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MCP6XXX Amplifier

Evaluation Board 4

User’s Guide

Summary of content (30 pages)

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Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
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MCP6XXX AMPLIFIER EVALUATION BOARD 4 USER’S GUIDE Table of Contents Preface ........................................................................................................................... 1 Introduction............................................................................................................ 1 Document Layout .................................................................................................. 1 Conventions Used in this Guide .......................................
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MCP6XXX AMPLIFIER EVALUATION BOARD 4 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.
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MCP6XXX Amplifier Evaluation Board 4 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...
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Preface RECOMMENDED READING This user's guide describes how to use MCP6XXX Amplifier Evaluation Board 4. Other useful documents are listed below. The following Microchip documents are available and recommended as supplemental reference resources. MCP6021/2/3/4 Data Sheet, “Rail-to-Rail Input/Output, 10 MHz Op Amps” (DS21685) This data sheet provides detailed information regarding the MCP602X product family. THE MICROCHIP WEB SITE Microchip provides online support via our web site at www.microchip.com.
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MCP6XXX AMPLIFIER EVALUATION BOARD 4 USER’S GUIDE Chapter 1. Product Overview 1.1 INTRODUCTION The MCP6XXX Amplifier Evaluation Board 4 is described by the following: • Assembly # : 114-00154 • Order # : MCP6XXXEV-AMP4 • Name: MCP6XXX Amplifier Evaluation Board 4 Items discussed in this chapter include: • Section 1.2 “MCP6XXX Amplifier Evaluation Board 4 Kit Contents” • Section 1.3 “MCP6XXX Amplifier Evaluation Board 4 Description” 1.
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MCP6XXX Amplifier Evaluation Board 4 User’s Guide 1.3 MCP6XXX AMPLIFIER EVALUATION BOARD 4 DESCRIPTION MCP6XXX Amplifier Evaluation Board 4 is intended to support the inverting integrator circuit. The MCP6XXX Amplifier Evaluation Board 4 has the following features: • All amplifier resistors and capacitors are socketed • Supports all Microchip single op amps - PDIP-8 package (e.g., MCP6021) are socketed - SOIC-8 package can be accomodated; see Section 2.4.
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MCP6XXX AMPLIFIER EVALUATION BOARD 4 USER’S GUIDE Chapter 2. Installation and Operation 2.1 INTRODUCTION This chapter shows how to set up the MCP6XXX Amplifier Evaluation Board 4 and verify its operation. This chapter includes the following topics: • Required Tools • MCP6XXX Amplifier Evaluation Board 4 Set-Up • MCP6XXX Amplifier Evaluation Board 4 Operation 2.2 REQUIRED TOOLS • Lab power supply • Lab signal source (e.g., function generator) • Lab measurement equipment (e.g., oscilloscope) 2.
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MCP6XXX Amplifier Evaluation Board 4 User’s Guide The power supply voltage needs to be in the allowed range for the installed operational amplifiers. Any of Microchip’s op amps that operate below 5.5V can be used. Moreover, the power supply is protected by a zener diode with nominal voltage 6.2V and bypassed by a 1.0 µF capacitor. (See Figure 2-3: “Power Supply Block.”) The output load consists of a capacitor (CL) and two resistors (RL, RISO).
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Installation and Operation 2.3.1 Top Level Amplifier Circuit Diagrams 2.3.1.1 POWER SUPPLY BLOCK The power supply is protected by a zener diode and bypassed by a capacitor. Figure 2-3 shows the circuit diagram for the power supply. CP1 = 1.0 µF. VS Power Supply VDD CP1 DP1 Note: FIGURE 2-3: 2.3.1.2 DP1 is a zener diode with nominal voltage of 6.2V Power Supply Block. NON-INVERTING COMPARATOR Figure 2-4 shows the circuit diagram for the non-inverting comparator block.
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MCP6XXX Amplifier Evaluation Board 4 User’s Guide 2.3.2 Inverting Integrator • It integrates and inverts a voltage with an integrating frequency ω =1/R1C1 (rad/s). Additional components control output clipping (wind-up) and initialization of the integrating capacitor (C1). Refer to Figure 2-1. • Figure 2-5 shows the circuit diagram for the inverting integrator block. CU1 = 0.1 uF, R4= R5 = 100.0Ω, M1 is N-MOSFET, R3 = R1//R2 Note 1: Adding R2 to avoid the integrator output clipping at DC.
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Installation and Operation 2.4 MCP6XXX AMPLIFIER EVALUATION BOARD 4 OPERATION Items discussed in this section include: • Building the Amplifier • Testing the Amplifier • Amplifier Modification: Using 8-Pin SOIC Op Amps 2.4.1 Building the Amplifier This inverting integrator is described as follows: • • • • • • Power Supply VDD is 5.0V Load Capacitance CL is 56 pF Load Resistance RL is 1.6 kΩ R1= 8.06 kΩ, R2 is open, R3 = 8.06 kΩ, C1 = 1 μF, RISO = 0Ω Input Reference VREF = 0.
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MCP6XXX Amplifier Evaluation Board 4 User’s Guide The fully assembled MCP6XXX Amplifier Evaluation Board 4 top view is shown in Figure 2-7 (without any user selected components). FIGURE 2-7: Picture of the Inverting Integrator Supported by the MCP6XXX Amplifier Evaluation Board 4. DS51681A-page 12 © 2007 Microchip Technology Inc.
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Installation and Operation 2.4.2 Testing the Amplifier 2.4.2.1 CHECKING THE TEST POINTS The (surface mount) test points for power supply, ground, input signal and output signal allow lab equipment to be connected to the board. Figure 2-8 shows the test points to check. Test VREF Test VDD Test VL Test GND Test VINX Test VIN Test GND Test GND Test VSW FIGURE 2-8: 2.4.2.2 Checking the Test Points.
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MCP6XXX Amplifier Evaluation Board 4 User’s Guide 2.4.3 Amplifier Modifications Using 8-Pin SOIC Op Amps There are two options available when using single op amps in SOIC-8 packages (150 mil wide): • Soldering onto the MCP6XXX Amplifier Evaluation Board 4, or • Soldering it onto a separate board which is connected to the DIP-8 socket Note: The DIP-8 socket must be empty; only one op amp can be used at a time. Figure 2-10 shows a SOIC-8 op amp soldered onto the MCP6XXX Amplifier Evaluation Board 4.
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Installation and Operation (Front View) (Back View) FIGURE 2-11: Op Amp in SOIC-8 package soldered to a separate board. FIGURE 2-12: Board 4. Connecting Adaptor Board onto MCP6XXX Amplifier Evaluation © 2007 Microchip Technology Inc.
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MCP6XXX AMPLIFIER EVALUATION BOARD 4 USER’S GUIDE Appendix A. Schematic and Layouts A.1 INTRODUCTION This appendix contains the following schematics and layouts for the MCP6XXX Amplifier Evaluation Board 4: • • • • Board – Schematic Board – Top Silk and Metal Layers Board – Top Metal Layer Board – Bottom Metal Layer © 2007 Microchip Technology Inc.
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MCP6XXX Amplifier Evaluation Board 4 User’s Guide BOARD - SCHEMATIC S G D M A.2 1 3 DS51681A-page 18 © 2007 Microchip Technology Inc.
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MCP6XXX Amplifier Evaluation Board 4 User’s Guide A.4 BOARD - TOP METAL LAYER DS51681A-page 20 © 2007 Microchip Technology Inc.
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MCP6XXX AMPLIFIER EVALUATION BOARD 4 USER’S GUIDE Appendix B. Bill of Materials (BOM) B.1 MCP6XXX AMPLIFIER EVALUATION BOARD 4 BOM The Bill of Materials (BOM) in Table B-1 corresponds to Figure 2-1 and Figure 2-2. Unpopulated parts are in Table B-2. TABLE B-1: Qty BILL OF MATERIALS (102-00154R1) (NOTE 1) Reference Description Manufacturer CAP CERAMIC 1UF 10% 25V X5R 0805 Panasonic® Part Number 1 CP1 5 CC1, CC2, CAP CERAMIC .1UF 10% 25V X7R C3, CU1, CU2 0805 1 DP1 DIODE ZENER 6.
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MCP6XXX Amplifier Evaluation Board 4 User’s Guide TABLE B-2: Qty BILL OF MATERIALS – UNPOPULATED PARTS (102-00154R1) Reference Description Manufacturer 1 U1 7 R1-R3, C1, RISO, Not Populated when shipped to RL, CL customer Note 1: MCP6021 PDIP-8, Single Op Amp Part Number Microchip Technology Inc MCP6021-E/P — — The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM used in manufacturing uses all RoHS-compliant components.
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