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.
● Multiplexer and Programmable-Gain Amplifier (PGA)
● 6×2-Channel Single-Ended Inputs
● Multiplexed Output
● Maximum Input Level: 2.4 V rms
● Input Resistance: 50 k, 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: 1696 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
