FRDM33771CSPIEVB

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harish89
Contributor II

Hi

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.

 

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guoweisun
NXP TechSupport
NXP TechSupport

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

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harish89
Contributor II

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

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guoweisun
NXP TechSupport
NXP TechSupport

Yes I think you can do that!

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harish89
Contributor II

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

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guoweisun
NXP TechSupport
NXP TechSupport

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

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guoweisun
NXP TechSupport
NXP TechSupport

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

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