CS5466

DS659F1

3

1. OVERVIEW

The CS5466 is a CMOS monolithic power measurement device with an energy computation engine. The CS5466

combines a programmable gain amplifier, two

∆Σ ADCs, and energy-to-frequency conversion circuitry on a single

chip.

The CS5466 is designed for energy measurement applications and is optimized to interface to a shunt or current

transformer for current measurement, and to a resistive divider or transformer for voltage measurement. The current

channel has a programmable gain amplifier (PGA) which provides four full-scale input options. With a single +5 V

supply on VA+/AGND, both of the CS5466’s input channels accommodate common-mode plus signal levels be-

tween (AGND - 0.25 V) and VA+.

The CS5466 has three pulse output pins: E1, E2, and FOUT. E1 and E2 can be used to directly drive a mechanical

counter or stepper motor, or interface to a microcontroller. The FOUT pin conveys active (real) power at a pulse fre-

quency many times higher than that of the E1 or E2 pulse frequency, allowing for high-speed calibration.