MCP6XXX Amplifier
Evaluation Board 2
User’s Guide
© 2007 Microchip Technology Inc. DS51668A
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DS51668A-page ii © 2007 Microchip Technology Inc.
MCP6XXX AMPLIFIER EVALUATION
BOARD 2 USER ’S GUIDE
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 MCP6XXX Amplifier Evaluation Board 2 Kit Contents ...................................5
1.3 Microchip’s Web-Based Mindi™ Analog Simulator Tool ................................6
1.4 MCP6XXX Amplifier Evaluation Board 2 Description ..................................... 6
Chapter 2. Installation and Operation .........................................................................7
2.1 Introduction .....................................................................................................7
2.2 Required Tools ...............................................................................................7
2.3 MCP6XXX Amplifier Evaluation Board 2 Set-up ............................................7
2.4 MCP6XXX Amplifier Evaluation Board 2 Operation ..................................... 13
Appendix A. Schematic and Layouts ........................................................................23
A.1 Introduction ..................................................................................................23
A.2 Board - Schematic .......................................................................................24
A.3 Board - Top Silk Layer ..............................................................................25
A.4 Board - Top Metal Layer .............................................................................. 26
A.5 Board - Bottom Metal Layer .........................................................................27
Appendix B. Bill of Materials (BOM) ..........................................................................29
B.1 MCP6XXX Amplifier Evaluation Board 2 BOM ............................................ 29
Worldwide Sales and Service ....................................................................................32
© 2007 Microchip Technology Inc. DS51668A-page iii
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
NOTES:
DS51668A-page iv © 2007 Microchip Technology Inc.
MCP6XXX AMPLIFIER EVALUATION
BOARD 2 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. This number is located on the bottom of each
page, in front of the page number. The numbering convention for the DS number is
“DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the
document.
For the most up-to-date information on development tools, see the MPLAB
Select the Help menu, and then Topics to open a list of available on-line help files.
®
IDE on-line help.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
MCP6XXX Amplifier Evaluation Board 2. 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 2. The
manual layout is as follows:
• Chapter 1. “Product Overview” - Provides the important information about the
MCP6XXX Amplifier Evaluation Board 2.
• Chapter 2. “Installation and Operation” – Covers the installation and operatio n
of the MCP6XXX Amplifier Evaluation Board 2. 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 2.
• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the
MCP6XXX Amplifier Evaluation Board 2.
© 2007 Microchip Technology Inc. DS51668A-page 1
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
Description Represents Examples
Arial font:
Italic characters Referenced books MPLAB® IDE User’s Guide
Emphasized text ...is the only compiler...
Initial caps A window the Output window
A dialog the Settings dialog
A menu selection select Enable Programmer
Quotes A field name in a window or
dialog
Underlined, italic text with
right angle bracket
Bold characters A dialog button Click OK
N‘Rnnnn A number in verilog format,
Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>
Courier New font:
Plain Courier New Sample source code #define START
Italic Courier New A variable argument file.o, where file can be
Square brackets [ ] Optional arguments mcc18 [options] file
Curly brackets and pipe
character: { | }
Ellipses... Replaces repeated text var_name [,
A menu path File>Save
A tab Click the Power tab
where N is the total number of
digits, R is the radix and n is a
digit.
Filenames autoexec.bat
File paths c:\mcc18\h
Keywords _asm, _endasm, static
Command-line options -Opa+, -Opa-
Bit values 0, 1
Constants 0xFF, ‘A’
Choice of mutually exclusive
arguments; an OR selection
Represents code supplied by
user
“Save project before build”
4‘b0010, 2‘hF1
any valid filename
[options]
errorlevel {0|1}
var_name...]
void main (void)
{ ...
}
DS51668A-page 2 © 2007 Microchip Technology Inc.
RECOMMENDED READING
This user's guide describes how to use MCP6XXX Amplifier Evaluation Board 2. 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
DOCUMENT REVISION HISTORY
Revision A (July 2007)
• Initial Release of this Document.
© 2007 Microchip Technology Inc. DS51668A-page 3
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
NOTES:
DS51668A-page 4 © 2007 Microchip Technology Inc.
MCP6XXX AMPLIFIER EVALUATION
BOARD 2 USER ’S GUIDE
Chapter 1. Product Overview
1.1 INTRODUCTION
The MCP6XXX Amplifier Evaluation Board 2 is described by the following:
• Assembly # : 114-00148
• Order # : MCP6XXXEV-AMP2
• Name: MCP6XXX Amplifier Evaluation Board 2
Items discussed in this chapter include:
• Section 1.2 “MCP6XXX Amplifier Evaluation Board 2 Kit Contents”
• Section 1.3 “Microchip’s Web-Based Mindi™ Analog Simula tor Tool”
• Section 1.4 “MCP6XXX Amplifier Evaluation Board 2 Description”
1.2 MCP6XXX AMPLIFIER EVALUATION BOARD 2 KIT CONTENTS
• MCP6XXX Amplifier Evaluation Board 2 - One partially assembled board
• Important Information “Read First”
• Accessory Bag - Contains loose parts for populating sockets on board
• Analog and Interface Products Demonstration Boards CD-ROM (DS21912)
- MCP6XXX Amplifier Evaluation Board 2 User’s Guide (DS51668)
FIGURE 1-1: MCP6XXX Amplifier Evaluation Board 2 Kit.
© 2007 Microchip Technology Inc. DS51668A-page 5
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
Amplifier Circuit
(Op Amp, Resistors,
Signal Output
and Test Point
Signal Inputs
and
Mid-Supply Ref
and
Power Supply
and Test Point
Test Points
Test Point
Capacitors and Jumpers)
1.3 MICROCHIP’S WEB-BASED MINDI™ ANALOG SIMULATOR TOOL
The Mindi™ Analog Simulator tool is an innovative software tool that simplifies analog
circuit design. The Mindi™ Analog Simulator tool supports the following application
circuits: 1) Active Filters, 2) Amplifiers, 3) Battery Chargers, and 4) DC-to-DC
Converters. The Mindi™ Amplifier Designer provides full schematic diagrams of the
amplifier application circuit with recommended component values and displays the
responses in frequency and time domains.
The Mindi™ Analog Simulator tool is a free web-based design tool available on the
Microchip web site at http://www.microchip.com un der “Online Simulat i on Tools” or
by going directly to the Mindi™ web site at http://www.microchip.com/mindi.
The circuit simulator within the Mindi™ Analog Simulator tool can be downloaded and
installed on a personal computer (PC) for more convenient simulations. Modified circuit
files can also be downloaded to the PC.
1.4 MCP6XXX AMPLIFIER EVALUATION BOARD 2 DESCRIPTION
MCP6XXX Amplifier Evaluation Board 2 is designed to support inverting/non-inverting
summing amplifier circuits, however, at this time, the Mindi™ Amplifier Designer only
supports the inverting summing amplifier circuits.
The MCP6XXX Amplifier Evaluation Board 2 has the following features:
• All amplifier resistors and capacitors are socketed
• All of the component labels on board keep consistent with those on schematic
generated in the Mindi™ Amplifier Designer
• 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 2.
Lab equipment can be attached (via test points) to measure the amplifier response.
DS51668A-page 6 © 2007 Microchip Technology Inc.
FIGURE 1-2: MCP6XXX Amplifier Evaluation Board 2 Block Diagram.
MCP6XXX AMPLIFIER EVALUATION
CR2
RR1
20 kΩ
RR2
20 kΩ
0.1 µF
UR1
U1
VDD
0.1 µF
CU1
CR1
0.1 µF
A
B
DP1
CP1
1.0 µF
Power Supply
D
JP2
C
R10
R2
R3
R4
R5
R6
R7
R8
VIN-2
VIN-3
VIN-4
VIN-5
VIN-6
VIN-7
VIN-8
RL
CL
VL
R11
VDD
VREF
GND
VDD
VIN-1
R9
GND
R1
RISO
GND
JP1
* Test Points
********
*
*
*
*
*
*
BOARD 2 USER ’S GUIDE
Chapter 2. Installation and Operation
2.1 INTRODUCTION
This chapter shows how to set up the MCP6XXX Amplifier Evaluation Board 2.
Items discussed in this chapter include:
• Required Tools
• MCP6XXX Amplifier Evaluation Board 2 Set-Up
• MCP6XXX Amplifier Evaluation Board 2 Operation
2.2 REQUIRED TOOLS
• Lab power supply
• Lab signal source (e.g., function generator)
• Lab measurement equipment (e.g., oscilloscope)
2.3 MCP6XXX AMPLIFIER EVALUATION BOARD 2 SET-UP
The MCP6XXX Amplifier Evaluation Board 2 supports inverting summing amplifier and
non-inverting summing amplifier. This section details the conversion of these
topologies to the MCP6XXX Amplifier Evaluation Board 2. Figure 2-1 shows the circuit
diagram for the board.
© 2007 Microchip Technology Inc. DS51668A-page 7
FIGURE 2-1: MCP6XXX Amplifier Evaluation Board 2 Circuit Diagram.
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
The power supply voltage needs to be in the allowed range for the installed op amps.
Any of Microchip’s op amps that operate b elow 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 mid-supply reference consists of a voltage divider and a buffer amplifier. (See
Figure 2-4: “Mid-supply Reference Block.”)
The resistors that are part of an amplifier are placed in pin sockets which are labeled.
All of the component labels on board keep consistent with those on schematic generated in the Mindi™ Amplifier Designer. 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 a nd output signal
allow lab equipment to be connected to the board. The MCP6XXX Amplifier Evaluation
Board 2 top view is shown in Figure 2-2.
FIGURE 2-2: MCP6XXX Amplifier Evaluation Board 2 Top View.
DS51668A-page 8 © 2007 Microchip Technology Inc.
Installation and Operation
Power Supply
V
S
V
DD
C
P1
D
P1
Note: DP1 is a zener diode with nominal voltage of 6.2V.
Mid-supply Reference
V
DD
V
R
C
R1
R
R1
U
R1
C
R2
R
R2
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. C
FIGURE 2-3: Power Supply Block.
2.3.1.2 MID-SUPPLY REFERENCE BLOCK
= 1.0 µF.
P1
The mid-supply reference consists of a voltag e divider and a buffer amplifier . Figure 2-4
shows the circuit diagram for the mid-supply reference.
C
= CR2 = 0.1 µF, R
R1
R1
= R
= 20.0 kΩ.
R2
FIGURE 2-4: Mid-supply Reference Block.
© 2007 Microchip Technology Inc. DS51668A-page 9
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
Output Load
V
L
C
L
R
L
V
OUT
R
ISO
2.3.1.3 OUTPUT LOAD BLOCK
The output load consists of a capacitor and two resistors. Figure 2-5 shows the circuit
diagram for the output load. R
capacitive load (C
L
). R
ISO
FIGURE 2-5: Output Load Block.
is used to stabilize the amplifier when it drives a large
ISO
is a short circuit (0Ω) when CL is small.
DS51668A-page 10 © 2007 Microchip Technology Inc.
Installation and Operation
Output
Load
Mid-supply
Reference
Power
Supply
V
S
V
R
V
L
V
2
V
3
V
DD
R
1
R
2
R
3
R
9
R
11
C
U1
U
1
V
OUT
V
1
VIN-2
VIN-3
VIN-4
VIN-5
VIN-6
VIN-7
VIN-8
VIN-1
********
CR2
RR1
20 kΩ
RR2
20 kΩ
0.1 µF
UR1
U1
0.1µF
CU1
CR1
0.1 µF
A
B
DP1
CP1
1.0 µF
Power Supply
D
JP2
C
R10
R2
R3
R4
R5
R6
R7
R8
RL
CL
R11
VDD
R9
R1
RISO
JP1
VDD
VL
VREF
GND
VDD
GND
GND
* Test Points
*
*
*
*
*
*
2.3.1.4 INVERTING SUMMING AMPLIFIER
• Amplifies two or more input voltages with an inverting gain. Input and output
voltages are shifted by a reference volt age for single supply
• The Mindi™ Amplifier Designer gives design recommendations for circuits with up
to 8 inputs; see the circuit diagram shown in Figure 2-6.
- Fill the sockets with the recommended resistors and capacitors
- Set JP1 and JP2 in the correct positions
(for the given example, JP1: Position A, JP2: Position C)
FIGURE 2-6: Inverting Summing Amplifier Circuit Diagram.
Figure 2-7 shows an example of the inverting summing amplifier circuit diagram supported by MCP6XXX Amplifier Evaluation Board 2.
© 2007 Microchip Technology Inc. DS51668A-page 11
FIGURE 2-7: Inverting Summing Amplifier Example Supported by the
MCP6XXX Amplifier Evaluation Board 2.
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
Output
Load
Mid-supply
Reference
Power
Supply
V
S
V
DD
V
L
V
1
V
2
V
3
V
OUT
V
R
R
1
R
2
R
3
R
10
R
11
C
U1
U
1
CR2
RR1
20 kΩ
RR2
20 kΩ
0.1 µF
UR1
U1
0.1 µF
CU1
CR1
0.1 µF
A
B
DP1
CP1
1.0 µF
Power Supply
D
JP2
C
R10
R2
R3
R4
R5
R6
R7
R8
RL
CL
R11
VDD
R9
R1
RISO
JP1
VDD
VIN-2
VIN-3
VIN-4
VIN-5
VIN-6
VIN-7
VIN-8
VL
VREF
GND
VDD
VIN-1
GND
GND
* Test Points
********
*
*
*
*
*
*
2.3.1.5 NON-INVERTING SUMMING AMPLIFIER (NOT SUPPORTED)
• Amplifies two or more voltages with a non-inverting gain. Input and output
voltages are shifted by a reference voltage for single supply
• It is up to the user to design this circuit to produce the target gains for up to eight
inputs
- Select the correct resistor and capacitor values
- Set JP1 and JP2 as needed
(for the given example, JP1: Position B, JP2: Position D)
FIGURE 2-8: Non-Inverting Summing Amplifier Circuit Diagram.
Figure 2-9 shows an example of the non-inverting summing amplifier circuit diagram
supported by MCP6XXX Amplifier Evaluation Board 2.
DS51668A-page 12 © 2007 Microchip Technology Inc.
FIGURE 2-9: Non-Inverting Summing Amplifier Example Supported by the
MCP6XXX Amplifier Evaluation Board 2.
Installation and Operation
2.4 MCP6XXX AMPLIFIER EVALUATION BOARD 2 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
The accessory bag that comes with this kit makes it quick and easy to evaluate the
amplifier described below, which was designed in the Mindi™ Amplifier Designer.
This amplifier is described as follows:
• Inverting Summing Amplifier (Single Supply Configuration)
• Power Supply Voltage is 5.0V
• Desired Gain for V
• Desired Gain for V
• Desired Gain for V
• Load Capacitance is 56pF
IN-1
IN-2
IN-3
is 1 V/V
is 1 V/V
is 1 V/V
FIGURE 2-10: Inverting Summing Amplifier Designed In the Mindi™ Amplifier Designer.
© 2007 Microchip Technology Inc. DS51668A-page 13
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
R
11
R
9
C
U1
V
R
V
L
V
OUT
Output
Load
Mid-supply
Reference
V
IN-1
R
1
R
2
R
3
U
1
V
S
V
DD
Power
Supply
V
IN-2
V
IN-3
Figure 2-11 shows the same circuit redrawn to emphasize the inverting summing
amplifier.
FIGURE 2-11: Inverting Summing Amplifier Supported by the MCP6XXX
Amplifier Evaluation Board 2 Kit.
Each of the components in Figure 2-11 that needs to be inserted in a socket on the
MCP6XXX Amplifier Evaluation Board 2 is listed in Table 2-1 and Table 2-2.
TABLE 2-1: AMPLIFIER COMPONENTS LIST
PCB Labels Component Values
R1 7.96 kΩ
R2 7.96 kΩ
R3 7.96 kΩ
R9 2.00 kΩ
R1 1 7.96 kΩ
RISO 0Ω
RL 7.96 kΩ
CL 56 nF
U1 MCP6021, PDIP-8, 10 MHz
TABLE 2-2: JUMPER POSITIONS
Jumper Position
JP1 A
JP2 C
DS51668A-page 14 © 2007 Microchip Technology Inc.
Installation and Operation
CR2
RR1
20 kΩ
RR2
20 kΩ
0.1 µF
UR1
U1
0.1 µF
CU1
CR1
0.1 µF
A
B
DP1
CP1
1.0 µF
Power Supply
D
JP2
C
R10
R2
R3
R4
R5
R6
R7
R8
RL
CL
R11
VDD
R9
R1
RISO
VDD
JP1
VIN-2
VIN-3
VIN-4
VIN-5
VIN-6
VIN-7
VIN-8
VL
VREF
GND
VDD
VIN-1
GND
GND
* Test Points
********
*
*
*
*
*
*
Figure 2-12 is the fully assembled inverting summing amplifier’s circuit diagram.
FIGURE 2-12: Fully Assembled Inverting Summing Amplifier Supported by the
MCP6XXX Amplifier Evaluation Board 2.
The fully assembled MCP6XXX Amplifier Evaluation Board 2 top view is shown in
Figure 2-13.
© 2007 Microchip Technology Inc. DS51668A-page 15
FIGURE 2-13: Picture of the Inverting Summing Amplifie r Supp or te d by the
MCP6XXX Amplifier Evaluation Board 2.
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
VDD
VL
VREF
GND
Signal Inputs
Test Point
GND
Te st Point
GND
Test Point
T est Point
Test Point
Test Point
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 a nd output signal
allow lab equipment to be connected to the bo ard. Figure 2-14 shows the test points to
check.
FIGURE 2-14: Checking the Test Points.
DS51668A-page 16 © 2007 Microchip Technology Inc.
Installation and Operation
VIN = 3.2V
V
OUT
= 0.4V
V
REF
= 2.5V
2.4.2.2 TRANSIENT RESPONSES
This inverting summing amplifier was built, and its responses were measured. A
MCP6021 op amp, 1% resistors, and 5% capacitors were used. Notice how close the
measured and simulated data are.
2.4.2.2.1 Transient Step Response
In Bench Measurement:
•Set V
0.7V below center and ends 0.7V above center)
• The measured step response is shown in Figure 2-15. It is a signal with a step
amplitude of 4.2V and a center voltage of 2.5V. (i.e. V
and ends 2.1V below center)
with a step amplitude of 1.4V and a center voltage of 2.5V. (i.e. VIN starts
IN
starts 2.1V above center
OUT
Note: The center voltage of V
V
= 2.5V)
REF
is set at V
IN
FIGURE 2-15: Measured Step Response.
= VDD/2 (For VDD = 5.0V,
REF
© 2007 Microchip Technology Inc. DS51668A-page 17
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
VIN = 3.2V
V
OUT
= 0.4V
V
REF
= 2.5V
In the Mindi™ Amplifier Designer:
•Set V
0.7V below center and ends 0.7V above center)
• The output step response is shown in Figure 2-16. It is a signal with a step
amplitude of 4.2V and a center voltage of 2.5V. (i.e. V
and ends 2.1V below center)
with a step amplitude of 1.4V and a center voltage of 2.5V. (i.e. VIN starts
IN
starts 2.1V above center
OUT
Note: The center voltage of V
V
= 2.5V)
REF
is set at V
IN
= VDD/2 (For VDD = 5.0V,
REF
FIGURE 2-16: Simulated Step Response.
DS51668A-page 18 © 2007 Microchip Technology Inc.
Installation and Operation
V
IN
V
OUT
V
REF
2.4.2.2.2 Transient Sine Wave Response
In Bench Measurement:
•Set V
1.4V and a center voltage of 2.5V
• The measured sine wave response is shown in Figure 2-17. It is a sine wave
signal with a frequency of 100.0 Hz, a peak-to-peak voltage of 4.2V and a center
voltage of 2.5V
as a sine wave with a frequency of 100.0 Hz, a peak-to-peak voltage of
IN
Note: The center voltage of V
V
= 2.5V)
REF
is set at V
IN
= VDD/2 (For VDD = 5.0V,
REF
FIGURE 2-17: Measured Sine Wave Response.
© 2007 Microchip Technology Inc. DS51668A-page 19
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
V
OUT
V
IN
V
REF
In the Mindi™ Amplifier Designer:
•Set V
1.4V and a center voltage of 2.5V
• The simulated sine wave response is shown in Figure 2-18. It is a sine wave
signal with a frequency of 100.0 Hz, a peak-to-peak voltage of 4.2V and a center
voltage of 2.5V
as a sine wave with a frequency of 100.0 Hz, a peak-to-peak voltage of
IN
Note: The center voltage of V
V
= 2.5V)
REF
is set at V
IN
= VDD/2 (For VDD = 5.0V,
REF
FIGURE 2-18: Simulated Sine Wave Response.
DS51668A-page 20 © 2007 Microchip Technology Inc.
Installation and Operation
Solder an SOIC-8
Op Amp onto the
board
The PDIP socket
(U1) must be empty.
2.4.3 Amplifier Modifications Using 8-Pin SOIC Op Amps
There are two options available to use single op amps in SOIC-8 packages
(150 mil wide):
• Soldering onto the MCP6XXX Amplifier Evaluation Board 2, 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 2-19 shows a SOIC-8 op amp soldered onto the MCP6XXX Amplifier Evaluation
Board 2.
FIGURE 2-19: Op Amp in SOIC-8 package soldered onto MCP6XXX Amplifier
Evaluation Board 2.
Figure 2-20 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 ar e Samtec part #
BBS-14-T-B or equivalent and are soldered into the through holes for the DIP-8 socket.
Figure 2-21 shows this board plugged into the MCP6XXX Amplifier Evaluation Board
2.
Note: Insert the interconnect strips into the DIP-8 socket on the MCP6XXX
Amplifier Evaluation Board 2. 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.
© 2007 Microchip Technology Inc. DS51668A-page 21
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
(Front View)
(Back View)
FIGURE 2-20: Op Amp in SOIC-8 package soldered to a separate board.
FIGURE 2-21: Connecting Adaptor Board onto MCP6XXX Amplifier Evaluation
Board 2.
DS51668A-page 22 © 2007 Microchip Technology Inc.
Appendix A. Schematic and Layouts
A.1 INTRODUCTION
This appendix contains the following schematics and layouts for the MCP6XXX Amplifier Evaluation Board 2:
• Board – Schematic
• Board – Top Silk Layer
• Board – Top Metal Layer
• Board – Bottom Metal Layer
MCP6XXX AMPLIFIER EVALUATION
BOARD 2 USER’S GUIDE
© 2007 Microchip Technology Inc. DS51668A-page 23
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
31
M
A.2 BOARD - SCHEMATIC
DS51668A-page 24 © 2007 Microchip Technology Inc.
A.3 BOARD - TOP SILK LAYER
Schematic and Layouts
© 2007 Microchip Technology Inc. DS51668A-page 25
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
A.4 BOARD - TOP METAL LAYER
DS51668A-page 26 © 2007 Microchip Technology Inc.
A.5 BOARD - BOTTOM METAL LAYER
Schematic and Layouts
© 2007 Microchip Technology Inc. DS51668A-page 27
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
NOTES:
DS51668A-page 28 © 2007 Microchip Technology Inc.
MCP6XXX AMPLIFIER EVALUATION
BOARD 2 USER’S GUIDE
Appendix B. Bill of Materials (BOM)
B.1 MCP6XXX AMPLIFIER EVALUATION BOARD 2 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: BILL OF MATERIALS (102-00148R1) (NOTE 1)
Qty Reference Description Manufacturer Part Number
1 CP1 Capacitor Ceramic 1 µF 10%
25V X5R 0805
4 CR1, CR2, CU1,
CU2
1 DP1 Zener Diode, 6.2V 350mW
4 Ea Corner Bumper clear 0.375X 15” Dome Richco Plastic Co RBS-12
2 J1, J2 Connector Header Breakaway
1 PCB RoHS Compliant Bare PCB,
28 Pin Sockets Pin Recpt, 0.015/.025 dia., 0667
2 RR1, RR2 Resistor 20.0 kΩ, 1/8W, 1%,
2 Shunts for J1, J2 Socket,Short Blks w/Tab Blk Jameco, Valuepro 2012JH-R
14 Test Points PC Test Point, Compact,
1 UR1 MCP6021 SOT-23-5, Single Op
1 U1 IC Socket, 8-position DIP, Tin AMP/Tyco Electronics 2-641260-1
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.
Capacitor Ceramic 0.1 µF 10%
25V X7R 0805
SOT-23
0.100 04POS STR
MCP6XXX Amplifier Evaluation
Board 2
SER
0805 SMD
Surface Mount
Amp
Panasonic
Panasonic- ECG ECJ-2VB1E104K
Fairchild Semiconductor®BZX84C6V2
AMP
— 104-00148
Mill-Max
Panasonic- ECG ERJ-6ENF2002V
Keystone Electronics
Microchip Technology Inc MCP6021T-E/OT
®
- ECG ECJ-2FB1E105K
®
/Tyco® Electronics 9-146258-0-02
®
0667-0-15-01-30-27-10-0
®
5016
© 2007 Microchip Technology Inc. DS51668A-page 29
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
TABLE B-2: BILL OF MATERIALS – UNPOPULATED PARTS (102-00148R1)
Qty
Reference Description Manufacturer Part Number
1 U1 MCP6021, PDIP-8, Single Op
Amp
1 U2 MCP6021, SOIC-8, Single Op
Amp
15 R1-R7, RISO, RL
C1-C5, 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
Microchip Technology Inc MCP6021-E/SN
——
The BOM in Table B-3 corresponds to the collection of resistors, capacitors, jumpers
and MCP6021 op amps that come in the Accessory Bag which is shipped in the
MCP6XXX Amplifier Evaluation Board 2 Kit. These components are placed in an
separate ESD bag. They support the circuit in Secti on 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)
Qty
1 Accessory Bag CAP CER 56PF 50V C0G
1 Accessory Bag JUMPER ZERO OHM 1/8W Yageo Corporation ZOR-12-B-52
1 Accessory Bag RES 2.00K OHM 1/4W 1%
5 Accessory Bag RES 7.87K OHM 1/4W 1%
1 ESD Sample Box MCP6021, Single Op Amp,
Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM
Reference Description Manufacturer Part Number
Murata Electronics RPE5C1H560J2P1Z03B
RADIAL
Yageo Corporation MFR-25FBF-2K00
METAL FILM
Yageo Corporation MFR-25FBF-7K87
METAL FILM
Microchip Technology Inc. MCP6021-E/P
PDIP-8
used in manufacturing uses all RoHS-compliant components.
DS51668A-page 30 © 2007 Microchip Technology Inc.
NOTES:
Bill of Materials (BOM)
© 2007 Microchip Technology Inc. DS51668A-page 31
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DS51668A-page 32 © 2007 Microchip Technology Inc.
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