Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

AT42QT1040-MMH Datasheet(PDF) 8 Page - ATMEL Corporation

Part # AT42QT1040-MMH
Description  QTouch??4-key Sensor IC
Download  18 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT42QT1040-MMH Datasheet(HTML) 8 Page - ATMEL Corporation

Back Button AT42QT1040-MMH Datasheet HTML 4Page - ATMEL Corporation AT42QT1040-MMH Datasheet HTML 5Page - ATMEL Corporation AT42QT1040-MMH Datasheet HTML 6Page - ATMEL Corporation AT42QT1040-MMH Datasheet HTML 7Page - ATMEL Corporation AT42QT1040-MMH Datasheet HTML 8Page - ATMEL Corporation AT42QT1040-MMH Datasheet HTML 9Page - ATMEL Corporation AT42QT1040-MMH Datasheet HTML 10Page - ATMEL Corporation AT42QT1040-MMH Datasheet HTML 11Page - ATMEL Corporation AT42QT1040-MMH Datasheet HTML 12Page - ATMEL Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 18 page
background image
8
9524B–AT42–04/09
AT42QT1040
4.
Detailed Operations
4.1
Adjacent Key Suppression
The use of AKS is selected by the connection of a 1 M
 resistor (RAKS resistor) between the
SNSK0 pin and either Vdd (AKS mode on) or Vss (AKS mode off).
Note:
Changing the RAKS option will affect the sensitivity of the particular key. Always check
that the sensitivity is suitable after a change. Retune Cs0 if necessary.
4.2
Discrete Outputs
There are four discrete outputs (channels 0 to 3), located on pins OUT0 to OUT3. An output pin
goes active when the corresponding key is touched. The outputs are open-drain type and are
active-low.
On the OUT2 pin there is a ~500 ns low pulse occuring approximately 20 ms after a power-
up/reset (see Figure 4-1 for an example oscilloscope trace of this pulse at two zoom levels). This
pulse may need to be considered from the system design perspective.
The discrete outputs have sufficient current sinking capability to directly drive LEDs. Try to limit
the sink current to less than 5 mA per output and be cautious if connecting LEDs to a power
supply other than Vdd; if the LED supply is higher than Vdd it may cause erratic behavior of the
QT1040 and “back-power” the QT1040 through its I/O pins.
Table 4-1.
RAKS Resistor
RAKS Connected To...
Mode
Vdd
AKS on
Vss
AKS off
The RAKS resistor should always be connected to either Vdd or Vss and should not be
changed during operation of the device.


Similar Part No. - AT42QT1040-MMH

ManufacturerPart #DatasheetDescription
logo
ATMEL Corporation
AT42QT1040 ATMEL-AT42QT1040_14 Datasheet
270Kb / 22P
   Four-key QTouch Touch Sensor IC
More results

Similar Description - AT42QT1040-MMH

ManufacturerPart #DatasheetDescription
logo
Quantum Research Group
QT240 QUANTUM-QT240 Datasheet
258Kb / 12P
   4 KEY QTOUCH SENSOR IC
QT240-ISSG QUANTUM-QT240-ISSG Datasheet
277Kb / 12P
   4 KEY QTOUCH SENSOR IC
QT220 QUANTUM-QT220 Datasheet
326Kb / 12P
   2 KEY QTOUCH SENSOR IC
QT1103 QUANTUM-QT1103 Datasheet
287Kb / 22P
   QTOUCH??10-KEY SENSOR IC
logo
ATMEL Corporation
AT42QT1111MU ATMEL-AT42QT1111MU Datasheet
701Kb / 50P
   QTouch??11-key Sensor IC
logo
Quantum Research Group
QT1100A QUANTUM-QT1100A Datasheet
561Kb / 42P
   10 KEY QTOUCH SENSOR IC
QT1101 QUANTUM-QT1101 Datasheet
234Kb / 16P
   10 KEY QTOUCH SENSOR IC
QT1080 QUANTUM-QT1080 Datasheet
205Kb / 16P
   8 KEY QTOUCH SENSOR IC
QT1081 QUANTUM-QT1081 Datasheet
246Kb / 20P
   8-KEY QTOUCH SENSOR IC
logo
ATMEL Corporation
AT42QT1111-MU ATMEL-AT42QT1111-MU Datasheet
713Kb / 50P
   QTouch 11-key Sensor IC
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com