Hi,
Customer's product is EMF Flow meter, they want to replace AD627 by INA828. They are using 24bit delta-sigma ADC to
evaluation the output noise, picture 2/3/4 every point is average of 40 sampls,and the unit is AD value. AD627 and INA828
gain setting all are 100 times.The test condition is in no water flow ,the input signal is connect to EMF electrod.
Compare picture2 and picture3 the INA828 output noise almost double then AD627. Customer had test if they reduce 10Mohm
to 100k the noise could be reduce,but signal amplitude also decay. Compare datasheet between INA828 and AD627, we think
INA828 should better then AD627. Please give me some recommend for schematic.
Thanks.
