!MPR084 sensitivity problem!

[Lenzh]

I used MPR084 with LL16 and the system power supply is 3V. When the supply fall down to 2.8V, the MPR084 is not very sensitive. Why and how to solve?

Thank you! 

[Helton]

I have a like problem!

I am developing one application of a MPR084 capacitive touch sensor with MC9S08QE8RM.
But i have many problems!
The project consist at the access control interface.
The interface has twelve capacitive touch pads. The user enter their password in this pads.
The sensor does not detect pads when i put acrylic or polycarbonate plate of 1mm.
When i put the acrylic or polycarbonate plate of 1mm the detection does not occur or occurs intermittently.
when adjust the sensitivity (increasing the sensitivity, in Sensitivity Threshold Registers) the error in detection occurs.
Do you have a specific document for calibration of the MPR084.
What should I do?

[Mickey]

Change the electrode lines pull-up resistor to 1M. or greater resistance value.