Datasheet Linear Technology LT2940IMS#PBF

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  Unique Analog Multiplier Continuously Monitors Instantaneous Power and Simplifies Design of Power Control Loops &mdash LT Journal
  PDF, 1.3 Mb, File published: Jun 30, 2010
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  Unique Analog Multiplier Continuously Monitors
  Instantaneous Power and Simplifies Design of
  Power Control Loops
  Mitchell Lee and Thomas DiGiacomo As energy consumption in electronics is increasingly scrutinized, the ability to accurately
  monitor and control power becomes an important part of any system design. To measure
  instantaneous power, one must simultaneously measure current and voltage and multiply
  the results. While traditional analog multiplier ICs can perform continuous multiplication,
  they typically lack the operating range and input sensitivity required for power monitoring
  and control. The high price of the multiplier itself and the necessary additional signal
  conditioning circuits make such a solution costly both in dollars and in board area.
  Digital solutions, on the other hand,
  can provide sensitivity and dynamic
  range, but lack the ability to continuously monitor power. For instance, the
  LTC4151 combines a 7V to 80V operating
  voltage range, a current sense amplifier,
  a MUX, and an I2C interface with a 12-bit
  ADC to measure current and voltage.
  Multiplication is performed in a host
  processor. This makes for an accurate
  power monitoring solution, but the 7.5Hz
  conversion rate of the ADC limits its utility in closed loop applications, where it
  is unable to respond to rapid changes.
  The LT2940 power monitor solves the …

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Manufacturer's Classification

• Monitor, Control and Protection > Power Monitors

Other Names:

LT2940IMSPBF, LT2940IMS PBF