STAC9460 Datasheet, PDF (4/21 Pages) List of Unclassifed Manufacturers – Two and Six-Channel, 24-Bit, 192 kHz Audio Codec

PRELIMINARY INFORMATION 8/24/01
STAC9460/62
Two and Six-Channel, 24-Bit, 192 kHz Audio Codec
2. PRODUCT BRIEF
SigmaTel’s STAC9460/62 are six and two-channel general-purpose 24-bit, full
duplex, audio codecs for use in consumer applications. The STAC9460/62 incorpo-
rate SigmaTel’s proprietary Sigma-Delta technology to achieve ADC and DAC SNRs
in excess of 100 dB. The DACs, and ADCs are integrated with analog I/Os, which
include two differential analog and two MIC inputs. There are three audio I²S inputs
and an I²S digital output. The STAC9460/62 communicates via a standard two-wire
serial interface providing simplicity in the audio system design. Packaged in a 28-
pin SSOP, the STAC9460 and STAC9462 require minimal PCB space for implemen-
tation.
The STAC9460 provides variable sample rate D-A and A-D conversion, as well as
analog processing. Supported DAC audio sample rates include 32 kHz, 44.1 kHz,
48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz and 192 kHz. Supported ADC audio sample
rates inclued 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz,and 96 kHz. The digital data inter-
face communicates via a standard I²C^® compatible serial control interface and I²S
digital audio interface. The stereo sample rate ADC’s provide record capability from
the microphone inputs or the differential inputs. All DAC’s operate at 24-bit resolu-
tion with the sample rate based on the MCLK and programmable registers. The
ADCs operate at 24-bit resolution and supply full 24-bit filter data.
The STAC9460 supports three I²S digital audio inputs and an I²S digital audio out-
put. These digital I/O options provide for a number of advanced architectural imple-
mentations, with volume controls and mute capabilities built directly into the codec
for each individual channel. The output volume ranges from 0 dB to -95 dB with
.75 dB steps. For MIC input, the input volume ranges from 0 dB to 22.5 dB with
1.5 dB steps. The STAC9460 also supports a single-line format.
The STAC9460 is designed primarily to support 6-channel audio. True AC-3 play-
back can be achieved for 6-speaker applications by taking advantage of the
STAC9460 architecture and combining it with the appropriate processing. This
product is ideal for home theatre, DVD, karaoke, and set-top-box applications.
2.1.
FEATURES
• High performance Σ∆ technology
• Two or six channels with independent volume controls
• 24-bit full duplex stereo DACs
• 24-bit full duplex stereo ADC
• 32, 44.1, 48, 88.2, 96, 176.4 and 192 kHz DAC sample rates
• 32, 44.1, 48, 88.2 and 96 kHz ADC sample rates
• Standard I²C^ compatible and I²S serial interfaces
• Digital de-emphasis capability
• DAC and ADC SNR >100 dB
• Differential Stereo Analog Input
• Dual mic inputs with independent volume controls
• 28-pin SSOP package
• Energy saving dynamic power modes
• 5V Analog with 3.3V or 5V Digital capability
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2-9460-D1-1-0-0801