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.