QT110H QUANTUM [Quantum Research Group], QT110H Datasheet

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QT110H

Manufacturer Part Number
QT110H
Description
SENSOR ICs
Manufacturer
QUANTUM [Quantum Research Group]
Datasheet
lQ
APPLICATIONS -
The QT110 / QT110H charge-transfer (“QT’”) sensor chips are self-contained digital ICs used to implement near-proximity or touch
sensors. They project sense fields through almost any dielectric, like glass, plastic, stone, ceramic, and wood. They can also turn small
metal-bearing objects into intrinsic sensors, making them respond to proximity or touch. This capability coupled with an ability to
self-calibrate continuously leads to entirely new product concepts.
These devices are designed specifically for human interfaces, like control panels, appliances, toys, lighting controls, or anywhere a
mechanical switch or button may be found; they 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.
A piezo element can also be connected to create a feedback click sound.
These ICs require only a common inexpensive capacitor in order to function. Average power consumption is under 20µA in most
applications, allowing battery operation.
The devices employ digital signal processing techniques pioneered by Quantum, designed to make them survive real-world challenges,
such as ‘stuck sensor’ conditions and signal drift. Sensitivity is digitally determined for the highest possible stability. No external active
components are required for operation.
The devices include several user-selectable built-in features. One, toggle mode, permits on/off touch control for example for light switch
replacement. Another makes the sensor output a pulse instead of a DC level, which allows the device to 'talk' over the power rail,
permitting a simple 2-wire twisted-pair interface. Quantum’s unique HeartBeat™ signal is also included, allowing a host controller to
continuously monitor sensor health.
By using the charge transfer principle, these ICs deliver a level of performance clearly superior to older technologies in a highly
cost-effective package.
lq
Light switches
Industrial panels
Less expensive than many mechanical switches
Projects a ‘touch button’ through any dielectric
100% autocal for life - no adjustments required
No active external components
Piezo sounder direct drive for ‘tactile’ click feedback
LED drive for visual feedback
2.5 ~ 5V single supply operation
10µA at 2.5V - very low power drain
Toggle mode for on/off control (via option pins)
10s or 60s auto-recalibration timeout (via option pins)
Pulse output mode (via option pins)
Gain settings in 3 discrete levels
Simple 2-wire operation possible
HeartBeat™ health indicator on output
Active low (QT110), active high (QT110H) versions
-40
-40
0
0
0
0
C to +70
C to +70
0
0
C to +85
C to +85
T
A
Appliance control
Security systems
0
0
C
C
0
0
C
C
AVAILABLE OPTIONS
QT110H-IS
QT110-IS
SOIC
-
-
Access systems
Pointing devices
©1999-2004 Quantum Research Group
QT110 / QT110H
QT
Opt1
Opt2
8-PIN DIP
Vdd
QT110H-D
Out
QT110-D
OUCH
-
-
1
2
3
4
™ S
Elevator buttons
Consumer electronics
QT110/110H R1.03/0604
8
7
6
5
ENSOR
Vss
Sns2
Sns1
Gain
IC
s

Related parts for QT110H

QT110H Summary of contents

Page 1

... Light switches Industrial panels The QT110 / QT110H charge-transfer (“QT’”) sensor chips are self-contained digital ICs used to implement near-proximity or touch sensors. They project sense fields through almost any dielectric, like glass, plastic, stone, ceramic, and wood. They can also turn small metal-bearing objects into intrinsic sensors, making them respond to proximity or touch ...

Page 2

... SNS1 and SNS2 to make the piezo (if installed) sound a short tone for 75ms immediately after detection, to act as an audible confirmation. Option pins allow the selection or alteration of several other special features and sensitivity. Figure 1-2 2-wire operation, self-powered (not QT110H) 3.5 - 5.5V CMOS 1K Twisted 1N4148 ...

Page 3

By implication it requires that the signal ground and the target object must both be coupled together in some manner for a capacitive sensor to operate properly. Note that there is no need to provide actual hardwired ground ...

Page 4

... ODE UTPUT The output of the device can respond mode, where the output is active-low (QT110) or active-high (QT110H) upon detection. The output will remain active for the duration of the Figure 2-1 Drift Compensation Signal Threshold R eference ...

Page 5

... CMOS input, by doing nothing or at most adding a small non-critical capacitor from Out to ground (Figure 2-6). 2.2.6 O The QT110’s output is active low (QT110) or active high (QT110H) and can source 1mA or sink 5mA of non-inductive current. 5 Figure 2-3 Damping Piezo Clicks with R +2 ...

Page 6

... Vcc, so that it lights when the sensor is active-low. If desired the LED can be connected from Out to ground, and driven on when the sensor is inactive, but only with less drive current (1mA). QT110H: This part is active-high works in reverse to that described above CIRCUIT GUIDELINES 3.1 SAMPLE CAPACITOR When used for most applications, the charge sampler Cs can be virtually any plastic film or good quality ceramic capacitor ...

Page 7

Vdd disturbances that will interfere with the acquisition process. This can usually be solved by adding a small extra load from Vdd to ground, such as 10K ohms, to provide a minimum load on the ...

Page 8

ABSOLUTE MAXIMUM SPECIFICATIONS Operating temp ...

Page 9

DC SPECIFICATIONS Vdd = 3. 10nF 470K 10pF, Gain = High Parameter Description V Guaranteed min Vdd DDL I Supply current DD V Supply turn-on slope DDS V Low input ...

Page 10

MECHANICAL SYMBOL Min a 6.096 A 7.62 M 9.017 m 7.62 Q 0.889 P 0.254 L 0.355 L1 1.397 F 2.489 R 3.048 r 0.381 S 3.048 7.62 x 8.128 Y 0.203 SYMBOL Min M 4.800 ...

Page 11

... ORDERING INFORMATION PART QT110-D QT110-IS QT110H-D QT110H-IS LQ TEMP RANGE PACKAGE 0 - 70C PDIP -40 - 85C SOIC 70C PDIP -40 - 85C SOIC-8 11 MARKING QT1 + 10 or QT110 QT1 + I or QT110-I QT1 +10H or QT110H QT1 + AI or QT110H-I QT110/110H R1.03/0604 ...

Page 12

Tel: +44 (0)23 8056 5600 Fax: +44 (0)23 80565600 The specifications set out in this document are subject to change without notice. All products sold and services supplied by QRG are subject to our Terms and Conditions of sale ...

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