Datenblatt-pdf.com


AD1981A Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer AD1981A
Beschreibung AC 97 SoundMAX Codec
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 24 Seiten
AD1981A Datasheet, Funktion
a
AC ‘97 SoundMAX® Codec
AD1981A
AC ’97 2.2-COMPLIANT CODEC
FEATURES
S/PDIF Output, 20 Bits Data Format, Supporting
48 kHz and 44.1 kHz Sample Rates
Integrated Stereo Headphone Amplifier
Variable Sample Rate Audio
External Audio Power-Down Control
Greater than 90 dB Dynamic Range
16-Bit Stereo Full-Duplex Codec
20-Bit DAC Input
Three Analog Line-Level Stereo Inputs for
LINE-IN, AUX, and CD
Mono Line-Level Phone Input
Mono MIC Input with Built-In Programmable Preamp
High Quality CD Input with Ground Sense
Mono Output for Speakerphone or Internal Speaker
Power Management Support
48-Lead LQFP Package
ENHANCED FEATURES
Built-in Digital Equalizer Function for Optimized
Speaker Sound
Full Duplex Variable Sample Rates from 7040 Hz to 48 kHz
with 1 Hz Resolution
Jack Sense Pins Provide Automatic Output Switching
Software-Programmed VREFOUT Output for Microphone
Bias and External Power Amp
Split Power Supplies: 3.3 V Digital and 5 V Analog
Multiple Codec Configuration Options
MIC_IN
AUX
PHONE_IN
CD_L
CD_GND
CD_R
LINE_IN
HP_OUT_L
LINE_OUT_L
MONO_OUT
LINE_OUT_R
HP_OUT_R
AD1981A
MIC PREAMP
G
CD
DIFF AMP
HP M
A
MA
MA
MA
HP M
A
FUNCTIONAL BLOCK DIAGRAM
VREF
VREFOUT
XTL_OUT XTL_IN ID1 ID0
GA
GA
M
M
GA GA
GA GA GA
MM
MMM
GA
M
M
M
VREF G
XTAL OSCILLATOR LINK PORT/
ID SELECT
A/D SAMPLE RATE
GENERATOR
PLL CLOCK
GENERATOR
GM
16-BIT -A/D
CONVERTER
GM
16-BIT -A/D
CONVERTER
GM
GM
M GA
M GA
16-BIT -A/D
CONVERTER
D/A SAMPLE RATE
GENERATOR
16-BIT -A/D
CONVERTER
20-BIT -D/A
CONVERTER
SPKR
EQ
20-BIT -D/A
CONVERTER
SPKR
EQ
EQ COEFF STORAGE
ANALOG
MUTE
CONTROL
LOGIC
AC ’97 CONTROL REGISTERS
JACK SENSE
EAPD
SPDIF
KEY:
G = GAIN
A = ATTENUATE
M = MUTE
SoundMAX is a registered trademark of Analog Devices, Inc.
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. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
JS0 JS1
EAPD
SPDIF
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
© Analog Devices, Inc., 2002






AD1981A Datasheet, Funktion
AD1981A
PIN CONFIGURATION
48 47 46 45 44 43 42 41 40 39 38 37
DVDD1 1
XTL_IN 2
XTL_OUT 3
DVSS1 4
SDATA_OUT 5
BIT_CLK 6
DVSS2 7
SDATA_IN 8
DVDD2 9
SYNC 10
RESET 11
NC 12
NC = NO CONNECT
PIN 1
IDENTIFIER
AD1981A
TOP VIEW
(Not to Scale)
13 14 15 16 17 18 19 20 21 22 23 24
36 LINE_OUT_R
35 LINE_OUT_L
34 AVDD4
33 AVSS4
32 AFILT4
31 AFILT3
30 AFILT2
29 AFILT1
28 VREFOUT
27 VREF
26 AVSS1
25 AVDD1
–6– REV. 0

6 Page









AD1981A pdf, datenblatt
AD1981A
AUX Volume (Index 16h)
Reg Num Name
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
16h AUX Volume AM X X LAV4 LAV3 LAV2 LAV1 LAV0 RM* X X RAV4 RAV3 RAV2 RAV1 RAV0 8808h
*For AC 97 compatibility, Bit D7 (RM) is only available by setting the MSPLT bit Register 76h. The MSPLT bit enables separate mute bits for the left and right
channels. If MSPLT is not set, RM bit has no effect.
RAV[4:0]
RM
LAV[4:0]
AM
Right AUX Volume: Allows setting the AUX right channel attenuator in 32 volume levels. The LSB represents
1.5 dB, and the range is +12 dB to 34.5 dB. The default value is 0 dB, mute enabled.
Right Channel Mute: Once enabled by the MSPLT Bit in Register 76h, this bit mutes the right channel separately
from the AM bit. Otherwise, this bit will always read 0and will have no effect when set to 1.
Left AUX Volume: Allows setting the AUX left channel attenuator in 32 volume levels. The LSB represents
1.5 dB, and the range is +12 dB to 34.5 dB. The default value is 0 dB, mute enabled.
AUX Mute: When this bit is set to 1,both L/R channels are muted unless the MSPLT Bit in Register 76h is set
to 1,in which case this mute bit will only affect the left channel.
PCM Out Volume (Index 18h)
Reg Num Name
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
18h PCM Out Vol OM X X LOV4 LOV3 LOV2 LOV1 LOV0 RM* X X ROV4 ROV3 ROV2 ROV1 ROV0 8808h
*For AC 97 compatibility, Bit D7 (RM) is only available by setting the MSPLT bit Register 76h. The MSPLT bit enables separate mute bits for the left and right
channels. If MSPLT is not set, RM bit has no effect.
ROV[4:0]
RM
LOV[4:0]
OM
Right PCM Out Volume: Allows setting the PCM right channel attenuator in 32 volume levels. The LSB represents
1.5 dB, and the range is +12 dB to 34.5 dB. The default value is 0 dB, mute enabled.
Right Channel Mute: Once enabled by the MSPLT Bit in Register 76h, this bit mutes the right channel separately
from the OM bit. Otherwise, this bit will always read 0and will have no effect when set to 1.
Left PCM Out Volume: Allows setting the PCM left channel attenuator in 32 volume levels. The LSB represents
1.5 dB, and the range is +12 dB to 34.5 dB. The default value is 0 dB, mute enabled.
PCM Out Volume Mute: When this bit is set to 1,both L/R channels are muted unless the MSPLT Bit in
Register 76h is set to 1,in which case this mute bit will only affect the left channel.
Mute
0
0
0
1
Volume Table (Index 0Ch to 18h)
x4...x0
Function
00000
01000
11111
xxxxx
+12 dB Gain
0 dB Gain
34.5 dB Gain
dB Gain
Record Select Control Register (Index 1Ah)
Reg Num Name
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
1Ah Record Select X X X X X LS2 LS1 LS0 X X X X X RS2 RS1 RS0 0000h
RS[2:0]
Right Record Select
LS[2:0]
Left Record Select
NOTES
Used to select the record source independently for right and left. See table for legend.
The default value is 0000h, which corresponds to MIC in.
–12–
REV. 0

12 Page





SeitenGesamt 24 Seiten
PDF Download[ AD1981A Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
AD1981AAC 97 SoundMAX CodecAnalog Devices
Analog Devices
AD1981BAC 97 SoundMAX CodecAnalog Devices
Analog Devices
AD1981BLAC 97 SoundMAX CodecAnalog Devices
Analog Devices
AD1981HDHD Audio SoundMAX CodecAnalog Devices
Analog Devices

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche