DESCRIPTION
●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.
●FEATURES
●• 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 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
