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PDF STAC9704 Data sheet ( Hoja de datos )
| Número de pieza | STAC9704 | |
| Descripción | (STAC9707) Multimedia Audio Codec for AC97 | |
| Fabricantes | Hynix Semiconductor | |
| Logotipo |  |
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SigmaTel, Inc.
Integrating Mixed-Signal Solutions
STAC9704/7
Multimedia Audio Codec for AC’97
GENERAL DESCRIPTION:
SigmaTel’s STAC9704/07 is a general purpose 18-bit, full duplex, audio codec that conforms to the analog
component specification of AC’97 (Audio Codec ’97 Component Specification rev. 1.03). The STAC9704/07
incorporates SigmaTel’s proprietary Sigma-Delta technology to achieve signal quality in excess of 95dB SNR.
The DACs, ADCs, and mixers are integrated with analog I/Os, which include four analog line-level stereo inputs,
two analog line-level mono inputs, and 3 output channels. Also included are SigmaTel’s 3D stereo enhancement
(SS3D) and an extra true line-level out for headphones or speaker amplifiers. The STAC9704/07 communicates
via the five wire AC Link to any digital component of AC’97 providing flexibility in the audio system design.
Packaged in a small AC’97 compliant 48-pin TQFP, the STAC9704/07 can be placed on the motherboard,
daughter boards, add-on cards, PCMCIA cards, or outside the main chassis such as in a speaker. The 9707 is
identical to the 9704 except that the 9707 is tested at AVdd = DVdd = 3.3V.
FEATURES:
• High performance Σ ∆ technology
• 18-bit full duplex stereo A/D, D/A
• AC-link protocol compliance
• Single power source from 5V to 3.3V
• AC'97 compliant mixer
• SigmaTel Surround (SS3D) Stereo
Enhancement
• Energy saving power down modes
• 48k sample/second rate
• Six analog line-level inputs
• 48-pin TQFP
• SNR > 95 dB through Mixer and DAC
• STAC9707 is the 3.3 volt version
1 10/02/98
1 page  
SigmaTel, Inc
Figure 1 – Package Outline
D
D1
E E1
26
38
SigmaTel
STAC9704/7
48 pin TQFP
2
14
a
e
STAC9704/7
Table 1 - Package Dimensions
KEY
D
D1
E
E1
a (lead width)
e (pitch)
thickness
9704/7 DIMENSION
TQFP
9.00 mm
7.00 mm
9.00 mm
7.00 mm
0.20 mm
0.50 mm
1.4 mm
Table 2 - Pin Designation
PIN SIGNAL PI
#
NAME
N#
1
DVdd1
13
2
XTL_IN
14
3 XTL_OUT 15
4
DVss1
16
5 SDATA_OUT 17
6
BIT_CLK
18
7
DVss2
19
8 SDATA_IN 20
9
DVdd2
21
10
SYNC
22
11 RESET# 23
12 PC_BEEP 24
# denotes active low
SIGNAL
NAME
PHONE
AUX_L
AUX_R
VIDEO_L
VIDEO_R
CD_L
CD_GND
CD_R
MIC1
MIC2
LINE_IN_L
LINE_IN_R
PIN SIGNAL PIN SIGNAL
# NAME # NAME
25 AVdd1 37 MONO_OUT
26 AVss1 38 AVdd2
27 Vref 39 LNLVL_OUT_L
28 Vrefout 40
NC
29 AFILT1 41 LNLVL_OUT_R
30 AFILT2 42
AVss2
31 NC 43 NC
32 CAP2 44
NC
33 NC 45 NC
34 NC 46 NC
35 LINE_OUT_L 47
NC
36 LINE_OUT_R 48
NC
5 10/02/98
5 Page 
SigmaTel, Inc.
STAC9704/7
1.4 Power and Ground Signals
Table 6. Power Signal List STAC9704/7
SIGNAL NAME
AVdd1
AVdd2
AVss1
AVss2
DVdd1
DVdd2
DVss1
DVss2
TYPE
I
I
I
I
I
I
I
I
STAC9704
Analog Vdd = 5.0V
Analog Vdd = 5.0V
Analog Gnd
Analog Gnd
Digital Vdd = 5.0V or 3.3V
Digital Vdd = 5.0V or 3.3V
Digital Gnd
Digital Gnd
STAC9707
Analog Vdd = 3.3V
Analog Vdd = 3.3V
Analog Gnd
Analog Gnd
Digital Vdd = 3.3V
Digital Vdd = 3.3V
Digital Gnd
Digital Gnd
2. AC-LINK
Below is the figure of the AC-link point to point serial interconnect between the STAC9704/7 and its companion
controller. All digital audio streams and command/status information are communicated over this AC-link.
Please refer to the “Digital Interface” section 3 for details.
Figure 4. STAC9704/7’s AC97-link to its companion controller
Digital
DC’97
Controller
SYNC
BIT_CLK
SDATA_OUT
SDATA_IN
RESET
11
XTAL_IN
STAC9704/7
XTAL_OUT
10/02/98
11 Page | ||
| Páginas | Total 49 Páginas | |
| PDF Descargar | [ Datasheet STAC9704.PDF ] | |
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