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MRF24J40MB

Data Sheet

2.4 GHz IEEE Std. 802.15.4™

20 dBm RF Transceiver Module

Summary of content (32 pages)

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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.
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MRF24J40MB 2.4 GHz IEEE Std. 802.15.4™ 20 dBm RF Transceiver Module Features: RF/Analog Features: • IEEE Std. 802.15.4™ Compliant RF Transceiver • Supports ZigBee®, MiWi™, MiWi P2P and Proprietary Wireless Networking Protocols • Small Size: 0.9" x 1.3" (22.9 mm x 33.
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MRF24J40MB Table of Contents 1.0 Device Overview .......................................................................................................................................................................... 3 2.0 Circuit Description ........................................................................................................................................................................ 7 3.0 Regulatory Approval........................................................................
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MRF24J40MB 1.0 DEVICE OVERVIEW 1.1 The MRF24J40MB is a 2.4 GHz IEEE Std. 802.15.4™ compliant, surface mount module with integrated crystal, internal voltage regulator, matching circuitry, Power Amplifier, Low Noise Amplifier and PCB antenna. The MRF24J40MB module operates in the non-licensed 2.4 GHz frequency band. The integrated module design frees the integrator from extensive RF and antenna design, and regulatory compliance testing, allowing quicker time to market.
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MRF24J40MB TABLE 1-1: Pin PIN DESCRIPTION Symbol Type Description 1 GND Power 2 RESET DI Global hardware Reset pin 3 WAKE DI External wake-up trigger 4 INT DO Interrupt pin to microcontroller 5 SDI DI Serial interface data input 6 SCK DI Serial interface clock 7 SDO DO Serial interface data output from MRF24J40 Ground 8 CS DI Serial interface enable 9 NC — No connection 10 VIN Power Power supply 11 GND Ground Ground 12 GND Ground Ground Legend: Pin type a
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MRF24J40MB 1.2 FIGURE 1-4: Mounting Details The MRF24J40MB is a surface mountable module. Module dimensions are shown in Figure 1-3. The module Printed Circuit Board (PCB) is 0.032" thick with castellated mounting points on the edge. Figure 1-4 is a recommended host PCB footprint for the MRF24J40MB. RECOMMENDED PCB FOOTPRINT The MRF24J40MB has an integrated PCB antenna. For the best performance, follow the mounting details shown in Figure 1-5.
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MRF24J40MB FIGURE 1-5: MOUNTING DETAILS 1.2” Keep area around antenna (approximately 1.2 inches) clear of metallic structures for best performance Edge of PCB 1.2” 0.315” 0.4” 0.4” PCB Ground Plane (Counterpoise) Underneath and extend as far as possible to the sides and below the module (at least 0.4 inches on each side) for best performance DS70599B-page 6 0.4” Preliminary © 2009 Microchip Technology Inc.
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MRF24J40MB 2.0 CIRCUIT DESCRIPTION 2.1 The MRF24J40MB is a complete 2.4 GHz IEEE Std. 802.15.4™ compliant surface mount module with integrated crystal, internal voltage regulator, matching circuitry, Power Amplifier, Low Noise Amplifier and PCB antenna. The MRF24J40MB module interfaces to many popular Microchip PIC microcontrollers via a 4-wire serial SPI interface, interrupt, wake, Reset, power and ground. Data communications with the MRF24J40MB module are documented in the “MRF24J40 IEEE 802.15.4™ 2.
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MRF24J40MB MRF24J40MB SCHEMATIC 1 MF 20 MHz 10 MF 2.2 MF FIGURE 2-1: DS70599B-page 8 Preliminary © 2009 Microchip Technology Inc.
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MRF24J40MB TABLE 2-1: MRF24J40MB BILL OF MATERIALS Designator Description Manufacturer Part Number C2 Chip Capacitor 0402 COG 0.5P Johanson Technology 500R07S0R5AV4T C3 Chip Capacitor 0402 COG 0.5P Johanson Technology 500R07S0R5AV4T C4 Chip Capacitor 0402 COG 1.0P Johanson Technology 500R07S1R0BV4T C5 Chip Capacitor 0402 COG 1.5P Murata GRM1555C1H1R5CZ01D C6 Not Used C7 Chip Capacitor 0402 COG 4.7P Murata GRM1555C1H4R7CZ01D C8 Chip Capacitor 0402 COG 4.
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MRF24J40MB TABLE 2-1: MRF24J40MB BILL OF MATERIALS (CONTINUED) Designator Description Manufacturer Part Number C46 Chip Capacitor 0402 X5R 100N Murata GRM155R61A104KA01D C47 Chip Capacitor 0402 COG 47P Murata GRM1555C1H470JZ01D C48 Chip Capacitor 0603 X5R 2.2U Murata GRM188R60J225ME01D IC1 802.15.
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MRF24J40MB 2.2 Printed Circuit Board The MRF24J40MB module printed circuit board is constructed with FR4 material, four layers and 0.032 inches thick. The layers are shown in Figure 2-2 through Figure 2-6. The stack up of the PCB is shown in Figure 2-7. FIGURE 2-2: TOP SILK SCREEN FIGURE 2-3: TOP COPPER FIGURE 2-4: Note: © 2009 Microchip Technology Inc. Preliminary LAYER 2 – GROUND PLANE Top view positive Gerber.
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MRF24J40MB FIGURE 2-5: Note: LAYER 3 – POWER PLANE FIGURE 2-6: Note: Top view positive Gerber. FIGURE 2-7: BOTTOM COPPER Top view. PCB LAYER STACK UP 1/2 oz. Copper Top Copper 8 mil FR4 1/2 oz. Copper Ground Plane 0.032‚ 12 mil FR4 +/- 0.005‚ 1/2 oz. Copper Power Plane 8 mil FR4 1/2 oz. Copper DS70599B-page 12 Preliminary Bottom Copper © 2009 Microchip Technology Inc.
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MRF24J40MB 2.3 PCB Antenna (www.ansoft.com). The design goal was to create a compact, low-cost antenna with the best radiation pattern. Figure 2-9 shows the simulation drawing and Figure 2-10 and Figure 2-11 show the 2D and 3D radiation patterns, respectively. As shown by the radiation patterns, the performance of the antenna is dependant upon the orientation of the module. Figure 2-12 shows the impedance simulation and Figure 2-13 shows the SWR simulation.
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MRF24J40MB FIGURE 2-9: PCB ANTENNA SIMULATION DRAWING FIGURE 2-10: SIMULATED 2D RADIATION PATTERN DS70599B-page 14 Preliminary © 2009 Microchip Technology Inc.
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MRF24J40MB FIGURE 2-11: SIMULATED 3D RADIATION PATTERN FIGURE 2-12: SIMULATED PCB ANTENNA IMPEDANCE © 2009 Microchip Technology Inc.
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MRF24J40MB 3.0 REGULATORY APPROVAL The user’s manual should include the following statement: The MRF24J40MB module has received regulatory approvals for modular devices in the United States, Canada and European countries. Modular approval allows the end user to place the MRF24J40MB module inside a finished product and not require regulatory testing for an intentional radiator (RF transmitter), provided no changes or modifications are made to the module circuitry.
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MRF24J40MB The following statement must be included as a CAUTION statement in manuals and OEM products to alert users of FCC RF exposure compliance: To satisfy FCC RF exposure requirements for mobile and base station transmission devices, a separation distance of 20 cm or more should be maintained between the antenna of this device and persons during operation. To ensure compliance, operation at closer than this distance is not recommended.
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MRF24J40MB 3.3 3.3.1 Europe The MRF24J40MB module has been certified for use in European countries. The following testing has been completed: Test standard ETSI EN 300 328 V1.7.
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MRF24J40MB 4.0 ELECTRICAL CHARACTERISTICS TABLE 4-1: RECOMMENDED OPERATING CONDITIONS Parameters Min Typ Max Units Ambient Operating Temperature -40 — +85 °C Supply Voltage for RF, Analog and Digital Circuits 2.4 — 3.6 V Supply Voltage for Digital I/O 2.4 3.3 3.6 V Input High Voltage (VIH) 0.5 x VDD — VDD + 0.3 V Input Low Voltage (VIL) -0.3 — 0.2 x VDD V TABLE 4-2: CURRENT CONSUMPTION (TA = 25°C, VDD = 3.
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MRF24J40MB TABLE 4-4: TRANSMITTER AC CHARACTERISTICS Typical values are at TA = 25°C, VDD = 3.3V, LO Frequency = 2.445 GHz Parameters Min Typ Max Units RF Carrier Frequency 2.405 — 2.480 GHz Maximum RF Output Power — 20 — dBm RF Output Power Control Range — 56 — dB — 1.25 — dB Carrier Suppression — -30 — dBc TX Spectrum Mask for Offset Frequency > 3.
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MRF24J40MB APPENDIX A: REVISION HISTORY Revision A (June 2009) Original release of this document. Revision B (July 2009) Added Section 3.0 “Regulatory Approval”. © 2009 Microchip Technology Inc.
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MRF24J40MB INDEX A P AC Characteristics Receiver ......................................................................21 Transmitter .................................................................. 22 Antenna Impedance Simulated PCB ............................................................ 15 PCB Antenna ...................................................................... 13 Dimensions ................................................................. 13 Simulation Drawing ........................
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MRF24J40MB THE MICROCHIP WEB SITE CUSTOMER SUPPORT Microchip provides online support via our WWW site at www.microchip.com. This web site is used as a means to make files and information easily available to customers.
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MRF24J40MB READER RESPONSE It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip product. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our documentation can better serve you, please FAX your comments to the Technical Publications Manager at (480) 7924150. Please list the following information, and use this outline to provide us with your comments about this document.
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MRF24J40MB PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. PART NO. M X T -X Device Module Module Type Tape and Reel Temperature Range Device MRF24J40MB; VDD range 2.4V to 3.6V Temperature Range I = -40°C to © 2009 Microchip Technology Inc. +85°C Examples: a) b) MRF24J40MB-I = Industrial temp. tray MRF24J40MBT-I = Industrial temp., tape and reel.
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