CS5451A

6-Channel Delta-Sigma A/D Converter

Overview

Channels	Instantaneous I & V	Energy Pulse Outputs	SPI Interface	Real (Active) Power	IRMS, VRMS	Apparent Power (S)	Reactive Power (Q)	Fundamental Power	Temp Sensor	Package
6		—		—	—	—	—	—	—	28 SSOP
Note:
All Energy Measurement parts have Data Linearity of 0.1% over a 1000:1 Range.

Description

The CS5451A is a highly integrated, Delta-Sigma analog-to-digital (A/D) converter developed for the power measurement industry. The CS5451A combines six Delta-Sigma A/D converters, 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

• 16-bit, fourth-order modulator
• Synchronous sampling
• Simple 4-wire serial interface
• Charge pump driver output generates negative power supply
• Ground-referenced bipolar inputs
• Power supply configurations
• VA+ = 3 V; VA- = -2 V; VD+ = 3 V
• Supply tolerances ±10%
• On-chip 1.2 V reference (25 ppm/°C typ.)
• Low-power consumption
• Package: 28-pin SSOP; lead-free assembly

Diagram