Hello,
I measure both input and output with two different input voltages and perform the calculation You suggested before but the Gain is lower than 160. (from 120 to 140). I removed C25, C26, C27 and repeated the test with the same results. Then i removed also R44 and decrease the value of R31, R32 to 1K but it dosn't work properly...the Gain is absolutely not guaranteed to 160 but it change (from one board to another). The precision of resistor is 0,1%.
Do Analog Device have a solution? A correct and tested scheme for thermocouple to implement with this device?
If its not a good amplifier for thermocouple like reported on the first page of datasheet, which other low cost device i can use?
Thanks
Sandro