LTC6244 - Peak detector (hold time)


About the "Improved Peak Detector" available here:

Demo Circuit:

I would like to measure the DC with an voltmeter, so the holding time must be, at least, 3~5 seconds, and the LTSpice show me a holding time of only 1~2 ms.

I tried increase the capacitor (C1) value, as well R4 and R6, but with no success.

May someone give me a help about how to increase the holding time to 3~5 seconds?

Thanks in advance,