I’m using an INA826 in my circuit and am coming across a problem.
My circuit is set up such that signal going to the +input pin comes from a voltage divider, and passes through a diode (see screenshot below for the configuration I’m using).
The INA826 is set up for unity gain, so the gain pins are floating.
When the diode is set up at +input, the output of the INA826 is always at the V+ rail.
The voltage going into the +input pin is not at the V+ rail since it is a result of the voltage divider minus a ~0.3V drop from the diode.
I’ve tried difference voltage divider scenarios so the +input signal ranges from 0 – V+, and I’ve tried different voltages for V+, but the output is always at the V+ rail.
When I take out the diode, the INA826 acts as a voltage follower, which is what I want.
Do you know why the diode is causing the INA826 to output its V+ rail regardless of the +input signal?
