Hi, I'm wonyoung.
I want to use AD8422 with voltage dividing with high impedance register(1Mohm).
Here's circuit i want to use.
I tested this circuit for performance test, It doesn't work when R23 and R27 set above 300K-ohm. Under 200K-ohm, it works normally. Here's the result of test
I want to set R23 and R27 as 1M-ohm for sensor measurement.
Here's my Questions.
1) Why this result came out?
2) Is any way to use 1M ohm serial register with AD8422? Like above circuit?
3) If I can't use AD8422 with 1Mohm serial register, Can you recommand other Instrumentation Amplifier, which can use with 1Mohm serial register?