1. Products
  2. A/D Converters (ADC)
  3. Integrated/Special Purpose A/D Converters
  4. Energy Metering ICs
  5. ADE7757A


Overview

Features and Benefits

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

Product Details

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.

Product Lifecycle icon-recommended 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)

Design Resources

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Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
AD71056AR Material Declaration Reliability Data 16-Lead SOIC
AD71056ARZ Material Declaration Reliability Data 16-Lead SOIC
AD71056ARZ-RL Material Declaration Reliability Data 16-Lead SOIC
Wafer Fabrication Data

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