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1FEATURES

234· PCM2901: Without S/PDIF

· PCM2903: With S/PDIF

· On-Chip USB Interface

– With Full-Speed Transceivers

– Fully Compliant With USB 1.1 Specification

– Certified by USB-IF

– Partially Programmable Descriptors (1)

– USB Adaptive Mode for Playback

– USB Asynchronous Mode for Record

– Self-Powered

· 16-Bit Delta-Sigma ADC and DAC

· Sampling Rates

– DAC: 32, 44.1, 48 kHz

– ADC: 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz

· On-Chip Clock Generator With Single 12-MHz

Clock Source

· Single Power Supply: 3.3 V Typical

· Stereo ADC

– Analog Performance at VCCC = VCCP1 = VCCP2

= VCCX = VDD = 3.3 V

– THD+N = 0.01%

– SNR = 89 dB

– Dynamic Range = 89 dB

– Decimation Digital Filter

– Pass-Band Ripple = ±0.05 dB

– Stop-Band Attenuation = –65 dB

– Single-Ended Voltage Input

– Antialiasing Filter Included

– Digital LCF Included

· Stereo DAC

– Analog Performance at VCCC = VCCP1 = VCCP2

= VCCX = VDD = 3.3 V

– THD+N = 0.005%

– SNR = 96 dB

– Dynamic Range = 93 dB

– Oversampling Digital Filter

– Pass-Band Ripple = ±0.1 dB

– Stop-Band Attenuation = –43 dB

– Single-Ended Voltage Output

– Analog LPF Included

· Multifunctions

– Human Interface Device (HID) Volume ±

Control and Mute Control

– Suspend Flag

· Package: 28-Pin SSOP

APPLICATIONS

· USB Audio Speaker

· USB Headset

· USB Monitor

· USB Audio Interface Box

DESCRIPTION

The PCM2901/2903 is TI's single-chip USB stereo

audio codec with USB-compliant full-speed protocol

controller and S/PDIF (only PCM2903). The USB

protocol controller works with no software code, but

the USB descriptors can be modified in some areas

(for example, vendor ID/product ID). The

PCM2901/2903 employs SpAct? architecture, TI's

unique system that recovers the audio clock from

USB packet data. On-chip analog PLLs with SpAct

enable playback and record with low clock jitter and

with independent playback and record sampling

rates.