I am designing an analytical system for a project. I am using a LOG100JP log differential amplifier. It will output a -10V to +10V signal.
I need to digitize this, one option would be to use a bipolar A/D but that's very expensive.
What I would prefer to do is to use two A/D converters which operate at a 0 to 10V range. One sampling -10V to 0 and the other sampling +10V to 0, this would give me a very accurate measurement since using 2 A/D's increases resolution as opposed to one.
This seems like it should be a very simple problem but I am having trouble understanding how the output of the two a/d's which are at different potentials would be interfaced to a microcontroller etc.
Any help would be very much appreciated.
I need to digitize this, one option would be to use a bipolar A/D but that's very expensive.
What I would prefer to do is to use two A/D converters which operate at a 0 to 10V range. One sampling -10V to 0 and the other sampling +10V to 0, this would give me a very accurate measurement since using 2 A/D's increases resolution as opposed to one.
This seems like it should be a very simple problem but I am having trouble understanding how the output of the two a/d's which are at different potentials would be interfaced to a microcontroller etc.
Any help would be very much appreciated.