GENERAL DESCRIPTION
The AD7713 is a complete analog front end for low frequency measurement applications. The device accepts low level signals directly from a transducer or high level signals (4
VREF) and outputs a serial digital word. It employs - conversion technique to realize up to 24 bits of no missing codes performance. The input signal is applied to a proprietary programmable gain front end based around an analog modulator. The modulator output is processed by an on-chip digital filter. The first notch of this digital filter can be programmed via the on-chip control register, allowing adjustment of the filter cutoff and settling time.

FEATURES
    Charge Balancing ADC
        24 Bits No Missing Codes
        ±0.0015% Nonlinearity
    3-Channel Programmable Gain Front End
        Gains from 1 to 128
        2 Differential Inputs
        1 Single-Ended High Voltage Input
    Low-Pass Filter with Programmable Filter Cutoffs
    Ability to Read/Write Calibration Coefficients
    Bidirectional Microcontroller Serial Interface
    Single-Supply Operation
    Low Power (3.5 mW typ) with Power-Down Mode (150 μW typ)

APPLICATIONS
    Loop Powered (Smart) Transmitters
    RTD Transducers
    Process Control
    Portable Industrial Instruments