User manual

ACTIVE FILTER DEMO BOARD KIT
USER’S GUIDE
© 2006 Microchip Technology Inc. DS51614A-page iii
Table of Contents
Preface ........................................................................................................................... 1
Introduction............................................................................................................ 1
Document Layout .................................................................................................. 1
Conventions Used in this Guide ............................................................................ 2
Recommended Reading........................................................................................ 3
The Microchip Web Site ........................................................................................ 3
Customer Support ................................................................................................. 3
Document Revision History ................................................................................... 3
Chapter 1. Product Overview ....................................................................................... 5
1.1 Introduction ..................................................................................................... 5
1.2 Kit Contents .................................................................................................... 5
1.3 Intended Use of the Active Filter Demo Board Kit .......................................... 6
1.4 Active Filter Demo Board Kit Description ....................................................... 6
1.5 Sub-assemblies .............................................................................................. 6
1.6 Associated Tools ............................................................................................ 8
Chapter 2. Setup and Installation ................................................................................ 9
2.1 Introduction ..................................................................................................... 9
2.2 Required Tools ............................................................................................... 9
2.3 Connecting the PCBs ..................................................................................... 9
2.4 V
DD
/2 Filter Section Set-up .......................................................................... 10
2.5 Active Filter Section Set-up .......................................................................... 11
2.6 Set-up Verification ........................................................................................ 17
Chapter 3. Building the Filter Supplied in the Kit .................................................... 19
3.1 Introduction ................................................................................................... 19
3.2 The Filter Design .......................................................................................... 19
3.3 Putting the Filter Together ............................................................................ 20
3.4 Testing the Filter ........................................................................................... 21
Chapter 4. Common Filter Modifications .................................................................. 25
4.1 Introduction ................................................................................................... 25
4.2 Power Supplies ............................................................................................ 25
4.3 Filter Section Ordering for Noise and Headroom ......................................... 27
4.4 Combining Low-pass and High-pass Sections ............................................. 27
4.5 Higher Frequency Filters .............................................................................. 27
4.6 Using 8-Pin SOIC Op Amps ......................................................................... 28