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1 Features

1? On-Chip USB Interface:

– With Full-Speed Transceivers

– Fully Compliant With USB 2.0 Specification

– Certified by USB-IF

– 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

? S/PDIF Input/Output

? 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:

– Passband Ripple = ±0.05 dB

– Stop-Band Attenuation = –65 dB

– Single-Ended Voltage Input

– Antialiasing Filter Included

– Digital HPF 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:

– Passband Ripple = ±0.1 dB

– Stop-Band Attenuation = –43 dB

– Single-Ended Voltage Output

– Analog LPF Included

? Multifunctions:

– Human Interface Device (HID) Function:

– Volume and Mute Controls

– Suspend Flag Function

? 28-Pin SSOP Package

2 Applications

? USB Audio Speaker

? USB Headset

? USB Monitor

? USB Audio Interface Box

3 Description

The PCM2903C is TI's single-chip, USB, stereo audio codec with a USB-compliant full-speed protocol

controller and S/PDIF. The USB protocol controller

requires no software code. The PCM2903C 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, as well as independent

playback and record sampling rates.