opto isolator for SPI communication

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 !!!!!

6N137 - very common part and good to a few MHz

I've just used a pc123 for a similar purpose, it was what was in my scrap box, think it came out of a pc power supply.