At 03:38 PM 11/23/2004 -0700, you wrote:

>Done. I have a 0.1 uF and a 10 uF tantalum bypass capacitors across the 
>pin 1 and pin 8, literally. The power supply is well bypassed with 2 
>regulators. The firs regulates the 12 volts and the second, off the 12 
>volt regulator, is a LM2940-5.0 for 5 volts. Both check out fine.

The LM2940 data sheet recommends a minimum of 22uF on the output and 0.47uF
on the input to assure stability. LDOs are fussy about output caps.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com




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