AD7689

Data Sheet AD7682/AD7689 16-Bit, 4-Channel/8-Channel, 250 kSPS PulSAR ADCs FEATURES ► 16-bit resolution with no missing codes ► 4-channel (AD7682)/8-channel (AD7689) multiplexer with choice of inputs ► Unipolar single-ended ► Differential (GND sense) ► Pseudobipolar ► Throughput: 250 kSPS ► INL: ±0.4 LSB typical, ±1.5 LSB maximum (±23 ppm or FSR) ► Dynamic range: 93.8 dB ► SINAD: 92.5 dB at 20 kHz ► THD: −100 dB at 20 kHz ► Analog input range: 0 V to VREF with VREF up to VDD ► Multiple reference types ► Internal selectable 2.5 V or 4.096 V ► External buffered (up to 4.096 V) ► External (up to VDD) ► Internal temperature sensor (TEMP) ► Channel sequencer, selectable 1-pole filter, busy indicator ► No pipeline delay, SAR architecture ► Single-supply 2.3 V to 5.5 V operation with 1.8 V to 5.5 V logic interface ► Serial interface compatible with SPI, MICROWIRE, QSPI, and DSP ► Power dissipation ► 3.5 mW at 2.5 V/200 kSPS ► 12.5 mW at 5 V/250 kSPS ► Standby current: 50 nA ► Low cost grade available ► 20-lead 4 mm × 4 mm LFCSP package ► 20-lead 2.4 mm × 2.4 mm WLCSP package APPLICATIONS ► Multichannel system monitoring ► Battery-powered equipment ► Medical instruments: ECG/EKG ► Mobile communications: GPS ► Power line monitoring ► Data acquisition ► Seismic data acquisition systems ► Instrumentation ► Process control FUNCTIONAL BLOCK DIAGRAM Figure 1. GENERAL DESCRIPTION The AD7682/AD7689 are 4-channel/8-channel, 16-bit, charge redistribution successive approximation register ...