topic Re: FRDM33771CSPIEVB in Other NXP Products

FRDM33771CSPIEVB

harish89 — Tue, 10 Oct 2023 07:03:52 GMT

In the EVB MC33771C with SPI Interface, why 3k and 0.047uF, 2k and 0.1uF LPF has been used in the cell voltage measurement section of the AFE.

guoweisun — Wed, 11 Oct 2023 02:15:31 GMT

Just for filter out the high frequency noise inside of the battery line.

harish89 — Wed, 11 Oct 2023 05:15:25 GMT

Can we change those values or is it fixed to be used with the AFE.

guoweisun — Thu, 12 Oct 2023 01:43:07 GMT

Yes I think you can do that!

harish89 — Thu, 12 Oct 2023 05:07:33 GMT

So is there any application note just to see what values we can give to LPF at what frequency.

guoweisun — Thu, 12 Oct 2023 05:46:13 GMT

No app note for explain this, you can select the filter parameters by doing same test.