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Summary of Contents for Microchip Technology Photodiode PGA PICtail
- Page 1 Photodiode PGA PICtail™ Daughter Board User’s Guide 2004 Microchip Technology Inc. DS51514A...
- Page 2 PowerTool, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies.
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Page 3: Table Of Contents
Board - Top Silk Screen And Metal Layers ........... 20 Board - Top Metal Layer ............... 21 Board - Bottom Metal Layer ..............22 Appendix B. Bill-Of-Materials (BOM) ................. 23 Worldwide Sales and Service ..................24 2004 Microchip Technology Inc. DS51514A-page iii... - Page 4 Photodiode PGA PICtail™ Daughter Board User’s Guide NOTES: 2004 Microchip Technology Inc. DS51514A-page iv...
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Page 5: Preface
This chapter contains general information that will be useful to know before using the Photodiode PGA PICtail™ Daughter Board. Items discussed in this chapter include: • About this guide • Recommended Reading • The Microchip Web Site • Customer Support 2004 Microchip Technology Inc. DS51514A-page 1... -
Page 6: About This Guide
Signal Analysis PC Application and setting up the board to stand on its own. • Appendix A: Photodiode PGA PICtail Daughter Board Hardware – Gives detailed information on the Photodiode PGA PICtail Daughter Board. Includes detailed circuit explanation, schematic, board layouts and Bill-of-Materials (BOM) 2004 Microchip Technology Inc. DS51514A-page 2... -
Page 7: Conventions Used In This Guide
Curly brackets and pipe Choice of mutually exclusive errorlevel {0|1} character: { | } arguments; an OR selection Ellipses... Replaces repeated text var_name [, var_name...] Represents code supplied by void main (void) user { ... 2004 Microchip Technology Inc. DS51514A-page 3... -
Page 8: Recommended Reading
Gives detailed information on the PICmicro microcontroller used on the Signal Analysis PICtail Daughter Board. PIC16C745/765 Data Sheet (DS41124) Gives detailed information on the PICmicro microcontroller used on the PICkit 1 Flash Starter Kit. 2004 Microchip Technology Inc. DS51514A-page 4... -
Page 9: The Microchip Web Site
Microchip's development systems software products. This line also provides information on how customers can receive currently available upgrade kits. The Development Systems Information Line numbers are: 1-800-755-2345 – United States and most of Canada 1-480-792-7302 – Other International Locations 2004 Microchip Technology Inc. DS51514A-page 5... - Page 10 Photodiode PGA PICtail™ Daughter Board User’s Guide NOTES: 2004 Microchip Technology Inc. DS51514A-page 6...
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Page 11: Chapter 1. Overview
). Board power is applied at the +5V and GND inputs. The SPI™ bus makes it possible to control the PGA; its gain and input channel can be set as desired from the software. 2004 Microchip Technology Inc. DS51514A-page 7... -
Page 12: Associated Tools
Software PICkit™ 1 Signal Analysis PC Program PICkit™ 1 PICkit™ 1 Firmware Flash Starter Kit PICA2Dlab.hex Signal Analysis Firmware PICtail™ Daughter Board Photodiode PGA PICtail™l Daughter Board FIGURE 1-2: Measurement Set-up Block Diagram. 2004 Microchip Technology Inc. DS51514A-page 8... - Page 13 SPI bus to the PGA. 1.4.7 Interface Details A more detailed look at how the Photodiode PGA PICtail™ Daughter Board interfaces with the other boards is shown in Figure 1-3. 2004 Microchip Technology Inc. DS51514A-page 9...
- Page 14 Light Photodiode Serial Test Point EEPROM Op Amp MCP6001U Test Point SPI™ Bus CH0 Input Test Point PIC16F684 PIC16F745 to PC SPI Bus CH1 Input MCP6S22 Test Point FIGURE 1-3: Detailed Interface Diagram. 2004 Microchip Technology Inc. DS51514A-page 10...
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Page 15: Chapter 2. Setup And Installation
PICtail™ Daughter Board Signal Analysis PICtail™ Daughter Board USB Cable Expansion Header (J3) ® Remove PICmicro from Evaluation Socket PICkit 1™ Flash Starter Kit PIC16C745 Firmware Version 2.0.2 or later FIGURE 2-1: Board Connections. 2004 Microchip Technology Inc. DS51514A-page 11... - Page 16 Photodiode PGA PICtail™ Daughter Board. 5. Move the photodiode close to a light source, such as a desk lamp, and verify that the strip-chart changes with light intensity (e.g., Figure 2-2). FIGURE 2-2: Strip Chart. 2004 Microchip Technology Inc. DS51514A-page 12...
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Page 17: Chapter 3. Operation
Analysis PICtail Daughter Board User’s Guide” (DS51476) for details on displaying measured results. The possible formats include: oscilloscope, FFT, histogram and strip-chart. The measured results can then be interpreted as illuminance; see AN951, “Amplifying High Impedance Sensors – Photodiode Example” (DS00951). 2004 Microchip Technology Inc. DS51514A-page 13... - Page 18 (Figure 3-2, #8) 3. Select Channel 2. Select PGA 1. Open PGA Window 5. Select Operation 8. Execute 6. Set Register Pointer 4. Select Gain 7. Set Input Channel FIGURE 3-2: PGA Configuration. 2004 Microchip Technology Inc. DS51514A-page 14...
- Page 19 This window starts at the power-on default conditions for the ADC; therefore, it must be configured before use. See the PIC16F684 data sheet (DS41202) for more information on configuring the registers. 2. ADC Window 1. Select ADC window FIGURE 3-4: Manual ADC Configuration. 2004 Microchip Technology Inc. DS51514A-page 15...
- Page 20 The SPI bus needs to be connected to a microcontroller with the appropriate firmware. The MCP6S22 PGA powers up to input CH0 and 1 V/V gain. The MCP6S92 needs to be initialized after power-up. 2004 Microchip Technology Inc. DS51514A-page 16...
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Page 21: Appendix A. Schematic And Layouts
Silk-Screen And Metal Layers”, A.6 “Board - Top Metal Layer”, A.7 “Board - Bot- tom Metal Layer” and Appendix B. Bill-Of-Materials (BOM). The Gerber files for this board are available on the Microchip web site (www.microchip.com) and are contained in the zip file 00951.zip. 2004 Microchip Technology Inc. DS51514A-page 17... -
Page 22: Additional Comments
PGA. High-frequency design practices are used to minimize digital interference: • Solid ground plane • Surface-mount devices • Separate digital and analog lines and sections • Straight and short lines to the PGA 2004 Microchip Technology Inc. DS51514A-page 18... -
Page 23: Board Schematic
BOARD SCHEMATIC 2004 Microchip Technology Inc. DS51514A-page 19... -
Page 24: Board - Top Silk Screen And Metal Layers
Photodiode PGA PICtail™ Daughter Board User’s Guide BOARD - TOP SILK-SCREEN AND METAL LAYERS 2004 Microchip Technology Inc. DS51514A-page 20... -
Page 25: Board - Top Metal Layer
BOARD - TOP METAL LAYER 2004 Microchip Technology Inc. DS51514A-page 21... -
Page 26: Board - Bottom Metal Layer
Photodiode PGA PICtail™ Daughter Board User’s Guide BOARD - BOTTOM METAL LAYER 2004 Microchip Technology Inc. DS51514A-page 22... -
Page 27: Appendix B. Bill-Of-Materials (Bom)
110-93-308-41-001 Manufacturing Corp. Bare Printed Circuit Board — — Note 1: Either PGA will work in this application. The board comes with a MCP6S22 installed. A MCP6S92 comes in the anti-static parts bag. 2004 Microchip Technology Inc. DS51514A-page 23... -
Page 28: Worldwide Sales And Service
Fax: 86-532-502-7205 Tel: 765-864-8360 Fax: 765-864-8387 Los Angeles Mission Viejo, CA Tel: 949-462-9523 Fax: 949-462-9608 San Jose Mountain View, CA Tel: 650-215-1444 Fax: 650-961-0286 Toronto Mississauga, Ontario, Canada Tel: 905-673-0699 Fax: 905-673-6509 09/27/04 2004 Microchip Technology Inc. DS51514A-page 24...
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