I've selected the ADA4700-1 in an application to drive a static charge upon a stainless steel plate (conductivity measuring instrument). For this purpose I have two supply rails, one at +38V and the other at -38V. The ADA4700-1 will be configured as an inverting gain stage. There is virtually no current load on the output.
I'd like to drive the ADA4700-1 from a microprocessor's DAC output (0 to 3.3v) such that the ADA4700-1 presents +38V when the DAC drive is 0 (or +3.3) and -38V when the DAC drive goes the other way.
To make this work, I think we need to swing the DAC drive above and below 0V. Is there any way to avoid this conversion through biasing the ADA4700-1?
Suggestions on the best way to achieve our desired result most gratefully appreciated.