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® IDE on-line help.
Select the Help menu, and then Topics to open a list of available on-line help files.
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 operation
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
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...
the Output window
the Settings dialog
select Enable Programmer
“Save project before build”
A dialog button
A tab
A number in verilog format,
where N is the total number of
digits, R is the radix and n is a
digit.
A key on the keyboard
Click OK
Click the Power tab
4‘b0010, 2‘hF1
Italic Courier New
Sample source code
Filenames
File paths
Keywords
Command-line options
Bit values
Constants
A variable argument
Square brackets [ ]
Optional arguments
Curly brackets and pipe
character: { | }
Ellipses...
Choice of mutually exclusive
arguments; an OR selection
Replaces repeated text
#define START
autoexec.bat
c:\mcc18\h
_asm, _endasm, static
-Opa+, -Opa0, 1
0xFF, ‘A’
file.o, where file can be
any valid filename
mcc18 [options] file
[options]
errorlevel {0|1}
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 code supplied by
user
DS51668A-page 2
Examples
File>Save
Press <Enter>, <F1>
var_name [,
var_name...]
void main (void)
{ ...
}
© 2007 Microchip Technology Inc.
Preface
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
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 Simulator 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:
© 2007 Microchip Technology Inc.
MCP6XXX Amplifier Evaluation Board 2 Kit.
DS51668A-page 5
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
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 under “Online Simulation 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.
Signal Inputs
and
Test Points
Amplifier Circuit
(Op Amp, Resistors,
Capacitors and Jumpers)
Mid-Supply Ref
and
Test Point
FIGURE 1-2:
DS51668A-page 6
Signal Output
and Test Point
Power Supply
and Test Point
MCP6XXX Amplifier Evaluation Board 2 Block Diagram.
© 2007 Microchip Technology Inc.
MCP6XXX AMPLIFIER EVALUATION
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.
* Test Points
VDD
GND
0.1 µF
*
*
R1
VIN-1
CU1
JP1
*
R2
U1
A
VIN-2
B
*
R11
VIN-3
R4
R9
*
JP2
GND
R10
RISO
*
R3
C
VIN-4
R5
*
*
D
VIN-5
CL
VDD
VL
*
R6
RL
RR1
20 kΩ
*
R7
VIN-8
FIGURE 2-1:
© 2007 Microchip Technology Inc.
VREF
UR1
GND
*
*
R8
RR2
0.1 µF 20 kΩ
Power Supply
CR1
*
CR2
VIN-7
0.1 µF
*
VIN-6
VDD
DP1
CP1
1.0 µF
MCP6XXX Amplifier Evaluation Board 2 Circuit Diagram.
DS51668A-page 7
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 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 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 and 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:
DS51668A-page 8
MCP6XXX Amplifier Evaluation Board 2 Top View.
© 2007 Microchip Technology Inc.
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.
MID-SUPPLY REFERENCE BLOCK
The mid-supply reference consists of a voltage divider and a buffer amplifier. Figure 2-4
shows the circuit diagram for the mid-supply reference.
CR1 = CR2 = 0.1 µF, RR1 = RR2 = 20.0 kΩ.
Mid-supply Reference
VDD
RR1
CR2
FIGURE 2-4:
© 2007 Microchip Technology Inc.
RR2
CR1
UR1
VR
Mid-supply Reference Block.
DS51668A-page 9
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
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. RISO is used to stabilize the amplifier when it drives a large
capacitive load (CL). RISO is a short circuit (0Ω) when CL is small.
VOUT
Output Load
RISO
VL
RL
FIGURE 2-5:
DS51668A-page 10
CL
Output Load Block.
© 2007 Microchip Technology Inc.
Installation and Operation
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 voltage 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)
VS
VDD
Mid-supply
Reference
V1
V2
V3
FIGURE 2-6:
Power
Supply
CU1
VR
VOUT
R9
U1
Output
Load
VL
R1
R2
R11
R3
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.
* Test Points
VDD
0.1µF
GND
*
*
R1
CU1
VIN-1
JP1
*
R2
U1
A
VIN-2
B
*
R11
VIN-3
R4
R9
*
JP2
R10
RISO
GND
*
R3
C
VIN-4
R5
*
VIN-5
*
D
CL
VDD
VL
*
R6
RL
R7
*
RR2
0.1 µF 20 kΩ
VREF
*
R8
*
Power Supply
CR1
CR2
VIN-7
VIN-8
0.1 µF
UR1
GND
*
RR1
20 kΩ
*
VIN-6
VDD
CP1
DP1 1.0 µF
FIGURE 2-7:
Inverting Summing Amplifier Example Supported by the
MCP6XXX Amplifier Evaluation Board 2.
© 2007 Microchip Technology Inc.
DS51668A-page 11
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
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)
VS
VDD
R1
CU1
V1
R2
V2
VOUT
U1
R3
V3
Mid-supply
Reference
FIGURE 2-8:
Power
Supply
Output
Load
VL
VR
R10
R11
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.
* Test Points
VDD
R1
0.1 µF
*
*
GND
CU1
VIN-1
R2
*
JP1
U1
A
VIN-2
B
R11
VIN-3
R4
*
JP2
VIN-4
R5
R9
R10
RISO
GND
*
*
R3
C
*
*
D
VIN-5
CL
VDD
VL
*
R6
RL
*
R7
RR2
0.1 µF 20 kΩ
Power Supply
VREF
*
R8
*
CR1
CR2
VIN-7
VIN-8
0.1 µF
UR1
GND
*
RR1
20 kΩ
*
VIN-6
VDD
DP1
CP1
1.0 µF
FIGURE 2-9:
Non-Inverting Summing Amplifier Example Supported by the
MCP6XXX Amplifier Evaluation Board 2.
DS51668A-page 12
© 2007 Microchip Technology Inc.
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:
•
•
•
•
•
•
FIGURE 2-10:
Inverting Summing Amplifier (Single Supply Configuration)
Power Supply Voltage is 5.0V
Desired Gain for VIN-1 is 1 V/V
Desired Gain for VIN-2 is 1 V/V
Desired Gain for VIN-3 is 1 V/V
Load Capacitance is 56 pF
Inverting Summing Amplifier Designed In the Mindi™ Amplifier Designer.
© 2007 Microchip Technology Inc.
DS51668A-page 13
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
Figure 2-11 shows the same circuit redrawn to emphasize the inverting summing
amplifier.
VS
VDD
Mid-supply
Reference
Power
Supply
CU1
VR
VOUT
R9
U1
R1
Output
Load
VL
VIN-1
R2
VIN-2
R11
R3
VIN-3
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
R11
7.96 kΩ
RISO
TABLE 2-2:
Jumper
DS51668A-page 14
0Ω
RL
7.96 kΩ
CL
56 nF
U1
MCP6021, PDIP-8, 10 MHz
JUMPER POSITIONS
Position
JP1
A
JP2
C
© 2007 Microchip Technology Inc.
Installation and Operation
Figure 2-12 is the fully assembled inverting summing amplifier’s circuit diagram.
* Test Points
VDD
GND
0.1 µF
*
*
R1
CU1
VIN-1
JP1
*
R2
U1
A
VIN-2
B
*
R11
VIN-3
*
R4
R9
JP2
R10
RISO
GND
*
R3
C
VIN-4
*
D
VIN-5
*
R5
CL
VDD
VL
RL
*
R6
VIN-8
CR2 RR2
0.1 µF 20 kΩ
UR1
GND
*
*
R8
Power Supply
VREF
*
VIN-7
0.1 µF
CR1
*
R7
RR1
20 kΩ
*
VIN-6
VDD
CP1
DP1 1.0 µF
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.
FIGURE 2-13:
Picture of the Inverting Summing Amplifier Supported by the
MCP6XXX Amplifier Evaluation Board 2.
© 2007 Microchip Technology Inc.
DS51668A-page 15
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
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 2-14 shows the test points to
check.
Signal Inputs
GND
Test Point
GND
Test Point
VL
Test Point
VREF
Test Point
FIGURE 2-14:
DS51668A-page 16
GND
Test Point
VDD
Test Point
Checking the Test Points.
© 2007 Microchip Technology Inc.
Installation and Operation
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 VIN with a step amplitude of 1.4V and a center voltage of 2.5V. (i.e. VIN starts
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. VOUT starts 2.1V above center
and ends 2.1V below center)
Note:
The center voltage of VIN is set at VREF = VDD/2 (For VDD = 5.0V,
VREF = 2.5V)
VIN = 3.2V
VREF = 2.5V
VOUT = 0.4V
FIGURE 2-15:
© 2007 Microchip Technology Inc.
Measured Step Response.
DS51668A-page 17
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
In the Mindi™ Amplifier Designer:
• Set VIN with a step amplitude of 1.4V and a center voltage of 2.5V. (i.e. VIN starts
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. VOUT starts 2.1V above center
and ends 2.1V below center)
Note:
The center voltage of VIN is set at VREF = VDD/2 (For VDD = 5.0V,
VREF = 2.5V)
VIN = 3.2V
VREF = 2.5V
VOUT = 0.4V
FIGURE 2-16:
DS51668A-page 18
Simulated Step Response.
© 2007 Microchip Technology Inc.
Installation and Operation
2.4.2.2.2
Transient Sine Wave Response
In Bench Measurement:
• Set VIN as a sine wave with a frequency of 100.0 Hz, a peak-to-peak voltage of
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
Note:
The center voltage of VIN is set at VREF = VDD/2 (For VDD = 5.0V,
VREF = 2.5V)
VOUT
VIN
FIGURE 2-17:
© 2007 Microchip Technology Inc.
VREF
Measured Sine Wave Response.
DS51668A-page 19
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
In the Mindi™ Amplifier Designer:
• Set VIN as a sine wave with a frequency of 100.0 Hz, a peak-to-peak voltage of
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
Note:
The center voltage of VIN is set at VREF = VDD/2 (For VDD = 5.0V,
VREF = 2.5V)
VOUT
VIN
FIGURE 2-18:
DS51668A-page 20
VREF
Simulated Sine Wave Response.
© 2007 Microchip Technology Inc.
Installation and Operation
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.
Solder an SOIC-8
Op Amp onto the
board
The PDIP socket
(U1) must be empty.
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 are 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:
© 2007 Microchip Technology Inc.
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.
DS51668A-page 21
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
(Front View)
DS51668A-page 22
(Back View)
FIGURE 2-20:
Op Amp in SOIC-8 package soldered to a separate board.
FIGURE 2-21:
Board 2.
Connecting Adaptor Board onto MCP6XXX Amplifier Evaluation
© 2007 Microchip Technology Inc.
MCP6XXX AMPLIFIER EVALUATION
BOARD 2 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 2:
•
•
•
•
Board – Schematic
Board – Top Silk Layer
Board – Top Metal Layer
Board – Bottom Metal Layer
© 2007 Microchip Technology Inc.
DS51668A-page 23
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
BOARD - SCHEMATIC
M
A.2
1
3
DS51668A-page 24
© 2007 Microchip Technology Inc.
Schematic and Layouts
A.3
BOARD - TOP SILK LAYER
© 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.
Schematic and Layouts
A.5
BOARD - BOTTOM METAL LAYER
© 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:
Qty
BILL OF MATERIALS (102-00148R1) (NOTE 1)
Reference
Description
Manufacturer
Part Number
1
CP1
Capacitor Ceramic 1 µF 10%
25V X5R 0805
Panasonic®
4
CR1, CR2, CU1,
CU2
Capacitor Ceramic 0.1 µF 10%
25V X7R 0805
Panasonic- ECG
1
DP1
Zener Diode, 6.2V 350mW
SOT-23
Fairchild Semiconductor® BZX84C6V2
4
Ea Corner
Bumper clear 0.375X 15” Dome Richco Plastic Co
- ECG
ECJ-2FB1E105K
ECJ-2VB1E104K
RBS-12
2
J1, J2
Connector Header Breakaway
0.100 04POS STR
AMP®/Tyco®
1
PCB
RoHS Compliant Bare PCB,
MCP6XXX Amplifier Evaluation
Board 2
—
28
Pin Sockets
Pin Recpt, 0.015/.025 dia., 0667 Mill-Max®
SER
0667-0-15-01-30-27-10-0
2
RR1, RR2
Resistor 20.0 kΩ, 1/8W, 1%,
0805 SMD
Panasonic- ECG
ERJ-6ENF2002V
Electronics
9-146258-0-02
104-00148
2
Shunts for J1, J2
Socket,Short Blks w/Tab Blk
Jameco, Valuepro
2012JH-R
14
Test Points
PC Test Point, Compact,
Surface Mount
Keystone Electronics®
5016
1
UR1
MCP6021 SOT-23-5, Single Op
Amp
Microchip Technology Inc MCP6021T-E/OT
1
U1
IC Socket, 8-position DIP, Tin
AMP/Tyco Electronics
Note 1:
2-641260-1
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.
© 2007 Microchip Technology Inc.
DS51668A-page 29
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
TABLE B-2:
Qty
BILL OF MATERIALS – UNPOPULATED PARTS (102-00148R1)
Reference
Description
Manufacturer
Part Number
1
U1
MCP6021, PDIP-8, Single Op
Amp
Microchip Technology Inc MCP6021-E/P
1
U2
MCP6021, SOIC-8, Single Op
Amp
Microchip Technology Inc MCP6021-E/SN
15
R1-R7, RISO, RL
C1-C5, CL
Not populated when shipped to
customer
—
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.
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 Section 2.4.1 “Building the Amplifier”.
Customers need to provide the resistors and capacitors for more amplifier circuits.
TABLE B-3:
Qty
BILL OF MATERIALS – ACCESSORY BAG PARTS (102-00148R1)
Reference
Description
Manufacturer
Part Number
1
Accessory Bag
CAP CER 56PF 50V C0G
RADIAL
Murata Electronics
RPE5C1H560J2P1Z03B
1
Accessory Bag
JUMPER ZERO OHM 1/8W
Yageo Corporation
ZOR-12-B-52
1
Accessory Bag
RES 2.00K OHM 1/4W 1%
METAL FILM
Yageo Corporation
MFR-25FBF-2K00
5
Accessory Bag
RES 7.87K OHM 1/4W 1%
METAL FILM
Yageo Corporation
MFR-25FBF-7K87
1
ESD Sample Box
MCP6021, Single Op Amp,
PDIP-8
Microchip Technology Inc. MCP6021-E/P
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.
DS51668A-page 30
© 2007 Microchip Technology Inc.
Bill of Materials (BOM)
NOTES:
© 2007 Microchip Technology Inc.
DS51668A-page 31
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06/25/07
DS51668A-page 32
© 2007 Microchip Technology Inc.