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ADS8681, ADS8685, ADS8689
SBAS633E – FEBRUARY 2016 – REVISED AUGUST 2022
ADS868x 16-Bit, High-Speed, Single-Supply, SAR ADC Data Acquisition System With Programmable, Bipolar Input Ranges
1 Features
• 16-bit ADC with integrated analog front-end • High speed:
– ADS8681: 1 MSPS – ADS8685: 500 kSPS – ADS8689: 100 kSPS • Software programmable input ranges:
– Bipolar ranges: ±12.288 V, ±10.24 V, ±6.144 V, ±5.12 V, and ±2.56 V
– Unipolar ranges: 0 V–12.288 V, 0 V–10.24 V, 0 V–6.144 V, and 0 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:
– DNL: ±0.4 LSB; INL: ±0.