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IQS128 Datasheet(PDF) 5 Page - List of Unclassifed Manufacturers

Part # IQS128
Description  Single Channel Capacitive Proximity, Touch Controller
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Manufacturer  ETC2 [List of Unclassifed Manufacturers]
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IQS128 Datasheet(HTML) 5 Page - List of Unclassifed Manufacturers

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IQ Switch® ProxSense® Series
Copyright © Azoteq (Pty) Ltd 2011
IQS128 & IQS128LP Datasheet v2.4
Page 5 of 33
All Rights Reserved
November 2012
2 Pin-Out
The IQS128 is available in a TSOT23-6 package and the IQS128L is available in a DFN8(2x3)
package.
2.1
IQS128
2.1.1 Pin-out
Figure 2.1 Pin-out of IQS128 package
Table 2.1 Pin-out description
IQS128
Pin
Name
Type
Function
1
OUT
Digital Out
Output
2
VSS
Ground
GND Reference
3
CTRL / ND
Digital Input/Output
Control input or proximity output / ND pin
4
VREG
Analogue Output
Internal Regulator Pin (Connect 1µF bypass capacitor)
5
VDDHI
Supply Input
Supply Voltage Input
6
CX
Analogue
Sense Electrode
2.1.2 Schematic
Figure 2.2 Typical application schematic of
IQS128
2.1.3
Typical values
Component
Value
CVREG
1uF
RCX
470 Ω (typical)
RPU*
4.7 kΩ (typical)
CVDDHI
1uF
* RPU is only needed if device is setup
in active Low state.
VDDHI
CX
VSS
VDDHI
VREG
VREG
OUT
OUT
CTRL/ND
VSS
CX
CTRL / ND
VDDHI
1
VDDHI
2
CVDDHI
3
CVREG
6
Note: A 100pF capacitor can be places in parallel with
the existing capacitors between VDDHI and GND as
well as between VREG and GND for added RF
immunity.
5
GND
4
GND
IQS128
RCX
RPU
Sense
Electrode
CTRL
Input/Output
Output


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