The PCM2906B is Texas Instruments" 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, but the USB descriptors can be modified in some areas (for example, vendor ID and/or product ID). The PCM2906B 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.
On-Chip USB Interface:
With Full-Speed Transceivers
Fully Compliant with USB 2.0 Specification
Certified by USB-IF
Partially Programmable Descriptors(1)
USB Adaptive Mode for Playback
USB Asynchronous Mode for Record
Bus Powered
16-Bit Delta-Sigma ADC and DAC
Sampling Rate:
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:
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 dBStop-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
(1)The descriptor can be modified by changing a mask.
SpAct is a trademark of Texas Instruments.
System Two, Audio Precision are trademarks of Audio Precision, Inc.