10 Volt Source

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  • barry wilkins
    Senior Member
    • Aug 2009
    • 172
    #1

    10 Volt Source

    Here is a circuit that uses an LM4040AIM3 10 device ,it is supposed to be accurrate to 0.1%.

    I made it to check my Oscilloscope and DVM,s

    Barry Wilkis
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    • PeteS in CA
      Badcaps Legend
      • Aug 2005
      • 3583
      • USA, Unsure of Planet
      #2
      Re: 10 Volt Source

      That's not really a voltage source. The LM4040 is a series of precision shunt references. Think of it as an ultra-precise low tempco zener diode. You need to choose the series resistor to keep the shunt current within the specified range. Too high and it'll fry. Too low and it will probably oscillate - a sawtooth riding on the approximate specified reference voltage.

      Checking the DC accuracy of your meter and 'scope is is a good use. It's also useful as a reference for a comparator (e.g. in a window detector to check whether a power supply output is in spec.
      Last edited by PeteS in CA; 04-09-2018, 06:42 PM.
      PeteS in CA

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