>JK>I am planning to start a set of designs based on the AD698 LVDT
>JK>conditioning chip from Analog Dvices. It would be nice to know how
>JK>inherently immune it is to EMC before I start, as I could be building up
>JK>lots of problems for later
>Ok, if you're collecting a FAQ info....
>My experience with the the PIC16 is that even on a two sided board it
>passed Class B radiated with great margins.
I have heard that PIC's are very noisy, but I have used
them in plastic housings and been asked by the test house
to make sure the product was on! I had however thought
ahead and designed for a clock frequency of only 500kHz,
with very little external activity. I think the main
problem with PIC's is if you switch the external pins at
high speeds (MHz+) since they have a very high drive
capability (50mA +) and therfore generate very fast edges.
Gary Larkin. Potential Electronics, Brighton, England.
Electronic Disability Equipment Designer
Phone/Fax +44 (0)1273 564987.