Hi there,
For my bachelor thesis I use the multiplexer NX3L4051. Now I have the problem that I have not taken into account the internal protective circuit. Thus my circuit does not work as intended.
Briefly to the function: I would like to implement a ratiometric resistance measurement. For this I have several reference resistors at the inputs of the NX3L4051 (Y0, Y1,...). These I have connected to a 5V reference voltage, by the internal protection circuit is now a current in my measurement imprinted that I do not want. Could you give me a sketch of the internal circuit, so I can think of a circuit how I can still save my PCB.
And I connect the unknown resistor to GND at the output of the NX3L4051 (output Z) and measure the voltage with an ADC.
Do you have a multiplexer that has the same pin layout but can handle up to 5V at the inputs ?
Thanks a lot
