电能计量IC，具有片内故障检测 Energy Metering IC with On-Chip Fault Detection
GENERAL DESCRIPTION
The ADE7751 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
Supplies Average Real Power on the Frequency Outputs F1 and F2
High-Frequency Output CF Is Intended for Calibration and Supplies Instantaneous Real Power
Continuous Monitoring of the Phase and Neutral Current Allows Fault Detection in 2-Wire
Distribution Systems
ADE7751 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 2-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
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