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INTRODUCTION
This chapter contains general information that will be useful to know before using the
MCP6XXX Amplifier Evaluation Board 4. Items discussed in this chapter include:
• Document Layout
• Conventions Used in this Guide
• Recommended Reading
• The Microchip Web Site
• Customer Support
• Document Revision History
DOCUMENT LAYOUT
This document describes how to use the MCP6XXX Amplifier Evaluation Board 4. The
manual layout is as follows:
• Chapter 1. “Product Overview” - Provides the important information about the
MCP6XXX Amplifier Evaluation Board 4.
• Chapter 2. “Installation and Operation” – Covers the installation and operation
of the MCP6XXX Amplifier Evaluation Board 4. It lists the required tools, shows
how to set up the board, and demonstrates how to verify the amplifier operation.
• Appendix A. “Schematic and Layouts” – Shows the schematic and board
layouts for the MCP6XXX Amplifier Evaluation Board 4.
• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the
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. This web
site is used as a means to make files and information easily available to customers.
Accessible by using your favorite Internet browser, the web site contains the following
information:
• Product Support – Data sheets and errata, application notes and sample
programs, design resources, user’s guides and hardware support documents,
latest software releases and archived software
• General Technical Support – Frequently Asked Questions (FAQs), technical
support requests, online discussion groups, Microchip consultant program
member listing
• Business of Microchip – Product selector and ordering guides, latest Microchip
press releases, listing of seminars and events, listings of Microchip sales offices,
distributors and factory representatives
Preface
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels:
• Distributor or Representative
• Local Sales Office
• Field Application Engineer (FAE)
• Technical Support
• Development Systems Information Line
Customers should contact their distributor, representative or field application engineer
for support. Local sales offices are also available to help customers. A listing of sales
offices and locations is included in the back of this document.
Technical support is available through the web site at: http://support.microchip.com
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 2.4.3 “Amplifier
Modifications Using 8-Pin SOIC Op Amps”
• Test points for connecting lab equipment
• Single supply configuration
Figure 1-2 shows the block diagram of the MCP6XXX Amplifier Evaluation Board 4.
Lab equipment can be attached (via test points) to measure the amplifier response.
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
2.2REQUIRED TOOLS
• Lab power supply
• Lab signal source (e.g., function generator)
• Lab measurement equipment (e.g., oscilloscope)
2.3MCP6XXX AMPLIFIER EVALUATION BOARD 4 SET-UP
The MCP6XXX Amplifier Evaluation Board 4 is designed to demonstrate an inverting
integrator using one op amp and supporting circuitry. This section details the conversion of the topology to the MCP6XXX Amplifier Evaluation Board 4. Figure 2-1 shows
the circuit diagram for the board.
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 (C
to stabilize the amplifier when it drives a large capacitive load. R
(0Ω) when C
is small.
L
The non-inverting comparator provides two trip points which are at 0.8V
(See Section Figure 2-4: “Non-Inverting Comparator Block.”)
The resistors that are part of an amplifier are placed in pin sockets which are labeled.
The op amps are bypassed by 0.1 µF capacitors and the single op amp U1 can have
either a PDIP-8 or SOIC-8 package.
• PDIP-8 packages are inserted into the DIP-8 socket to the right of the U1 label.
• SOIC-8 packages can be accommodated; see Section 2.4.3 “Amplifier Modifications Using 8-Pin SOIC Op Amps”.
The (surface mount) test points for power supply, ground, input signal and output signal
allow lab equipment to be connected to the board. The MCP6XXX Amplifier Evaluation
Board 4 top view is shown in Figure 2-2.
) and two resistors (RL, R
L
). R
ISO
is a short circuit
ISO
ISO
and 0.2VDD.
DD
is used
FIGURE 2-2:MCP6XXX Amplifier Evaluation Board 4 Top View.
• 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 (C
• Figure 2-5 shows the circuit diagram for the inverting integrator block.
C
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.
FIGURE 2-8:Checking the Test Points.
2.4.2.2INVERTING INTEGRATOR RESPONSE
The MCP6021 op amp, 1% resistors, and 5% capacitors were used to build an inverting
integrator circuit. The measured response with feedback control strategy is shown in
Figure 2-9.
Figure 2-11 shows a SOIC-8 op amp and a DIP-8 socket, soldered onto the 8-Pin
SOIC/MSOP/TSSOP/DIP Evaluation Board available from Microchip Technology Inc.
(order # SOIC8EV). The two interconnect strips on the bottom are Samtec part #
BBS-14-T-B or equivalent and are soldered into the through holes for the DIP-8 socket.
Figure 2-12 shows this board plugged into the MCP6XXX Amplifier Evaluation Board
4.
Note:Insert the interconnect strips into the DIP-8 socket on the MCP6XXX Ampli-
fier Evaluation Board 4. Place the SOIC8EV board on the top of the interconnect strips with the same pin orientation. Now solder the strips to the top
board; this procedure ensures correct alignment of the strips. Clip the pins
flush with the top surface of the SOIC8EV board, then solder the SOIC-8
op amp on the top.
TABLE B-2:BILL OF MATERIALS – UNPOPULATED PARTS (102-00154R1)
Qty
ReferenceDescriptionManufacturerPart Number
1U1MCP6021 PDIP-8, Single Op
Amp
7R1-R3, C1, RISO,
RL, CL
Note 1: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.
Not Populated when shipped to
customer
Microchip
Technology Inc
——
MCP6021-E/P
The BOM in Table B-3 corresponds to the collection of resistors, capacitorys, jumpers
and MCP6021 op amps that come in the Accessory Bag which is shipped in the
MCP6XXX Amplifier Evaluation Board 4 Kit. These components are placed in an
separate ESD bag. They support the circuit in Section 2.4.1 “Building the Amplifier”.
Customers need to provide the resistors and capacitors for more amplifier circuits.
TABLE B-3:BILL OF MATERIALS – ACCESSORY BAG PARTS (102-00148R1)
QtyReferenceDescriptionManufacturerPart Number
1Accessory BagCAP CER 56PF 50V C0G
RADIAL
1Accessory BagCAP CER 1UF 25V X7R RADTDK
1Accessory BagJUMPER ZERO OHM 1/8WYageo® CorporationZOR-12-B-52
2Accessory BagRES 8.06K OHM 1/4W 1%
METAL FILM
1Accessory BagRES 1.58K OHM 1/4W 1%
METAL FILM
Note 1: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.