Mehrfach-Spannungsteiler-Seite auf Deutsch
Mehrfach-Spannungsteiler-Seite auf Deutsch

Calculation of Multiple Voltage Dividers

This page requires Javascript!
Either you have javascript disabled or your browser does not support it.
This page can not work with your current settings.

Multiple Voltage Divider Schematic

This form optimizes a series connection of 4 resistors to generate three reference voltages with minimum errors.

That was exactly the problem I once had - to generate levels for over current, short circuit and a third level as virtual ground for analog processing.

E Series: E12E24E96E96+E24

V4 is the supply (reference) voltage, V1..V3 are the desired output voltages, each referenced to ground. The voltages have to be specified in ascending order as possible according to the circuit on the right.

I have seen that some ratios can be realized more precisely in E24 than in E96. That's why there is the option E96+E24, which contains all values from E96 and E24. 0.1% resistors, which are no longer really expensive these days, can usually be found in both series.

V1
V2
V3
V4

Result:

R1 R2 R3 R4 V1 V2 V3 Err1 Err2 Err3 ErrMax

Explanation: Err1, Err2 and Err3 are the errors of V1..3 in percent if the divider is connected to V4. The lowest of the individual errors is highlighted turquoise. ErrMax is the highest of the individual errors. The line with the lowest ErrMax is highlighted yellow. Normally you would select the line with the lowest maximum error (marked green) and eventually increase the resistors for some powers of 10.

All results without warranty!

Calculated by muteiler.html ©2014 Robert Loos