DC voltage sensor for monitoring battery SOC

Discussion in 'The Projects Forum' started by donaldm444, Aug 18, 2011.

  1. donaldm444

    Thread Starter New Member

    Jul 16, 2010
    23
    0
    Hi,
    I am interested if anyone knows of any DC voltage sensing ICs that would be appropriate to use to measure DC voltages between 0-15 V. I will be feeding the output of the IC or sensor into the A/D of an Atmel AVR32 UC3 microprocessor.

    I am considering using a voltage divider, but wanted to see if there are alternative methods to minimize the amount of current being drawn by the sensor.


    Thanks
     
  2. #12

    Expert

    Nov 30, 2010
    16,355
    6,852
    There are op-amps that draw picoamps to sense the voltage, but when you add an active sensor, it uses more current than its sensing input, so where will the power for the chip come from?

    How much current does the microprocessor need (that you want to improve on)to sense the voltage?
     
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