  Input Impedance of AnalogX and Voltage Divider
Author Message Input Impedance of AnalogX and Voltage Divider
The specification page of AnalogX displays the input impedance of the device to be 10 Megaohms (Link page: https://wiki.autosportlabs.com/AnalogX. Whereas AnalogX takes an input of 5 V.

Let's say I am designing a voltage divider with two resistors of 40 kiloohms and 20 kiloohms.
Now for the loading condition of 10 Mohm, I am still getting the output voltage 16.644. I am using this loading calculator http://www.voltagedividercalculator.com/voltage-divider-calculator-for-dc-load/ putting 10 M ohm as the loaded resistors. I do know that raising the resistance values can impact in better output, but this will also reduce current to zero.

In the present scenario, I am getting 0.0000016 A, for higher value resistors I am hoping it to further scale down? So what will be the optimal solution for my case? Hi,

Because of the buffered inputs and that the input impedance is so high, you can effectively ignore any loading on the circuit. You should be able to use a simple voltage divider calculator.

Hope this helps!

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Brent Picasso
Founder, Autosport Labs 