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IQS232 Datasheet Preview

IQS232 Datasheet

Configurable 2 Channel sensor

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IQS232 pdf
IQ Switch®
ProxSense® Series
IQS232 Datasheet - Configurable 2 Channel sensor with
Compensation for Sensitivity Reducing Objects
Unparallelled Features:
J Sub 4 µA current consumption
J Automatic tuning for optimal operation in various environments & compensation against sensi-
tivity reducing objects
The IQS232 ProxSense® IC is a fully integrated two channel capacitive contact and proximity sensor
with market leading sensitivity and automatic tuning of the sense electrodes. The IQS232 provides
a minimalist implementation requiring as few as 2 external components. The device is ready for
use in a large range of applications while programming options allow customisation in specialised
applications.
Main features:
J 2 Channel input device
J Differentiated Touch and Distributed Proximity Electrode
J ATI: Automatic tuning to optimum sensitivity
J Supply Voltage1.8 V to 3.6 V
J Internal voltage regulator and reference capacitor
J OTP options available
J Direct (logic level) and serial data output
J Low Power Modes (sub 4 µA min)
J Adjustable Proximity & Touch Thresholds
J Automatic drift compensation
J Development and Programming tools available
J Small and cost effective SO-8 package
Applications:
J GUI trigger on proximity detection.
J White goods and appliances
J Remote Controls
J Office equipment, toys, sanitary ware
J Flame proof, hazardous environment Hu-
man Interface Devices
J Proximity detection that enables back light-
ing activation (Patented)
J Wake-up from standby applications
J Replacement for electro mechanical
switches
Copyright ©
IQS232 Prelimanary Datasheet V1.00
Azoteq
1of 33
Free Datasheet http://www.datasheet4u.com/



Azoteq
Azoteq

IQS232 Datasheet Preview

IQS232 Datasheet

Configurable 2 Channel sensor

No Preview Available !

IQS232 pdf
IQ Switch®
ProxSense® Series
Contents
List of Figures
3
List of Tables
3
Revision History
3
List of Symbols
4
1 Functional Overview
1.1 Pin Outs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
5
6
2 Analogue Functionality
6
3 Digital Functionality
6
4 Reference Design
4.1 Power Supply and PCB Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Design Rules for Harsh EMC Environments . . . . . . . . . . . . . . . . . . . . . . .
7
7
8
5 High Sensitivity
9
6 User Configurable Options
9
6.1 Configuring of Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 Description of User Options
15
7.1 ATI Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.2 Touch Base Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.3 Touch Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.4 Proximity Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.5 Halt time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.6 Proximity Base Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.7 Sensitivity Multipliers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.8 Base Multipliers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.9 Base Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.10 Charge Transfer Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.11 Streaming mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.12 Noise Detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.13 Low Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.14 Guard Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.15 Output Logic Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.16 ATI Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.17 ATI Target . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8 Charge Transfers
20
9 Auto Tuning Implementation
21
9.1 Full ATI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
9.2 Partial ATI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
10 Specifications
23
Copyright ©
Azoteq
IQS232 Prelimanary Datasheet V1.00
2of 33
Free Datasheet http://www.datasheet4u.com/


Part Number IQS232
Description Configurable 2 Channel sensor
Maker Azoteq
Total Page 30 Pages
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