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MCP6N16 Evaluation Board User’s Guide

DS50002365A-page 26

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2015 Microchip Technology Inc.

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Summary of Contents for MCP6N16

Page 1: ... 2015 Microchip Technology Inc DS50002365A MCP6N16 Evaluation Board User s Guide ...

Page 2: ... Microchip s code protection feature may be a violation of the Digital Millennium Copyright Act If such acts allow unauthorized access to your software or other copyrighted work you may have a right to sue for relief under that Act Microchip received ISO TS 16949 2009 certification for its worldwide headquarters design and wafer fabrication facilities in Chandler and Tempe Arizona Gresham Oregon a...

Page 3: ... 2015 Microchip Technology Inc DS50002365A page 3 Object of Declaration MCP6N16 Evaluation Board ...

Page 4: ...DS50002365A page 4 2015 Microchip Technology Inc NOTES ...

Page 5: ...ation Amplifier 12 1 3 4 VREF 12 1 3 5 Power Supply Connector 12 1 4 What Does This Kit Contain 13 Chapter 2 Installation and Operation 2 1 Introduction 15 2 2 Required Tools 15 2 2 1 Bench Setup 15 2 3 Basic Configurations 16 2 3 1 Out of the Box Setup 16 2 3 2 Test Points 16 2 3 3 Jumper Settings 17 2 4 Detailed Circuit Descriptions 18 2 4 1 Power Supply 18 2 4 2 Sensor Connection 19 2 4 3 Instr...

Page 6: ...Guide DS50002365A page 6 2015 Microchip Technology Inc A 5 Board Top Copper 30 A 6 Board Bottom Copper 30 A 7 Board Bottom Copper and Silk 31 A 8 Board Bottom Silk 31 Appendix B Bill of Materials BOM 33 Worldwide Sales and Service 36 ...

Page 7: ...ws the schematic and board lay outs for the MCP6N16 Evaluation Board Appendix B Bill of Materials BOM Lists the parts used to populate the MCP6N16 Evaluation Board Also lists alternate components 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 desc...

Page 8: ... dialog button Click OK A tab Click the Power tab N Rnnnn A number in verilog format where N is the total number of digits R is the radix and n is a digit 4 b0010 2 hF1 Text in angle brackets A key on the keyboard Press Enter F1 Courier New font Plain Courier New Sample source code define START Filenames autoexec bat File paths c mcc18 h Keywords _asm _endasm static Command line options Opa Opa Bi...

Page 9: ...m 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 Su...

Page 10: ...Preface 2015 Microchip Technology Inc DS50002365A page 10 NOTES ...

Page 11: ...chip Technology s MCP6N16 Zero Drift instrumentation amplifier INA The fully assembled evaluation board includes differential input filtering two jumper selectable gain settings and output filtering in addition to an external voltage reference circuit to allow for an adjustable output common mode level shifting 1 3 DESCRIPTION 1 3 1 Block Diagram Figure 1 1 shows the overall functionality of this ...

Page 12: ...nput filter provides a low pass function for both common mode CM and differential mode DM signals They are fast enough to follow supply variations and to let the MCP6N16 reject CM mains noise e g harmonics of 50 or 60 Hz In its default setting it is set to a gain of 101V V using jumper J9 it can be reconfigured for gain of 301V V The output filter provides a low pass function for both CM and DM si...

Page 13: ...crochip Technology Inc DS50002365A page 13 FIGURE 1 3 MCP6N16 Evaluation Board Bottom View 1 4 WHAT DOES THIS KIT CONTAIN The MCP6N16 Evaluation Board kit includes MCP6N16 Evaluation Board ADM00640 Important Information Sheet ...

Page 14: ...MCP6N16 Evaluation Board User s Guide DS50002365A page 14 2015 Microchip Technology Inc NOTES ...

Page 15: ...e following equipment and tools are required MCP6N16 Evaluation Board Lab DC Power Supply with single output Generates 5 0V typical J2 3 VDUT and ground GND J2 1 Voltmeter Multimeter Signal Generator to simulate a low level sensor signal or a suitable sensor Oscilloscope with high impedance probe MΩ Optional Signal Analyzer network analyzer spectrum analyzer etc High input impedance 1 MΩ FIGURE 2 ...

Page 16: ...t TP5 with a voltmeter it is suggested to set this to 2 5V adjust with R23 if necessary to level shift the output of the MCP6N16 centered between the supply rails 4 Connect an oscilloscope to the output at either TP1 VOUT or J7 and observe the output signal of the MCP6N16 2 3 2 Test Points Table 2 1 lists the test points and describes their functionality TABLE 2 1 TEST POINTS Test Point Comments R...

Page 17: ...r May be used for diagnostic purposes J8 3 3V ext 1 2 Open Use only when power will be supplied by the PIC microcontroller attached through J12 Not needed for stand alone bench operation J9 Gain Select 1 2 Closed Configures the MCP6N16 for a gain of 101V V 2 3 Open Configures the MCP6N16 for a gain of 301V V J10 VCM 1 2 Closed Connects the external VCM from J2 to the signal inputs through R13 and ...

Page 18: ...C microcontroller Jumper 8 is needed to make this connection while any external lab supplies must be disconnected from the power connector J2 In addition to connecting the supply voltages pin 2 of terminal J2 can be used to apply an external common mode voltage VCM for biasing the inputs of the instrumentation amplifier MCP6N16 see Figure 2 2 Further details on this function can be found in Sectio...

Page 19: ...ing the supply voltage VDUT to VB typically 5 0V Resistor R1 and R17 allow for any additional series resistance to be added into the sensor excitation lines An additional option for providing excitation is through the DAC1 line by using an external supply e g current source or stimulus For this jumper J3 needs to be adjusted accordingly Another option for the user is to superimpose an AC signal th...

Page 20: ...The MCP6N16 is a zero drift instrumentation amplifier designed for single supply operation with rail to rail input no common mode crossover distortion and output performance Its design is based on a current feedback architecture which allows for the output voltage to be independently set regardless of the input common mode voltage The gain of the instrumentation amplifier is set by two external re...

Page 21: ...ential mode filters which will limit the input signal bandwidth according to Equation 2 1 EQUATION 2 1 Note that capacitors C6 and C9 have been selected with a lower tolerance of 5 instead of the typical 10 to improve time constant matching between R7C6 and R10C9 and consequently limit the CMRR degradation caused by such mismatches The 3 dB frequency for these filters is about 8 kHz The MCP6N16 10...

Page 22: ...al nature of the sensor input signal and its bandwidth is known the filter poles can be adjusted to limit further the noise bandwidth and to optimize the interface to an A D converter that may follow FIGURE 2 7 Instrumentation Amplifier MCP6N16 Signal Path Circuitry 20 30 40 50 60 70 80 90 100 110 1 10 100 1000 Differential Gain V V f Hz 10R R2 1 2 3 J10 IN 3 2 IN OUT 7 VSS 4 VDD 8 IN IN OUT VSS V...

Page 23: ...dditional load resistance into account according to Equation 2 5 EQUATION 2 5 Capacitor C11 in combination with R16 can be added to the feedback network to form an additional low pass filter of approximately 800 Hz with C11 0 01 µF This may be used as an alternate filter option instead of the common differential mode RC filter at the output of the MCP6N16 consisting of R8 R19 C8 C10 C12 TABLE 2 3 ...

Page 24: ...to the MCP6N16 data sheet for further details The MCP1525 U2 is a precision low power voltage reference with an output voltage of 2 5V Resistor R23 is a 25 turn potentiometer that is used to provide an adjustment range of 0 025V to 3 0V at the output of the reference buffer U4 The buffer amplifier uses the MCP6V11 a zero drift micro power operational amplifier that is configured for a gain of 1 2V...

Page 25: ...t for Intelligent Integrated Analog User s Guide DS50002172 and AN1607 Application Note PIC24FJ128GC010 Analog Design Guide DS00001607 The 40 pin dual row header J12 connects to various nodes of the MCP6N16 circuit and places them in one convenient place In order to utilize this interface the user will need to select the desired microcontroller and design the necessary interface hardware and softw...

Page 26: ...MCP6N16 Evaluation Board User s Guide DS50002365A page 26 2015 Microchip Technology Inc NOTES ...

Page 27: ...27 Appendix A Schematic and Layouts A 1 INTRODUCTION This appendix contains the following schematics and layouts for the MCP6N16 Evaluation Board Board SchematiC Board Top Silk Board Top Copper and Silk Board Top Copper Board Bottom Copper Board Bottom Copper and Silk Board Bottom Silk ...

Page 28: ... IN Vout2 CH0 IN 200k R22 1 1 2 3 J3 1k R5 10k R21 10k R25 0 1uF C14 0 01uF C13 0 01uF C19 GND Sense Sense Sense Sense DAC1 0R R1 0R R17 VDD 1 VSS 2 SDA 4 SCL 3 5 6 A W B 10K U3 MCP4018 GND I2C_DIO I2C_SCLK 2 7V to 5 5V W W ADC1 1 8V to 5 5V 1 2 J8 Switched 3 3VDD from Motherboard 0R R20 GND 1 2 3 4 5 6 J6 0R R6 0R R9 R6 R9 for AC coupled inputs replace with 0 1uF ca ps High Enabled Low Disabled s...

Page 29: ...Schematic and Layouts 2015 Microchip Technology Inc DS50002365A page 29 A 3 BOARD TOP SILK A 4 BOARD TOP COPPER AND SILK ...

Page 30: ...MCP6N16 Evaluation Board User s Guide DS50002365A page 30 2015 Microchip Technology Inc A 5 BOARD TOP COPPER A 6 BOARD BOTTOM COPPER ...

Page 31: ...Schematic and Layouts 2015 Microchip Technology Inc DS50002365A page 31 A 7 BOARD BOTTOM COPPER AND SILK A 8 BOARD BOTTOM SILK ...

Page 32: ...MCP6N16 Evaluation Board User s Guide DS50002365A page 32 2015 Microchip Technology Inc NOTES ...

Page 33: ...MD 0805 NIC Components NMC0805X7R105K10TRPF 2 D1 D2 Diode LED green 2 1V 20 mA 6 mcd Diffuse SMD 0805 CML Technologies GmbH Co KG 7012X5 1 FB1 Ferrite 500 mA 220R SMD 0603 Murata Electronics BLM18AG221SN1D 3 J1 J4 J8 Conn Hdr 2 54 male 1x2 gold 5 84 MH TH vert FCI 77311 118 02LF 1 J2 Conn terminal 5 mm 10A female 1x4 TH R A PHOENIX CONTACT 1729034 5 J3 J9 J10 J11 J13 Conn Hdr 2 54 male 1x3 gold 5 ...

Page 34: ... mW TH 3296W Murata Electronics PV36W103C01B00 1 TP2 Conn TP tab silver mini 3 8x2 03 SMD Keystone Electronics 5019 1 U1 Zero Drift instr amplifier GMIN 100 MSOP 8 Microchip Technology Inc MCP6N16 100E MS 1 U2 2 5V Precision voltage reference SOT23 5 Microchip Technology Inc MCP1525T I TT 1 U3 Digital potentiometer 1 ch 10 kΩ SC70 6 Microchip Technology Inc MCP4018T 103E LT 1 U4 Zero Drift 80 kHz ...

Page 35: ...Bill of Materials BOM 2015 Microchip Technology Inc DS50002365A page 35 NOTES ...

Page 36: ... 86 24 2334 2829 Fax 86 24 2334 2393 China Shenzhen Tel 86 755 8864 2200 Fax 86 755 8203 1760 China Wuhan Tel 86 27 5980 5300 Fax 86 27 5980 5118 China Xian Tel 86 29 8833 7252 Fax 86 29 8833 7256 ASIA PACIFIC China Xiamen Tel 86 592 2388138 Fax 86 592 2388130 China Zhuhai Tel 86 756 3210040 Fax 86 756 3210049 India Bangalore Tel 91 80 3090 4444 Fax 91 80 3090 4123 India New Delhi Tel 91 11 4160 8...

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