1FEATURES

234• PCM2900C: Without S/PDIF

• PCM2902C: With S/PDIF

• On-Chip USB Interface:

– With Full-Speed Transceivers

– Fully Compliant with USB 2.0 Specification

– Certified by USB-IF

– Partially Programmable Descriptors

– USB Adaptive Mode for Playback

– USB Asynchronous Mode for Record

– Bus Powered

• 16-Bit Delta-Sigma ADC and DAC

• Sampling Rate:

– DAC: 32 kHz, 44.1 kHz, 48 kHz

– ADC: 8 kHz, 11.025 kHz, 16 kHz, 22.05 kHz,

32 kHz, 44.1 kHz, 48 kHz

• On-Chip Clock Generator with Single 12-MHz

Clock Source

• Single Power Supply:

– 5 V Typical (VBUS)

• Stereo ADC:

– Analog Performance at VBUS = 5 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 VBUS = 5 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

APPLICATIONS

• USB Audio Speaker

• USB Headset

• USB Monitor

• USB Audio Interface Box

DESCRIPTION

The PCM2900C/2902C are Texas Instruments' single-chip, USB, stereo audio codecs with a

USB-compliant full-speed protocol controller and

S/PDIF (PCM2902C only). The USB protocol

controller requires no software code. The

PCM2900C/2902C employ SpAct™ architecture, TI's

unique system that recovers the audio clock from

USB packet data. On-chip analog PLLs with SpAct

architecture enable playback and record with low

clock jitter as well as independent playback and

record sampling rates.