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STAC9752AXNAEYYX Datasheet

  • STAC9752AXNAEYYX

  • AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK

  • 622.74KB

  • 106頁

  • IDT

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DATASHEET
AC鈥?7 2.3 CODECS WITH STEREO
MICROPHONE & UNIVERSAL JACK
FEATURES
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High Performance
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Technology
AC鈥?7 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
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Full Stereo Microphone Pre-Amp
Internal Jack Sensing on Headphone & Line_Out
Internal Microphone Input Sensing
Digital PC Beep Option
Extended AC鈥?7 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
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Reference Designs
STAC9752A/9753A
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
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technology.
The AC鈥?7 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鈥檚 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-
KEY SPECIFICATIONS
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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
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Data Sheet
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AC鈥?7 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
1
STAC9752A/9753A
V 1.5 1206

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