STAC9752A Datasheet, PDF (1/106 Pages) Integrated Device Technology – AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK

DATASHEET
AC’97 2.3 CODECS WITH STEREO
MICROPHONE & UNIVERSAL JACK
FEATURES
• 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
• Universal Jacks^™
• 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
• General Purpose I/Os and Crystal Elimination
Circuit
• Headphone Drive Capability (50 mW per channel)
• Switchable Headphone Out (pins 39/41 or 35/36)
• 0dB, 10dB, 20dB and 30dB Microphone Boost
Capability
• +3.3 V (STAC9753A) and +5 V (STAC9752A) Analog
Power Supply Options
• Pin Compatible with STAC9750/52/66
KEY SPECIFICATIONS
• Analog LINE_OUT SNR: 94dB
• Digital DAC SNR: 92dB
• Digital ADC SNR: 85dB
• Full-scale Total Harmonic Distortion: 0.002%
• Crosstalk Between Input Channels: -70dB
• Spurious Tone Rejection: 100dB
• Stereo Microphone Input
RELATED MATERIALS
• Data Sheet
STAC9752A/9753A
• Reference Designs
DESCRIPTION
IDT's STAC9752A/9753A are general purpose 20-bit, full
duplex, audio CODECs conforming to the analog compo-
nent specification of AC'97 (Audio CODEC 97 Component
Specification Rev. 2.3). The STAC9752A/9753A incorpo-
rates IDT's proprietary Σ∆ technology.
The AC’97 CODEC is designed to achieve a DAC SNR in
excess of 94dB. The DACs, ADCs, and mixer are inte-
grated 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 STAC9752A/9753A includes digital input/output capa-
bility for support of modern PC systems, with an output that
supports the SPDIF format. The STAC9752A/9753A is a
standard 2-channel stereo CODEC. With IDT’s headphone
drive capability, headphones can be driven with without an
external amplifier.
The STAC9752A/9753A 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 STAC9752A/9753A 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
STAC9752A/9753A can be placed on a motherboard,
daughter boards, PCI, AMR, CNR, MDC or ACR cards.
The STAC9752A/9753A provides variable sample rate Dig-
ital-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 STAC9752A/9753A soft
audio drivers. All ADCs and DACs operate at 20-bit resolu-
IDT™
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AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
STAC9752A/9753A
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