ADE7757 Energy Metering IC with Integrated Oscillator SMD Package

The ADE7757 is a single-phase energy metering IC developed by Analog Devices, designed for accurate measurement of active (real) power in electrical energy metering applications.

It integrates two high-resolution ADCs, a digital multiplier, digital filters, and an internal oscillator, simplifying the design of energy meters and significantly reducing external component requirements.

The IC directly converts measured energy into a frequency or pulse output (CF pin) that is proportional to the average real power consumed. This makes it ideal for electronic watt meters, smart plugs, and low-cost energy measurement systems.

With its compact SMD (SOIC-16 or SSOP-16) package and low power consumption, the ADE7757 offers an efficient and accurate metering solution for modern compact designs.

• On-Chip Oscillator as Clock Source
• High Accuracy, Supposes 50 Hz/60 Hz IEC 521/IEC 61036
• Less than 0.1% Error over a Dynamic Range of 500 to 1
• The ADE7757 Supplies Average Real Power on the Frequency Outputs F1 and F2
• The High Frequency Output CF Is Intended for Calibration and Supplies Instantaneous Real Power
• The Logic Output REVP Can Be Used to Indicate a Potential Miswiring or Negative Power
• 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
• On-Chip Power Supply Monitoring
• On-Chip Creep Protection (No Load Threshold)
• On-Chip Reference 2.5 V (20 ppm/
  C Typical) with External Overdrive Capability
• Single 5 V Supply, Low Power (20 mW Typical)
• Low Cost CMOS Process
• AC Input Only

Operating Principle:

• Signal Acquisition: ADCs sample voltage and current waveforms.
• Digital Processing: Internal DSP multiplies and averages instantaneous power.
• Frequency Conversion: Average power is converted into a pulse frequency signal.
• Output Scaling: Each CF pulse corresponds to a specific amount of energy.

The CF pin can be directly connected to a microcontroller input or LED for visual calibration and metering indication.

Applications:

• Single-phase electronic energy meters
• Smart power monitors and plug-in watt meters
• Home energy monitoring systems
• Industrial power analyzers
• Appliance energy usage tracking
• IoT energy monitoring modules
• Solar inverter power measurement