Description
The CS5471 is a highly integrated Delta-Sigma (∆Σ) Analog-to-Digital Converter (ADC) developed for the Power Measurement Industry. The CS5471 combines two ∆Σ ADCs, decimation filters, and a serial interface on a single chip. The CS5471 interfaces directly to a current transformer or shunt to measure current, and resistive divider or transformer to measure voltage. The product features a serial interface for communication with a micro-controller or DSP. The product is initialized and fully functional upon reset, and includes a Voltage Reference.

Features
● Synchronous Sampling
● On-chip 1.2 V Reference (25 ppm/°C typ.)
● Power Supply Configurations:
    – VA+ = +3 V; VA- = -2 V; VD+ = +3 V
    – Supply tolerances ±10%
● Power Consumption
    – 10 mW Typical at VD+ = +3 V
● Simple Four-wire Serial Interface
● Charge Pump Driver output generates negative power supply.
● Ground-Referenced Bipolar Inputs