AD7989
An 18-bit, successive approximation analog-to-digital converter (ADC) that operates from a single supply VDD. It contains a low-power, high-speed, 18-bit sampling ADC and a versatile serial interface port. On the rising edge of the CNV, the AD7989-1/AD7989-5 sample the voltage difference between the IN+ and IN- pins, which typically swing from 0 V to VREF, phase opposite. The reference voltage (REF) is provided externally and can be independent of the supply voltage (VDD). Power consumption and throughput rate vary linearly.
The SPI-compatible serial interface also enables several ADCs to be daisy-chained onto a single-3-wire bus using the SDI input. With a separate supply VIO, it is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic.
The AD7989-1/AD7989-5 are available in a 10-lead MSOP or 10-lead LFCSP package and are specified over the −40°C to +85°C temperature range.
apply
- Battery-powered devices
- Data acquisition system
- Medical instruments
- Seismic data acquisition system