Rainbow Electronics AT42QT1010 User Manual
Features
• Number of Keys:
–One
– Configurable as either a single key or a proximity sensor
• Techn ology:
– Patented spread-spectrum charge-transfer (direct mode)
• Key outline sizes:
– 6 mm x 6 mm or larger (panel thickness dependent); widely different sizes and
shapes possible
• Electrode design:
– Solid or ring electrode shapes
• PCB Layers required:
–One
• Electrode materials:
– Etched copper, silver, carbon, Indium Tin Oxide (ITO)
• Electrode substrates:
– PCB, FPCB, plastic films, glass
• Panel materials:
– Plastic, glass, composites, painted surfaces (low particle density metallic paints
possible)
• Panel thickness:
– Up to 12 mm glass, 6 mm plastic (electrode size and Cs dependent)
• Key sensitivity:
– Settable via capacitor (Cs)
• Interface:
– Digital output, active high
• Moisture tolerance:
–Good
• Power:
– 1.8V – 5.5V; 17 µA at 1.8V typical
• Package:
– 6-pin SOT23-6 RoHS compliant
• Signal processing:
– Self-calibration, auto drift compensation, noise filtering
• Applications:
– Control panels, consumer appliances, proximity sensor applications, toys,
lighting controls, mechanical switch or button,
• Patents:
–QTouch
– HeartBeat
®
(patented charge-transfer method)
™
(monitors health of device)
One-channel
Touch Sensor
IC
AT42QT1010
Summary
Note: This is a summary document.
A complete document is available.
For more information contact
www.atmel.com/touch.
9541ES–AT42–02/10
1. Pinout and Schematic
SNSK
VSS
OUT
4
1
2
3
5
6
VDD
SNS
SYNC/MODE
1.1 Pinout Configuration
1.2 Pin Descriptions
Table 1-1. Pin Listing
Name Pin Type Comments If Unused, Connect To...
OUT 1 O Output state –
Vss 2 P Supply ground –
SNSK 3 I/O Sense pin Cs + Key
SNS 4 I/O Sense pin Cs
Vdd 5 P Power –
SYNC 6 I SYNC and Mode Input
I Input only I/O Input and output
O Output only, push-pull P Ground or power
Pin is either SYNC/Slow/Fast Mode, depending on logic level
applied
2
AT42QT1010
9541ES–AT42–02/10
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