MCP3201 problems

[midali]

Hello Fratello,

Sounds like a hardware issue. I worked with LM2931 and i had some strange problems because I used a lower capacitance on output. Connect a 100uF (0,1uF is too low) near the stab pack on output line. "On work table" all are ok because may be you use a power supply who have a big capacitance. Also, when pic works with signals its necessary to decoupling with 10uF capacitance.

[fratello]

Thanks ....but I have already FULL decoupling...

[AvionicsMaster1]

Just curious if the symptoms change when the RPM is varied?

[fratello]

Nope ! No change !