QT1080 Просмотр технического описания (PDF) - Quantum Research Group
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QT1080 Datasheet PDF : 14 Pages
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lQ
z 8 completely independent QT touch sensing fields
z Designed for low-power portable applications
z 100% autocal for life - no adjustments required
z Direct outputs - either encoded or ‘per key’
z Fully debounced results
z 2.8V ~ 5.0V single supply operation
z 45µA current typ @ 3V in 360ms LP mode
z AKS™ Adjacent Key Suppression
z Spread spectrum bursts for superior noise rejection
z Sync pin for excellent LF noise rejection
z 10ms ‘fast mode’ for use in slider applications
z Pb-free packages: 32-QFN and 48-SSOP
QT1080
8 KEY QTOUCH™ SENSOR IC
24 23 22 21 20 19 18 17
OUT_0 25
OUT_1 26
OUT_2 27
OUT_3 28
OUT_4 29
OUT_5 30
OUT_6 31
OUT_7 32
QT1080
32-QFN
16 SNS5
15 SNS4K
14 SNS4
13 SNS3K
12 SNS3
11 SNS2K
10 SNS2
9 SN1K
1 234 56 78
APPLICATIONS
MP3 players
Mobile phones
PC peripherals
Television controls
Pointing devices
Remote controls
QT1080 charge-transfer (“QT’”) QTouch IC is a self-contained digital controller capable of detecting near-proximity or touch on up to 8
electrodes. It allows electrodes to project independent sense fields through any dielectric such as glass or plastic. This capability
coupled with its continuous self-calibration feature can lead to entirely new product concepts, adding high value to product designs. The
devices are designed specifically for human interfaces, like control panels, appliances, gaming devices, lighting controls, or anywhere a
mechanical switch or button may be found; they may also be used for some material sensing and control applications.
Each of the channels operates independently of the others, and each can be tuned for a unique sensitivity level by simply changing a
corresponding external Cs capacitor.
AKS™ Adjacent Key Suppression (patent pending) suppresses touch from weaker responding keys and allows only a dominant key to
detect, for example to solve the problem of large fingers on tightly spaced keys.
Spread spectrum burst technology provides superior noise rejection. These devices also have a SYNC/LP pin which allows for
synchronization with additional similar parts and/or to an external source to suppress interference, or, an LP (low power) mode which
conserves power.
By using the charge transfer principle, this device delivers a level of performance clearly superior to older technologies yet is highly
cost-effective.
This part is available in both 32-QFN and 48-SSOP lead-free packages.
TA
-40ºC to +85ºC
LQ
AVAILABLE OPTIONS
32-QFN
QT1080-ISG
48-SSOP
QT1080-IS48G
Copyright © 2004-2005 QRG Ltd
QT1080 R11.03/0905
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