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STAC9721 の電気的特性と機能
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STAC9721のメーカーはETCです、この部品の機能は「(STAC9721 / STAC9723) Stereo AC 97 Codec」です。 |
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製品の詳細 ( Datasheet PDF )
| 部品番号 STAC9721 |
| 部品説明 (STAC9721 / STAC9723) Stereo AC 97 Codec |
| メーカ ETC |
ロゴ |
このページの下部にプレビューとSTAC9721ダウンロード（pdfファイル）リンクがあります。 Total 30 pages |
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www.DataSheet4U.com
SigmaTel, Inc.
Integrating Mixed-Signal Solutions
DATA SHEET
STAC9721/23
Stereo AC'97 Codec
With Multi-Codec Option
GENERAL DESCRIPTION:
SigmaTel’s STAC9721/23 is a general-purpose 18-bit stereo, full duplex, audio codec that conforms to
the analog component specification of AC'97 (Audio Codec 97 Component Specification Rev. 2.1). The
STAC9721/23 incorporates SigmaTel’s proprietary Sigma-Delta technology to achieve a DAC SNR in
excess of 95dB. The DACs, ADCs, and mixer are integrated with analog I/Os, which include four analog
line-level stereo inputs, two analog line-level mono inputs, two stereo outputs, and one mono output
channel. Also included are SigmaTel’s 3D stereo enhancement (SS3D), and an extra true line-level out
for headphones or speaker amplifiers. The STAC9721/23 may be used as a secondary codec, with the
STAC9700/04/07/44/45 or a 4-channel STAC9708 as the primary, in multiple codec configurations
conforming to the AC'97 Rev. 2.1 specification. This configuration can provide up to six-channel output,
providing AC-3 playback for DVD applications. The STAC9721/23 communicates via the five-wire AC-
Link interface with any AC-Link capable controller or advanced core logic chip-set. Packaged in an
AC'97 compliant 48-pin TQFP, the STAC9721/23 can be placed on motherboards, daughter boards, add-
on cards or AMR/MDC cards.
FEATURES:
• High performance Σ∆ technology
• Energy saving power down modes
• 18-bit full duplex stereo ADC, DACs
• AC-Link protocol compliance
• 3.3V Multiple power supply options
• Pin compatible with the STAC9700/44/45
• SigmaTel Surround (SS3D) Stereo Enhancement
• EAPD – External Amplifier Power Down Control
• Multi-Codec option (Intel AC'97 rev 2.1)
• Six analog line-level inputs
• 48-pin TQFP
• LINE-to-LINE SNR 102dB
• The STAC9723 is tested at +3.3V
ORDERING INFORMATION:
PART
NUMBER
STAC9721T
STAC9723T
PACKAGE
48-pin TQFP 7mm x7mm x 1.4mm
48-pin TQFP 7mmx7mm x 1.4mm
TEMPERATURE
RANGE
0o C to +70o C
0o C to +70o C
SUPPLY RANGE
DVdd = 3.3V or 5V, AVdd = 5V
DVdd = 3.3V, AVdd = 3.3V
SigmaTel reserves the right to change specifications without notice
1 04/07/00
1 Page
SigmaTel, Inc.
Data Sheet
STAC9721
Table 21. Cold Reset
33
Table 22. Warm Reset
34
Table 23. Clocks
34
Table 24. Data Setup and Hold
35
Table 25. Signal Rise and Fall Times
35
Table 26. AC-Link Low Power Mode Timing 36
Table 27. ATE Test Mode
37
Table 28. Operating Conditions
38
Table 33: Power Consumption 39
Table 34: Power Consumption at 3.3V Analog 39
Table 35: Reduced Analog Power Settings
40
Table 30. AC-Link Static Specifications
41
Table 31. Analog Performance Characteristics 41
Table 32. Analog Performance Characteristics 43
Table of Contents – Figures
Figure 1. Package Outline ..................................... 4
Figure 2. STAC9721/23 Block Diagram............... 5
Figure 3. AC-Link to its companion controller .. 10
Figure 4. Bi-directional Audio Frame ................. 12
Figure 5. AC-Link Audio Output Frame .......... 12
Figure 6. Start of an Audio Output Frame ....... 13
Figure 7. STAC9721/23 Audio Input Frame ..... 16
Figure 8. Start of an Audio Input Frame ........... 16
Figure 9. STAC9721/23 Powerdown Timing ..... 18
Figure 10. STAC9721/23 Mixer ......................... 19
Figure 11. Powerdown/Powerup flow.................. 29
Figure 12. Powerdown/Powerup flow ................. 30
Figure 13. Cold Reset........................................... 33
Figure 14. Warm Reset ........................................ 34
Figure 15. Clocks.................................................. 34
Figure 16. Data Setup and Hold.......................... 35
Figure 17. Signal Rise and Fall Times ................ 35
Figure 18. AC-Link Low Power Mode Timing.. 36
Figure 19. ATE Test Mode .................................. 37
3 04/07/00
04/07/00
3Pages
SigmaTel, Inc.
Data Sheet
STAC9721
Figure 3. Connection Diagram –
See Appendix A for an alternative connection diagram when using separate supplies.
See Appendix B for specific connection requirements prior to operation.
2 ohm * Ferrite Bead * * Suggested
3.3V or 5V ± 5%
0.1uF
1uF
0.1uF
0.1uF
10uF
0.1uF
25
AVdd1
38
AVdd2
1
DVdd1
9
DVdd2
XTL_IN
2
12 PC_BEEP
13
PHONE
14
AUX_L
15
AUX_R
16
VIDEO_L
17
VIDEO_R
18 CD_L
SigmaTel
STAC9721/23
XTL_OUT 3
SDATA_OUT
BIT_CLK
SDATA_IN
SYNC
RESET
CID0
CID1
5
6
8
10
11
45
46
27pF
24.576MHz
27pF
22 ohms
EMI
Filter
27pF
0.1uF
19 CD_GND
20
CD_R
21
MIC1
22
MIC2
23 LINE_IN_L
24 LINE_IN_R
32
CAP2
1uF
27
Vref
0.1uF
28
Vrefout
1uF
31
CAP1
33
CAP3
APOP 34
EAPD
LINE_OUT_L
47
35
Optional Anti-Pop Circuit
100uF
10uF
820pF
29 AFILT1
820pF
30
AFILT2
AVss1
26
NOTE: Pins 31, 33, 34, 40
43, 44, and 48 are No Connects
36
LINE_OUT_R
37
MONO_OUT
AVss2 DVss1
42 4
DVss2 LNLVL_OUT_L
7 39
LNLVL_OUT_R
41 ** Teminate ground
plane as close to power
supply as possible
Analog Gnd
Digital Gnd
6 04/07/00
04/07/00
6 Page
合計 : 30 ページ |
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| 部品番号 | 部品説明 | メーカ |
| STAC9721 | (STAC9721 / STAC9723) Stereo AC 97 Codec | ETC |
| STAC9723 | (STAC9721 / STAC9723) Stereo AC 97 Codec | ETC |