18-Bit, 1.33 MSPS PulSAR 10.5 MW ADC In MSOP/QFN

The AD7984 is an 18-bit, successive approximation, Analog-to-digital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 18-bit sampling ADC and a versatile serial Interface port. On the CNV rising edge, the AD7984 samples the voltage difference between the IN+ and IN pins. The voltages on these pins usually swing in opposite phases between 0 V and VREF. The reference voltage, REF, is applied externally and CAN be set independent of the supply voltage, VDD.
The SPI-compatible serial Interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus and provides an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, and 5 V Logic using the separate VIO supply.
The AD7984 is available in a 10-lead MSOP or a 10-lead QFN (LFCSP) with operation specified from 40C to +85C.
Applications Battery-powered equipment Data acquisition systems Medical instruments Seismic data acquisition systems
Data Sheet, Rev. 0, 11/07
By Analog Devices, Inc.