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부품번호 | IQS904 기능 |
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기능 | Single Channel Capacitive Sensor and Controller | ||
제조업체 | Azoteq | ||
로고 | |||
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IQS904 Datasheet
IQ Switch® - ProxSense® Series
Single Channel Capacitive Sensor and Controller for Dimmer Applications
Unparalleled Features
Extensive feature set in a TSOT23-6 package
Extremely low current consumption
Automatic tuning for optimal operation in various environments & compensation against
sensitivity reducing objects
The IQS904 ProxSense® IC is a fully integrated single channel capacitive contact and proximity
sensor with built in controller for dimming applications. With market leading sensitivity and
automatic tuning of the sense antenna, the IQS904 provides an extremely cost effective minimalist
implementation requiring very few external components. The device is ready for use in a large
range of AC/DC dimming applications, while programming options allow flexible fine tuning in
specialized applications.
Main Features
Single Channel input device
IQS904A : AC applications
IQS904D : DC applications
ATI: Automatic tuning to optimum sensitivity
Supply Voltage 3V to 5.5V
Internal voltage regulator and reference capacitor
OTP options
Output Polarity (Active High or Active Low) for IQS904AC
Proximity & Touch Thresholds
FITD time(18s or 5s) for IQS904DC
Automatic drift compensation
Development and Programming tools available (USBProg)
Compact TSOT23-6 Package
Applications
DC/AC Lamp Dimming
Camping Lights
Flash Lights
Night Lights
Under Cabinet Lighting
Proximity detection that enables backlighting activation
(Patented)
Replacement for electromechanical switches
TA TSOT23-6
-40°C to 85°C
IQS904
Current Consumption: 200 µA
4 Detailed Description
4.1 System overview
L LIVE
Power
Supply
Circuitry
VDDHI
ZC
IQS904
Cx
LOAD
GND
N Neutral
SENSE
Lamp
Switch
Figure 4.1 System overview
4.2 Typical Circuit for DC Applications
Connect tosense button
(See Appnote: AZD008for buttondesign
guidelines)
CX
470R
VIN VDDHI
GND
LOAD+ VDDHI
LOAD-
LOAD+ , LOAD-:
Connect toLoad
GND
1IQS901-SOT-23
VDDHI
2K
DS0
ZC/BACKLIGHT
ZC/BACKLIGHT:
Connect toLEDor to
MCU, toindicate
Proximity andTouch
detection.
ZC/BACKLIGHT
U1
6 CX
VDDHI
1 ZC/BACKLIGHT
3 LOAD
4 VREG GND
IQS904SOT-23-6
5
2
C4
1uF 100pF
GND
Optional: 100pFcapacitorsfor additional RF
immunity (C2andC4).
VDDHI
C2
100pF
1uF
GND
180k
GND GND
Figure 4.2 Reference Design (DC Application)
Copyright © Azoteq (Pty) Ltd 2010.
All Rights Reserved.
IQS904 Datasheet
Revision 1.06
Page 4 of 23
December 2011
4페이지 Figure 6.2 Dimming Level versus Proximity and Touch
Copyright © Azoteq (Pty) Ltd 2010.
All Rights Reserved.
IQS904 Datasheet
Revision 1.06
Page 7 of 23
December 2011
7페이지 | |||
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