TLC320AD91 Datasheet, PDF (7/43 Pages) Texas Instruments – Stereo Audio Codec

1 Introduction
The TLC320AD91C is designed to be 100% compliant with the audio codec ‘97 (AC‘97) standard
specification. The codec is designed to be controlled by a digital controller. The two fixed 48-kHz sample
rate DACs support a stereo PCM output channel that contains a mix, determined by the codec controller,
of all digital audio sources, including an internal synthesizer, and any other digital sources. The output of
these DACs is mixed with additional analog sources and sent to the independently-controlled LINOP output.
For a speakerphone, the MONOP output delivers either mic only or a mono mix of sources to a telephony
subsystem. The ADC path supports two channels of fixed 48-kHz sample rate inputs. The standard stereo
PCM input channel supports the record of any mono or stereo source, or a mix of sources.
1.1 Features
• Compliant with Audio Codec (AC) ’97 Specification
• Serial (AC-Link) Interface Port
• Full-Duplex Codec with 18-Bit Resolution ADC and DAC
• 48-kHz Sample Rate
• Multiple Stereo Input Mixer: LINE, CD, VID, and AUX
• Line Level Mono Inputs for Speakerphone and BEEP
• Mono Mic Input Switchable From Two Different Sources
• Very Low Interchannel Crosstalk Preserves Stereo Fidelity
• ADC and DAC Total Harmonic Distortion Met for Full-Scale (0.9 V_rms) Levels
• Stereo Line Level Output Plus Mono Output For Speakerphone
• Mono and Stereo Volume Control
• Power Management Support (Power Down Mode)
• Interfaces to 5-V or 3.3-V Digital Controller
• Operates From 3.3-V or 5.5-V Power Supply
• Standard 48-Pin TQFP Package
• Tone Free ADC and DAC in PC Environment
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