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Reference Design
ADS8694, ADS8698
SBAS686 – JULY 2015
ADS869x 18-Bit, 500-kSPS, 4- and 8-Channel, Single-Supply, SAR ADCs with Bipolar Input Ranges
Additional Channels in ADS8698
Multiplexer Gain (%FS)
1 Features
•1 18-Bit ADCs with Integrated Analog Front-End • 4-, 8-Channel MUX with Auto and Manual Scan • Channel-Independent Programmable Inputs:
– ±10.24 V, ±5.12 V, ±2.56 V – 10.24 V, 5.12 V • 5-V Analog Supply: 1.65-V to 5-V I/O Supply • Constant Resistive Input Impedance: 1 MΩ • Input Overvoltage Protection: Up to ±20 V • On-Chip, 4.096-V Reference with Low Drift • Excellent Performance: – 500-kSPS Aggregate Throughput – DNL: ±0.5 LSB; INL: ±1.