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AFE4490: What should I choose for a medical product

Part Number: AFE4490
Other Parts Discussed in Thread: AFE4405

Dear team,

I have a medical customer which need to add an Oxygen Saturation (SpO2) meter feature to his line of products.

Can you please advise which devices are the most suitable for such an application, the AFE4490 or the cheaper AFE4405? (they prefer SPI interface) .

what is the main difference between them that cause such price differentials, Thanks?

Best regards,

Shai