STAC9752A Datasheet, PDF (21/106 Pages) Integrated Device Technology – AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK

STAC9752A/9753A
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
PC AUDIO
3. TYPICAL CONNECTION AND POWER DIAGRAMS
3.1. STAC9752A/9753A Typical Connection Diagram for 48-pin LQFP
Figure 9. STAC9752A/9753A Typical Connection Diagram 48-pin LQFP
*OPTIONAL
2 Ω*
Ferrite Bead
3.3V ± 5%
1 µF*
*OPTIONAL
820 pF
820 pF
0.1 µF
1 µF
0.1 µF
0.1 µF
25
AVdd1
38
AVdd2
12
PC_BEEP
13
PHONE
14
AUX_L
15
AUX_R
16
VIDEO_L
17
VIDEO_R
18
CD_L
19
CD_GND
20
CD_R
21
MIC1
22
MIC2
23
LINE_IN_L
24
LINE_IN_R
32
CAP2
0.1 µF
STAC9753
29
AFILT1
30
AFILT2
AVss1
26
AVss2 DVss1
42 4
DVss2
7
1 µF
0.1 µF
1
9
DVdd1 DVdd2
2
XTL_IN
XTL_OUT
3
(Near Clk source)
OPTIONAL
27 pF
CLOCK_IN*
*Add resistive divider
when using 5V clock.
24.576 MHz
0Ω
27 pF
5
SDATA_OUT
6
BIT_CLK
8
SDATA_IN
10
SYNC
11
RESET#
45
CID0
46
CID1
47
EAPD
28
VREFOUT
27
VREF
22 Ω
EMI
Filter
27 pF
TUNE TO LAYOUT
1 µF
31
NC
33
NC
34
NC
48
SPDIF
44
GPIO1
43
GPIO0
35
LINE_OUT_L
36
LINE_OUT_R
37
MONO_OUT
HP_OUT_L ³⁹
40
HP_COMM
41
HP_OUT_R
HP_COMM should be tied to
ground at the headphone pin.
*Terminate ground
plane as close to codec
as possible
Analog
Ground
Digital
Ground
Note: Pin 48: To Disable SPDIF, use an 1KΩ - 1 0 KΩ external pullup resistor.
Note: The CD_GND signal is an AC signal return for the two CD input channels. It is normally biased at about
2.5V. The name of the pin in the AC’97 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.
IDT™
21
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
STAC9752A/9753A
V 1.5 1206