Arduino motor shield r3. current sensing pins resolution

Other Hardware Motors, Mechanics, Power and CNC
1

Hi,

I would like to use the current sensing pins on the Arduino motor shield r3. https://www.arduino.cc/en/Main/ArduinoMotorShieldR3

The problem is that my DC motor draws very little current (0-100mA) which means that i cannot use the full range of the ADC. As it is now the resolution of the ADC is 1.65V/A. I would like to change the resolution so that 100mA represent 5 volts. How can i do this? i've considered to change the reference value on the analog inputs but the problem is that i use more than 1 analog input so it will mess things up.

Anybody know what the best solution is?

thanks in advance.