IQ Switch

®

ProxSense

Copyright © Azoteq (Pty) Ltd 2015

IQS227AS Datasheet

Page 2 of 31

All rights reserved

Revision 1.05

October 2015

Contents

IQS227AS DATASHEET ................................................................................................................................................ 1

1

OVERVIEW ......................................................................................................................................................... 4

2

ANALOGUE FUNCTIONALITY............................................................................................................................... 4

3

PACKAGING AND PIN-OUT ................................................................................................................................. 5

4

USER CONFIGURABLE OPTIONS.......................................................................................................................... 7

5

MEASURING CAPACITANCE USING THE CHARGE TRANSFER METHOD...............................................................10

6

DESCRIPTIONS OF USER OPTIONS .....................................................................................................................10

7

DATA STREAMING MODE ..................................................................................................................................15

8

AUTO TUNING IMPLEMENTATION (ATI) ............................................................................................................17

9

ELECTRICAL SPECIFICATIONS .............................................................................................................................20

10

DATASHEET AND PART-NUMBER INFORMATION ..............................................................................................24

11

REVISION HISTORY ............................................................................................................................................27

APPENDIX A.

MEMORY MAP .................................................................................................................................28

APPENDIX B.

CONTACT INFORMATION..................................................................................................................31