opto isolator for SPI communication

Discussion in 'General Electronics Chat' started by gehan_s, Dec 14, 2012.

  1. gehan_s

    Thread Starter Active Member

    Sep 17, 2012
    Hi all,

    Can someone please suggest me a suitable opto-isolator for SPI communication. It should be cheap and thru-hole. This is to isolate a pic18f and a ade7758 ic. The SPI clock frequency will be about 1MHz.

    Even a digital isolator or a completely different method will also be ok as long as it electrically isolates while having a fast response time.

    Thanks in advance !!!!!
  2. John P

    AAC Fanatic!

    Oct 14, 2008
  3. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    Several chip companies now make digital isolators that literally have internal isolation structures (not sure how they achieve this) for both signal and power.

    However, being modern components they only come in SMD packages such as SOIC.

    MAX14850 is one, LTM2883 is another.

    They also provide isolated power. Very cool!