MCP355X Tiny Application Sensor Demo Board User’s Guide © 2006 Microchip Technology Inc.
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MCP355X TINY APPLICATION SENSOR DEMO BOARD USER’S GUIDE Table of Contents Preface ........................................................................................................................... 1 Introduction............................................................................................................ 1 Document Layout .................................................................................................. 1 Conventions Used in this Guide .................................
MCP355X Tiny Application Sensor Demo Board User’s Guide NOTES: DS51598A-page iv © 2006 Microchip Technology Inc.
MCP355X TINY APPLICATION SENSOR DEMO BOARD USER’S GUIDE Preface NOTICE TO CUSTOMERS All documentation becomes dated, and this manual is no exception. Microchip tools and documentation are constantly evolving to meet customer needs, so some actual dialogs and/or tool descriptions may differ from those in this document. Please refer to our web site (www.microchip.com) to obtain the latest documentation available. Documents are identified with a “DS” number.
MCP355X Tiny Application Sensor Demo Board User’s Guide CONVENTIONS USED IN THIS GUIDE This manual uses the following documentation conventions: DOCUMENTATION CONVENTIONS Description Arial font: Italic characters Initial caps Quotes Underlined, italic text with right angle bracket Bold characters N‘Rnnnn Text in angle brackets < > Courier New font: Plain Courier New Represents Examples Referenced books Emphasized text A window A dialog A menu selection A field name in a window or dialog A menu path MP
Preface THE MICROCHIP WEB SITE Microchip provides online support via our web site at www.microchip.com. This web site is used as a means to make files and information easily available to customers.
MCP355X Tiny Application Sensor Demo Board User’s Guide NOTES: DS51598A-page 4 © 2006 Microchip Technology Inc.
MCP355X TINY APPLICATION SENSOR DEMO BOARD USER’S GUIDE Chapter 1. Product Overview 1.1 INTRODUCTION This chapter provides an overview of the MCP355X Tiny Application Sensor Demo Board and covers the following topics: • What is the MCP355X Tiny Application Sensor Demo Board? • What the MCP355X Tiny Application Sensor Demo Board kit includes 1.2 WHAT IS THE MCP355X TINY APPLICATION SENSOR DEMO BOARD? The MCP3550/1/3 devices are 2.7V to 5.
MCP355X Tiny Application Sensor Demo Board User’s Guide NOTES: DS51598A-page 6 © 2006 Microchip Technology Inc.
MCP355X TINY APPLICATION SENSOR DEMO BOARD USER’S GUIDE Chapter 2. Installation and Operation 2.1 INTRODUCTION 350Ω 350Ω 350Ω 350Ω Input Filtering The MCP355X Tiny Application Sensor Demo Board is designed to demonstrate the performance of the MCP3550/1/3 devices in a simple low-cost application. The circuit uses a ratiometric sensor configuration and uses the system power supply as the voltage reference.
MCP355X Tiny Application Sensor Demo Board User’s Guide USB Power (Digital) Power Supply Filtering USB Connector JP1 USB Power & Data Digital Ground Analog Ground Plane PIC18F4550 U2 Plane Filter Network Analog Power & Reference U3 SM5420 FIGURE 2-2: 2.3 MCP3551 U4 Block Diagram. FUNCTIONAL BLOCK DESCRIPTIONS 2.3.1 SM5420 The SM5420 device is an absolute pressure sensor in a surface mount SOIC package. The device is a piezo resistive silicon device available from Silicon Microstructure.
Installation and Operation Attenuation (dB) : 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 0 10 20 30 40 50 60 70 80 90 100 110 Frequency (Hz) FIGURE 2-3: SINC filter response, MCP3551 device, simultaneous 50/60 Hz Normal Mode Rejection. 2.3.3 PIC18F4550 The high speed USB PICmicro® microcontroller is used to connect to the PC and quickly evaluate system performance. An In-Circuit Serial Programming™ (ICSP™) connector is also included. 2.3.
MCP355X Tiny Application Sensor Demo Board User’s Guide 2σ σ FIGURE 2-4: Two Normal or Gaussian Output Distributions. The DataView software tool is a visualization tool, showing real-time histograms using the MCP3551. The software also calculates the RMS noise of the current distribution. The number of samples in the distribution is also scalable, allowing post averaging experiments. FIGURE 2-5: DataView showing system performance in a histogram format.
MCP355X TINY APPLICATION SENSOR DEMO BOARD USER’S Appendix A. Schematic and Layouts A.1 INTRODUCTION This appendix contains the following schematics and layouts for the MCP355X Tiny Application Sensor Demo Board User’s Guide: • Board Schematic • Board - Top Layer • Board - Bottom Layer A.2 SCHEMATICS AND PCB LAYOUT Figure A.3 “Board - Schematic” shows the MCP355X Tiny Application Sensor Demo Board schematic, while Figure A.4 “Board Layout - Top Layer” and Figure A.
MCP355X Tiny Application Sensor Demo Board User’s Guide BOARD - SCHEMATIC M A.3 DS51598A-page 12 © 2006 Microchip Technology Inc.
Schematic and Layouts BOARD LAYOUT - TOP LAYER BOARD EDGE A.4 © 2006 Microchip Technology Inc.
MCP355X Tiny Application Sensor Demo Board User’s Guide A.5 BOARD LAYOUT - BOTTOM LAYER DS51598A-page 14 © 2006 Microchip Technology Inc.
MCP355X TINY APPLICATION SENSOR DEMO BOARD USER’S GUIDE Appendix B. Bill Of Materials (BOM) TABLE B-1: Qty BILL OF MATERIALS (BOM) Reference Description Manufacturer Part Number 1 C1 CAP .47UF 16V CERAMIC X7R 0805 Panasonic® 1 C2 CAP 1.0UF 10V CERAMIC X7R 0805 Kemet® Electronics C0805C105K8RACTU 3 C3, C9, C10 CAP .1UF 25V CERAMIC X7R 0805 Panasonic - ECG ECJ-2VB1E104K 2 C4, C6 CAP 22PF 50V CERM CHIP 0805 SMD Panasonic - ECG ECJ-2VC1H220J 1 C5 CAP .
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