Hi All,
First question, I'm getting my bearings, but still learning.
I have a sensitive ADC whose inputs are strictly 0-5V. I'm working with a system that has three main oscillating signal types: -5V/5V, 0-10V, and anything below 10V and ground. This one input must accept all three types.
My first idea ignored the first type. A pot controlling feedback on a non-inverting op amp could amplify anything oscillating under 0-10V to the 0-10V range, then divided it in half with a voltage divider.This worked great in simulations and could take both of the second types well. A zener diode to ground just before the input protected against anything over 5V.
The problem is the first type. If I add a 5V offset, the other two types float too high over ground.
Any ideas or feedback welcome, this is one of the first circuits I'm laying out from scratch.
Thanks kindly,
Chris
First question, I'm getting my bearings, but still learning.
I have a sensitive ADC whose inputs are strictly 0-5V. I'm working with a system that has three main oscillating signal types: -5V/5V, 0-10V, and anything below 10V and ground. This one input must accept all three types.
My first idea ignored the first type. A pot controlling feedback on a non-inverting op amp could amplify anything oscillating under 0-10V to the 0-10V range, then divided it in half with a voltage divider.This worked great in simulations and could take both of the second types well. A zener diode to ground just before the input protected against anything over 5V.
The problem is the first type. If I add a 5V offset, the other two types float too high over ground.
Any ideas or feedback welcome, this is one of the first circuits I'm laying out from scratch.
Thanks kindly,
Chris