CS5467 datasheet(5/46 Pages) CIRRUS

5 / 46 page

CS5467

DS714A1

ADVANCE RELEASE

1. OVERVIEW

The CS5467 is a CMOS monolithic power measurement device with a computation engine and an ener-

gy-to-frequency pulse output. The CS5467 combines four

∆Σ analog-to-digital converters (ADCs), system

calibration, and a computation engine on a single chip.

The CS5467 is designed for power measurement applications and is optimized to interface to a cur-

rent-sense resistor or transformer for current measurement, and to a resistive divider or potential trans-

former for voltage measurement. The current channels provide programmable gains to accommodate

various input levels from a multitude of sensing elements. With a single +5 V supply on VA+/AGND, the

CS5467’s four input channels can accommodate common mode plus signal levels between

(AGND - 0.25 V) and VA+.

The CS5467 also is equipped with a computation engine that calculates instantaneous power, IRMS,

VRMS, apparent power, active (real) power, reactive power, and power factor. Additional features of the

CS5467 include line frequency monitoring, current and voltage sag detection, zero-cross detection, pos-

itive-only accumulation mode, and three programmable pulse output pins. To facilitate communication to

a microprocessor, the CS5467 includes a simple three-wire serial interface which is SPI™ and Microw-

ire™ compatible. The CS5467 provides three outputs for energy registration. Pins E1, E2, and E3 are de-

signed to interface to a microprocessor.

CS5467 Datasheet(PDF) 5 Page - Cirrus Logic