FEATURES

· Multiplexer and Programmable-Gain Amplifier

(PGA)

– 6´2-Channel Single-Ended Inputs

– Multiplexed Output

– Maximum Input Level: 2.4 V rms

– Input Resistance: 50 kW, Minimum

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

dB/Step

· 24-Bit Delta-Sigma Stereo A/D Converter

· Antialiasing Filter Included

· 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

– THD+N: 0.0023% (Typically)

– SNR: 101 dB (Typically)

– Dynamic Range: 102 dB (Typically)

· PCM Audio Interface

– Master/Slave Mode Selectable

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

I2S, 16-, 24-Bit Right-Justified

· Mode Control by Serial Interface:

– With SPI Control (PCM1850A)

– With I2C Control (PCM1851A)

· Sampling Rate: 16–96 kHz

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

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

Digital

· Package: 32-Pin TQFP

APPLICATIONS

· DVD/HDD/DVD+HDD Recorder

· AV Amplifier Receiver

· CD Recorder

· MD Recorder

· Multitrack Recorder

· Electric Musical Instrument

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.