hi,
When calibrate(full-scale), I guess the device will change internal channel to reference 2.5V.
This is ok when gain is 1.
But when i set gain to 32, and perform full-scale calibrate, will it give correct result? will it overflow?
will the device generate correct input voltage when i change diffent gain by himself?
Need I provide different input voltage externally to calibrate different gain when i use full-scale calibration?
Best regardings
Hi Jiazhi,
I apologized for the late response, I'm on time bank now, and also the primary engineer who support this device is on vacation and he will come back next Monday. Please allow a delay for the support.
Regarding your questions, you can use a different gain and corresponding input FSR signal to perform gain calibration, however you won't be able to use GANCAL command to do that.
As you can see the block diagram below from the datasheet, when you use a different gain (not 1), your input signal passes through the same amplifier stage, so the error should be same. However, if you bypass the PGA, the signal path will be different, so a different error is expected.
Regards,
Dale
