lQ
C
HARGE
-T
RANSFER
T
OUCH
S
ENSOR
QProx™ QT113
Projects a proximity field through air or any insulator
Less expensive than many mechanical switches
Sensitivity easily adjusted
Consensus filter for noise immunity
100% autocal for life - no adjustments required
2.5 to 5V, 600µA single supply operation
Toggle mode for on/off control (strap option)
10s, 60s, infinite auto-recal timeouts (strap options)
HeartBeat™ health indicator on output
Only one external part required - a 1¢ capacitor
Lead-Free package
Opt1
Opt2
3
4
Vdd
Out
1
2
8
7
6
5
Vss
Sns2
Sns1
Gain
QT113
APPLICATIONS -
Light switches
Prox sensors
Appliance control
Security systems
Access systems
Pointing devices
Elevator buttons
Consumer devices
The QT113 charge-transfer (“QT’”) touch sensor is a self-contained digital IC capable of detecting near-proximity or touch. It
will project a proximity sense field through air, and any dielectric like glass, plastic, stone, ceramic, and most kinds of wood. It
can also turn small metal-bearing objects into intrinsic sensors, making them responsive to proximity or touch. This capability
coupled with its ability to self calibrate continuously can lead to entirely new product concepts.
It is designed specifically for human interfaces, like control panels, appliances, toys, lighting controls, or anywhere a
mechanical switch or button may be found; it may also be used for some material sensing and control applications provided
that the presence duration of objects does not exceed the recalibration timeout interval.
Power consumption is only 600µA in most applications. In most cases the power supply need only be minimally regulated, for
example by Zener diodes or an inexpensive 3-terminal regulator. The QT113 requires only a common inexpensive capacitor
in order to function.
The QT113’s RISC core employs 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.
The option-selectable toggle mode permits on/off touch control, for example for light switch replacement. The
Quantum-pioneered HeartBeat™ signal is also included, allowing a microcontroller to monitor the health of the QT113
continuously if desired. By using the charge transfer principle, the IC delivers a level of performance clearly superior to older
technologies in a highly cost-effective package.
T
A
0 C to +70
0
C
-40
0
C to +85
0
C
0
AVAILABLE OPTIONS
SOIC
-
QT113-ISG
8-PIN DIP
QT113-DG
-
Copyright 1999-2004 QRG Ltd
R1.05/0405
QUANTUM [ QUANTUM RESEARCH GROUP ]
