ADS8691
Overview
The ADS8691, ADS8695, and ADS8699 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 temperature drift.
- 18-bit ADC with integrated analog front-end
- High speed: - ADS8691: 1 MSPS - ADS8695: 500 kSPS - ADS8699: 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: ±0.6 LSB; INL: ±1.75 LSB - SNR: 92.5 dB; THD: -110 dB
- ALARM → high, low threshold
- multiSPI™ interface with daisy-chain
