QT161-AS Atmel, QT161-AS Datasheet

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QT161-AS

Manufacturer Part Number
QT161-AS
Description
IC SENSOR 6CHAN QTOUCH 28SSOP
Manufacturer
Atmel
Series
QProx™, QTouch™r
Type
Capacitiver
Datasheet

Specifications of QT161-AS

Touch Panel Interface
6, 2-Wire
Number Of Inputs/keys
6 Key
Resolution (bits)
10, 14 b
Voltage Reference
Internal
Voltage - Supply
3 V ~ 5.5 V
Current - Supply
8mA
Operating Temperature
-40°C ~ 105°C
Mounting Type
Surface Mount
Package / Case
28-SSOP
Output Type
*
Interface
*
Input Type
*
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
427-1080

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
QT161-ASG
Manufacturer:
Rohm
Quantity:
5 979
Part Number:
QT161-ASG
Manufacturer:
QUANTUM
Quantity:
20 000
lQ
APPLICATIONS
QT160 / QT161 charge-transfer (“QT’”) QTouch ICs are self-contained digital controllers capable of detecting near-proximity or
touch from up to 6 electrodes. They allow electrodes to project 6 independent sense fields through any dielectric like glass,
plastic, stone, ceramic, and wood. They can also make metal-bearing objects responsive to proximity or touch by turning them
into intrinsic sensors. These capabilities coupled with continuous self-calibration can lead to entirely new product concepts,
adding high value to product designs.
Each of the 6 channels operate independently of the others, and each can be tuned for a unique sensitivity level by simply
changing its sample capacitor value.
The devices are designed specifically for human interfaces, like control panels, appliances, gaming devices, lighting controls,
or anywhere a mechanical switch or button may be found; they may also be used for some material sensing and control
applications. The option-selectable toggle mode permits on/off touch control, for example for light switch replacement.
The devices require only a common inexpensive capacitor per channel in order to function. The QT160 also offers the unique
adjacent key suppression (AKS™, patent pending) feature which suppresses touch from weaker responding keys and allows
only a dominant key to detect, for example to solve the problem of large fingers on tightly spaced keys.
In most cases the power supply need only be minimally regulated, for example by an inexpensive 3-terminal regulator.
The RISC core of these devices employ 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.
By using the charge transfer principle, these parts deliver a level of performance clearly superior to older technologies yet are
highly cost-effective.
LQ
6 completely independent touch circuits
Individual logic outputs per channel (active high)
Projects prox fields through any dielectric
Only one external capacitor required per channel
Sensitivity easily adjusted on a per-channel basis
100% autocal for life - no adjustments required
3-5.5V, 5mA single supply operation
Toggle mode for on/off control (strap option)
10s, 60s, infinite auto-recal timeout (strap options)
AKS™ Adjacent Key Suppression (QT160)
Less expensive per key than many mechanical switches
Eval board with backlighting - p/n E160
PC Peripherals
Backlighted buttons
-40
-40
0
0
0
0
0
0
C to +70
C to +70
C to +105
C to +105
Appliance controls
Security systems
T
A
0
0
C
C
0
0
6 K
C
C
AVAILABLE OPTIONS
EY
C
QT160-AS
QT161-AS
SSOP-28
HARGE
-
-
Access systems
Pointing devices
QProx™ QT160 / QT161
-T
RANSFER
QT160-D
QT161-D
NOTE: Pinouts are not the same!
DIP-28
-
-
QT
Copyright © 2002 QRG Ltd
OUCH
QT160/161 1.06/1102
Instrument panels
Gaming machines
™ S
ENSOR
IC

Related parts for QT161-AS

QT161-AS Summary of contents

Page 1

... Security systems AVAILABLE OPTIONS T SSOP- + +105 C QT160- + +105 C QT161-AS QProx™ QT160 / QT161 -T QT RANSFER OUCH NOTE: Pinouts are not the same! Access systems Instrument panels Pointing devices Gaming machines DIP-28 QT160-D - QT161-D - Copyright © 2002 QRG Ltd QT160/161 1.06/1102 ™ ENSOR ...

Page 2

OVERVIEW QT160/161 is a 6-channel burst mode digital charge-transfer (QT) sensor designed specifically for touch controls; they include all hardware and signal processing functions necessary to provide stable sensing under a wide variety of conditions. Only a single ...

Page 3

Figure 1-2 Internal Switching & Timing Result Start not propagate fields laterally very well, and will have poor sensitivity in the middle. Experimentation is required. Since the channels acquire their signals in time-sequence, any of the 6 ...

Page 4

... Cs capacitors QT160/QT161 SPECIFICS 2.1 SIGNAL PROCESSING The QT160 processes all signals using 16 bit math, using a number of algorithms pioneered by Quantum. The algorithms are specifically designed to provide for high survivability in the face of adverse environmental changes ...

Page 5

Figure 2-1 Drift Compensation Signal Threshold R eference Output could be compensated for partially or entirely before even approaching the sense electrode. However, an obstruction over the sense pad, for which the sensor has already made full allowance for, could ...

Page 6

... Vss, so that it lights when the sensor is active. 2.3 AKS™ - Adjacent Key suppression The QT160 (not QT161) features adjacent key suppression for use in applications where keys are tightly spaced. If keys are very close and a large finger touches one key, the keys on either side might also activate ...

Page 7

ESD PROTECTION In cases where the electrode is placed behind a dielectric panel, the IC will be protected from direct static discharge. However even with a panel, transients can still flow into the electrodes via induction extreme ...

Page 8

... DD Operating temperature range, 4.5V - 5.5V (QT160-AS, QT161-AS -40 - +105C Operating temperature range, 3.0V - 4.5V (QT160-AS, QT161-AS -40 - +85C Operating temperature range (QT160-D, QT161-D) ...

Page 9

SIGNAL PROCESSING Description Threshold differential Hysteresis Consensus filter length (Detection integrator) Positive drift compensation rate Negative drift compensation rate Post-detection recalibration timer duration All curves at Vdd = 5.0V Burst Duration vs. Cs, Cx 18000 16000 14000 12000 10000 ...

Page 10

PACKAGE OUTLINES SYMBOL Min a 7.112 A 7.874 M 34.163 m 33.02 Q 0.584 P 0.406 L 0.203 L1 1.016 F 2.54 R 3.175 r 0.381 S 3.175 S1 3.632 Aa 7.874 x 8.128 Y 0.203 Seating level ...

Page 11

... OUT6 Detection output 6 (active high) 24 OPT1 25 OPT2 26 OSC_O 27 OSC_I 28 /RST Reset / recalibrate (active low ORDERING INFORMATION PART QT160-D QT160-AS QT161-D QT161-AS lQ Function Pin Positive power Positive power Channel 1 pin B Channel 2 pin B 10 Channel 3 pin Channel 4 pin Channel 5 pin Channel 6 pin B 17 ...

Page 12

Tel: +44 (0)23 8056 5600 Fax: +44 (0)23 8045 3939 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 ...

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