Description

The CS5451A is a highly integrated delta-sigma (ΔΣ)an alog-to-digital converter (ADC) developed for the power

measurement industry. The CS5451A combines six ΔΣ 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 to a resistive divider or transformer to measure voltage. The product features a serial interface for communication with a microcontroller 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

- 23 mW Typical at VD+ = +3 V

• Simple Four-wire Serial Interface

• Charge pump driveroutput generates negative power supply.

• Ground-referenced Bipolar Inputs