What should be noted in MRI for nRF54L15 hardware design

[Tom.Fu]

Hi Support Team

Customer's end product needs to test in MRI when the product is completely powered off. Customer concerns that the following three components will be infected such as demagnetization and heat generation during the testing, and causes the nRF54L15 and nPM1304 to fail to operate normally after the MRI testing. The end product needs to pass MRI testing of 3 Tesla. Do you have any suggestions. Many thanks.

[Ressa]

Hi, 

Thanks for contacting us.
The devices you are referring to (nRF54L15 and nPM1304) are not tested in MRI conditions. But I can give my general opinion about the question:
 Regarding the application you mentioned, if the device containing nRF54L15 and nPM1304 is going to be off during MRI scan, then safest approach is to use non magnetic, paramagnetic, (or less sensitive) components for the hardware. Using inductors (or any other components) that have ferromagnetic core is not good as they can react strongly to the external magnetic field. using air core inductors can be a possible approach for consideration, although the inductor size will be bigger. RF shielding can be useful as well, as it can protect the circuit from varying magnetic fields (non static). 

Best regards,
Ressa