lQ QT1101
10 K
EY
QT
OUCH
™ S
ENSOR
IC
APPLICATIONS
! Pointing devices
! Remote controls
! PC peripherals
! Television controls
! MP3 players
! Mobile phones
QT1101 charge-transfer (‘QT’) QTouch
TM
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.
LQC
Copyright © 2005-2006 QRG Ltd
QT1101 R4.06/0806
" Patented charge-transfer (‘QT’) design
" Ten independent QT sensing fields (keys)
" 2.8V ~ 5.5V single supply operation
" 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
" 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
QT1101-IS48GQT1101-ISG-40
0
C to +85
0
C
48-SSOP32-QFNT
A
AVAILABLE OPTIONS
/RST
VDD
OSC
N.C.
SNS0
SNS0K
SNS1
SYNC/LP
DETECT
VSS
SNS7K
SNS7
SNS6K
SNS6
SNS5K
1W
/CHANGE
N.C.
SNS9K
SNS9
SNS8K
SNS8
SS
RX
1
23
4
5678
24 23 22
21
20 19 18 17
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
QT1101
32-QFN
SNS1K
SNS2
SNS2K
SNS3
SNS3K
SNS4
SNS4K
SNS5