On page 12 of the datasheet (https://www.analog.com/media/en/technical-documentation/data-sheets/6090fe.pdf), it is mentioned that we can use a split supply for the op-amp. Would there be any issue using a split supply with greater voltage on the negative supply? For example, using +40V and -100V for the positive and negative supplies respectively.
That would not be an issue with LTC6090 being run with +40V and -100V supplies, as shown below in LTspice simulation below:
Here is the LTspice simulation file:
LT6090 Skewed Supplied EZ 4_1_20.asc