On Jan 29, 2008 3:46 PM, Bob Axtell wrote: > While on the Pericom website, I stumbled across an excellent > EMI Appnote (#11) that states categorically: > > "If there are OpAmps in a design, terminate unused opamps in dual > or quad packs by grounding the positive input to ground, then connecting > the negative input to the output." > Yup. Leaving them uncommitted causes problems with the other amps on the die. I've seen oscillation, and noise on adjacent stages. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist