lQ
QT1101
10 KEY QTOUCH™ SENSOR IC
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Patented charge-transfer (‘QT’) design
Ten independent QT sensing fields (keys)
2.8V ~ 5.5V single supply operation
24 23 22
20 19 18 17
21
40µA current typ @ 3V in 360ms LP mode
100% autocal for life - no adjustments required
Serial one or two wire interface with auto baud rate
Fully debounced results
SNS8
SNS8K
SNS9
SNS5
25
26
27
28
29
30
31
32
16
15
14
13
12
11
10
9
SNS4K
SNS4
SNS9K
N.C.
SNS3K
SNS3
QT1101
32-QFN
Patented AKS™ Adjacent Key Suppression
Spread spectrum bursts for superior noise rejection
Sync pin for excellent LF noise rejection
‘Fast mode’ for use in slider type applications
RoHS compliant 32-QFN, 48-SSOP packages
/CHANGE
1W
SNS2K
SNS2
RX
SNS1K
1
2
3
5
6
7
8
4
APPLICATIONS
! MP3 players
! Mobile phones
! PC peripherals
! Television controls
! Pointing devices
! Remote controls
QT1101 charge-transfer (‘QT’) QTouchTM IC is a self-contained, patented digital controller capable of detecting near-proximity or touch
on up to ten 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.
Patented AKS™ Adjacent Key Suppression 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.
AVAILABLE OPTIONS
TA
32-QFN
QT1101-ISG
48-SSOP
QT1101-IS48G
-400C to +850C
LQ
C
Copyright © 2005-2006 QRG Ltd
QT1101 R4.06/0806