How to get a 4.5V reference voltage from ADR02?

hi;

I saw in the datasheet of ADR02 that if we add a 10K pot at the trim pin, we can get 4.95V to 5.02V, but how can I extend the range down to 4.5V?

THX!

Donald

  • Donald,

      The trim pin on most references goes directly into the heart of the bandgap cell.  You could move it more

    by changing the resistors shown, but the tempco of the reference will get a lot worse.  Why do you need

    4.5V??  You can get 4.096V references and 5V references.  If you really need a precise 4.5V, then you

    should use a two resistor divider on the 5V output and buffer the divider network with an op amp.

    Harry


  • 0
    •  Analog Employees 
    on Aug 2, 2018 2:59 PM
    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

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