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need for clarification about L9663 to sensor line

marcoconserva
Associate

According to the STM AN5366, a filter has to be interposed b/ween the PSI1 pin of the L9663 IC and the line to the sensor.

In my application, the sensor has an IDATA pin and a VDD pin as well, so my customer has developed a working demo circuit which has got a fork after the PSI1 pin: one line, unfiltered, reaches the sensor IDATA pin, while the other line of the fork gets filtered and reached the VDD pin.

Now, since I have to design an engineering board for that, I need to know whether the fork is actually needed or it is a mistake of my customer, and to know all pros and cons.

May I reach an STM expert please?

Thank you.

Regards,

Marco

 

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