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Energy Metering IC

The ADE7757 is a high-accuracy, electrical energy metering IC with an on-chip oscillator and direct stepper motor drive capability. The chip achieves superior accuracy with less than 0.1% linearity error over a dynamic range of 500 to one, and operates with a single 5-V power supply. The ADE7757 includes proprietary analog and digital circuitry to measure electrical energy usage over wide variations of environmental conditions and long periods of time. The chip directly interfaces with a shunt resistor and operates with an AC input.

The small, full-scale analog input range allows the chip to interface to low-value shunt resistances without sacrificing dynamic range. Low-frequency pulse outputs supply average real power information and can directly interface to a stepper motor counter display. In addition, synchronized high-frequency pulse outputs are available for calibration and test purposes. The pulse outputs can also be used with a microcontroller or an automatic meter reading module.

The ADE7757 is available in a 16-lead narrow body SOIC package. It costs $2.10 in 1000-piece quantites.

Analog Devices
(781) 937-1428
Fax: (781) 937-1021
www.analog.com