TB070 rfRXD0420 Receiver Module Author: The receiver module can be purchased separately or in packs of 5. See Table 1 Steven Bible Microchip Technology Inc. TABLE 1: INTRODUCTION The rfRXD0420 Receiver Module (see Figure 1) is a low cost, high performance UHF short-range radio ASK receiver design using the Microchip Technology rfRXD0420. FIGURE 1: rfRXD0420 RECEIVER MODULE RECEIVER MODULE ORDERING INFORMATION Order Number Frequency Single 5 Pack 315 MHz 433.92 MHz AC164104 AC164103 AC164106 AC164105 rfRXD0420 DESCRIPTION The rfRXD0420 is a stand-alone receiver module that can be used in a variety of ways. • It can be plugged into the PICkit™ 1 FLASH Starter Kit expansion header J3 for demonstration and development. • The receiver module can be installed in any project for proof-of-concept, demonstration, or development purposes. Once project proof-ofconcept and demonstration have been proven, the designer can use the available Gerber files or complete a design of their own. The module design is suitable for: • • • • A detailed description of the rfRXD0420 UHF ASK/ FSK/FM Receiver is provided in the data sheet, DS70090. Wireless remote command and control Remote Keyless Entry (RKE) Security systems Low power telemetry applications A detailed description of the rfRXD0420 receiver module design is provided in application note, AN860. The specifics of the receiver module design are: Table 2 lists the pinout for the rfRXD0420 receiver • Single channel, fixed frequency at 315 MHz and 433.92 MHz • ASK modulation • Signal rate: 4800 baud TABLE 2: Pin Schematics, PCB layout, and Bill-of-Materials (BOM) are provided in the following sections. Gerber files are available on the rfPIC™ Development Kit 1 CD-ROM. © 2003 Microchip Technology Inc. 1-10 11 12 13 14 ANT Preliminary rfRXD0420 RECEIVER MODULE PINOUT Description No Connection Receive Data In No Connection Power: 2.5-5.5 VDC Ground Antenna Connection TB070-page 1 TB070 The antenna connection is a 0.055 inch pin receptacle. A simple small diameter wire (AWG 24) antenna can be constructed and inserted into the receptacle. The length of the wire depends on the frequency. FIGURE 3: rfRXD0420 TOP COPPER FIGURE 4: rfRXD0420 BOTTOM COPPER λ (meters) = c / f (Hertz) where c = 3x108 = speed of light (meters per second) f = receive frequency (Hertz) λ = wavelength (meters) The length of the antenna wire in inches can be found for a given frequency using the following formula: wire antenna length (inches) = 2952.8 / f (MHz) Alternatively, the pin receptacle can be removed and an alternate antenna connection can be made. For example, a coaxial wire can be connected to the antenna pad on the front side of the PCB and ground pad on the back side of the PCB. PCB LAYOUT The following figures illustrate the various layers of the rfRXD0420 receiver module printed circuit board. FIGURE 2: TB070-page 2 rfRXD0420 TOP SILKSCREEN GERBER FILES Gerber Files for the rfRXD0420 are available on the rfPIC Developemnt Kit 1 CD-ROM. Preliminary © 2003 Microchip Technology Inc. © 2003 Microchip Technology Inc. Preliminary X1 Freq. 20.35625 MHz 26.45125 MHz Crystal X1 P1 To PICkit™ J3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Freq. 315 MHz 433.92 MHz C6 L1 C6 * 3.0 pF * L1 82 nH 33 nH 39 nH L2 82 nH 27 nH 39 nH RA5 RA4 RA3 RC5 RC4 RC3 RA0 RA1 RA2 RC0 RC1 RC2 Crystek P/N 016999 016985 L4 FB X1 C10 0Ω C19 330 pF +V R3 10 kΩ C11 1000 pF SAW Filter F1 6 1 Input GND Output GND 2 Input Output Case-GND 5 8 7 4 3 NOTE: Populate C10 (optional C Trim capacitor) with 0 ohm resistor ANT Freq. 315 MHz 433.92 MHz 433.92 MHz NOTES: 1. * = Not Placed 2. EPCOS B3551 (315 MHz) SAW filter is not pin compatable with the above SAW filters. Part No. B3751 B3550 B3750 L2 C14 330 pF C18 330 pF C7 * 3.0 pF * +V +V C7 L3 C15 25 26 27 28 29 30 31 32 +V 24 23 22 21 20 19 18 17 VSS RO VDD ENRX LF VSS IN_LNA VDD C3 330 pF R1 100 kΩ C17 C17 6.0 pF 6.0 pF 1 2 3 4 5 6 7 8 R5 470Ω R4 470Ω 16 NC 15 NC 14 13 12 11 10 9 C5 330 pF C2 47000 pF IN_DEM OUT_IFA VDD U1 rfRXD0420 FBC2 FBC1 IN_IFA VSS OUT_MIX2 LNA Tuned Circuit Freq. C15 L3 315 MHz 7.0 pF 22 nH 433.92 MHz 3.0 pF 15 nH +V C1 1800 pF NC NC OUTN OUTP VSS RSSI OAP OAN OUT_OA VDD +V +V Bandwidth 230 kHz RC1 C9 33000 pF C13 1000 pF muRata P/N SFECV10M7GA00 Ceramic IF Filter F2 C12 1000 pF Freq. 10.7 MHz C16 330 pF F2 10.7 MHz R2 390Ω C8 330 pF C4 330 pF R6 1 kΩ FIGURE 5: VSS GAIN_LNA OUT_LNA IN_MIX1 VSS IF1P IF1N VDD EPCOS SAW Filter F1 TB070 rfRXD0420 SCHEMATIC Figure 5 is a detailed schematic of the rfRXD0420 module. rfRXD0420 RECEIVER MODULE TB070-page 3 TB070-page 4 C6, C7 C15 - 433.92 MHz C17 C15 - 315 MHz C3, C4, C5, C8, C14, C16, C18, C19 C11, C12, C13 C1 C9 C2 C10 R2 R4, R5 R6 R3 R1 L3 - 315 MHz L3 - 433.92 MHz L1, L2 - 315 MHz L1, L2 - 433.92 MHz L4 P1 F1 - 315 MHz F1 - 433.92 MHz F2 X1 - 315 MHz X1 - 433.92 MHz U1 1 1 2 1 1 1 1 1 2 2 1 Preliminary 1 1 1 1 1 1 1 rfRXD0420 20.35625 MHz 26.451250 MHz 14-Pin Right Angle Header 600Z, 0603 22 nH, 0603 15 nH, 0603 82 nH, 0603 39 nH, 0603 0 ohm, 0603 390 ohm, 0603 470 ohm, 0603 1K ohm 10K ohm, 0603 100K ohm, 0603 Not Placed 3 pF, NP0, 0603 6 pF, NP0, 0603 7 pF, NP0, 0603 330 pF, X7R, 0603 1000 pF, X7R, 0603 1800 pF, X7R, 0603 33000 pF , X7R, 0603 47000 pF, X5R, 0603 Value Digi-Key Digi-Key Digi-Key Digi-Key Digi-Key Digi-Key Digi-Key Digi-Key Digi-Key Digi-Key Digi-Key Digi-Key Digi-Key Digi-Key Digi-Key Digi-Key Digi-Key Digi-Key Digi-Key Order From UHF ASK/FSK/FM Receiver Crystal, HC-49/S Crystal, HC-49/S SAW Filter - 315 MHz SAW Filter - 433.92 MHz 10.7 MHz Ceramic Filter, 230 kHz BW Microchip Crystek Crystek EPCOS EPCOS muRata Single row 0.025" square right angle post Digi-Key Ferrite Bead Chip Inductor, Chip Inductor, Chip Inductor, Chip Inductor, Chip Resistor, Chip, Thick Film Resistor, Chip, Thick Film Resistor, Chip, Thick Film Resistor, Chip, Thick Film Resistor, Chip, Thick Film Resistor, Chip, Thick Film Capacitor, Ceramic Chip Capacitor, Ceramic Chip Capacitor, Ceramic Chip Capacitor, Ceramic Chip Capacitor, Ceramic Chip Capacitor, Ceramic Chip Capacitor, Ceramic Chip Capacitor, Ceramic Chip Description rfRXD0420 016999 016985 B3751 B3750 SFECV10M7GA00 A26510-ND 240-1143-2-ND TKS3715TR-ND TKS3713TR-ND TKS3722TR-ND TKS3718TR-ND P0.0GTR-ND P390GTR-ND P470GTR-ND P1.0KGTR-ND P10KGTR-ND P100KGTR-ND PCC030CVTR-ND PCC060CVTR-ND PCC070CVTR-ND PCC331ACVTR-ND PCC1772TR-ND PCC1775TR-ND PCC1769TR-ND PCC1771TR-ND Part Number FIGURE 6: 2 1 1 1 8 3 1 1 1 Quantity Designator rfRXD0420 Receiver Module Bill-of-Materials TB070 rfRXD0420 RECEIVER MODULE BILL-OF-MATERIALS © 2003 Microchip Technology Inc. TB070 THIRD PARTY COMPONENT SUPPLIERS Crystek Crystal Corporation Murata Electronics North America, Inc. 12730 Commonwealth Drive Fort Myers, FL 33913 Toll Free: 1-800-237-3061 Phone: 1-239-561-3311 Fax: 1-239-561-1025 E-mail: [email protected] Internet: http://www.crystek.com Corporate Headquarters 2200 Lake Park Drive Smyrna, GA 30080-7604 Phone: 1-770-436-1300 Fax: 1-770-436-3030 Internet: http://www.murata-northamerica.com EPCOS, Inc. 186 Wood Avenue South Iselin, NJ 08830 Phone: 1-732-906-4300 Fax: 1-732-603-5935 E-Mail: [email protected] Internet: http://www.usa.epcos.com © 2003 Microchip Technology Inc. Preliminary TB070-page 5 TB070 NOTES: TB070-page 6 Preliminary © 2003 Microchip Technology Inc. Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. • Microchip is willing to work with the customer who is concerned about the integrity of their code. • Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.” Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break 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. Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip’s products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights. Trademarks The Microchip name and logo, the Microchip logo, KEELOQ, MPLAB, PIC, PICmicro, PICSTART, PRO MATE and PowerSmart are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. FilterLab, microID, MXDEV, MXLAB, PICMASTER, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. Accuron, Application Maestro, dsPIC, dsPICDEM, dsPICDEM.net, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, microPort, Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM, PICC, PICkit, PICDEM, PICDEM.net, PowerCal, PowerInfo, PowerMate, PowerTool, rfLAB, rfPIC, Select Mode, SmartSensor, SmartShunt, SmartTel and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. Serialized Quick Turn Programming (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. © 2003, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received QS-9000 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona in July 1999 and Mountain View, California in March 2002. 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