PCM2903BDBR屬于集成電路（IC）的編解碼器。由美國德州儀器公司制造生產(chǎn)的PCM2903BDBR編解碼器編解碼器是用于通過壓縮和解壓縮來轉(zhuǎn)換數(shù)據(jù)的半導(dǎo)體器件。數(shù)據(jù)壓縮可提高傳輸速度并減少存儲空間。某些編解碼器提供高達(dá) 32 位的分辨率，并且分別提供多達(dá) 6 個或 8 個模數(shù)轉(zhuǎn)換器和數(shù)模轉(zhuǎn)換器。除三角積分調(diào)制外，還有 I2C、I2S、SPI、串行、HDA、S/DIF、PCM、USB、AC'97 和 SLIMbus 數(shù)據(jù)接口。

1FEATURES

234? 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

– 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

? S/PDIF Input/Output

? Single Power Supply:

– 3.3 V Typical

? Stereo ADC:

– Analog Performance at V CCC = VCCP1 = VCCP2

= VCCX = VDD = 3.3 V:

– THD+N = 0.01%

– SNR = 89 dB

– Dynamic Range = 89 dB

– Decimation Digital Filter: full–

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 VCCC = VCCP1 = VCCP2

= VCCX = VDD = 3.3 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 and Mute Controls

– Suspend Flag Function

? 28-Pin SSOP Package

APPLICATIONS

? USB Audio Speaker

? USB Headset

? USB Monitor

? USB Audio Interface Box

DESCRIPTION

The PCM2903B 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

PCM2903B 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.