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부품번호 STAC9767 기능
기능 (STAC9766 / STAC9767) TWO-CHANNEL AC97 2.3 CODECS
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STAC9767 데이터시트, 핀배열, 회로
www.DataSheet4U.com
DATASHEET
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH
STEREO MICROPHONE AND MIC/JACK SENSING
STAC9766/9767
FEATURES
RELATED MATERIALS
• This datasheet is for Rev. CC1 Parts and Beyond
• High Performance Σ∆ Technology
• AC’97 Rev 2.3 Complaint
• 20-bit Full Duplex Stereo ADC & DACs
• Independent Sample Rates for ADC & DACs
• 5-Wire AC-Link Protocol Compliance
• 20-bit SPDIF Output
• Full Stereo Microphone Pre-Amp
• Internal Jack Sensing on Headphone & Line_Out
• Internal Microphone Input Sensing
• Digital PC Beep Option
• Extended AC’97 2.3 Paging Registers
• Digital-ready Status
• General Purpose I/O
• Crystal Elimination Circuit
• Headphone Drive Capability (50 mW)
• 0dB, 10dB, 20dB and 30dB Microphone Boost
Capability
• +3.3 V (STAC9767) and +5 V (STAC9766) Analog
Power Supply Options
• Pin Compatible with STAC9700/21/56
• 100% Compatible with STAC9750/52
• IDT Surround (SS3D) Stereo Enhancement
• Energy Saving Dynamic Power Modes
• Multi-CODEC Option (Intel AC'97 rev 2.3)
• Six Analog Line-level Inputs
• 103dB SNR LINE-LINE
KEY SPECIFICATIONS
• Analog LINE_OUT SNR: 103 dB
• Digital DAC SNR: 95 dB
• Digital ADC SNR: 85 dB
• Full-scale Total Harmonic Distortion: 0.002%
• Crosstalk Between Input Channels: -70 dB
• Spurious Tone Rejection: 100 dB
• Data Sheet
• Reference Designs
DESCRIPTION
IDT's STAC9766/9767 (Revision CC1 and beyond) are
general purpose 20-bit, full duplex, audio CODECs con-
forming to the analog component specification of AC'97
(Audio CODEC 97 Component Specification Rev. 2.3).
The STAC9766/9767incorporates IDT's proprietary Σ∆
technology The AC’97 CODEC is designed to achieve a
DAC SNR in excess of 103dB.
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 STAC9766/9767 includes digital
input/output capability for support of modern PC systems
with an output that supports the SPDIF format.
The STAC9766/9767 is a standard 2-channel stereo
CODEC. With IDT’s headphone drive capability, head-
phones can be driven with without an external amplifier.
The STAC9766/9767may be used as a secondary
CODEC, with the STAC9700/21/56/08/84/50/52 as the pri-
mary, in a multiple CODEC configuration conforming to the
AC'97 Rev. 2.3 specification. This configuration can pro-
vide the true six-channel, AC-3 playback required for DVD
applications.
The STAC9766/9767 communicates via the five-wire
AC-Link to any digital component of AC'97, providing flexi-
bility in the audio system design.
Packaged in an AC'97 compliant 48-pin TQFP, the
STAC9766/9767 can be placed on a motherboard, daugh-
ter boards, PCI, AMR, CNR, MDC or ACR cards.
The STAC9766/9767provides variable sample rate Digi-
tal-to-Analog (DA) and Analog-to-Digital (AD) conversion,
mixing and analog processing.
Supported audio sample rates include 48KHz, 44.1KHz,
32KHz, 22.05KHz, 16KHz, 11.025KHz, and 8 KHz; addi-
tional rates are supported in the STAC9766/9767 soft
audio drivers. All ADCs and DACs operate at 20-bit resolu-
tion.
The STAC9766/9767 includes full Stereo Microphone
IDT™
1
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
STAC9766/9767
V 7.4 12/06




STAC9767 pdf, 반도체, 판매, 대치품
STAC9766/9767
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
PC AUDIO
List of Figures
Figure 1. Block Diagram .................................................................................................................................. 8
Figure 2. Cold Reset Timing ......................................................................................................................... 13
Figure 3. Warm Reset Timing ........................................................................................................................13
Figure 4. Clocks Timing ................................................................................................................................ 14
Figure 5. Data Setup and Hold Timing ......................................................................................................... 15
Figure 6. Signal Rise and Fall Times Timing ................................................................................................ 15
Figure 7. AC-Link Low Power Mode Timing .................................................................................................. 16
Figure 8. ATE Test Mode Timing ..................................................................................................................16
Figure 9. Typical Connection Diagram .......................................................................................................... 17
Figure 10. Split Independent Power Supply Operation ................................................................................. 19
Figure 11. AC-Link to its Companion Controller ........................................................................................... 20
Figure 12. CODEC Clock Source Detection ................................................................................................. 21
Figure 13. STAC9766/9767 Powerdown Timing .......................................................................................... 24
Figure 14. Bi-directional AC-link Frame with Slot Assignments ....................................................................27
Figure 15. AC-Link Audio Output Frame ...................................................................................................... 31
Figure 16. Start of an Audio Output Frame ................................................................................................... 31
Figure 17. STAC9766/9767 Audio Input Frame ........................................................................................... 34
Figure 18. Start of an Audio Input Frame ..................................................................................................... 35
Figure 19. Bi-directional AC-link Frame with Slot assignments ....................................................................39
Figure 20. STAC9766 2-Channel Mixer Functional Diagram .......................................................................42
Figure 21. STAC9767 2-Channel Mixer Functional Diagram .......................................................................42
Figure 22. Example of STAC9766/9767 Powerdown/Powerup Flow ...........................................................81
Figure 23. Powerdown/Powerup Flow With Analog Still Alive .......................................................................82
Figure 24. Pin Description Drawing ............................................................................................................... 87
Figure 25. 48-Pin LQFP Package Outline and Package Dimensions ...........................................................91
Figure 26. Solder Reflow Profile ................................................................................................................... 92
IDT™
4
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
STAC9766/9767
V 7.4 12/06

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STAC9767 전자부품, 판매, 대치품
STAC9766/9767
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
PC AUDIO
AC-Link to any digital component of AC'97 providing flexibility in the audio system design. Packaged
in an AC'97 compliant 48-pin TQFP, the STAC9766/9767 can be placed on a motherboard, daughter
boards, PCI, AMR, CNR, MDC or ACR cards.
The STAC9766/9767 block diagram is illustrated in Figure 1. It provides variable sample rate Digi-
tal-to-Analog (DA) and Analog-to-Digital (AD) conversion, mixing, and analog processing. Supported
audio sample rates include 48KHz, 44.1KHz, 32 KHz, 22.05KHz, 16KHz, 11.025KHz, and 8KHz;
additional rates are supported in the STAC9766/9767 soft audio drivers. All ADCs and DACs oper-
ate at 20-bit resolution.
Two 20-bit DACs convert the digital stereo PCM-out content to audio. The MIXER block combines
the PCM_OUT with any analog sources to drive the LINE_OUT and HP_OUT outputs. The
MONO_OUT delivers either microphone only, or a mono mix of sources from the MIXER. The stereo
variable sample rate 20-bit ADCs provide record capability for any mix of mono or stereo sources,
and deliver a digital stereo PCM-in signal back to the AC-Link. The microphone input and mono mix
input can be recorded simultaneously, thus allowing for an all digital output in support of the digital
ready initiative. For a digital ready record path, the microphone is connected to the left channel ADC
while the mono output of the stereo mixer is connected to right channel ADC.
The STAC9766/9767 includes full Stereo Microphone Pre-Amp support and can be used with the
10dB, 20dB and 30dB Microphone Boost options. This integration allows for additional cost savings
and options.
The STAC9766/9767 includes jack sensing on the Headphone and Line_Out. The STAC9766/9767
jack sense can detect the presence of devices on the Headphone and Line Outputs and on both Mic
inputs. With proprietary IDT current- and impedance-sensing techniques, the impedance load on the
Headphone and Line Outputs can also be detected. The GPIOs on the STAC9766/9767 remain
available for advanced configurations.
The STAC9766/9767 implementation of jack sense uses the Extended Paging Registers defined by
the AC'97 2.3 Specification. This allows for additional registry space to hold the identification infor-
mation about the CODEC, the jack sensing details and results, and the external surroundings of the
CODEC. The information within the Extended Paging Registers will allow for the automatic configu-
ration of the audio subsystem without end-user intervention. For example, the BIOS can populate
the Extended Paging Registers with valuable information for both the audio driver and the operating
system such as gain and attenuation stages, input population and input phase. With this input infor-
mation, the IDT driver will automatically provide to the Volume Control Panel only the volume sliders
that are implemented in the system, thus improving the end-user's experience with the PC.
The information in the Extended Paging Registers will also allow for automatic configuration of
microphone inputs, the ability to switch between SPDIF and analog outputs, the routing of the mas-
ter volume slider to the proper physical output, and SoftEQ configurations. The fully parametric IDT
SoftEQ can be initiated upon jack insertion and sensed impedance levels.
The STAC9766/9767 also offers two styles of PC BEEP, Analog and Digital. The digital PC BEEP is
a new feature added to the AC’97 Specification Rev 2.3.
The STAC9766/9767 is designed primarily to support stereo (2-speaker) audio. True AC-3 playback
can be achieved for 6-speaker applications by taking advantage of the multi-CODEC option avail-
able in the STAC9766/9767 to support multiple CODECs in an AC'97 architecture. Additionally, the
IDT™
7
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
STAC9766/9767
V 7.4 12/06

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관련 데이터시트

부품번호상세설명 및 기능제조사
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(STAC9766 / STAC9767) TWO-CHANNEL AC97 2.3 CODECS

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(STAC9766 / STAC9767) TWO-CHANNEL AC97 2.3 CODECS

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