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PCM1850A

更新时间： 2024-11-13 04:34:59
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BB 转换器复用器
页数 文件大小 规格书
32页 452K
描述
24-BIT, 96-kHz STEREO A/D CONVERTER WITH 6 ⅴ 2-CHANNEL MUX AND PGAE

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PCM1850A 数据手册

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PCM1850A  
PCM1851A  
SLES173–MARCH 2006  
24-BIT, 96-kHz STEREO A/D CONVERTER  
WITH 6 × 2-CHANNEL MUX AND PGAE  
FEATURES  
•
PCM Audio Interface  
•
Multiplexer and Programmable-Gain Amplifier  
(PGA)  
– Master/Slave Mode Selectable  
– Data Formats: 24-Bit Left-Justified, 24-Bit  
I2S, 16-, 24-Bit Right-Justified  
– 6×2-Channel Single-Ended Inputs  
– Multiplexed Output  
•
Mode Control by Serial Interface:  
– With SPI Control (PCM1850A)  
– With I2C Control (PCM1851A)  
Sampling Rate: 16–96 kHz  
– Maximum Input Level: 2.4 V rms  
– Input Resistance: 50 kΩ, Minimum  
– PGA Gain: 11-dB to –11-dB Range, 0.5  
dB/Step  
•
•
•
System Clock: 256 fs, 384 fs, 512 fs, 768 fs  
•
•
•
24-Bit Delta-Sigma Stereo A/D Converter  
Antialiasing Filter Included  
Dual Power Supplies: 5 V for Analog, 3.3 V for  
Digital  
Oversampling Decimation Filter  
– Oversampling Frequency: ×64  
– Pass-Band Ripple: ±0.05 dB  
– Stop-Band Attenuation: –65 dB  
– On-Chip High-Pass Filter: 0.91 Hz (48 kHz)  
High Performance  
•
Package: 32-Pin TQFP  
APPLICATIONS  
•
•
•
•
•
•
DVD/HDD/DVD+HDD Recorder  
AV Amplifier Receiver  
CD Recorder  
MD Recorder  
Multitrack Recorder  
Electric Musical Instrument  
•
– THD+N: 0.0023% (Typically)  
– SNR: 101 dB (Typically)  
– Dynamic Range: 102 dB (Typically)  
DESCRIPTION  
The PCM1850A/1851A is a high-performance, low-cost, single-chip stereo analog-to-digital converter with a  
single-ended analog front end that consists of a 6-stereo-input multiplexer and wide-range PGA. The  
PCM1850A/1851A includes a delta-sigma modulator with 64-times oversampling, a digital decimation filter and a  
low-cut filter that removes the dc component of the input signal. For various applications, the PCM1850A/1851A  
supports two modes (master and slave) and four data formats through a serial control interface, SPI for the  
PCM1850A and I2C for the PCM1851A. The PCM1850A/1851A is suitable for a wide variety of cost-sensitive  
DVD/CD/MD recorder and receiver applications where good performance and operation from a 5-V analog  
supply and 3.3-V digital supply is required. The PCM1850A/1851A is fabricated using a highly advanced CMOS  
process and is available in a small 32-pin TQFP package.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
System Two, Audio Precision are trademarks of Audio Precision, Inc.  
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2006, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
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