Procedure to trim AD633

Hello Chupacabras,

AD633's accuracy is trimmed via laser-trim method. Figure 11 is used as compensation circuit to reduce nonlinearity errors on the input or output. its like a potentiometer that you can adjust depending on the offset that you are seeing that's why it was called a trim circuit.

Best Regards
Kenneth

Hi,

I believe that the question has already been answered so I am closing this thread. Thank you!

Regards,
Paul

Hi,

sorry for not responding. I figured out proper procedure on some other forum and I forgot to get back here.

This is the procedure:

1. set X=0V, Y=0V. and trim Z so the output is zero. (this results Z to be properly trimmed, because offsets on X and Y are negligible in this case)

2. set X=0V, Y=10V. and trim X so the output is zero. (this results X to be properly trimmed)

3. set X=10V, Y=0V. and trim Y so the output is zero. (this results Y to be properly trimmed)