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 kΩ, Minimum
− PGA Gain: 11 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 (PCM1850)
− With I2C Control (PCM1851)
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
Lead-Free Product

APPLICATIONS
DVD/HDD/DVD+HDD Recorder
AV Amplifier Receiver
CD Recorder
MD Recorder
Multi-Track Recorder
Electric Musical Instrument

DESCRIPTION
The PCM1850/1851 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 PCM1850/1851 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 PCM1850/1851 supports two modes (master and slave) and
four data formats through a serial control interface, SPI for the PCM1850 and I2C for the PCM1851, respectively. The
PCM1850/1851 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 PCM1850/1851 is fabricated
using a highly advanced CMOS process and is available in a small 32-pin TQFP package.