AT42QT1011 Datasheet PDF - ATMEL Corporation
| Part Number | AT42QT1011 | |
| Description | One-channel Touch Sensor IC | |
| Manufacturers | ATMEL Corporation | |
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Features
• Number of Keys:
– One
– Configurable as either a single key or a proximity sensor
• Technology:
– 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
– Infinite max on-duration
• Applications:
– Control panels, consumer appliances, proximity sensor applications, toys,
lighting controls, mechanical switch or button,
• Patents:
– QTouch® (patented charge-transfer method)
– HeartBeat™ (monitors health of device)
www.DataSheet4U.com
One-channel
Touch Sensor
IC
AT42QT1011
9542G–AT42–03/10
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AT42QT1011
Figure 3-1. Fast Mode Bursts (SYNC Held High)
www.DataSheet4U.com
SNSK
SYNC
~1ms
3.1.3
Low Power Mode
The QT1011 runs in Low Power (LP) mode if the SYNC pin is held low. In this mode it sleeps for
approximately 80 ms at the end of each burst, saving power but slowing response. On detecting
a possible key touch, it temporarily switches to Fast mode until either the key touch is confirmed
or found to be spurious (via the detect integration process). It then returns to LP mode after the
key touch is resolved, as shown in Figure 3-2 on page 5.
Figure 3-2. Low Power Mode (SYNC Held Low)
SNSK
SYNC
~80 ms
Sleep
Sleep
Fast detect
integrator
Sleep
OUT
3.1.4
SYNC Mode
It is possible to synchronize the device to an external clock source by placing an appropriate
waveform on the SYNC pin. SYNC mode can synchronize multiple QT1011 devices to each
other to prevent cross-interference, or it can be used to enhance noise immunity from low
frequency sources such as 50Hz or 60Hz mains signals.
The SYNC pin is sampled at the end of each burst. If the device is in Fast mode and the SYNC
pin is sampled high, then the device continues to operate in Fast mode (Figure 3-1 on page 5). If
SYNC is sampled low, then the device goes to sleep. From then on, it will operate in SYNC
mode (Figure 3-2). Therefore, to guarantee entry into SYNC mode the low period of the SYNC
signal should be longer than the burst length (Figure 3-3 on page 6).
9542G–AT42–03/10
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for AT42QT1011 electronic component. |
| Information | Total 18 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ AT42QT1011.PDF Datasheet ] | |
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