Description
The CS5451 is a highly integrated Delta-Sigma (∆Σ)An alog-to-Digital Converter (ADC) developed for the Power
Measurement Industry. The CS5451 combines six ∆Σ ADCs, decimation filters, and a serial interface on a single chip. The CS5451 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
  –20 mW Typical at VD+ = +3 V

Simple Four-wire Serial Interface

Charge Pump Driver output generates negative power supply.

Ground-Referenced Bipolar Inputs