ADS8689

Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design ADS8681, ADS8685, ADS8689 SBAS633C – FEBRUARY 2016 – REVISED OCTOBER 2018 ADS868x 16-Bit, High-Speed, Single-Supply, SAR ADC Data Acquisition System With Programmable, Bipolar Input Ranges 1 Features 1 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: ±0.5 LSB – SNR: 92 dB; THD: –107 dB ALARM → High, Low Threshold multiSPI™ Interface With Daisy-Chain Extended Industrial Temperature Range: –40°C to +125°C 2 Applications Channel-Isolated PLC Analog Input Modules Test and Measurement Battery Pack Monitoring 3 Description The ADS8681, ADS8685, and ADS8689 belong to a family of integrated data acquisition system based on a successive approximation (SAR) analog-to-digital converter (ADC). The devices feature a high-speed, high-precision SAR ADC, integrated analog front-end (AFE) input driver circuit, overvoltage protection circuit up to ±20 V, and an on-chip 4.096-V reference with extremely low tempe...