I am using the LTC6090 op-amp (links to datasheet) to generate a high voltage, low current voltage.
However I've never really done anything regarding DC voltages this high before, so I was wondering which of these power supply solutions were better to provide the ±70 .
My plan was to buy a 140V DC power supply and use a voltage divider with high voltage resistors of 500k and tying the middle to ground.
The second option was to buy two 70V supplies and tying them together. Wiring the middle to ground.
My reason for chossing the first one was because I can't be certain the power supplies are even designed to be tied together like that. But I have never done this before so I thought I would ask this question to learn why doing it one way is better than the other, because in all honestly I'm not too sure.
I've done this before for batteries and low voltage supplies, does anything change when you go to ±70 or greater? Or is it you just need to make sure the voltage ratings of all your components are suitable and that's all you need to worry about?