Isolated Energy Measurement Processor for Load Monitoring Units

Industry's Smallest Form Factor Solution Available for Embedded AC Measurement
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Active: In Production.


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.

Data Sheet

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An evaluation board is available: MAXREFDES14

Key Features

  • Utilizes MAX78700 Isolated Data Converter(s) and Resistive Sensors
  • Flexible SPI, I²C, or UART Interface Options with Configurable I/O Pins for Alarm Signaling, Address Pins, or User Control
  • Nonvolatile Storage of Calibration and Configuration Parameters
  • Small 24‐TQFN Package and Reduced Bill of Materials
  • Internal or External Oscillator Timing References
  • Quick Calibration Routines Minimize Manufacturing (System) Cost


  • Building Automation Systems (Commercial, Industrial)
  • Grid-Friendly Appliances and Smart Plugs
  • Inverters and Renewable Energy Systems
  • Level 1 and 2 EV Charging Systems

Key Specifications:

Energy Measurement SoCs
Part Number SoC Type VSUPPLY
Total Sensor Inputs Internal Flash
Internal RAM
Slave Host Interface(s)
MAX78615+LMU  Energy Measurement 3.3 4 8 1.5
See All Energy Measurement SoCs (9)

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.



More Information

New Product Press Release   2014-02-04 ] [ 2013-10-09 ]

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Information Index

Document Ref.: 19-6571 Rev 0; 2013-01-08
This page last modified: 2013-04-26