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LTC2947 Power and Energy Monitor

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LTC2947 Power and Energy Monitor

Linear Technology's LTC2947 power and energy supply monitor designed for a wide range of applications

Linear Technology's LTC2947 is a high-precision power and energy monitor with an internal sense resistor supporting up to ±30 A. Three internal No Latency ΔΣ™ ADCs ensure accurate measurement of voltage and current, while high bandwidth analog multiplication of voltage and current provides accurate power measurement in a wide range of applications. Internal or external clocking options enable precise charge and energy measurements.

An internal 300 µΩ, temperature-compensated sense resistor minimizes efficiency loss and external components, simplifying energy measurement applications while enabling high accuracy current measurement over the full temperature range.

All measured quantities are stored in internal registers accessible via the selectable I2C/SPI interface. The LTC2947 features programmable high and low thresholds for all.

Video: Introducing the LTC2947 Energy Monitor

Video: 30 A Power and Energy Monitor with Integrated Sense Resistor

Features
  • Measures current, voltage, power, charge, and energy
  • ±30 A current range with low 9 mA offset
  • Integrated 300 µΩ sense resistor
  • 0 V to 15 V input range independent of supply voltage
  • Instantaneous multiplication of voltage and current
  • 0.5% voltage accuracy
  • 1% current and charge accuracy
  • 1.2% power and energy accuracy
  • Alerts when thresholds exceeded
  • Stores maximum and minimum values
  • Shutdown mode with IQ < 10 μA
  • I2C/SPI compatible interface
  • Available in 32-lead 4 mm x 6 mm QFN package
Applications
   
  • Servers
  • Telecom infrastructure
  • Industrial
 
  • Electric vehicles
  • Photovoltaics