OPT101 with AFE4490

Hello Mohammad,

AFE44x0 had a built-in differential TIA and so there is no need to use OPT101 with AFE44x0.

I would like to understand your application. Is there any specific reason why you would want to use OPT101 (external TIA) with AFE44x0?

Best Regards.

There is no specific reason from a design perspective. I was originally designing my own AFE for a reflective pulse oximeter and so I bought a few OPT101 units. I wanted to know if they would still be useful with the AFE4490, but I suppose not.

In fact, I have the same situation. I have the OPT101 part for my oximeter application. It is possible to use it?

Hello,

As I mentioned in the thread above, AFE44x0 had a built-in differential TIA and so there is no need to use OPT101 with AFE44x0. 

Yes, Parveen I heard you. As I have this OPT101 I can use, I just wonder whether I can use it without spending money to buy another one, like NJL5501R.