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.