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LMP91200 pH sensor

Other Parts Discussed in Thread: LMP91200, INA116

Dear team,

My customer is very interesting in the LMP91200.

The pH sensor connect to the LMP91200 and the INA116, and they look some difference in below figures(left: LMP91200; right: INA116 ).

By using the same pH sensor…

  1. Is the INP connection the same as IN+ in the INA116?

  2. Is the VCM connection the same as IN- in the INA116?

  3. What’s the GUARD potential should be connect to(INP or Ground or …)? Is it the same as solution ground in the INA116?

Thanks~~~