Hi, Im working with a Motorola HC11 Micro-controller. Im wondering whats the best method to protect my A/D input pins from illegal voltage levels (negative voltage and >7V). The voltage to the pin will be coming from an op-amp which would be capable of going +-12V if something was to fault in the transducer etc.
The reference manual says that using external clamping diodes can lead to leakage that will degrade the accuracy of my readings. Maybe there is a way of applying clamping diodes that will reduce the leakage or there is some other method out there?
Thanks in advance for the info.
The reference manual says that using external clamping diodes can lead to leakage that will degrade the accuracy of my readings. Maybe there is a way of applying clamping diodes that will reduce the leakage or there is some other method out there?
Thanks in advance for the info.