Features and Benefits
- High accuracy; supports IEC 61036/60687, IEC62053-21, and IEC62053-22
- On-chip digital integrator enables direct interface-to-current sensors with di/dt output
- A PGA in the current channel allows direct interface to shunts and current transformers
- Active and apparent energy, sampled waveform, and current and voltage rms
- Less than 0.1% error in active energy measurement over a dynamic range of 1000 to 1 at 25°C
- Positive-only energy accumulation mode available
- On-chip user programmable threshold for line voltage surge and SAG and PSU supervisory
- Digital calibration for power, phase, and input offset
- On-chip temperature sensor (±3°C typical)
- SPI®-compatible serial interface
- Please see data sheet for additional features.
The ADE7763 features proprietary ADCs and fixed function DSP for high accuracy over large variations in environmental conditions and time. The ADE7763 incorporates two second-order, 16-bit Σ-Δ ADCs, a digital integrator (on Ch1), reference circuitry, a temperature sensor, and all the signal processing required to perform active and apparent energy measurements, line-voltage period measurements, and rms calculation on the voltage and current channels. The selectable on-chip digital integrator provides direct interface to di/dt current sensors such as Rogowski coils, eliminating the need for an external analog integrator and resulting in excellent long-term stability and precise phase matching between the current and the voltage channels.
The ADE7763 provides a serial interface to read data and a pulse output frequency (CF) that is proportional to the active power. Various system calibration features such as channel offset correction, phase calibration, and power calibration ensure high accuracy. The part also detects short duration, low or high voltage variations.
The positive-only accumulation mode gives the option to accumulate energy only when positive power is detected. An internal no-load threshold ensures that the part does not exhibit any creep when there is no load. The zero-crossing output (ZX) produces a pulse that is synchronized to the zero-crossing point of the line voltage. This signal is used internally in the line cycle active and apparent energy accumulation modes, which enables faster calibration.
The interrupt status register indicates the nature of the interrupt, and the interrupt enable register controls which event produces an output on the IRQ pin, an open-drain, active low logic output.
The ADE7763 is available in a 20-lead SSOP package.
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
This documentation describes the ADE7763 Evaluation Kit Hardware and Software functionality. The ADE7763 evaluation board, together with the ADE7763 data sheet and this documentation, provides a complete evaluation platform for the ADE7763. The evaluation board has been designed so that the ADE7763 can be evaluated in its end application easily. Using the appropriate transducers on the current channel (e.g., shunt, CT, di/dt sensor, etc.), the evaluation board can be connected to a test bench or high voltage (240 V rms) test circuit. An on-board resistor divider network provides the attenuation for the line voltage. This application note also describes how the current transducers should be connected for the best performance. The evaluation board (watt-hour meter) is configured and calibrated via the parallel port of a PC. The data interface between the evaluation board and the PC is fully isolated. Windows™ based software is provided with the evaluation board, which allows it to be quickly configured as an energy meter. The evaluation board also functions as a stand-alone evaluation system, which can be easily incorporated into an existing system via a 25 way D-Sub connector. The evaluation board requires two external 5V power supplies (one is required for isolation purposes) and the appropriate current transducer.
Documentation & Resources
RF Meets Power Lines: Designing Intelligent Smart Grid Systems that Promote Energy Efficiency3/5/2010
IC Technology and Failure Mechanisms - Understanding Reliability Standards Can Raise Quality of Meters6/1/2004
Reactive Energy Measurement Made Simple12/31/2003
Measuring Harmonic Energy with a Solid State Energy Meter9/30/2003
Energy measurement ICs Simplify Meter Design3/31/2003
Tapping The Potential Of Electronic Energy Metering11/25/2002
Measuring Reactive Power in Energy Meters1/1/2002
Digital Energy Meters by the Millions4/1/2000
How Solid Is Your Solid-State Energy Meter? Not All Ics Are Created Equal.1/1/2000
Trusting Integrated Circuits in Metering Applications1/1/2000
Solid State Solutions For Electricity Metrology5/25/1999
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.