IDTSTAC9766XXTAEC1X IDT, Integrated Device Technology Inc, IDTSTAC9766XXTAEC1X Datasheet - Page 89

• Manufacturer Part Number: IDTSTAC9766XXTAEC1X
• Description: IC CODEC AC'97 2CH 2.3 48-TQFP
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Audio Codec '97r

Specifications of IDTSTAC9766XXTAEC1X

• Data Interface: Serial
• Resolution (bits): 20 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• S/n Ratio, Adcs / Dacs (db) Typ: 85 / 95
• Voltage - Supply, Analog: 3.14 V ~ 3.47 V; 4.75 V ~ 5.25 V
• Voltage - Supply, Digital: 3.14 V ~ 3.47 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP, 48-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: STAC9766XXTAEC1X

IDT™
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
STAC9766/9767
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
13.3. Analog I/O
These signals connect the STAC9766/9767 to analog sources and sinks, including microphones and
speakers.
Note: * Any unused input pins should be tied together through a capacitor (0.1 µF suggested) to
ground, except the MIC inputs which should have their own capacitor to ground if not used.
Note:
biased at about 2.5V. The name of the pin in the AC97 specification is CD_GND, and this has
confused many designers. It should not have any DC path to GND. Connecting the CD_GND
signal directly to ground will change the internal bias of the entire CODEC, and cause significant
distortion. If there is no analog CD input, then this pin can be No-Connect.
LINE_OUT_R
LINE_OUT_L
MONO_OUT
HP_OUT_R
HP_OUT_L
LINE_IN_R
HP_COMM
LINE_IN_L
CD_GND
Pin Name
PC-BEEP
VIDEO_R
VIDEO_L
PHONE
AUX_R
AUX_L
CD_R
CD_L
MIC1
MIC2
†
The CD_GND signal is an AC signal return for the two CD input channels. It is normally
†
Pin #
12
13
14
15
16
17
18
19
20
21
22
23
24
35
36
37
39
40
41
Table 37. Analog Connection Signals
Type
O
O
O
O
O
O
I*
I*
I*
I*
I*
I*
I*
I*
I*
I*
I*
I*
I*
89
PC Speaker beep pass-through
From telephony subsystem speakerphone
Aux Left Channel
Aux Right Channel
Video Audio Left Channel
Video Audio Right Channel
CD Audio Left Channel
CD Audio analog signal return
CD Audio Right Channel
Desktop Stereo or Mono Microphone Input
Stereo or Second Mono Microphone Input
Line In Left Channel
Line In Right Channel
Line Out Left Channel
Line Out Right Channel
To telephony subsystem speakerphone
Headphone Out Left Channel
Headphone Ground Return
Headphone Out Right Channel
STAC9766/9767
Description
†
PC AUDIO
V 7.4 12/06