1FEATURES
23· On-Chip USB Interface:
– With Full-Speed Transceivers
– Fully Compliant with USB 2.0 Specification
– Certified By USB-IF
– Partially Programmable Descriptors
– Adaptive Isochronous Transfer for
Playback
– Asynchronous Isochronous Transfer for
Record
– Bus Powered
· 16-Bit Delta-Sigma ADC and DAC
· Sampling Rate:
– 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz
· On-Chip Clock Generator:
– With Single 6-MHz Clock Source
· Mono ADC with Microphone Input
– Analog Performance at V BUS = 5 V:
– THD+N: 0.01%
– SNR: 92 dB
– Dynamic Range: 90 dB
– Decimation Digital Filter
– Pass-Band Ripple: ±0.05 dB
– Stop-Band Attenuation: –65 dB
– Single-Ended Voltage Input
– Antialiasing Filter Included
– Digital HPF Included
– Microphone Bias, Microphone Amplifier,
and Input PGA
· Stereo DAC With Headphone Output
– Analog Performance at VBUS = 5.0 V:
– THD+N: 0.01% (RL > 10 kΩ)
– THD+N: 0.02% (RL = 32 Ω)
– SNR: 92 dB
– Dynamic Range: 90 dB
– PO: 13 mW (RL = 32 Ω)
– PO: 25 mW (RL = 16 Ω)
– Oversampling Digital Filter
– Pass-Band Ripple: ±0.1 dB
– Stop-Band Attenuation: –43 dB
– Single-Ended Voltage Output
– Analog LPF Included
– Sidetone PGA, Output PGA, and HP
Amplifier
· Multifunctions:
– Suspend, Playback, and Record Status Flag
– Microphone Amplifier, Mute, and Gain
Control
· Pop/Click Noise Free
· Single Power Supply: 5 V Typ (VBUS)
· Package: 32-Pin TQFP

APPLICATIONS
· USB Headset
· USB Headphone
· USB Speaker
· USB Featured Consumer Audio Product
· USB Audio Interface Box
· USB Monitor
· Video Conference System

DESCRIPTION
The PCM2912 is the Texas Instruments single-chip,
USB stereo audio CODEC with USB 2.0-compliant
full-speed protocol controller and analog front end (AFE) function for headset application. The USB
protocol controller works with no software code, but
USB descriptors can be modified on request(1). The
PCM2912 employs SpAct™ architecture, TI’s unique
system that recovers the audio clock from USB
packet data. On chip analog PLLs with SpAct enables
independent playback and record sampling rate with
low clock jitters.