QT113-S Atmel, QT113-S Datasheet

QT113-S

Manufacturer Part Number

QT113-S

Description

SENSOR IC TOUCH/PROXMTY 1CH8SOIC

Manufacturer

Atmel

Series

QProx™r

Type

Capacitiver

Datasheet

1.QT113-D.pdf (12 pages)

Specifications of QT113-S

Rohs Status

RoHS non-compliant

Touch Panel Interface

1, 2-Wire

Number Of Inputs/keys

1 Key

Resolution (bits)

14 b

Data Interface

Serial

Voltage Reference

Internal

Voltage - Supply

2.45 V ~ 5.25 V

Current - Supply

600µA

Operating Temperature

0°C ~ 70°C

Mounting Type

Surface Mount

Package / Case

8-SOIC (3.9mm Width)

Output Type

Logic

Input Type

Logic

Interface

Other names

427-1010

Current page: 1 of 12
Download datasheet (179Kb)

APPLICATIONS -

The QT113 charge-transfer (“QT’”) touch sensor is a self-contained digital IC capable of detecting near-proximity or touch. It will

project a proximity sense field through air, via almost any dielectric, like glass, plastic, stone, ceramic, and 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 continuously 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; it 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.

The QT113 requires only a common inexpensive capacitor in order to function.

Power consumption is only 600 A in most applications. In most cases the power supply need only be minimally regulated, for example

by Zener diodes or an inexpensive 3-terminal regulator.

The QT113’s RISC core employs 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. Even sensitivity is digitally determined and

remains constant in the face of large variations in sample capacitor C

analog components aside from C

The option-selectable toggle mode permits on/off touch control, for example for light switch replacement. The Quantum-pioneered

HeartBeat™ signal is also included, allowing a host microcontroller to monitor the health of the QT113 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.

Quantum Research Group Ltd

! ! ! ! Projects a proximity field through air

! ! ! ! Less expensive than many mechanical switches

! ! ! ! Sensitivity easily adjusted via capacitor value

! ! ! ! Turns small objects into intrinsic touch sensors

! ! ! ! 100% autocal for life - no adjustments required

! ! ! ! 2.5 to 5V, 600 A single supply operation

! ! ! ! Toggle mode for on/off control (strap option)

! ! ! ! 10s, 60s, infinite auto-recal timeout (strap options)

! ! ! ! Gain settings in 2 discrete levels

! ! ! ! HeartBeat™ health indicator on output

! ! ! ! Active-low (QT113) or active-high outputs (QT113H)

! ! ! ! Only one external part required - a 1¢ capacitor

Light switches

Prox sensors

-40

are usually required.

C to +70

C to +85

Appliance control

Security systems

AVAILABLE OPTIONS

QT113H-IS

QT113H-S

QT113-IS

QT113-S

SOIC

Access systems

Pointing devices

HARGE

and electrode C

QProx™ ™ ™ ™ QT113 / QT113H

-T

O pt1

O pt2

QT113H-D

V d d

8-PIN DIP

O ut

QT113-D

RANSFER

. No external switches, opamps, or other

Elevator buttons

Toys & games

OUCH

R1.10/0104

ENSOR

Vss

Sn s2

Sn s1

Gain

Related parts for QT113-S

QT113-S Summary of contents

Page 1

... IC delivers a level of performance clearly superior to older technologies in a highly cost-effective package -40 -40 Quantum Research Group Ltd C HARGE ! Appliance control ! Access systems ! Security systems ! Pointing devices S AVAILABLE OPTIONS T SOIC +70 C QT113 +70 C QT113H +85 C QT113- +85 C QT113H-IS QProx™ ™ ™ ™ QT113 / QT113H -T T RANSFER OUCH pt1 3 O pt2 ...

Page 2

... The QT switches and charge measurement hardware functions are all internal to the QT113 (Figure 1-2). A 14-bit single-slope switched capacitor ADC includes both the required QT charge and transfer switches in a configuration that provides direct ADC conversion. The ADC is designed to ...

Page 3

... S ENSITIVITY The QT113 can be set for one of 2 gain levels using option pin 5 (Table 1-1). This sensitivity change is made by altering the internal numerical threshold level required for a detection. Note that sensitivity is also a function of other things: like the ...

Page 4

... Decreasing Sensitivity In some cases the QT113 may be too sensitive, even on low gain. In this case gain can be lowered further by a number of strategies: making the electrode smaller, making the ...

Page 5

... OPT1 and OPT2. All options are shown in Table 2-1. 2.2 The output of the QT113 can respond mode, where the output is active-low upon detection. The output will remain active-low for the duration of the detection, or until the Max On-Duration expires (if not infinite), whichever occurs first ...

Page 6

... O D UTPUT RIVE The QT113’s `output is active low and can sink up to 5mA of non-inductive current inductive load is used, such as a small relay, the load should be diode clamped to prevent damage. When set to operate in a proximity mode (at high gain) the current should be limited to 1mA to prevent gain ...

Page 7

... The currents should not be allowed to traverse the area directly under the QT113. If the QT113 is connected to an external circuit via a cable or long twisted pair possible for ground-bounce to cause damage to the Out pin; even though the transients are led ...

Page 8

ABSOLUTE MAXIMUM SPECIFICATIONS Operating temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 9

DC SPECIFICATIONS Vdd = 3.0V 10nF 5pF, T Parameter Description V Supply voltage DD I Supply current DD V Supply turn-on slope DDS V Low input logic level IL V High input logic level HL ...

Page 10

... ORDERING INFORMATION PART QT113-D QT113-S QT113-IS QT113H-D QT113H-S QT113H-IS Chart 4-3 - Typical Response Time vs. Cx; Vdd = 3.0 100.00 10.00 1. Load TEMP RANGE PACKAGE 0 - 70C 0 - 70C -40 - 85C 0 - 70C 0 - 70C -40 - 85C - 10 - 10nF 20nF 50nF 100nF 200nF 500nF 30 40 MARKING PDIP QT1 + 13 SOIC-8 ...

Page 11

Package type: 8-pin Dual-In-Line Millimeters 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 Millimeters ...

Page 12

Quantum Research Group Ltd Enterprise House, Southampton, Hants SO14 3XB Tel: +44 (0)23 8045 3934 Fax: +44 (0)23 8045 3939 This device expressly not for use in any medical or human safety related application without the express written consent of ...

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