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Datasheets

AT42QT1040

AT42QT1040 Complete
( file size: 255KB , 22 pages , revision D , updated: 05/2013 )

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Digital burst mode, charge-transfer (QT™) capacitive sensor driver designed for touch-key applications. It can sense from one to four keys-one to three keys can be disabled by not installing their respective sense capacitors. The device includes all signal processing functions necessary to provide stable sensing under a wide variety of changing conditions. The outputs are fully debounced. Only a few external parts are required for operation. The device modulates its bursts in a spread-spectrum fashion in order to heavily suppress the effects of external noise and to suppress RF emissions.

Key Parameters

Parameter
Value

Pin Count:

20

Touch Sensor Type:

Buttons

# of Touch Channels:

4

Temp. Range (deg C):

-40 to 85

Operating Voltage (Vcc):

1.8 to 5.5

Interface Type:

Pin-per-key

Acquisition Method:

QTouch

 

Ordering Codes

Ordering Code Package Speed Power Supply Operational Range Comment Buy Online Samples
AT42QT1040-MMH VQFN 20M2 20 Buy Request