STAC9752A Datasheet, PDF (22/106 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
3.2.
STAC9752A/9753A Typical Connection Diagram for 32-pad QFN
Figure 10. STAC9752A/9753A Typical Connection Diagram 32-pad QFN
*OPTIONAL
2 Ω*
Ferrite Bead
3.3V ± 5%
10 µF
0.1 µF
1 µF 0.1 µF
1
XTL_IN
26
AVdd2
9
DVdd2
EMI
Filter
22 Ω
27 pF
TUNE TO LAYOUT
LINK PINS
1 µF*
*OPTIONAL
820 pF
FILTER PINS
820 pF
STANDARD
ANALOG I/O
2
SDATA_OUT
3 _{BIT_CLK}
5
SDATA_IN
7
SYNC
8
RESET#
22 _CAP2
0.1 µF
20
AFILT1
21
AFILT2
STAC9753A
(3.3V Analog)
in 32-pad QFN
9 _PHONE
10
CD_L
11 _{CD_GND}
12 _{CD_R}
25 _{MONO_OUT}
AVss1
17
AVss2 DVss1
29 4
DVss2
7
GPIO ³⁰
EAPD/GPIO ³¹
SPDIF_OUT ³²
19
VREFOUT
18
VREF
SPDIF and
GPIO PINS
1 µF
VREF PINS
13
MIC1
14
MIC2
15
LINE_IN_L
16
LINE_IN_R
23
LINE_OUT_L
24
LINE_OUT_R
HP_OUT_L ²⁷
28
HP_OUT_R
UNIVERSAL
JACKS^TM
PINS
*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 bad distortion. If there is no analog CD
input, then this pin can be No-Connect.
IDT™
22
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
STAC9752A/9753A
V 1.5 1206