E240B QUANTUM ATMEL, E240B Datasheet - Page 12
E240B
Manufacturer Part Number
E240B
Description
QT240 4 Key Qtouch Evaluation Kit
Manufacturer
QUANTUM ATMEL
Datasheet
1.E240B.pdf
(15 pages)
Specifications of E240B
Silicon Manufacturer
Atmel
Application Sub Type
Touch Sensor
Kit Application Type
Sensing - Touch / Proximity
Silicon Core Number
QT240
Kit Contents
Board And Literature
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
The sensitivity of the keys has been tailored to match the supplied plastic panel. To make a key
more sensitive, increase the value of its corresponding Cs capacitor (see chart below). To make
it less sensitive, decrease it’s Cs value. Only use 5% or 10% X7R ceramic capacitors; most other
types will be unstable and give erratic results.
C9 = Spread Spectrum Capacitor (see next page for details)
C5~C8 = Sample Capacitors (Cs) - increase to increase sensitivity
Key #
1
2
3
4
SENSITIVITY
Cs Capacitor
C5
C6
C7
C8
Factory Default
22nF
22nF
22nF
22nF
11