I am working on a data logger that will measure the voltage from a battery as it supplies power to a motor inside a drill. However the ADC I am using only accepts up to 5V and the battery is supposedly supposed to peak around 40V. The device isnt supposed to impede the motors functionality and the ADC is sampling at 200Hz so a device with a very small time constant if any is ideal. If anyone could point me in the right direction that would be FANTASTIC. Thanks