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2V to 5V single supply operation
10µA low power mode @ 2V
µ
Self-calibrating on power-up
Sensitivity easily adjusted
Consensus filter for noise immunity
Autorecalibration timeout
HeartBeat™ health indicator on output
Only a few passive external parts required
RoHS compliant SOT23-6 package
QT100
C
HARGE
-T
RANSFER
QT
OUCH
™
IC
OUT
VSS
SNSK
1
2
3
6
5
4
SYNC/MODE
VDD
SNS
The QT100 charge-transfer (‘QT’) touch sensor is a self-contained digital IC capable of detecting near-proximity or touch. It will
project a touch or proximity field through any dielectric like glass, plastic, stone, ceramic, and even 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, 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.
Power consumption is less than 500µA in most applications when running in Fast response mode. This typically drops to
5-10µA at 2V V
DD
in Low Power mode, depending on the burst length. In most cases the power supply need only be minimally
regulated; for example, by Zener diodes or an inexpensive three-terminal regulator. The QT100 only requires a common
inexpensive X7R ceramic capacitor in order to function.
The QT100’s Reduced Instruction Set Computer ( RISC) core employs signal processing techniques pioneer ed by Quantum;
these are specifically designed to make the device survive real-world challenges, such as ‘stuck sensor’ conditions and signal
drift.
The Quantum-pioneered HeartBeat™ signal is also included, allowing a microcontroller to monitor the health of the QT100
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
-40ºC to +85ºC
AVAILABLE OPTIONS
6-pin SOT23-6
QT100-ISG
LQ
C
Copyright © 2006 QRG Ltd
QT100-ISG R3.06/0606
QUANTUM [ QUANTUM RESEARCH GROUP ]
