lQ
6 K
EY
C
HARGE
-T
RANSFER
QT
OUCH
™
S
ENSOR
IC
QProx™ QT160 / QT161
6 completely independent touch circuits
Individual logic outputs per channel (active high)
Projects prox fields through any dielectric
Only one external capacitor required per channel
Sensitivity easily adjusted on a per-channel basis
100% autocal for life - no adjustments required
3-5.5V, 5mA single supply operation
Toggle mode for on/off control (strap option)
10s, 60s, infinite auto-recal timeout (strap options)
AKS™ Adjacent Key Suppression (QT160)
Less expensive per key than many mechanical switches
Eval board with backlighting - p/n E160
Pb-Free package available (QT160-ASG)
NOTE: Pinouts are not the same!
APPLICATIONS
PC Peripherals
Backlighted buttons
Appliance controls
Security systems
Access systems
Pointing devices
Instrument panels
Gaming machines
QT160 / QT161 charge-transfer (“QT’”) QTouch ICs are self-contained digital controllers capable of detecting near-proximity or
touch from up to 6 electrodes. They allow electrodes to project 6 independent sense fields through any dielectric like glass,
plastic, stone, ceramic, and wood. They can also make metal-bearing objects responsive to proximity or touch by turning them
into intrinsic sensors. These capabilities coupled with continuous self-calibration can lead to entirely new product concepts,
adding high value to product designs.
Each of the 6 channels operate independently of the others, and each can be tuned for a unique sensitivity level by simply
changing its sample capacitor value.
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. The option-selectable toggle mode permits on/off touch control, for example for light switch replacement.
The devices require only a common inexpensive capacitor per channel in order to function. The QT160 also offers the unique
adjacent key suppression (AKS™, patent pending) feature which 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.
In most cases the power supply need only be minimally regulated, for example by an inexpensive 3-terminal regulator.
The RISC core of these devices employ signal processing techniques pioneered by Quantum; these are specifically designed
to make the device survive real-world challenges, such as ‘stuck sensor’ conditions and signal drift.
By using the charge transfer principle, these parts deliver a level of performance clearly superior to older technologies yet are
highly cost-effective.
T
A
0
0
C to +70
0
C
-40
0
C to +105
0
C
-40
0
C to +105
0
C
0
0
C to +70
0
C
-40
0
C to +105
0
C
AVAILABLE OPTIONS
DIP-28
SSOP-28
QT160-D
-
-
QT161-D
-
-
QT160-AS
QT160-ASG
-
QT161-AS
Notes
Pb-Free
LQ
Copyright © 2002 QRG Ltd
QT160/161 1.07/0904
QUANTUM [ QUANTUM RESEARCH GROUP ]
