The AD7682/AD7689 are 4/8-channel, 16-bit, charge-redistribution successive-approximation register (SAR) analog-to-digital converters (ADCs), powered by a single VDD supply. The AD7682/AD7689 feature all the components required for a multi-channel, low-power data acquisition system, including: a true 16-bit SAR ADC with no missing codes; a 4-channel (AD7682) or 8-channel (AD7689) low-crosstalk multiplexer for configuring the inputs as single-ended inputs (with or without reference ground), differential inputs, or bipolar inputs; an internal low-drift reference source (selectable as 2.5V or 4.096V) and buffer; a temperature sensor; a selectable single-pole filter; and a sequencer that is very useful when multi-channels are sampled sequentially. The AD7682/AD7689 use a simple SPI interface to implement writing to the configuration registers and receiving the conversion results. The SPI interface uses a separate power supply (VIO), which is set to the host logic level. Power consumption is proportional to the throughput rate. The AD7682/AD7689 are available in a small 20-pin LFCSP package, with an operating temperature range of -40°C to +85°C.