FEATURES High Accuracy, supports 50/60 Hz IEC 521/1036 Less than 0.3% error over a dynamic range of 500 to 1 The AD7751 supplies average real power on the frequency outputs F1 and F2 The high frequency output CF is intended for calibration and supplies instantaneous real power data Continuous monitoring of the Phase and Neutral current allows fault detection in two-wire distribution systems The AD7751 uses the larger of the two currents (Phase or Neutral) to bill—even during a fault condition Two Logic outputs (FAULT & REVP) can be used to indicate a potential mis-wiring or fault condition Direct drive for electromechanical counters and two phase stepper motors (F1 and F2) A PGA in the current channel allows the use of small values of shunt and burden resistance Proprietary ADCs and DSP provide high accuracy over large variations in environmental conditions and time Automatic timed reset of AD7751 on power up/down On-Chip reference 2.5V±8% (55 ppm/°C typical) with external overdrive capability Single 5V Supply, Low power (15mW typical) Low Cost CMOS Process