ADS8661IPWR

ADS866x SAR ADC Data Acquisition System

Texas Instruments ADS866x SAR ADC Data Acquisition System is based on a successive approximation (SAR) analog-to-digital converter (ADC). The devices feature a high-speed, high-precision SAR ADC and integrated analog front-end (AFE) input driver circuit. It also includes an overvoltage protection circuit up to ±20V and an on-chip 4.096V reference with extremely low-temperature drift. The ADS866x operates on a single 5V analog supply but supports true bipolar input ranges of ±12.288V, ±6.144V, ±10.24V, ±5.12V, and ±2.56V, as well as unipolar input ranges of 0V to 12.288V, 0V to 10.24V, 0V to 6.144V, and 0V to 5.12V. The gain and offset errors are accurately trimmed within the specified values for each input range to ensure high dc precision. The input range selection is done by software programming of the device internal registers. The devices offer a high resistive input impedance (≥ 1MΩ) irrespective of the selected input range.