On 9/24/06, Vasile Surducan wrote: > A SPI would require three optocouplers if I don't mistake, two for > data and one for clk. It's quite interesting you want separate ADC > than a multiplexed solution. That means you need isolation for every > channel ? You're designing a sort of recording device ? > > Yes channel to channel isolation makes the whole design much more difficult! The power supply design is not easy. The whole design concept becomes very tricky, especially the space constraint. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist