PCM2906BDB

立体声音频编解码器采用USB接口，单端模拟输入/输出，以及S / PDIF STEREO AUDIO CODEC WITH USB INTERFACE, SINGLE-ENDED ANALOG INPUT/OUTPUT, AND S/PDIF

DESCRIPON

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 Descriptors1

– 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