￥ 5.177

AT42QT1012-TSHR 数据手册 - ATMEL（爱特美尔）

制造商:

ATMEL（爱特美尔）

分类:

电容式触摸传感器

封装:

SOT-23-6

描述:

ATMEL AT42QT1012-TSHR 电容式触摸传感器, 一通道, 1.8 V, 5.5 V, SOT-23, 6 引脚, -40 °C

Pictures:

3D模型

符号图

焊盘图

引脚图

产品图

查看文档

AT42QT1012-TSHR数据手册

Page:

of 1 Go

PDF下载

若手册格式错乱，请下载阅览PDF原文件

Using the EVK1012A:

This kit is designed for the evaluation and development of applications using the

AT42QT1012-TSHR ('QT1012') Integrated Circuit (IC).

Default/shipped setting: User-set Auto-Off Delay set to infinite (J2 Pin1&2 connected by link),

Active High Output.

Please visit http://www.atmel.com/singletouch for details of this (and similar) products,

which includes links to relevant product datasheets.

• Insert the battery provided into the battery holder on the EVK1012A board.

Ensure that the battery has the correct orientation (negative (-) side to board)

or the EVK1012A will not work.

• Touch KEY and the LED will light. Release Touch.

• Touch KEY and the LED will switch off.

If a non-infinite Auto-Off Delay is set and reached (actual time is dependent on Voltage level,

Rt and Ct tolerances), the LED will switch off.

The LED will light when KEY is touched if the QT1012 is set to Active High Output.

If QT1012 is changed to give Active Low Output, then the LED will light until KEY touched.

An external power supply can be used instead of a battery.

WARNING: if an external power supply is used then the battery MUST be removed.

Schematic:

Configuring the EVK1012A:

The Auto-Off Delay (stated times ~+/10%) and Output Polarity can be set using the table below:

(Remove and refit the battery/power supply when changing Jumper position)

Jumper Position

(Pins 1-2)

Auto-Off Delay

J1 *

60 Minutes 60 Minutes 24 Hours 24 Hours

J2 *

Infinite 15 Minutes Infinite 6 Hours

User (Rt,Ct) User (Rt,Ct) User (Rt,Ct) User (Rt,Ct)

J4 *

15 Minutes Infinite 6 Hours Infinite

Multiplier: (LK1) x1: (VSS) x1: (VSS) x24: (VDD) x24: (VDD)

Output: (LK2)

Active High:

(VSS)

Active Low:

(VDD)

Active High:

(VSS)

Active Low:

(VDD)

* Remove Rt when Jumper is in J1, J2 or J4 positions.

A User electrode can be connected to the QT1012 using EXT and GND pads: The value of Cs may

require changing. (Large pads either side of Cs are available for fitting leaded capacitors in parallel).

The EVK1012A can also connect to a User output (using OUT and GND pads).

The Auto-Off Delay can be extended or the QT1012 output can be switched off immediately by

pulsing the voltage on the delay multiplier resistor RM through J5.

(Refer to QT1012 Datasheet for further details)

EVK1012A Kit Contents:

1x EVK1012A Evaluation Board

1x CR2032 Battery, 3V, 235mAh

2x AT42QT1012-TSHR ICs

1x EVK1012A User Guide

Rt (10kΩ, 51kΩ, 150kΩ)

& Ct (22nF, 47nF) components

Packed by: Dated:

User-Programmed Auto-Off Delay:

By changing the values of Rt and Ct, the Auto-Off Delay can be changed. Possible Rt and Ct

combinations are available using the formula:

Rt * Ct = (Delay * k) / 15,

where Rt is in kOhm and Ct is in nF and k is constant for a stated voltage and output.

For 3V active high output, k = 22.1. For 3V active low output, k = 19.25

(Refer to QT1012 Datasheet for further details)

NOTE: (Rt * Ct) / k must be between 4 to 240 for reliable operation.

Possible Rt and Ct Auto-Off Delay options at 3V are shown below:

(The values highlighted on the charts can be achieved using supplied kit components)

Touch Technology Division

1 Mitchell Point

Ensign Way, Hamble

Southampton SO31 4RF

United Kingdom www.atmel.com

Tel: +44 (0)844 894 1920 touch@atmel.com

Fax:+44 (0)23 8045 3939 REV 100.0710

trademarks, QT™, QTouch™ and others are trademarks of Atmel Corporation or its subsidiaries.

Other terms and product names may be registered trademarks or trademarks of others.

3V Active High

500

1000

1500

2000

2500

3000

3500

4000

0 50 100 150 200 250

Timing Re sistor Rt (K ohms)

Auto Off Delay (seconds)

22nF

47nF

3V Active Low

500