The CS5451A is a highly integrated Delta-Sigma () Analog-to-Digital Converter (ADC) developed for the Power Measurement Industry. The CS5451A combines six ADCs, decimation filters, and a serial interface on a single chip. The CS5451A 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.