[Led Display Digital voltmeter problem with 200mv scale]

Hi audioguru.. I've the Intersil one.
Reading the Intersil datasheet the accuracy is about +-2 counts and it would be fine for me.
But the last digit it's much more unstable.
So, i guess that the only way is to improve the passive components quality to reduce noise (I use carbon film resistors) or just use the Maxim ic!
Maybe Kevin is right.. you can't pretend too much from a meter.
Thank you for the answers (sorry for my english! ;D).

[Led Display Digital voltmeter problem with 200mv scale]

I've the digital voltmeter with 1cl7107.
I've used the schematic and components recommended on the datasheet for 200mV scale, so the max number on the display is 199.9
My problem is that the last digit seems to be very unstable.. it changes between +-4 numbers.
It's only a noise problem or there is other reason?