Datasheet > QT511-ISSG

QT511-ISSG

更新时间： 2024-11-13 00:04:23

品牌	Logo	应用领域
QT		/
页数	文件大小	规格书
12页	252K
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QT511-ISSG 数据手册

QT511-ISSG

QWHEEL™ TOUCH

SLIDER IC

Rotary finger-touch ‘wheel’ slider control

Center-button compatible signal processing

Extremely simple circuit - no external active components

SPI slave-mode interface

VDD

SDO

GND

DRDY

DETECT

SDI

Self-calibration and drift compensation

/SS

QT511

Spread-spectrum operation for optimal EMC compliance

2.5 - 5.5V single supply operation; very low power

Enhanced power supply & thermal drift rejection

14-pin TSSOP Pb-free package

Compatible with clear ITO over LCD construction

Inexpensive, simple 1-sided PCB construction possible

Reference design board available

SCLK

SNS3B

SNS3A

SNS2B

SNS1A

SNS1B

SNS2A

APPLICATIONS

y Personal electronics

y Appliance controls

y Shaft encoders

y Automotive controls

The QT511 QSlide™ IC is a new type of rotary capacitive touch ‘slider’ sensor IC based on Quantum’s patented

charge-transfer methods. This unique IC allows designers to create speed or volume controls, menu bars, and other more

exotic forms of human interface on the panel of an appliance. Generally it can be used to replace any form of rotary knob,

through a completely sealed panel.

The device uses a simple, inexpensive resistive sensing element between three connection points. The sense element can be

circular or any polygon shape.

The QT511 can report a single rapid touch anywhere along the sense element, or, it can track a finger moving along the wheel

surface in real time. The device self-calibrates under command from a host controller.

This device uses three channels of simultaneous sensing across a resistive element to determine finger position, using

mathematical analysis. A positional accuracy of 5% (or better) is relatively easy to achieve. The acquisitions are performed in a

burst mode which uses proprietary spread-spectrum modulation for superior noise immunity and low emissions.

The output of the QT511 can also be used to create discrete controls in a circle, by interpreting sets of number ranges as

buttons. For example, the number range 0..19 can be button A, 30..49 button B, 60..79 button C etc. Continuous wheel action

and discrete controls can be mixed on a single element, or, the element can be reinterpreted differently at different times, for

example when used below or on top of an LCD to act as a menu input device that dynamically changes function in context. The

device is compatible with ITO (Indium Tin Oxide) overlays on top of various displays or simply to provide for a backlighting

effect.

The QT511 has two enhancements over the QT510. It is significantly more stable with temperature and other environmental

influences, and it recognizes a touch in the middle of the wheel as being invalid, which aids considerably in placing a touch

button in the center of the wheel. However, unlike the QT510 the QT511 does not have a proximity detection function.

QT511-ISSG R6.01/1005

12 3 4 5 6 7...12

中文翻译

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