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STAC9751 PDF даташит

Спецификация STAC9751 изготовлена ​​​​«IDT» и имеет функцию, называемую «(STAC9750 / STAC9751) VALUE-LINE TWO-CHANNEL AC97 CODECS».

Детали детали

Номер произв STAC9751
Описание (STAC9750 / STAC9751) VALUE-LINE TWO-CHANNEL AC97 CODECS
Производители IDT
логотип IDT логотип 

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STAC9751 Даташит, Описание, Даташиты
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VALUE-LINE TWO-CHANNEL AC’97 CODECS
DATASHEET
STAC9750/9751
OVERVIEW
Value-Line Stereo AC'97 CODECs with headphone drive
and SPDIF outputs.
FEATURES
• Full Duplex Stereo 18-bit ADCs and 20-bit DACs
• AC’97 Rev 2.2 Compliant
• High Performance Σ∆ Technology
• SPDIF Output
• Crystal Elimination Circuit
• Headphone amplifier
• Independent Sample Rates for ADCs & DACs
(hardware SRCs)
• 20dB or 30dB Microphone Boost Capability
• 90dB SNR LINE-LINE
• 5-Wire AC-Link Protocol Compliance
• Digital-Ready Architecture
• General Purpose I/O
• +3.3 V (STAC9751) and +5 V (STAC9750) Analog
Power Supply Options
• Pin Compatible With STAC9700/21/56/66
• IDT Surround (SS3D) Stereo Enhancement
• Energy Saving Dynamic Power Modes
KEY SPECIFICATIONS
• Analog LINE_OUT SNR: 90dB
• Digital DAC SNR: 89dB
• Digital ADC SNR: 85dB
• Full-scale Total Harmonic Distortion: 0.005%
• Crosstalk between Input Channels: -70dB
• Spurious Tone Rejection: 100dB
RELATED MATERIALS
• Data Sheet
• Reference Designs for MB, CNR, ACR and PCI
applications
• Audio Precision Performance Plots
DESCRIPTION
IDT's STAC9750/9751 are general purpose, full duplex,
audio CODECs conforming to the analog component spec-
ification of AC'97 (Audio CODEC 97 Component Specifica-
tion Rev. 2.2). They have 18-bit ADCs and 20-bit DACs.
The STAC9750/9751 incorporate IDT's proprietary Σ∆ tech-
nology to achieve a DAC SNR in excess of 89dB.
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.
The STAC9750/9751 include digital input/output capability
for support of modern PC systems and also an output that
supports the SPDIF format.
The STAC9750/9751 is a standard 2-channel stereo
CODEC. With IDT’s headphone drive capability, head-
phones can be driven with no external amplifier.
The STAC9750/9751 may be used as a secondary
CODEC, with the STAC9700/21/44/56/08/84/66 as the pri-
mary, in a multiple CODEC configuration conforming to the
AC'97 Rev. 2.2 specification. This configuration can provide
the true six-channel, AC-3 playback required for DVD appli-
cations.
The STAC9750/9751 communicates via the five-wire
AC-Link to any digital component of AC'97, providing flexi-
bility in the audio system design.
The STAC9750/9751 supports General Purpose Input/Out-
put (GPIO), as well as SPDIF output. These digital I/O
options provide for a number of advanced architectural
implementations, with volume controls and digital mixing
capabilities built directly into the CODEC.
Packaged in an AC'97 compliant 48-pin TQFP, the
STAC9750/9751 can be placed on the motherboard,
daughter boards, PCI, AMR, CNR, or ACR cards.
IDT™
VALUE-LINE TWO-CHANNEL AC’97 CODECS
1
STAC9750/9751
V 5.8 103106









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STAC9751 Даташит, Описание, Даташиты
STAC9750/9751
VALUE-LINE TWO-CHANNEL AC’97 CODECS
PC AUDIO
TABLE OF CONTENTS
1. PRODUCT BRIEF ...................................................................................................................... 5
1.1. Features ............................................................................................................................................ 5
1.2. Description ........................................................................................................................................ 5
1.3. STAC9750/9751 Block Diagram ........................................................................................................ 6
1.4. Key Specifications ............................................................................................................................. 7
1.5. Related Materials .............................................................................................................................. 7
1.6. Additional Support ............................................................................................................................. 7
2. CHARACTERISTICS/SPECIFICATIONS .................................................................................. 8
2.1. Electrical Specifications ..................................................................................................................... 8
2.2. AC Timing Characteristics ............................................................................................................... 15
3. TYPICAL CONNECTION DIAGRAM ....................................................................................... 19
4. AC-LINK ................................................................................................................................... 20
4.1. Clocking ........................................................................................................................................... 20
4.2. Reset ............................................................................................................................................... 20
5. DIGITAL INTERFACE .............................................................................................................. 21
5.1. AC-Link Digital Serial Interface Protocol ......................................................................................... 21
5.2. AC-Link Low Power Mode ............................................................................................................... 29
5.3. Waking up the AC-Link .................................................................................................................... 30
6. STAC9750/9751 MIXER .......................................................................................................... 31
6.1. Analog Mixer Input .......................................................................................................................... 33
6.2. Analog Mixer Output ........................................................................................................................ 33
6.3. SPDIF Digital Mux ........................................................................................................................... 33
6.4. PC Beep Implementation ................................................................................................................ 33
6.5. Programming Registers ................................................................................................................... 34
7. LOW POWER MODES ............................................................................................................56
8. MULTIPLE CODEC SUPPORT ...............................................................................................58
8.1. Primary/Secondary CODEC Selection ............................................................................................ 58
8.2. Secondary CODEC Register Access Definitions ............................................................................. 59
9. TESTABILITY .......................................................................................................................... 60
10. PIN DESCRIPTION ................................................................................................................ 61
10.1. Digital I/O ....................................................................................................................................... 62
10.2. Analog I/O ..................................................................................................................................... 63
10.3. Filter/References/GPIO ................................................................................................................. 64
10.4. Power and Ground Signals ........................................................................................................... 64
11. ORDERING INFORMATION .................................................................................................. 65
12. PACKAGE DRAWINGS ......................................................................................................... 66
12.1. 48-Pin LQFP .................................................................................................................................. 66
13. SOLDER REFLOW PROFILE ...............................................................................................67
13.1. Standard Reflow Profile Data ........................................................................................................ 67
13.2. Pb Free Process - Package Classification Reflow Temperatures ................................................. 68
14. APPENDIX A: SPLIT INDEPENDENT POWER SUPPLY OPERATION .............................. 69
15. APPENDIX B: PROGRAMMING REGISTERS .....................................................................71
16. REVISION HISTORY ............................................................................................................. 72
IDT™
VALUE-LINE TWO-CHANNEL AC’97 CODECS
2
STAC9750/9751
V 5.8 103106









No Preview Available !

STAC9751 Даташит, Описание, Даташиты
STAC9750/9751
VALUE-LINE TWO-CHANNEL AC’97 CODECS
PC AUDIO
LIST OF FIGURES
Figure 1. STAC9750/9751 Block Diagram ...................................................................................................... 6
Figure 2. Cold Reset Timing ......................................................................................................................... 15
Figure 3. Warm Reset Timing ....................................................................................................................... 15
Figure 4. Clocks Timing ................................................................................................................................ 16
Figure 5. Data Setup and Hold Timing ......................................................................................................... 17
Figure 6. Signal Rise and Fall Times Timing ................................................................................................ 17
Figure 7. AC-Link Low Power Mode Timing ................................................................................................. 18
Figure 8. ATE Test Mode Timing .................................................................................................................. 18
Figure 9. STAC9751 Typical Connection Diagram ....................................................................................... 19
Figure 10. AC-Link to its Companion Controller ........................................................................................... 20
Figure 11. AC'97 Standard Bi-directional Audio Frame ................................................................................ 22
Figure 12. AC-Link Audio Output Frame ...................................................................................................... 22
Figure 13. Start of an Audio Output Frame ................................................................................................... 23
Figure 14. STAC9750/9751 Audio Input Frame ........................................................................................... 26
Figure 15. Start of an Audio Input Frame ..................................................................................................... 26
Figure 16. STAC9750/9751 Powerdown Timing ......................................................................................... 29
Figure 17. STAC9750 2-Channel Mixer Functional Diagram .................................................................. 31
Figure 18. STAC9751 2-Channel Mixer Functional Diagram ....................................................................... 32
Figure 19. Example of STAC9750/9751 Powerdown/Powerup Flow ........................................................... 56
Figure 20. STAC9750/9751 Powerdown/Powerup Flow With Analog Still Active ........................................ 57
Figure 21. STAC9750/9751 Pin Description Drawing ................................................................................... 61
Figure 22. Package Drawing - 48-pin LQFP .................................................................................................. 66
Figure 23. Reflow Profile .............................................................................................................................. 67
Figure 24. STAC9750/9751 Split Independent Power Supply Operation Typical Connection Diagram ....... 70
IDT™
VALUE-LINE TWO-CHANNEL AC’97 CODECS
3
STAC9750/9751
V 5.8 103106










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