Howard, I think that configuration would work, but I would still like to see the final schematic. Would this be for some ratiometric measurement? I would note that I did have some comments from my email earlier about the generation of the ±2.5V supplies by using op-amps. With op-amps, capacitive load may be difficult and that limits the bypass caps. I would use a different mode of generating the supply. I haven't tried this, but the LM27762 is used in a couple of EVMs to generate a ±2.5V supply from a single 5V supply. It is used in the ADS1261EVM for this purpose. Joseph Wu
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