AD7682 & AD7689 16-Bit 250kSPS PulSAR ADCs

Analog Devices Inc. AD7682 and AD7689 16-Bit 250kSPS PulSAR Analog-to-Digital Converters (ADCs) are designed for multi-channel, low-power data acquisition applications. These highly integrated devices contain all the components required, including a 16-bit Successive-Approximation-Register (SAR) ADC with no missing codes, a 4-channel (AD7682) or 8-channel (AD7689) low crosstalk multiplexer, an internal low drift reference and buffer, a temperature sensor, a selectable one-pole filter, and a channel sequencer. These components are configured through an SPI-compatible, 14-bit register. Conversion results, also SPI compatible, can be read after or during conversions with the option for reading back the configuration associated with the conversion.