Hi Sir, I got the old LMP91200 datasheet, and it shows the pin 2, 3 is the CAL and RTD. The pin description defines these 2 pin to measure the Temp. and do the calibration. But we check the datasheet again recently, and we found it has been revised. the Pin 2 and 3 are NC. Is anything different ? or should we do the calibration ? others, I got the PH sensor (1 Input , 2 GND), Could I let the Vcm pin to GND ? thanks Mac.
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