ADE7757A:  Single Phase Energy Metering IC with Integrated Oscillator and Reverse Power Indication

The ADE7757A (AD71056) is an accurate electrical energy measurement integrated circuit. It is a pin reduction version of ADE7755 with an enhancement of a precise oscillator circuit that serves as a ...More

The AD71056AR part number replaces the ADE7757AAR models. Please review the AD71056AR datasheet prior to ordering.

ADE7757A:  Single Phase Energy Metering IC with Integrated Oscillator and Reverse Power Indication

Product Description

The ADE7757A (AD71056) is an accurate electrical energy measurement integrated circuit. It is a pin reduction version of ADE7755 with an enhancement of a precise oscillator circuit that serves as a clock source to the chip. The ADE7757A eliminates the cost of an external crystal or resonator, thus reducing the overall cost of a meter built with this IC. The chip directly interfaces with shunt resistor.

The ADE7757A provides instantaneous and average real power based on line current and voltage. The part specifications surpass the accuracy requirements as quoted in the IEC61036 standard. The only analog circuitry used in the ADE7757A is in the ADCs and reference circuit. All other signal processing (e.g., 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 small analog input full-scale allows the chip to interface to low value shunt resistances without losing dynamic range. The ADE7757A is available in 16-lead SOIC narrow-body package.

The Application Note AN-679 can be used as a basis for a description of an IEC62053-21 low cost, watt-hour meter reference design..

NOTE: For polyphase system designs, the ADE7752A is recommended.

Features

  • Exceeds IEC62053-21
  • Less than 0.1% Active Energy Error Over Dynamic Range of 500:1
  • Active Energy Measurement
  • High Frequency Pulse Output
  • Current sensor interface for current transformers or shunts
  • On-chip Temperature Sensor and Voltage Reference (2.45 V)
  • Low Power (20 mW typical)
  • Reverse Power Indication (REVP)

Diagrams

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ADE7757A Diagram
Functional Block Diagram for ADE7757A

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  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
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*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples iinto your cart to check sample availability.

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