MCP661 Line Driver Demo Board User’s Guide © 2009 Microchip Technology Inc.
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MCP661 LINE DRIVER DEMO BOARD USER’S GUIDE Table of Contents Preface ........................................................................................................................... 1 Introduction............................................................................................................ 1 Document Layout .................................................................................................. 1 Conventions Used in this Guide ..............................................
MCP661 Line Driver Demo Board User’s Guide NOTES: DS51868A-page 4 © 2009 Microchip Technology Inc.
MCP661 LINE DRIVER 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.
MCP661 Line Driver Demo Board User’s Guide CONVENTIONS USED IN THIS GUIDE This manual uses the following documentation conventions: DOCUMENTATION CONVENTIONS Description Arial font: Italic characters Represents Referenced books Emphasized text A window A dialog A menu selection A field name in a window or dialog A menu path MPLAB® IDE User’s Guide ...is the only compiler...
Preface RECOMMENDED READING This user's guide describes how to use MCP661 Line Driver Demo Board. Other useful documents are listed below. The following Microchip documents are available and recommended as supplemental reference resources. MCP661/2/3/5 Data Sheet, “60 MHz, 6 mA Op Amps”, (DS22194) Gives detailed information on the op amp family that is used as the DUT on the MCP661 Line Driver Demo Board. THE MICROCHIP WEB SITE Microchip provides online support via our web site at www.microchip.com.
MCP661 Line Driver Demo Board User’s Guide NOTES: DS51868A-page 8 © 2009 Microchip Technology Inc.
MCP661 LINE DRIVER DEMO BOARD USER’S GUIDE Chapter 1. Product Overview 1.1 INTRODUCTION The MCP661 Line Driver Demo Board is described by the following: • Assembly # : 114-00270-R1 • Order # : MCP661DM-LD • Name: MCP661 Line Driver Demo Board Items discussed in this chapter include: • Kit Contents • Intended Use • Description 1.2 KIT CONTENTS • Assembled printed circuit board, 102-00270 • Important Information “Read First” FIGURE 1-1: © 2009 Microchip Technology Inc.
MCP661 Line Driver Demo Board User’s Guide 1.3 INTENDED USE The MCP661 Line Driver Demo Board shows the MCP661 used in a very basic application for high speed op amps; a 50Ω line (coax) driver. It gives: • A 30 MHz solution • High speed PCB layout techniques • A means to test AC response, step response and distortion The application circuit implemented on this PCB is discussed briefly in the MCP661/2/3/5 data sheet’s application circuit section. 1.4 DESCRIPTION 1.4.
Product Overview 1.4.2 Power Supply Figure 1-3 shows the power supply circuitry. R1 and R2 provide high frequency isolation of the supply lines. They also help with series resonances in the supplies. C1 and C2 provide the bulk bypassing, while C3 and C4 provide the local bypassing, for U1 (MCP661). VDDX (+2.5V) C3 100 nF R1 1.0Ω C1 10 µF GND (0V) VSSX (-2.5V) FIGURE 1-3: 1.4.3 U1 MCP661 C2 10 µF R2 1.0Ω C4 100 nF Power Supply.
MCP661 Line Driver Demo Board User’s Guide NOTES: DS51868A-page 12 © 2009 Microchip Technology Inc.
MCP661 LINE DRIVER DEMO BOARD USER’S GUIDE Chapter 2. Installation and Operation 2.1 INTRODUCTION This chapter shows how to set up and operate the MCP661 Line Driver Demo Board. Items discussed in this chapter include: • Required Tools • Configuring the Lab Equipment and PCB 2.2 REQUIRED TOOLS • Lab Power Supply with dual outputs (one tracks the other): - For +2.5V, 0V and -2.
MCP661 Line Driver Demo Board User’s Guide 2.3 CONFIGURING THE LAB EQUIPMENT AND PCB Lab equipment is connected to this board as shown in Figure 2-1. The BNC recepticles and (surface mount) test points allow lab equipment to be connected to these boards. 1 2 3 FIGURE 2-1: Lab Equipment Connections. The arrows and numbers in the drawing signify the following: 1. BNC Recepticle for VIN. 2. BNC Recepticle for VOUT. 3. ±2.5V Power Supplies, with GND, for U1 (MCP661). a) VDDX = +2.5V. b) GND = 0V.
MCP661 LINE DRIVER DEMO BOARD USER’S GUIDE Appendix A. Schematics and Layouts A.1 INTRODUCTION This appendix contains the schematic and layouts for the MCP661 Line Driver Demo Board. • • • • • Board – Schematic Board – Top Silk Screen, Top Solder Mask and Top Metal Board – Top Silk Screen and Top Solder Mask Board – Bottom Metal (Top View) Board – Bottom Metal (Bottom View) The Gerber files for this board are available on the Microchip website (www.microchip.
MCP661 Line Driver Demo Board User’s Guide BOARD – SCHEMATIC M A.2 DS51868A-page 16 © 2009 Microchip Technology Inc.
Schematics and Layouts A.3 BOARD – TOP SILK SCREEN, TOP SOLDER MASK AND TOP METAL A.4 BOARD – TOP SILK SCREEN AND TOP SOLDER MASK © 2009 Microchip Technology Inc.
MCP661 Line Driver Demo Board User’s Guide A.5 BOARD – BOTTOM METAL LAYER (TOP VIEW) A.6 BOARD – BOTTOM METAL LAYER (BOTTOM VIEW) DS51868A-page 18 © 2009 Microchip Technology Inc.
MCP661 LINE DRIVER DEMO BOARD USER’S GUIDE Appendix B. Bill Of Materials (BOM) B.1 MCP661 LINE DRIVER DEMO BOARD BOM The BOM in Table B-1 shows all of the components assembled on the PCB. Table B-2 shows alternate components that can be placed on this PCB (after modification). TABLE B-1: BILL OF MATERIALS FOR ASSEMBLED PCB Reference Designator Qty.
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