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# active voltage divider?

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#### 7rots51

##### Advanced Member level 4
Hello

I want to conver a 0-10Vdc signal to 0-2.5 Vdc .I do it by two resistor (1%)as a passive voltage divider,Both the linearity is not good and in some region of full range the value of nonlinearity is high.If I use a .01% resistors the problem may be solved but the cost is too high.

I need to know is there an active solution with opamp for this problem ,(with using 1% resistors and precision opamps ) .

How to reach a precision divider with excellent linearity (max nonlin 2 mV at 10V)?

Regards

I didnt understand where is the nonliner element at the passive voltage divider. (Load may be nonlinear.)

If you use opamp you can find more problem.

First problem is offset of opamp
and second you will use resistor again for opamp.

My idea, use high power resistor for divider and use in the small owen for stabil temprature conditions.

nonlinearity

I syspect the nonlinearity is from the current limits of what is driving the divider.

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