The ADE7761B is a high accuracy, fault-tolerant, electrical energy measurement IC intended for use with 2-wire distribution systems. The part specifications surpass the accuracy requirements as quoted in the IEC 62053-21 standard. The only analog circuitry used on the ADE7761B is in the ADCs and reference circuit.
FEATURES
High accuracy, active energy measurement IC supports IEC 62053-21
Less than 0.1% error over a dynamic range of 1000 to 1
Supplies active power on the frequency outputs, F1 and F2
High frequency output CF is intended for calibration and supplies instantaneous active power
Continuous monitoring of the phase and neutral current allows fault detection in 2-wire distribution systems
Current channel input level best suited for shunt and current transformer sensors
Uses the larger of the two currents (phase or neutral) to bill, even during a fault condition
Continuous monitoring of the voltage and current inputs allows missing neutral detection
Uses one current input (phase or neutral) to bill when missing neutral is detected
Two logic outputs (FAULT and REVP) can be used to indicate a potential miswiring, fault, or missing neutral condition
Direct drive for electromechanical counters and 2-phase stepper motors (F1 and F2)
Proprietary ADCs and DSP provide high accuracy over large variations in environmental conditions and time
Reference 2.5 V ± 8% (drift 30 ppm/°C typical) with external overdrive capability
