I am using an 8-channel ADC for data acquisition. The voltage supply of ADC is +3.3V. The first input channel of ADC is connected to the output of an opamp (3V3_CURRENT). However, the opamp is provided with a +6V supply which means the first channel of ADC can have a voltage level maximum up to +6V. So, I need to limit the voltage on this first channel to +3.3V. How should I achieve this using a diode?