The AD7682/AD7689 are 4-channel/8-channel， 16-bit， charge redistribution successive approximation register （SAR） analogto-digital converters （ADCs） that operate from a single power supply， VDD. The AD7682/AD7689 contain all components for use in a multichannel， 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 that is useful for configuring the inputs as single-ended （with or without ground sense）， differential， or bipolar; an internal low drift reference （selectable 2.5 V or 4.096 V） and buffer; a temperature sensor; a selectable one-pole filter; and a sequencer that is useful when channels are continuously scanned in order. The AD7682/AD7689 use a simple SPI interface for writing to the configuration register and receiving conversion results. The SPI interface uses a separate supply， VIO， which is set to the host logic level. Power dissipation scales with throughput. The AD7682/AD7689 are housed in a tiny 20-lead LFCSP and 20-lead WLCSP with operation specified from ?40°C to +85°C.