GENERAL DESCRIPTION
The AD7783 is a complete analog front end for low frequency measurement applications. The 24-bit sigma-delta ADC contains one fully differential input channel that can be configured with a gain of 1 or 16 allowing full-scale input signal ranges of ±2.56 V or ±160 mV from a +2.5 V differential reference input. It also contains two 200 mA integrated current sources.

FEATURES
    Single-Channel, 24-Bit
Σ-Δ ADC
    Pin Configurable (No Programmable Registers)
    ISOURCE Select™ Pin Programmable Input Ranges (±2.56 V or ±160 mV)
    Fixed 19.79 Hz Update Rate
    Simultaneous 50 Hz and 60 Hz Rejection
    24-Bit No Missing Codes
    18.5-Bit p-p Resolution (±2.56 V Range)
    16.5-Bit p-p Resolution (±160 mV Range)

INTERFACE
    Master or Slave Mode of Operation
    Slave Mode 3-Wire Serial SPI®, QSPI™, MICROWIRE™, and DSP-Compatible Schmitt Trigger on SCLK

POWER
    Specified for Single 3 V and 5 V Operation
    Normal: 1.3 mA @ 3 V
    Power-Down: 9 μA

ON-CHIP FUNCTIONS
    Rail-to-Rail Input Buffer and PGA

APPLICATIONS
    Sensor Measurement
    Industrial Process Control
    Temperature Measurement
    Pressure Measurement
    Weigh Scales
    Portable Instrumentation