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AT42QT1040 Datasheet PDF

Part Series:
AT42QT1040 Series
Category:
Capacitive Touch Sensors
Description:
Analog Circuit, 1 Func, PQCC20, 3 X 3MM, 0.85MM HEIGHT, 0.45MM PITCH, ROHS COMPLIANT, PLASTIC, VQFN-20
Updated Time: 2023/01/13 02:59:50 (UTC + 8)

AT42QT1040 Capacitive Touch Sensors Datasheet PDF

AT42QT1040-MMH - ATMEL Specifications

TYPE
DESCRIPTION
Mounting Style
Surface Mount
Number of Pins
20 Pin
Supply Voltage (DC)
1.80V (min)
Case/Package
QFN-20
Output Voltage
0.7.4.4 V
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AT42QT1040-MMH - ATMEL Function Overview

The AT42QT1040-MMH is a 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.
Up to 4 QTouch® keys
4 Discrete outputs indicating individual key touch
Patented spread-spectrum charge-transfer (direct mode)
Simple self-capacitance style
Etched copper, silver, carbon, indium tin-oxide (ITO)
PCB, FPCB, plastic films, glass electrode substrates
Plastic, glass, composites, painted surfaces panel
Up to 10mm glass, 5mm plastic panel
Fixed key threshold, sensitivity adjusted via sample capacitor value key sensitivity
Adjacent key suppression
Stress rating only and functional operation of the device at these or other conditions beyond those indicated in the operational sections of this specification is not implied.
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