AFE4490SPO2EVM: AFE4490

Mauricio Campelo-Tavares

Part Number: AFE4490SPO2EVM
Other Parts Discussed in Thread: AFE4490

Hello

We are starting an oximetry project using AFE4490 EVM.

Could someone clarify about the presence of "flying" 130 Ohm resistors on pins 5, 6 and 10 (all DNC)? Also on pin 7 (BG) and pins 34-35 (RX_OUTP and RX_OUTN)?

Thank you!

over 4 years ago

0 Praveen Aroul over 4 years ago

TI__Mastermind 49916 points

Hello Mauricio,

You may omit the resistors on the DNC, BG and RX_OUT pins.

0 Mauricio Campelo-Tavares over 4 years ago in reply to Praveen Aroul

Prodigy 20 points

Hello Praveen

Thanks for your fast and invaluable response!
However, I wish to understand WHY those resistors are present on EVM.

I ever heard that kind of element would be classified as stubs and difficult approval on EMI tests.

Could you gently clarify these points?

Regards!

0 Praveen Aroul over 4 years ago in reply to Mauricio Campelo-Tavares

TI__Mastermind 49916 points

They were placed on the EVM for easy access to the pins as these are some internal test signals.

There is no particular reason for choosing the 130 ohm.

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AFE4490SPO2EVM: AFE4490