Jinx wrote: > Microchip's analogue model says that leakage is +/- 0.5uA. Presumably > they're referring to source and sink current ? How would +/- apply to > a steady input ? The pin could either source or sink up to 500nA. > A constant error that could be compensated for in s/w ? No, it can change over time, temperature, and other factors you can't predict or control. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist