The AD7944 is a 14-bit, 2.5 MSPS successive approximation
analog-to-digital converter (SAR ADC). It contains a low power, high speed, 14-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and a versatile serial interface port. On the rising edge of CNV, the AD7944 samples an analog input, IN+, between 0 V and VREF
with respect to a ground sense, IN-. The AD7944 features a
very high sampling rate turbo mode (TURBO high) and a
reduced power normal mode (TURBO low) for low power
applications where the power is scaled with the throughput. In normal mode (TURBO low), the SPI-compatible serial inter-
face also features the ability, using the SDI input, to daisy-chain
several ADCs on a single 3-wire bus and provide an optional busy
indicator. The serial interface is compatible with 1.8 V, 2.5 V, and 2.7 V supplies using the separate VIO supply.
The AD7944 is available in a 20-lead LFCSP with operation
specified from -40°C to +85°C.
