STAC9752 Datasheet, PDF (1/95 Pages) Integrated Device Technology – TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

DATASHEET
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE STAC9752/9753
DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING
Description
IDT's STAC9752/9753 are general purpose 20-bit, full
duplex, audio CODECs conforming to the analog
component specification of AC'97 (Audio CODEC 97
Component Specification Rev. 2.3). The STAC9752/9753
incorporate IDT's proprietary Σ∆ technology to achieve a
DAC SNR in excess of 90dB. 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
STAC9752/9753 include digital output capability for support
of modern PC systems with an output that supports the
SPDIF format. The STAC9752/9753 are standard
2-channel stereo CODECs. With IDT’s headphone
capability, headphones can be driven without an external
amplifier. The STAC9752/9753 may be used as a
secondary or tertiary CODECs, with STAC9700/21/44/56/
08/84/50/66 as the primary, in a multiple CODEC
configuration conforming to the AC'97 Rev. 2.3
specification. This configuration can provide the true
six-channel, AC-3 playback required for DVD applications.
The STAC9752/9753 communicate via the five AC-Link
lines to any digital component of AC'97, providing flexibility
in the audio system design. Packaged in an AC'97
compliant 48-pin TQFP, the STAC9752/9753 can be placed
on the motherboard, daughter boards, PCI, AMR, CNR,
MDC or ACR cards.
Features
• High performance Σ∆ technology
• AC’97 Rev 2.3 compliant
• 20-bit full duplex stereo ADCs, DACs
• Independent sample rates for ADCs & DACs
• 5-wire AC-Link protocol compliance
• 20-bit SPDIF Output
• Internal Jack Sensing on Headphone and Line_Out
• Internal Microphone Input Sensing
• Digital PC Beep Option
• Extended AC’97 2.3 Paging Registers
• Adjustable VREF amplifier
• Digital-ready status
• General purpose I/Os
• Crystal Elimination Circuit
• Headphone drive capability (50 mW)
• 0dB, 10dB, 20dB, and 30dB microphone boost
capability
• +3.3 V (STAC9753) and +5 V (STAC9752) analog
power supply options
• Pin compatible with the STAC9700, STAC9721,
STAC9756
• 100% pin compatible with STAC9750 and
STAC9766
• IDT Surround (SS3D) Stereo Enhancement
• Energy saving dynamic power modes
• Multi-CODEC option (Intel AC'97 rev 2.3)
• Six analog line-level inputs
• 90dB SNR Line to Line
• SNR > 89dB through Mixer and DAC
IDT™
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STAC9752/9753
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING
V 3.3 101006