LDS6003 [IDT]
PureTouch? Capacitance Touch IC; PureTouch ™电容触摸IC
| 型号： | LDS6003 |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | PureTouch? Capacitance Touch IC |
| 文件： | 总2页 (文件大小：284K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
semiconductor solutions
®
LDS6003
PureTouch™ Capacitance Touch IC
The LDS6003 PureTouch™ controller empowers system designers to create streamlined, attractive,
and reliable product designs, enabling the replacement of mechanical controls with capacitive touch
buttons, sliders, and scroll wheels.
Description
LDS6003 Features
The LDS6003 is a programmable capacitance-to-digital converter (CDC) designed for use with capacitive
sensor arrays implementing touch-based input controls including sliders, scroll wheels, and buttons.
Featuring 6 sensor inputs, the LDS6003 provides the flexibility to implement multiple touch inputs using
a single controller.
Versatile, accurate capacitance-
to-digital converter (CDC)
•ꢀ 500ꢀkHzꢀsigma-deltaꢀCDC
•ꢀ 6ꢀcapacitanceꢀsensorꢀinputꢀchannels
•ꢀ 2ꢀmsꢀupdateꢀrateꢀperꢀactiveꢀsensor
The capacitive sensor inputs are directed through an integrated switch matrix to a 500 kHz sigma-delta
CDC which senses changes in the external sensor array. When a sufficiently large change in capacitance
occurs, a sensor activation is registered and the host processor is notified.
Integrated, automatic
calibration algorithms
•ꢀ Environmentalꢀcompensation
On-chip calibration logic continuously monitors the environment and automatically adjusts on-and-off
threshold levels to prevent false sensor activation. The LDS6003 is offered with both SPI-compatible and
I2C-compatible interfaces (active interface selected by I/F select pin) and features a general-purpose input/
output (GPIO) and interrupt output for additional communication with the host processor.
•ꢀ On-chipꢀRAMꢀtoꢀstoreꢀcalibrationꢀdata
Integrated touch preference modes
•ꢀ Strongestꢀsingleꢀtouch
•ꢀ Strongestꢀtwoꢀtouches
®
•ꢀ Unrestrictedꢀ(all)ꢀtouches
C0
LDS6003
C1
C2
Ultra-low touch sensor
power consumption*
•ꢀ Operatingꢀmodeꢀ(typical):ꢀꢀ
<150 uW (VDD1=1.8V)
Power-On
Reset Logic
Calibration
Engine
Sigma-Delta
CDC
C3
C4
C5
•ꢀ Shutdownꢀmodeꢀ(typical):ꢀꢀ
VDD1
<1 uW (VDD1=1.8V)
Calibration
RAM
VSS1
RESETB
TEST
Flexible interface options
•ꢀ SPI-compatibleꢀserialꢀI/F
•ꢀ I2C-compatible serial I/F
Control and
Data Registers
•ꢀ SeparateꢀVDDIO level for serial interface
•ꢀ GPIOꢀandꢀInterruptꢀOutput
* ꢂxcludes I/F and voltage dependent VDDIO current
500 kHz
Excitation
Source
SHIELD
VDDIO
I/F SEL
Serial Interface and
Control Logic
Interrupt and GPIO Logic
SD0/ SDI/ SCLK/ CSB/
SCL
GPIO
INTB
SDA
A1
A1
Figure 1. LDS6003 block diagram
IDT® LDS6003 PꢀꢁꢂTOꢀCH™ CꢃPꢃCITꢃꢄCꢂ TOꢀCH IC
1
Ideal solution for portable applications
Flexible package options:
•ꢀ 28ꢀpinꢀ4mmꢀxꢀ4mmꢀQFN,ꢀ
0.8mm max height
The LDS6003 is optimized for minimal power consumption, with touch sensor circuits operating from a
1.8V supply voltage. In full power mode, sensor conversion and calibration occur continuously, minimizing
the time between touch event and touch detection. With its ultra-low touch sensor power consumption of
<150 uW (typical), the LDS6003 may be operated continuously in full power mode, even when battery life
is of premium importance. The low power architecture of the IDT PureTouch™ solutions eliminates the
need for introduced latency periods that can cause noticeable delays and degrade the user experience.
•ꢀ 28ꢀpinꢀ5.3mmꢀxꢀ10.2mmꢀSSOP,ꢀ
1.83mm max height
Power supply range:
•ꢀ Touchꢀsupplyꢀ(VDD1):ꢀ1.65Vꢀ-ꢀ1.95V
When touch inputs are not required to be active, the LDS6003 may be put into standby mode, reducing
typical power consumption below 1 uW.
•ꢀ VDDIO=1.65V - 3.6V
Applications:
VDDIO (1.65V~3.6V)
•ꢀ Mobileꢀhandsetsꢀandꢀsmartphones
SENSOR
PCB
•ꢀ Personalꢀmusicꢀandꢀmediaꢀplayersꢀ
(MP3/MP4)
LDS6003
Host Processor
with SPI
•ꢀ Gamingꢀdevices
VDDIO
I/F SEL
VDD
VSS
•ꢀ Remoteꢀcontrols
SHIELD
•ꢀ Television,ꢀaudio/video
•ꢀ Set-topꢀboxes
C0
C1
C2
C3
C4
C5
CSB
SCLK
SDI
SSB
SCLK
MOSI
MISO
•ꢀ Multi-functionꢀprinters
•ꢀ Enterpriseꢀtelephony
SDO
floating
INTB
RESETB
GPIO
INTB
RESETB
VDD1 (1.65V~1.95V)
floating
floating
VDD1
VSS1
TEST
C1
C1: > 1uF
Figure 2. LDS6003 application diagram
Discover what IDT know-how can do for you.
www.IDT.com/go/Touch
© 2009 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are registered trademarks of Integrated Device
Technology, Inc. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners.
®
Printed in USA 08-09/MG/BWD/PDF_r7_v1
FLYR-LDS6003-089
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