EVK1040A Atmel, EVK1040A Datasheet - Page 9

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EVK1040A

Manufacturer Part Number
EVK1040A
Description
KIT EVALUATION FOR AT42QT1040
Manufacturer
Atmel
Series
Quantum, QTouch™r
Datasheets

Specifications of EVK1040A

Sensor Type
Touch, Capacitive
Sensing Range
4 Buttons/Keys
Interface
Discrete
Voltage - Supply
1.8 V ~ 5.5 V
Embedded
No
Utilized Ic / Part
AT42QT1040
Silicon Manufacturer
Atmel
Silicon Core Number
AT42QT1040
Kit Application Type
Sensing - Touch / Proximity
Application Sub Type
Capacitive Touch
Silicon Family Name
QTouch
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Sensitivity
-
Lead Free Status / Rohs Status
Supplier Unconfirmed
4.3
9524B–AT42–04/09
Speed Selection
Figure 4-1.
Speed selection is determined by a 1 M resistor (RFS resistor) connected between SNSK1
and either Vdd (Fast Mode) or Vss (Slow Mode).
Table 4-2.
In Fast Mode, the device sleeps for 16 ms between burst acquisitions. In Slow Mode, the device
sleeps for 64 ms between acquisitions. Hence, Slow Mode conserves more power but results in
slightly less responsiveness.
Note:
RFS Connected To...
Vdd
Vss
The RFS resistor should always be connected to either Vdd or Vss and not changed
during operation of the device. Changing the RFS option will affect the sensitivity of the
particular key. Always check that the sensitivity is suitable after a change. Retune Cs1 if
necessary.
~500 ns Pulse On OUT2 Pin
RFS Resistor
SNS0K
OUT2
SNS0K
OUT2
Power-on/
Reset
~20 ms
Mode
Fast mode
Slow mode
Pulse on OUT2
AT42QT1040
9

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