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LMP91000: Turning off variable bias

Part Number: LMP91000

Can the variable bias for the LMP91000 be turned off to give 100% of VREF?  Or do I need to go to the LMP91002?  I need to give a polarographic Dissolved oxygen probe 670 mV, and it's hard to do when the chip will only give up to 24% of the inputted voltage.

Thanks!

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