INTERFACE V2.3
BITCLK
CD VOL: 0x012 +12 to -34.5dB DEF=0x8008 0dB/MUTED
SDATA_OUT M A PC BEEP GENERATOR
EQB: 0x72 D9-D8 DEF=0 (EQ Enabled) 0
LINE_OUT: MASTER VOL 0x02 0dB to -46.5dB DEF=0x8000 0dB/MUTED 1
LOSEL: 0x76 D5 DEF=0 (Mixer)
LINE_OUT_R A
MZ
PCM VOL: 0x18 +12dB to -34.5dB DEF 0x8808 0dB/MUTED
PCM FRONT DAC RATE: 0x2C 7kHz-48kHz in 1Hz steps DEF 0xBB80 48kHz
EQ
SDATA_IN
AD1985
AD1985--SPECIFICATIONS
Test Conditions unless Otherwise Noted
Parameter Temperature Digital Supply (DVDD) Analog Supply (AVDD) Sample Rate (fS) Input Sine Wave Signal Analog Output Pass-Band Value/Condition Unit 25 °C 3.3 V 5.0 V 48 kHz 1,008 Hz 20 to 20,000 Hz Calibrated Output 3 dB relative to full scale 10 k output load: line 32 output load: headphone 2 k output load: center and LFE 47.5 k output load: mono Calibrated 0 dB PGA gain Input 3 dB relative to full scale 24.576 MHz
DAC Test Conditions
ADC Test Conditions Clock
ANALOG INPUT
Parameter INPUT VOLTAGE LINE_IN, CD, AUX, PHONE_IN MIC_IN with +30 dB Preamp MIC_IN with +20 dB Preamp MIC_IN with +10 dB Preamp MIC_IN with 0 dB Preamp Input Impedance1 Input Capacitance1
1
Min
Typ 1 2.83 0.032 0.089 0.1 0.283 0.316 0.894 1 2.83 20 5
Max
Unit V rms V p-p V rms V p-p V rms V p-p V rms V p-p V rms V p-p k pF
7.5
Guaranteed, not tested.
MASTER VOLUME
Parameter Step Size (Line Out, Mono Out, Surround Out, Center, LFE) Output Attenuation Range (0 dB to 46.5 dB) Mute Attenuation of 0 dB Fundamental1
1
Min
Typ 1.5 46.5
Max
80
Unit dB dB dB
Guaranteed, not tested.
PROGRAMMABLE GAIN AMPLIFIER--ADC
Parameter Step Size (0 dB to +22.5 dB) PGA Gain Range Span Min Typ 1.5 22.5 Max Unit dB dB
Rev. 0 | Page 4 of 48
AD1985
ANALOG MIXER--INPUT GAIN/AMPLIFIERS/ATTENUATORS
Parameter Signal-to-Noise Ratio (SNR) CD to LINE_OUT LINE, AUX, PHONE, to LINE_OUT MIC1 or MIC2 to LINE_OUT Step Size: All Mixer Inputs, except PC Beep Input Gain/Attenuation Range (+12 dB to 34.5 dB): All Mixer Inputs Parameter Pass Band Pass-Band Ripple Transition Band Stop Band Stop-Band Rejection Group Delay Group Delay Variation over Pass Band Min Typ 90 85 80 1.5 46.5 Min 0 0.4 × FS 0.6 × FS 74 16/Fs 0 Min Typ 16 85 84 85 85 95 ±10 ±0.5 ±5 Min Typ 20 90 75 90 100 ±10 ±0.7 100 85 Max Max Typ Max 0.4 × FS ±0.09 0.6 × FS Max Unit dB dB dB dB dB Unit Hz dB Hz Hz dB s µs Unit Bits dB dB dB dB dB % dB mV Unit Bits dB dB dB dB % dB dB dB
DIGITAL DECIMATION AND INTERPOLATION FILTERS1
ANALOG-TO-DIGITAL CONVERTERS
Parameter Resolution Total Harmonic Distortion (THD) Dynamic Range (60 dB in THD+N; Referenced to Full-Scale; A-Weighted) Signal-to-Intermodulation Distortion1 (CCIF Method) ADC Crosstalk1 Line Inputs (Input L, Ground R, Read R; Input R, Ground L Read L) LINE_IN to Other Gain Error (Full-Scale Span Relative to Nominal Input Voltage) Interchannel Gain Mismatch (Difference of Gain Errors) ADC Offset Error1
DIGITAL-TO-ANALOG CONVERTERS
Parameter Resolution Total Harmonic Distortion (THD); LINE_OUT, C/LFE Total Harmonic Distortion (THD); HP_OUT Dynamic Range (60 dB in THD+N; Referenced to Full-Scale; A-Weighted) Signal-to-Intermodulation Distortion1 (CCIF Method) Gain Error (Output Full-Scale Voltage Relative to Nominal Output Full-Scale Voltage)2 Interchannel Gain Mismatch (Difference of Gain Errors) DAC Crosstalk1 (Input L, Zero R, Read R_OUT; Input R, Zero L, Read L_OUT Total Out-of-Band Energy (Measured from 0.6 × fS to 100 kHz)1
1 2
Guaranteed, not tested. C/LFE specified with 10 k load.
Rev. 0 | Page 5 of 48
|
|
