ADE7760 Datasheet | Analog Devices

.. Energy Metering IC with On-Chip Fault Detection ADE7760 Features High accuracy active energy measurement IC, supports IEC 687/61036 Less than 0.1% error over a dynamic range of 500 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 channels input level best suited for current transformer sensors 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) 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 Single 5 V supply, low power GENERAL DESCRIPTION The ADE7760 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 IEC61036 standard. The only analog circuitry used on the ADE7760 is in the ADCs and reference circuit. All other signal processing (such as multiplication and filtering) is carried out in the digital domain. This approach provides superior stability and accuracy over extremes in environmental conditions and over time. The ADE7760 incorporates a fault detection scheme similar to the ADE7751 by continuously monitoring both the phase and neutral currents. A fault is indicated when these currents differ by more than 6.25%. The ADE7760 supplies average active power information on the low frequency outputs F1 and F2. The CF logic output gives instantaneous active power information. The ADE7760 includes a power supply monitoring...