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• 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.