Hi folks,
Got hold of a few INA326's, have been perusing the datasheet and trying them out in a test circuit to try and get a feel for things. I have tried to follow the example circuit as I saw it on page 9 of the datasheet. Gain is arbitrarily set at 2.4 . I have some ASIC pressure transducers that I am intending to use in conjunction with these IC's. Unfortunately I don't seem to be getting the results I was expecting. When Vin- and Vin+ are relatively close together the gain drops dramatically. After a Vdiff of around 200mV things start to settle down. I have done some other tests with Vin- at 0V and 2.5V and I get very similar results with the gain rapidly settling towards 2.4 after 200mV. It is more than likely something I am doing wrong which I haven't understood from the datasheet. I have attached the test circuit and tabulated the results. If someone can point me in the right direction that would be great...!
Thanks.
Got hold of a few INA326's, have been perusing the datasheet and trying them out in a test circuit to try and get a feel for things. I have tried to follow the example circuit as I saw it on page 9 of the datasheet. Gain is arbitrarily set at 2.4 . I have some ASIC pressure transducers that I am intending to use in conjunction with these IC's. Unfortunately I don't seem to be getting the results I was expecting. When Vin- and Vin+ are relatively close together the gain drops dramatically. After a Vdiff of around 200mV things start to settle down. I have done some other tests with Vin- at 0V and 2.5V and I get very similar results with the gain rapidly settling towards 2.4 after 200mV. It is more than likely something I am doing wrong which I haven't understood from the datasheet. I have attached the test circuit and tabulated the results. If someone can point me in the right direction that would be great...!
Thanks.
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