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PDF IQS904 Data sheet ( Hoja de datos )
| Número de pieza | IQS904 | |
| Descripción | Single Channel Capacitive Sensor and Controller | |
| Fabricantes | Azoteq | |
| Logotipo |  |
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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
1 page  
4.3 Typical Circuit for AC Applications
1M 1M
LIVE
NEUTRAL
1 AC
2 AC
DF04S
+3
-4
GND
Connecttosense button
(See Appnote:AZD008 for button design
guidelines)
CX
1nF
2K
Optional: 100pFcapacitor for additional RF
immunity (C2)
ZC
100pF
Wide netsshouldbe routedaslowimpedance power distribution, with
2Acurrent carryingcapability.
LOAD+
GND
LOAD-
68k
K
REF
A
AZ431LAN
2
1
3
470k1%
154k1%
10uF 16V
68k
68k
68k
LOAD
100k
1 IQS902-FET-N-DPAK
GND GND
U1
6 CX
VDDHI
ZC 1 ZC/BACKLIGHT
LOAD 3 LOAD
4 VREG GND
IQS904SOT-23-6
1uF 100pF
5
2
10pF
GND
NFETVtn(Tresholdvoltage) should be lower than 4V. (< 4V) This
is toensure the FETfully turnson.
EARTH_IN
GND GND
Wide nets should be routedaslowimpedance power distribution, with 2Acurrentcarryingcapability.
EARTH_OUT
Figure 4.3 Reference Design (AC Application)
Copyright © Azoteq (Pty) Ltd 2010.
All Rights Reserved.
IQS904 Datasheet
Revision 1.06
Page 5 of 23
December 2011
5 Page 
7.3 IQS904DC User options
Table 6-4: User Selectable Configuration for IQS904DC Options: Bank 0
tHALT1
tHALT0
x
TTHR2
TTHR1
TTHR0
bit 7
Bank 0 bit 7-6 tHALT1:tHATL0: Halt time of Long Term Average
00 = 18 seconds
01 = 60 seconds
10 = Never Halt
11 = Always Halt
Bank 0: bit 5
Not Used
Bank 0: bit 4-2
TTHR2:TTHR0: Touch Thresholds on CH0
000 = 64
001 = 16 (Most Sensitive)
010 = 32
011 = 124
100 = 188
101 = 250
110 = 375
111 = 500 (Least Sensitive)
Bank 0: bit 1-0
PTHR1: PTHR0:Proximity Thresholds
00 = 4
01 = 2 (Most Sensitive)
10 = 8
11 = 16 (Least Sensitive)
PTHR1
PTHR0
bit 0
Copyright © Azoteq (Pty) Ltd 2010.
All Rights Reserved.
IQS904 Datasheet
Revision 1.06
Page 11 of 23
December 2011
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet IQS904.PDF ] | |
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