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QT1G

更新时间: 2024-02-29 05:45:38
品牌 Logo 应用领域
高通 - QUALCOMM 传感器
页数 文件大小 规格书
14页 247K
描述
QLEVEL⑩ SENSOR IC

QT1G 技术参数

生命周期:Active包装说明:,
Reach Compliance Code:compliant风险等级:5.65
Is Samacsys:NBase Number Matches:1

QT1G 数据手册

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lQ  
QT114  
QLEVEL™ SENSOR IC  
" Limit sensing of almost any fluid or powder  
" Two-tier level sensor - Hi / Low limits with one probe  
" Only one external part required - a 5¢ capacitor  
" Uses internal probes or external electrodes  
" Active high or active low outputs  
" Slosh filter averages response of moving fluids  
" LED drive capable on both outputs  
" 2.5 to 5V 20µA single supply operation  
" HeartBeat™ health indicator on both outputs  
" RoHS compliant package  
Vcc  
Out1  
Out2  
Filt  
1
2
3
4
8
7
6
5
Gnd  
Sns2  
Sns1  
Pol  
APPLICATIONS -  
! Process controls  
! Vending machines  
! Consumer appliances  
! Automotive fluids  
! Medical fluid sensing  
! Soil moisture sensing  
DESCRIPTION -  
The QT114 QLevel™ charge-transfer (“QT”) sensor IC is specifically designed to detect point level in fluids and  
powders. It will project a sense field through almost any dielectric, like glass, plastic, or ceramic, to sense level on  
the inside of a vessel, from its exterior. It has the unique capability of independently sensing two trip points when  
used with structured electrodes having two tiers.  
The QT114 does not have sensing timeouts, drift compensation, or other functions which would interfere with level  
sensing. Its threshold levels are fixed, and the amount of signal required to exceed a threshold is dependent on  
circuit gain and electrode size and loading, all of which are under the control of the designer.  
The QT114 requires only a single inexpensive capacitor in order to function. One or two LEDs can also be added to  
provide a visual sensing indication.  
Power consumption is under 20mA in most applications, allowing operation from Lithium cells for many years. In  
most cases the power supply needs only minimal regulation.  
The QT114 employs numerous signal acquisition and processing techniques pioneered by Quantum. No external  
switches, opamps, or other analog components aside from CS are required.  
A unique feature is the 'slosh filter', a detection integrator which averages detections over a rolling 15 second  
interval before activating or deactivating the OUT pins. This filter allows use of the QT114 with violently moving  
fluids, for example in a moving vehicle, that would otherwise cause the outputs to flicker between two states.  
The device also includes selectable output polarity, allowing both output lines to be made either active-high or  
active-low. It also includes the Quantum-pioneered HeartBeat™ signal, allowing a host controller to monitor the  
health of the QT114 continuously if desired. By using the charge transfer principle, the IC delivers a level of  
performance clearly superior to older technologies. It is specifically designed to replace electromechanical devices  
like float switches, thermistors, and conductance probes.  
AVAILABLE OPTIONS  
TA  
SOIC  
8-PIN DIP  
QT114-DG  
-
00C to +700C  
-400C to +850C  
-
QT114-ISG  
lq  
Copyright © 1999-2006 QRG Ltd  
QT114 R1.04/1106  

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