GENERAL DESCRIPTION
The AD7731 is a complete analog front-end for process control applications. The device has a proprietary programmable gain front end that allows it to accept a range of input signal ranges, including low level signals, directly from a transducer. The sigmadelta architecture of the part consists of an analog modulator and a low pass programmable digital filter, allowing adjustment of filter cutoff, output rate and settling time.
   
FEATURES
    24-Bit Sigma-Delta ADC
    16 Bits p-p Resolution at 800 Hz Output Rate
    Programmable Output Rates up to 6.4 kHz
    Programmable Gain Front End
    ±0.0015% Nonlinearity
    Buffered Differential Inputs
    Programmable Filter Cutoffs
    FASTStep™* Mode for Channel Sequencing
    Single Supply Operation
   
APPLICATIONS
    Process Control
    PLCs/DCS
    Industrial Instrumentation