Hello.
I am new to analog design and need to monitor a 1-10V signal using the ADC in a microcontroller. So I need to level shift the 1-10V down to 0 - 5V and I have a dual op-amp circuit I intend to breadboard to accomplish this.
I gather that using an op-amp circuit should impedance match better into the ADC input (2.5Kohm max)as well as provide serious isolation (high z) between the line and the MCU. To protect this circuitry further from signal line overvoltage and misuse I assume that a 12V zener on the op-amp input would help.
However, given my very limited design experience, there may well be a better way. So I would appreciate any comments and or suggestions anyone has on my thoughts. Any suggestions on the best op-amp (or op-amp circuitry) to use for this application, etc?
Thanks in advance.
I am new to analog design and need to monitor a 1-10V signal using the ADC in a microcontroller. So I need to level shift the 1-10V down to 0 - 5V and I have a dual op-amp circuit I intend to breadboard to accomplish this.
I gather that using an op-amp circuit should impedance match better into the ADC input (2.5Kohm max)as well as provide serious isolation (high z) between the line and the MCU. To protect this circuitry further from signal line overvoltage and misuse I assume that a 12V zener on the op-amp input would help.
However, given my very limited design experience, there may well be a better way. So I would appreciate any comments and or suggestions anyone has on my thoughts. Any suggestions on the best op-amp (or op-amp circuitry) to use for this application, etc?
Thanks in advance.