STAC9766 Datasheet, PDF (1/97 Pages) Integrated Device Technology – TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING

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 STAC9766/9767 incorporates 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 STAC9766/9767 may 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 STAC9766/9767 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,
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™
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TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
STAC9766/9767
V 7.4 12/06