MAX78615+LMU - Isolated Energy Measurement Processor for Load Monitoring Units

Maxim offers the industry's smallest form-factor solution available for embedded AC measurement

Image of Maxim Integrated's MAX78615+LMU - Isolated Energy Measurement Processor for Load Monitoring UnitsThe 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 perform 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.

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  • Building automation systems (commercial, industrial)
  • Inverters and renewable energy systems
  • Level 1 and 2 EV charging systems
  • Grid-friendly appliances and smart plugs

  • 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


ImageManufacturer Part NumberDescriptionAvailable Quantity
MAX78615+LMU/A01 datasheet linkIC ENERGY MEAS PROC LMU TQFNMAX78615+LMU/A01IC ENERGY MEAS PROC LMU TQFN0MAX78615+LMU/A01 product page link

Eval Board

ImageManufacturer Part NumberDescriptionMain PurposeUtilized IC / PartAvailable Quantity
MAXREFDES14# datasheet linkREFERENCE DESIGN SONOMAMAXREFDES14#REFERENCE DESIGN SONOMAPower Management, Energy/Power MeterMAX78615+LMU, MAX787007 - Immediate
MAXREFDES14# product page link
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Published: 2014-06-18