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Smart Power, Voltage and Current Monitoring Solutions


System designers know that they need to measure power before they can manage it. Our power monitor ICs measure power, voltage, current and energy accumulation. For power monitoring from 0 to 40V, our high-side current sensors include an I2C interface for embedded computing, networking, industrial and artificial intelligence applications. To get ahead of the thermal curve, we also offer several devices that integrate both current sensor ICs and temperature sensors.

Key Benefits of Our Power Monitoring Solutions


  • Calculate power, reducing host code overhead
  • Require no filter circuits, saving circuitry costs
  • Acumulation registers track power over time
  • Peak detection with duration setting to provide a unique energy alert

Featured Power Monitor ICs


PAC1921

PAC1921

  • Digital and analog output for prototyping
  • 1% power measurement accuracy
  • Integrated average power measurement
PAC1954

PAC1954

  • Quad power/current sensor (0 to 32V)
  • System power saved vs use of multiple singles
  • 1 mA to 10A without configuration changes
PAC1944

PAC1944

  • Quad power/current sensor (0 to 9V)
  • Optimal for dual and single lithium-ion battery
  • 1 mA to 10A without configuration changes

Featured AC Power Monitoring ICs


MCP39F511A

MCP39F511A

  • Dual-mode AC & DC power monitoring IC
  • Auto-sensing and switching between power modes
  • 0.1% accuracy over a 4000:1 dynamic range
MCP39F511N

MCP39F511N

  • Dual-channel, single-phase power monitoring IC
  • 0.5% accuracy over a 4000:1 dynamic range
  • Six programmable event notifications
MCP39F521

MCP39F521

  • Single-phase power monitoring IC
  • 0.1% accuracy over a 4000:1 dynamic range
  • Up to four devices on the same bus

Current/Voltage/Power Monitor ICs


Reference Designs


Single-Phase, Anti-Tamper Energy Meter Reference Design

MCP3911- and PIC18F85K90-based single-phase anti-tamper energy meter reference design

Smart Plug Reference Design

MCP39F511-based smart plug reference kit and user's guide 

Current/Voltage/Power Monitor ICs