QT110-ISG Atmel, QT110-ISG Datasheet

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QT110-ISG

Manufacturer Part Number
QT110-ISG
Description
IC SENSOR TOUCH/PROX 1CHAN 8SOIC
Manufacturer
Atmel
Series
QTouch™r
Type
Capacitiver
Datasheet

Specifications of QT110-ISG

Touch Panel Interface
1, 2-Wire
Number Of Inputs/keys
1 Key
Resolution (bits)
14 b
Data Interface
Serial
Voltage Reference
Internal
Voltage - Supply
2.5V, 3.3V, 5V
Current - Supply
26µA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Output Type
Logic
Interface
2-Wire
Input Type
Logic
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
427-1092-2
lQ
APPLICATIONS -
The QT110 charge-transfer (“QT’”) sensor IC is a self-contained digital IC used to implement near-proximity or touch sensors. It
projects sense fields through almost any dielectric, like glass, plastic, stone, ceramic, and wood. It 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.
The QT110 is 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.
This IC requires only a common inexpensive capacitor in order to function. Average power consumption is under 20µA in most
applications, allowing battery operation.
The QT110 employs digital signal processing techniques pioneered by Quantum, designed to make it 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 device includes 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, the QT110 delivers 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
Pb-Free packages
-40
0
0
C to +70
0
C to +85
T
A
Appliance control
Security systems
0
C
0
C
AVAILABLE OPTIONS (Pb-FREE)
QT110-ISG
SOIC
-
Access systems
Pointing devices
©1999-2004 Quantum Research Group
Opt1
Opt2
8-PIN DIP
QT110-DG
Vdd
QT
Out
-
OUCH
1
2
3
4
Elevator buttons
Consumer electronics
™ S
8
7
6
5
QT110 R1.04/0405
ENSOR
QT110
Vss
Sns2
Sns1
Gain
IC

Related parts for QT110-ISG

QT110-ISG Summary of contents

Page 1

... By using the charge transfer principle, the QT110 delivers a level of performance clearly superior to older technologies in a highly cost-effective package + +85 lq Appliance control Access systems Security systems Pointing devices AVAILABLE OPTIONS (Pb-FREE) SOIC QT110-ISG QT ™ S OUCH ENSOR Vdd 1 8 Out 2 7 Opt1 3 6 Opt2 4 5 Elevator buttons Consumer electronics 8-PIN DIP QT110-DG - © ...

Page 2

... X7R type changes with temperature, the internal drift compensation mechanism also adjusts for the drift automatically. Piezo sounder drive: The QT110 can drive a piezo sounder after a detection for feedback. The piezo sounder replaces or augments the Cs capacitor; this works since piezo sounders are also capacitors, albeit with a large thermal drift coefficient ...

Page 3

... S ENSITIVITY The QT110 can be set for one of 3 gain levels using option pin 5 (Table 1-1). If left open, the gain setting is high. The sensitivity change is made by altering the numerical threshold level required for a detection also a function of other ...

Page 4

... However, the supply drain is so low simple matter to treat the entire controllable load; simply driving the QT110's Vdd pin directly from another logic gate or a microprocessor port (Figure 2-2) will serve as both power and 'forced recal'. The source resistance of most CMOS gates and microprocessors is low enough to provide direct power without any problems ...

Page 5

... Out to ground (Figure 2-6). 2.2.6 O The QT110’s output is active low ; it can source 1mA or sink 5mA of non-inductive current. Care should be taken when the IC and the load are both powered from the same supply, and the supply is minimally regulated ...

Page 6

... Detection ‘stiction’, the opposite effect, can occur if a load is shed when Out is active. The output of the QT110 can directly drive a resistively limited LED. The LED should be connected with its cathode to the output and its anode towards Vcc, so that it lights when the sensor is active-low ...

Page 7

... Maximize Re to the limit where sensitivity is not affected not place the electrode or its connecting trace near other traces, or near a ground plane use a ground plane under and around the QT110 itself, back to the regulator and power connector (but not beyond the Cs capacitor). ...

Page 8

... unless otherwise noted. Min Typ Max 3.1 4.7 6. 750 +125 X7R ceramic Notes ms µ 5.0V Vdd ms @ 3.3V Vdd ms ms kHz ms ms µs kHz Units Notes % Note 1 % Note 1 % Note 1 % Note 2 samples ms/level ms/level secs Note 3 QT110 R1.04/0405 O C ...

Page 9

... Figure 4-2 Medium Gain Sensitivity and Range @ Vdd = 3V 4.0 3.0 2.0 1.0 Valid operating range 10 20 Cs, nF Figure 4-4 Typical Supply Current Vs Vdd Rs = 470K 10pF, Gain = High 20nF 10nF 10 5 2.5 3 3.5 Vdd QT110 R1.04/0405 Cx=30pF 25pF 20pF 10pF 5pF 0pF 30 4 4.5 5 ...

Page 10

... Inches Min Max 0.189 0.196 0.229 0.244 0.15 0.157 0.054 0.068 0.004 0.01 0.050 0.05 0.014 0.019 0.02 0.04 0.007 0.01 0.229 0.03 0º 8º QT110 R1.04/0405 Notes Typical BSC Typical BSC Notes BSC ...

Page 11

... ORDERING INFORMATION PART QT110-DG QT110-ISG LQ TEMP RANGE PACKAGE 0 - 70C PDIP Lead-Free -40 - 85C SOIC-8 Lead-Free 11 MARKING QT1 + 10G or QT110-G QT1 + IG or QT110-IG QT110 R1.04/0405 ...

Page 12

Tel: +44 (0)23 8056 5600 Fax: +44 (0)23 8045 3939 This device covered under one or more of the following United States and international patents: 5,730,165, 6,288,707, 6,377,009, 6,452,514, 6,457,355, 6,466,036, 6,535,200. Numerous further patents are pending which may ...

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