PRODUCT OVERVIEW

The AD1870 is a stereo, 16-bit oversampling ADC based on sigma-delta (∑-?) technology intended primarily for digital audio bandwidth applications requiring a single 5 V power supply. Each single-ended channel consists of a fourth order one-bit noise shaping modulator and a digital decimation filter. An on-chip voltage reference, stable over temperature and time, defines the full-scale range for both channels. Digital output data from both channels are time multiplexed to a single, flexible serial interface.

FEATURES

Single 5 V Power Supply

Single-Ended Dual-Channel Analog Inputs

92 dB (Typ) Dynamic Range

90 dB (Typ) S/(THD + N)

0.006 dB Decimator Pass-Band Ripple

Fourth Order, 64x Oversampling ∑-? Modulator

Three-Stage, Linear-Phase Decimator

256 x fS or 384 x fS Input Clock

Less than 100 μW (Typ) Power-Down Mode

Input Overrange Indication

On-Chip Voltage Reference

Flexible Serial Output Interface

28-Lead SOIC Package

APPLICATIONS

Consumer Digital Audio Receivers

Digital Audio Recorders, Including Portables

CD-R, DCC, MD, and DAT

Multimedia and Consumer Electronics Equipment

Sampling Music Synthesizers