BurrBrown Products

from Texas Instruments

FEATURES

APPLICATIONS

DESCRIPTION

PCM1850A

PCM1851A

SLES173 – MARCH 2006

24-BIT, 96-kHz STEREO A/D CONVERTER

WITH 6

× 2-CHANNEL MUX AND PGAE

•

PCM Audio Interface

•

Multiplexer and Programmable-Gain Amplifier

– Master/Slave Mode Selectable

(PGA)

– Data Formats: 24-Bit Left-Justified, 24-Bit

– 6

×2-Channel Single-Ended Inputs

I2S, 16-, 24-Bit Right-Justified

– Multiplexed Output

•

Mode Control by Serial Interface:

– Maximum Input Level: 2.4 V rms

– With SPI Control (PCM1850A)

– Input Resistance: 50 k

Ω, Minimum

– With I2C Control (PCM1851A)

– PGA Gain: 11-dB to –11-dB Range, 0.5

•

Sampling Rate: 16–96 kHz

dB/Step

•

System Clock: 256 fs, 384 fs, 512 fs, 768 fs

•

24-Bit Delta-Sigma Stereo A/D Converter

•

Dual Power Supplies: 5 V for Analog, 3.3 V for

•

Antialiasing Filter Included

Digital

•

Oversampling Decimation Filter

•

Package: 32-Pin TQFP

– Oversampling Frequency:

×64

– Pass-Band Ripple:

±0.05 dB

•

DVD/HDD/DVD+HDD Recorder

– Stop-Band Attenuation: –65 dB

•

AV Amplifier Receiver

– On-Chip High-Pass Filter: 0.91 Hz (48 kHz)

•

CD Recorder

•

High Performance

•

MD Recorder

– THD+N: 0.0023% (Typically)

•

Multitrack Recorder

– SNR: 101 dB (Typically)

•

Electric Musical Instrument

– Dynamic Range: 102 dB (Typically)

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.