GENERAL DESCRIPTION
●The AD7751 is a high-accuracy fault-tolerant electrical energy measurement IC that is intended for use with 2-wire distribution systems. The part specifications surpass the accuracy require ments as quoted in the IEC1036 standard.
●FEATURES
●High Accuracy, Supports 50 Hz/60 Hz IEC 687/1036
●Less than 0.1% Error Over a Dynamic Range of 500 to 1
●SuppliesAverage Real Poweron the Frequency Outputs F1 and F2
●High-Frequency Output CF Is Intended for Calibration and SuppliesInstantaneous Real Power
●Continuous Monitoring of the Phase and Neutral Current Allows Fault Detection in Two-Wire Distribution Systems
●AD7751 Uses the Larger of the Two Currents (Phase or Neutral) to Bill—Even During a Fault Condition
●Two Logic Outputs (FAULT and REVP) Can be Used to Indicate a Potential Miswiring 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 Shuntand Burden Resistance
●Proprietary ADCs and DSP Provide High Accuracy Over Large Variations in Environmental Conditions and Time
●On-Chip Power Supply Monitoring
●On-Chip Creep Protection (No Load Threshold)
●On-Chip Reference 2.5 V 8% (30 ppm/C Typical) with External Overdrive Capability
●Single 5 V Supply, Low Power (15 mW Typical)
●Low-Cost CMOS Process
