Isolated Energy Measurement Processor for Load Monitoring Units

Industry's Smallest Form Factor Solution Available for Embedded AC Measurement


The MAX78615+LMU is an isolated energy measurement processor (EMP) for load monitoring and control of any 2-wire single-phase or 3-wire split-phase (120/180°) AC circuit. It provides flexible sensor configuration of up to two MAX78700 (four analog inputs) and numerous host interface options for easy integration into any system architecture.

The internal 24-bit processor and field upgradeable firmware performs all the necessary signal processing, compensation, and data formatting for accurate real-time measurement. Energy accumulation, alarm monitoring, and fault detection schemes minimize the overhead requirements of the host interface and/or network. The integrated flash memory also provides for nonvolatile storage of input configurations and calibration coefficients.
MAX78615+LMU MAX78615+LMU Enlarge+

Key Features

  • Best-in-Class Embedded Algorithms SupportHighly Accurate Electricity Measurements
    • Voltage, Current and Frequency
    • Active, Reactive, and Apparent Power/Energy
    • Power Quality Measurements IncludingPeak Current and Harmonic Content
    • Digital Temperature Compensation
  • Configurable Device Provides Design Flexibility
    • Nonvolatile Storage of Calibration andConfiguration Parameters
    • SPI, I2C, and UART Interface Options
    • Configurable I/O Pins for Alarm Signaling, Address Pins, or User Control
  • Highly Integrated Features Support CompactDesigns and Reduced Bill of Materials
    • Small 24-TQFN Package
    • Internal or External Oscillator TimingReferences
    • Remote ADC Interfaces Provide Cost-Effective and Reliable Isolation
    • Quick Calibration Routines MinimizeManufacturing (System) Cost
    • Digital Temperature Compensation


  • Building Automation Systems (Commercial, Industrial)
  • Grid-Friendly Appliances and Smart Plugs
  • Inverters and Renewable Energy Systems
  • Level 1 and 2 EV Charging Systems
Part Number SoC Type VSUPPLY
Total Sensor Inputs Internal Flash
Internal RAM
Slave Host Interface(s) Package/Pins
Energy Measurement
3.3 4 8 1.5
See Data Sheet
See All Energy Measurement SoCs (11)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


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