MCP6XXX Amplifier
Evaluation Board 1
User’s Guide
© 2007 Microchip Technology Inc.
DS51667A
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DS51667A-page ii
© 2007 Microchip Technology Inc.
MCP6XXX AMPLIFIER EVALUATION
BOARD 1 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 1 Kit Contents ................................... 5
1.3 Microchip’s Web-Based Mindi™ Analog Simulator ........................................ 6
1.4 MCP6XXX Amplifier Evaluation Board 1 Description ..................................... 6
Chapter 2. Installation and Operation ......................................................................... 7
2.1 Introduction ..................................................................................................... 7
2.2 Required Tools ............................................................................................... 7
2.3 MCP6XXX Amplifier Evaluation Board 1 Set-up ............................................ 7
2.4 MCP6XXX Amplifier Evaluation Board 1 Operation ..................................... 18
Appendix A. Schematic and Layouts ......................................................................... 29
A.1 Introduction .................................................................................................. 29
A.2 Board - Schematic ....................................................................................... 30
A.3 Board - Top Silk Layer ................................................................................. 31
A.4 Board - Top Metal Layer .............................................................................. 32
A.5 Board - Bottom Metal Layer ......................................................................... 33
Appendix B. Bill Of Materials (BOM) .......................................................................... 35
B.1 MCP6XXX Amplifier Evaluation Board 1 BOM ............................................ 35
Worldwide Sales and Service .................................................................................... 38
© 2007 Microchip Technology Inc.
DS51667A-page iii
MCP6XXX Amplifier Evaluation Board 1 User’s Guide
NOTES:
DS51667A-page iv
© 2007 Microchip Technology Inc.
MCP6XXX AMPLIFIER EVALUATION
BOARD 1 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 1. 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 1. The
manual layout is as follows:
• Chapter 1. “Product Overview” - Provides all important information about the
MCP6XXX Amplifier Evaluation Board 1.
• Chapter 2. “Installation and Operation” – Covers the installation and operation
of the MCP6XXX Amplifier Evaluation Board 1. It lists the required tools, shows
how to set up the board, and demonstrates how to verify the operation.
• Appendix A. “Schematic and Layouts” – Shows the schematic and board
layouts for the MCP6XXX Amplifier Evaluation Board 1.
• Appendix B. “Bill Of Materials (BOM)” – Lists the parts used to build the
MCP6XXX Amplifier Evaluation Board 1.
© 2007 Microchip Technology Inc.
DS51667A-page 1
MCP6XXX Amplifier Evaluation Board 1 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
DS51667A-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 1. Other
useful documents are listed below. The following Microchip documents are available
and recommended as supplemental reference resources.
MCP6021 Data Sheet “Rail-to-Rail Input/Output, 10 MHz Op Amps“ (DS21685)
This data sheet provides detailed information regarding the MCP6021 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.
DS51667A-page 3
MCP6XXX Amplifier Evaluation Board 1 User’s Guide
NOTES:
DS51667A-page 4
© 2007 Microchip Technology Inc.
MCP6XXX AMPLIFIER EVALUATION
BOARD 1 USER’S GUIDE
Chapter 1. Product Overview
1.1
INTRODUCTION
The MCP6XXX Amplifier Evaluation Board 1is described by the following:
• Assembly # : 114-00147
• Order # : MCP6XXXEV-AMP1
• Name: MCP6XXX Amplifier Evaluation Board 1
Items discussed in this chapter include:
• Section 1.2 “MCP6XXX Amplifier Evaluation Board 1 Kit Contents”
• Section 1.3 “Microchip’s Web-Based Mindi™ Analog Simulator”
• Section 1.4 “MCP6XXX Amplifier Evaluation Board 1 Description”
1.2
MCP6XXX AMPLIFIER EVALUATION BOARD 1 KIT CONTENTS
•
•
•
•
MCP6XXX Amplifier Evaluation Board 1 - 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 1 User’s Guide (DS51667)
FIGURE 1-1:
© 2007 Microchip Technology Inc.
MCP6XXX Amplifier Evaluation Board 1 Kit.
DS51667A-page 5
MCP6XXX Amplifier Evaluation Board 1 User’s Guide
1.3
MICROCHIP’S WEB-BASED MINDI™ ANALOG SIMULATOR
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 1 DESCRIPTION
The MCP6XXX Amplifier Evaluation Board 1 is designed to support
inverting/non-inverting amplifiers, voltage follower, inverting/non-inverting comparators, inverting/non-inverting differentiators.
However, at this time, the Mindi™ Amplifier Designer does not support the non-inverting comparator or the non-inverting differentiator.
MCP6XXX Amplifier Evaluation Board 1 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 accommodated; see Section 2.4.3 “Amplifier
Modification: 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 1.
Lab equipment can be attached (via test points) to measure the amplifier response.
Mid-Supply Ref
and
Test Point
Power Supply
and
Test Point
Signal Input
and
Test Point
FIGURE 1-2:
DS51667A-page 6
Amplifier
Resistor and Capacitor
Sockets
Signal Output
and
Test Point
MCP6XXX Amplifier Evaluation Board 1 Block Diagram.
© 2007 Microchip Technology Inc.
MCP6XXX AMPLIFIER EVALUATION
BOARD 1 USER’S GUIDE
Chapter 2. Installation and Operation
2.1
INTRODUCTION
This chapter shows how to set up the MCP6XXX Amplifier Evaluation Board 1 and
verify its operation. This chapter includes the following topics:
• Required Tools
• MCP6XXX Amplifier Evaluation Board 1 Set-Up
• MCP6XXX Amplifier Evaluation Board 1 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 1 SET-UP
The MCP6XXX Amplifier Evaluation Board 1 is designed to support
inverting/non-inverting amplifiers, voltage follower, inverting/non-inverting
comparators, inverting/non-inverting differentiators
At this time, the Mindi™ Amplifier Designer does not support the non-inverting
comparator or the non-inverting differentiator.
This section details the conversion of these topologies to the MCP6XXX Amplifier
Evaluation Board 1. Figure 2-1 shows the circuit diagram for the board.
VDD
* Test Points
0.1 µF
RR1
20 kΩ
CR1
RR2
CR2
0.1 µF 20 kΩ
JP2
C
UR1
R5
R6
D
C4
VDD
*
0.1 µF
VREF
CU1
C2
Power Supply
*
R4
VDD
CP1
1.0 µF
DP1
R1
R2
U1
R3
C1
C3
RISO
*
GND
VL
R7
CL
RL
GND
*
C5
*
A
*
JP1
VIN
B
FIGURE 2-1:
© 2007 Microchip Technology Inc.
MCP6XXX Amplifier Evaluation Board 1 Circuit Diagram.
DS51667A-page 7
MCP6XXX Amplifier Evaluation Board 1 User’s Guide
The power supply voltage should 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, 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 and capacitors 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
Modification: 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 1 top view is shown in Figure 2-2.
FIGURE 2-2:
DS51667A-page 8
MCP6XXX Amplifier Evaluation Board 1 Top View.
© 2007 Microchip Technology Inc.
Installation and Operation
2.3.1
2.3.1.1
Top Level Amplifier Circuit Diagrams
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.
DS51667A-page 9
MCP6XXX Amplifier Evaluation Board 1 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. RISO is a short ciruit (0Ω) when CL is small.
Output Load
VOUT
RISO
VL
RL
FIGURE 2-5:
DS51667A-page 10
CL
Output Load Block.
© 2007 Microchip Technology Inc.
Installation and Operation
2.3.1.4
INVERTING AMPLIFIER
• Amplifies a voltage 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 an inverting
amplifier circuit; 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 B, JP2: Position C)
VS
VDD
CU1
VR R5
Mid-supply
Reference
Power
Supply
VOUT
Output
Load
U1
VL
VIN
R2
FIGURE 2-6:
R3
Inverting Amplifier Circuit Diagram.
Figure 2-7 shows an example of the inverting amplifier circuit diagram supported by
MCP6XXX Amplifier Evaluation Board 1.
* Test Points
VDD
0.1 µF
RR1
20 kΩ
CR1
CR2
0.1 µF
RR2
20 kΩ
JP2
C
UR1
R5
R6
D
C4
VDD
*
0.1 µF
VREF
CU1
C2
Power Supply
*
R4
VDD
CP1
1.0 µF
DP1
U1
R1
R2
R3
C1
C3
RISO
*
GND
VL
R7
CL
RL
GND
*
C5
*
A
*
JP1
VIN
B
FIGURE 2-7:
Inverting Amplifier Example Supported by the MCP6XXX
Amplifier Evaluation Board 1.
© 2007 Microchip Technology Inc.
DS51667A-page 11
MCP6XXX Amplifier Evaluation Board 1 User’s Guide
2.3.1.5
NON-INVERTING AMPLIFIER
• Amplifies a voltage with a non-inverting gain > +1 V/V. Input and output voltages
are shifted by a reference voltage for single supply
• The Mindi™ Amplifier Designer gives design recommendations for the non-inverting amplifier circuit; see the circuit diagram shown in Figure 2-8
- 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 D)
VS
VDD
CU1
R4
VIN
Power
Supply
VOUT
U1
VL
VR
Mid-supply
Reference
FIGURE 2-8:
Output
Load
R3
R2
Non-Inverting Amplifier Circuit Diagram.
Figure 2-9 shows an example of the inverting amplifier circuit diagram supported by
MCP6XXX Amplifier Evaluation Board 1.
* Test Points
VDD
0.1 µF
RR1
20 kΩ
CR1
CR2
0.1 µF
RR2
20 kΩ
JP2
C
UR1
R5
R6
D
C4
VDD
*
0.1 µF
VREF
CU1
C2
Power Supply
*
R4
VDD
CP1
1.0 µF
DP1
R1
R2
U1
R3
C1
C3
RISO
*
GND
VL
R7
CL
RL
GND
*
C5
*
A
*
JP1
VIN
B
FIGURE 2-9:
Non-Inverting Amplifier Example Supported by the MCP6XXX
Amplifier Evaluation Board 1.
DS51667A-page 12
© 2007 Microchip Technology Inc.
Installation and Operation
2.3.1.6
VOLTAGE FOLLOWER
• Known as a Unity Gain Buffer and as a Voltage Follower. Amplifies a voltage with
a gain of 1 V/V
• The Mindi™ Amplifier Designer gives design recommendations for the voltage
follower circuit; see the circuit diagram shown in Figure 2-10
- 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 N/A)
VS
VDD
Power
Supply
CU1
R4
VIN
VOUT
U1
Output
Load
VL
R3
FIGURE 2-10:
Voltage Follower Circuit Diagram.
Figure 2-11 shows an example of the voltage amplifier circuit diagram supported by
MCP6XXX Amplifier Evaluation Board 1.
* Test Points
VDD
0.1 µF
RR1
20 kΩ
CR1
RR2
20 kΩ
UR1
*
CR2
0.1 µF
JP2
C
R5
R6
D
No
Jumper
C4
VDD
0.1 µF
VREF
CU1
C2
Power Supply
*
R4
VDD
CP1
1.0 µF
DP1
R1
R2
U1
R3
C1
C3
RISO
*
GND
VL
R7
CL
RL
GND
*
C5
*
A
*
JP1
VIN
B
FIGURE 2-11:
Voltage Amplifier Example Supported by the MCP6XXX Amplifier
Evaluation Board 1.
© 2007 Microchip Technology Inc.
DS51667A-page 13
MCP6XXX Amplifier Evaluation Board 1 User’s Guide
2.3.1.7
INVERTING COMPARATOR
• Compares the input voltage to another (reference) voltage and forces the output
to one of two digital states. Input signal is applied to the inverting input. The
comparison includes a user selected amount of hysteresis. Input and output
voltages are shifted by a reference for single supply
• The Mindi™ Amplifier Designer gives design recommendations for the inverting
comparator circuit; see the circuit diagram shown in Figure 2-12
- Fill the sockets with the recommended resistors and capacitors
- Set JP1 and JP2 in the correct positions
(for the given example, JP1: Position B, JP2: Position C)
Note: The MCP6XXX Amplifier Evaluation Board 1 currently only supports the inverting
comparator with center trip point = 2.5V.
VS
VDD
R6
VR R5
Mid-supply
Reference
Power
Supply
CU1
R1
VIN
Output
Load
U1 V
OUT
VL
C5
FIGURE 2-12:
Inverting Comparator Circuit Diagram.
Figure 2-13 shows an example of the inverting comparator circuit diagram supported
by MCP6XXX Amplifier Evaluation Board 1.
* Test Points
VDD
0.1 µF
RR1
20 kΩ
CR1
CR2
0.1 µF
RR2
20 kΩ
JP2
C
UR1
R5
R6
D
C4
VDD
*
0.1 µF
VREF
CU1
C2
Power Supply
*
R4
VDD
CP1
1.0 µF
DP1
R1
R2
U1
R3
C1
C3
RISO
*
GND
VL
R7
CL
RL
GND
*
C5
*
A
*
JP1
VIN
B
FIGURE 2-13:
Inverting Comparator Example Supported by the MCP6XXX
Amplifier Evaluation Board 1.
DS51667A-page 14
© 2007 Microchip Technology Inc.
Installation and Operation
2.3.1.8
NON-INVERTING COMPARATOR (NOT CURRENTLY SUPPORTED)
• Compares the input voltage to another (reference) voltage and forces the output
to one of two digital states. Input signal is applied to the non-inverting input. The
comparison includes a user selected amount of hysteresis. Input and output voltages are shifted by a reference for single supply
• The Mindi™ Amplifier Designer gives design recommendations for the non-inverting comparator circuit; see the circuit diagram shown in Figure 2-14
- 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 D)
Note: The MCP6XXX Amplifier Evaluation Board 1 currently only supports the
non-inverting comparator with center trip point = 2.5V.
VS
VDD
R4
VIN
Power
Supply
R6
C4
CU1
Mid-supply
Reference
FIGURE 2-14:
VR
U1 VOUT
Output
Load
VL
R2
Non-Inverting Comparator Circuit Diagram.
Figure 2-15 shows an example of the non-inverting comparator circuit diagram
supported by the MCP6XXX Amplifier Evaluation Board 1.
* Test Points
VDD
0.1 µF
RR1
20 kΩ
CR1
CR2
0.1 µF
RR2
20 kΩ
JP2
C
UR1
R5
R6
D
C4
VDD
*
0.1 µF
VREF
CU1
C2
Power Supply
*
R4
VDD
CP1
1.0 µF
DP1
U1
R1
R2
R3
C1
C3
RISO
*
GND
VL
R7
CL
RL
GND
*
C5
*
A
*
JP1
VIN
B
FIGURE 2-15:
Non-Inverting Comparator Example Supported by the MCP6XXX
Amplifier Evaluation Board 1.
© 2007 Microchip Technology Inc.
DS51667A-page 15
MCP6XXX Amplifier Evaluation Board 1 User’s Guide
2.3.1.9
INVERTING DIFFERENTIATOR (NOT CURRENTLY SUPPORTED)
• Differentiates and inverts a voltage with a differentiating frequency. Additional
components(R1, C3) achieve stabilization and noise. Input and output voltages
are shifted by a reference for single supply
• The Mindi™ Amplifier Designer gives design recommendations for the inverting
differentiator circuit; see the circuit diagram shown in Figure 2-16
- Fill the sockets with the recommended resistors and capacitors
- Set JP1 and JP2 in the correct positions
(for the given example, JP1: Position B, JP2: Position C)
VS
VDD
CU1
VR R5
Mid-supply
Reference
Power
Supply
VOUT
U1
C1
VL
R3
VIN
C3
R1
FIGURE 2-16:
Output
Load
Inverting Differentiator Circuit Diagram.
Figure 2-17 shows an example of the inverting differentiator circuit diagram supported
by MCP6XXX Amplifier Evaluation Board 1.
* Test Points
VDD
0.1 µF
RR1
20 kΩ
CR1
CR2
0.1 µF
RR2
20 kΩ
JP2
C
UR1
R5
R6
D
C4
VDD
*
0.1 µF
VREF
CU1
C2
Power Supply
*
R4
VDD
CP1
1.0 µF
DP1
U1
R1
R2
R3
C1
C3
RISO
*
GND
VL
R7
CL
RL
GND
*
C5
*
A
*
JP1
VIN
B
FIGURE 2-17:
Inverting Differentiator Example Supported by the MCP6XXX
Amplifier Evaluation Board 1.
DS51667A-page 16
© 2007 Microchip Technology Inc.
Installation and Operation
2.3.1.10
NON-INVERTING DIFFERENTIATOR (NOT CURRENTLY SUPPORTED)
• Differentiates and inverts a voltage with a differentiating frequency. Additional
components(R7, C3) achieve stabilization and noise. Input and output voltages
are shifted by a reference for single supply
• The Mindi™ Amplifier Designer gives design recommendations for the non-inverting differentiator circuit; see the circuit diagram shown in Figure 2-18
- 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)
Note: The MCP6XXX Amplifier Evaluation Board 1 currently only supports the
non-inverting differentiator with center trip point = 2.5V.
VS
VDD
Power
Supply
CU1
C2
VIN
VOUT
R5
Mid-supply
Reference
VL
VR
C1
R7
FIGURE 2-18:
Output
Load
U1
R3
C3
Non-Inverting Differentiator Circuit Diagram.
Figure 2-19 shows an example of the non-inverting differentiator circuit diagram
supported by MCP6XXX Amplifier Evaluation Board 1.
* Test Points
VDD
0.1 µF
RR1
20 kΩ
CR1
CR2
0.1 µF
RR2
20 kΩ
JP2
C
UR1
R5
R6
D
C4
VDD
*
0.1 µF
VREF
CU1
C2
Power Supply
*
R4
VDD
CP1
1.0 µF
DP1
R1
R2
U1
R3
C1
C3
RISO
*
GND
VL
R7
CL
RL
GND
*
C5
*
A
*
JP1
VIN
B
FIGURE 2-19:
Non-Inverting Differentiator Example Supported by the
MCP6XXX Amplifier Evaluation Board 1.
© 2007 Microchip Technology Inc.
DS51667A-page 17
MCP6XXX Amplifier Evaluation Board 1 User’s Guide
2.4
MCP6XXX AMPLIFIER EVALUATION BOARD 1 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; it was designed in Mindi™ Amplifier Designer.
This amplifier is described as follows:
•
•
•
•
FIGURE 2-20:
DS51667A-page 18
Non-Inverting Amplifier (Single Supply Configuration)
Power Supply Voltage is 5.0V
Desired Closed Loop Gain is 2 V/V
Load Capacitance is 56 pF
Non-Inverting Amplifier Designed In Mindi™ Amplifier Designer.
© 2007 Microchip Technology Inc.
Installation and Operation
Figure 2-21 shows the same circuit redrawn to emphasize the non-inverting amplifier.
VS
VDD
Power
Supply
CU1
R4
VIN
VOUT
U1
Mid-supply
Reference
Output
Load
VL
VR
R3
R2
FIGURE 2-21:
Non-Inverting Amplifier Circuit Diagram Supported by the
MCP6XXX Amplifier Evaluation Board 1 Kit.
Each of the components in Figure 2-21 that needs to be inserted in a socket on the
MCP6XXX Amplifier Evaluation Board 1 is listed in Table 2-1 and Table 2-2.
TABLE 2-1:
AMPLIFIER COMPONENTS LIST
PCB Labels
R2
© 2007 Microchip Technology Inc.
1.98 kΩ
R3
1.98 kΩ
R4
988Ω
RISO
TABLE 2-2:
Component Values
0Ω
RL
3.97 kΩ
CL
56 pF
U1
MCP6021, PDIP-8, 10 MHz
JUMPER POSITIONS
Jumper
Position
JP1
A
JP2
D
DS51667A-page 19
MCP6XXX Amplifier Evaluation Board 1 User’s Guide
Figure 2-22 shows the fully assembled MCP6XXX Amplifier Evaluation Board 1 for the
non-inverting amplifier.
* Test Points
VDD
0.1 µF
RR1
20 kΩ
CR1
CR2
0.1 µF
RR2
20 kΩ
JP2
C
UR1
R5
D
R6
C4
VDD
*
0.1 µF
VREF
CU1
C2
Power Supply
*
R4
U1
R3
VDD
CP1
1.0 µF
DP1
R1
R2
C1
C3
GND
*
RISO
CL
R7
RL
VL
GND
*
C5
*
A
*
JP1
VIN
B
FIGURE 2-22:
Fully Assembled Non-Inverting Amplifier Supported by the
MCP6XXX Amplifier Evaluation Board 1.
The fully assembled MCP6XXX Amplifier Evaluation Board 1 top view is shown in
Figure 2-23.
JP2 = D
R4
R2 & R3
RISO
JP1 = A
CL
RL
FIGURE 2-23:
Picture of the Non-Inverting Amplifier Supported by the
MCP6XXX Amplifier Evaluation Board 1.
DS51667A-page 20
© 2007 Microchip Technology Inc.
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 2-24 shows the test points to
check.
VREF
Test Point
VDD
Test Point
GND
Test Point
VIN
Test Point
VL
Test Point
FIGURE 2-24:
© 2007 Microchip Technology Inc.
GND
Test Point
Checking the Test Points.
DS51667A-page 21
MCP6XXX Amplifier Evaluation Board 1 User’s Guide
2.4.2.2
TRANSIENT RESPONSES
This non-inverting 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
Step Response
In Bench Measurement:
• Set VIN with a step amplitude of 2.0V and a center voltage of 2.5V. (i.e. VIN starts
1.0V below center and ends 1.0V above center.
• The measured step response is shown in Figure 2-25. It is a signal with a step
amplitude of 4.0V and an center voltage of 2.5V. (i.e. VOUT starts 2.0V below
center and ends 2.0V above center.
Note:
The center voltage of VIN is set at VREF =VDD/2 (For VDD = 5.0V,
VREF = 2.5V)
VOUT = 4.5V
VIN = 3.5V
VREF = 2.5V
FIGURE 2-25:
DS51667A-page 22
Measured Step Response.
© 2007 Microchip Technology Inc.
Installation and Operation
In Mindi™ Amplifier Designer:
• Set VIN with a step amplitude of 2.0V and a center voltage of 2.5V.
(i.e. starts 1V below center and ends 1V above center)
• The simulated step response is shown in Figure 2-26. It is a signal with a step
amplitude of 4.0V and an 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 = 4.5V
VIN = 3.5V
VREF = 2.5V
FIGURE 2-26:
© 2007 Microchip Technology Inc.
Simulated Step Response.
DS51667A-page 23
MCP6XXX Amplifier Evaluation Board 1 User’s Guide
2.4.2.2.2
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
2.0V and a center voltage of 2.5V
• The measured sine wave response is shown in Figure 2-27. It is a sine wave
signal with a frequency of 100.0 Hz, a peak-to-peak voltage of 4.0V 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
VREF
VIN
FIGURE 2-27:
DS51667A-page 24
Measured Sine Wave Response.
© 2007 Microchip Technology Inc.
Installation and Operation
In Mindi™ Amplifier Designer:
• Set VIN as a sine wave with a frequency of 100.0 Hz, a peak-to-peak voltage of
2.0V and a center voltage of 2.5V
• The simulated sine wave response is shown in Figure 2-28. It is a sine wave
signal with a frequency of 100.0 Hz, a peak-to-peak voltage of 4.0V 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
VREF
VIN
FIGURE 2-28:
© 2007 Microchip Technology Inc.
Simulated Sine Wave Response.
DS51667A-page 25
MCP6XXX Amplifier Evaluation Board 1 User’s Guide
2.4.3
Amplifier Modification: 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 1,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 2-29 shows a SOIC-8 op amp soldered onto the MCP6XXX Amplifier Evaluation
Board 1.
FIGURE 2-29:
Op Amp in SOIC-8 package soldered onto the MCP6XXX
Amplifier Evaluation Board 1.
Figure 2-30 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 2-31 shows the SOIC8EV board plugged into the MCP6XXX Amplifier
Evaluation Board 1.
Note:
DS51667A-page 26
Insert the interconnect strips into the DIP-8 socket on the MCP6XXX
Amplifier Evaluation Board 1. 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.
Installation and Operation
(Front View)
FIGURE 2-30:
(Back View)
Op Amp in SOIC-8 Package Soldered onto a Separate Board.
FIGURE 2-31:
Connecting Adaptor Board onto the MCP6XXX Amplifier
Evaluation Board 1.
© 2007 Microchip Technology Inc.
DS51667A-page 27
MCP6XXX Amplifier Evaluation Board 1 User’s Guide
NOTES:
DS51667A-page 28
© 2007 Microchip Technology Inc.
MCP6XXX AMPLIFIER EVALUATION
BOARD 1 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 1:
•
•
•
•
Board – Schematic
Board – Top Silk Layer
Board – Top Metal Layer
Board – Bottom Metal Layer
© 2007 Microchip Technology Inc.
DS51667A-page 29
MCP6XXX Amplifier Evaluation Board 1 User’s Guide
BOARD - SCHEMATIC
M
A.2
1
3
DS51667A-page 30
© 2007 Microchip Technology Inc.
Schematic and Layouts
A.3
BOARD - TOP SILK LAYER
© 2007 Microchip Technology Inc.
DS51667A-page 31
MCP6XXX Amplifier Evaluation Board 1 User’s Guide
A.4
BOARD - TOP METAL LAYER
DS51667A-page 32
© 2007 Microchip Technology Inc.
Schematic and Layouts
A.5
BOARD - BOTTOM METAL LAYER
© 2007 Microchip Technology Inc.
DS51667A-page 33
MCP6XXX Amplifier Evaluation Board 1 User’s Guide
NOTES:
DS51667A-page 34
© 2007 Microchip Technology Inc.
MCP6XXX AMPLIFIER EVALUATION
BOARD 1 USER’S GUIDE
Appendix B. Bill Of Materials (BOM)
B.1
MCP6XXX AMPLIFIER EVALUATION BOARD 1 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 (102-00147R1) (NOTE 1)
Reference
Description
Manufacturer
Part Number
1
CP1
CAP CERAMIC 1UF 10% 25V
X5R 0805
Panasonic® - ECG
ECJ-2FB1E105K
4
CR1, CR2, CU1,
CU2
CAP CERAMIC .1UF 10% 25V
X7R 0805
Panasonic - ECG
ECJ-2VB1E104K
1
DP1
DIODE ZENER 6.2V 350MW
SOT-23
Fairchild Semiconductor
BZX84C6V2
4
EA Corner
BUMPER CLEAR
.375X.15"DOME
Richco Plastic Co
RBS-12
2
J1, J2
CONN HEADR BRKWAY .100
04POS STR
Tyco Electronics/Amp
9-146258-0-02
1
PCB
RoHS Compliant Bare PCB,
MCP6XXX Amplifier Evaluation
Board 1
—
104-00147
30
Pin Socket
PIN RECPT .015/.025 DIA 0667
SER
Mill-Max®
0667-0-15-01-30-27-10-0
2
RR1, RR2
RES 20.0K OHM 1/8W 1% 0805 Panasonic - ECG
SMD
ERJ-6ENF2002V
2
Shunts for J1&J2
SOCKET,SHORT BLKS W TAB
BLK
JAMECO VALUEPRO
2012JH-R
6
Test Points
PC TEST POINT COMPACT
SMT
Keystone Electronics
5016
1
UR1
MCP6021 SOT-23-5 Single Op
Amp
Microchip Technology Inc. MCP6021T-E/OT
1
U1 Socket
CONN IC SOCKET 8POS DIP
TIN
Tyco Electronics/Amp
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.
DS51667A-page 35
Bill Of Materials (BOM)
TABLE B-2:
Qty
BILL OF MATERIALS – UNPOPULATED PARTS (102-00147R1)
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, capacitorys, jumpers
and MCP6021 op amps that come in the Accessory Bag which is shipped in the
MCP6XXX Amplifier Evaluation Board 1 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 (102-00147R1)
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 976 OHM 1/4W 1% METAL Yageo Corporation
FILM
MFR-25FBF-976R
1
Accessory Bag
RES 3.92K OHM 1/4W 1%
METAL FILM
Yageo Corporation
MFR-25FBF-3K92
2
Accessory Bag
RES 1.96K OHM 1/4W 1%
METAL FILM
Yageo Corporation
MFR-25FBF-1K96
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.
© 2007 Microchip Technology Inc.
DS51667A-page 36
Bill Of Materials (BOM)
NOTES:
© 2007 Microchip Technology Inc.
DS51667A-page 37
WORLDWIDE SALES AND SERVICE
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Tel: 886-2-2500-6610
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Tel: 86-27-5980-5300
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Tel: 66-2-694-1351
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Tel: 39-0331-742611
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Tel: 31-416-690399
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Tel: 34-91-708-08-90
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Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
06/25/07
DS51667A-page 38
Draft
© 2007 Microchip Technology Inc.