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LF398-N: LF398N issue at output voltage range.

Part Number: LF398-N

Hi,

I am using LF398N in my application. I am facing issues with the output voltage of the S/H which is not going more than 3.3v. 

The input is varying from 0 to 5v. 

VCC is 5v.

Logic is given to switching signal whose pulse width is 1ms and period is more than 100ms.

VCM=2.5v. 

The hold capacitor also holds only maximum of 3.3v. Is it not possible to get more than 3.3v output using LF398?

Thanks

Ramesh B