AMAM-RT14RT14-433P Long Range AM Transmitter Module Features • Complete RF Transmitter • CMOS / TTL Input • No Adjustable Components • Very Stable Operating Frequency • Low Current Consumption • Low Spurious Emissions Applications • Wireless Security Systems • Car Alarms • High Output Power • Remote Gate Controls • PLL Design • Remote Sensing • Data Capture • Sensor Reporting • Range 100+ metres General Description The R F Solutions Ltd. AM-RT14 high power AM transmitter module provides a complete RF transmitter which can be used to transmit data at up to 9,600Kbps from any standard CMOS/TTL source. The module is very simple to operate and offers low current consumption (typ. 8 mA). Data can be supplied directly from a microprocessor or encoding device, thus keeping the component count down and ensuring a low hardware cost. The module exhibits extremely stable electronic characteristics with no adjustable components and very reliable operation. The modules are compatible with R F solutions Ltd. range of AM receivers to provide a complete solution. Part Number Description AMAM-RT14RT14-433P DIL AM Transmitter Module 433.92MHz AMAM-RT14RT14-433PSO SMT AM Transmitter Module 433.92MHz AMAM-RT14RT14-433PSOTR SMT Tape & Reel AM Transmitter Module 433.92MHz DS-AM-RT14-433P-1 P ag e 1 AMAM-RT14RT14-433P 1.5 5.08 10.16 Transmitter Connection Diagram and Mechanical Dimensions Pin Description: Vcc (pin 1) : +Ve supply pin. The module will generate RF when Vcc is present. RF GND (pin 2) :RF ground pin, internally connected to pin 4 (0v). This pin should ideally be con: nected to the nearest ground plane ( e.g coax braid, main PCB ground plane etc. ). RF IN (pin 3) : Data input. ANT (pin 4): 50 Ohm RF antenna output. To achieve best results, the antenna impedance must match that of the module. Pin No Name Description 1 Vcc Supply Voltage 2 GND Ground, Connect to RF earth return path 3 IN Data input 4 ANT External Antenna DS-AM-RT14-433P-1 P ag e 2 AMAM-RT14RT14-433P Antenna Design Application Circuit The design and positioning of the antenna is as crucial as the module performance itself in achieving a good wireless system range. The following will assist the designer in maximising system performance. The application circuits a remote control Schematic, for further Data please see DS600 Transmitter Circuit The antenna should be kept as far away from sources of electrical interference as physically possible. If necessary, additional power line decoupling capacitors should be placed close to the module. Vcc Vcc 1 2 3 4 The antenna ‘hot end’ should be kept clear of any objects, especially any metal as this can severely restrict the efficiency of the antenna to receive power. Any earth planes restricting the radiation path to the antenna will also have the same effect. Best range is achieved with either a straight piece of wire, rod or PCB track @ ¼ wavelength (~16cm @ 433.92MHz). Further range may be achieved if the ¼ wave antenna is placed perpendicular in the middle of a solid earth plane measuring at least 16cm radius. In this case, the antenna should be connected to the module via some 50 ohm characteristic impedance coax. DS-AM-RT14-433P-1 Antenna SW1-4 P ag e 3 A0 Vcc A1 LED A2 DATA A3 GND 8 1 7 Vcc ANT 2 6 5 GND IN 4 3 RT4-XXX RTQ4-XXX RT14-XXX RF600E The transmitter application circuits generates a highly secure Keeloq protocol four switch transmitter encoder with LED indication or Transmission. AMAM-RT14RT14-433P Absolute Maximum Ratings: Transmitter (all voltage versions) Characteristic Operating Temperature Storage Temperature Min. -25°C -50°C Max. +80°C +100°C Supply Voltage - 24V Data Input - 10V Electrical Characteristics: Transmitter Ambient Temp 25 Unless Stated otherwise stated Min. Typ. Max. Units 9 Vdc Note DC Levels Supply (5V variants) 2 Supply current 8 mA 433.92 868.65 MHz +12 dBm -55 dBc Vcc=5V IN=1kHz RF & Data (All Variants) Working Frequency RF Output Power +10 Harmonic Spurious Emissions Input Voltage High Data Rate 2 Measured into a 50Ω Vcc=4V. V 50 9600 Hz RF Solutions Ltd. Recycling Notice Meets the following EC Directives: DO NOT Discard with normal waste, please recycle. ROHS Directive 2002/95/EC. Specifies certain limits for hazardous substances. WEEE Directive 2002/96/EC Waste electrical & electronic equipment. This product must be disposed of through a licensed WEEE collection point. RF Solutions Ltd., fulfils its WEEE obligations by membership of an approved compliance scheme. R F Solutions Ltd., 1 William Way, Burgess Hill W. Sussex. REH15 9AG. England. Email : [email protected] http://www.rfsolutions.co.uk Tel : 01444 227 900 Whilst the information in this document is believed to be correct at the time of issue, RF Solutions Ltd does not accept any liability whatsoever for its accuracy, adequacy or completeness. No express or implied warranty or representation is given relating to the information contained in this document. RF Solutions Ltd reserves the right to make changes and improvements to the product(s) described herein without notice. Buyers and other users should determine for themselves the suitability of any such information or products for their own particular requirements or specification(s). RF Solutions Ltd shall not be liable for any loss or damage caused as a result of user’s own determination of how to deploy or use RF Solutions Ltd’s products. Use of RF Solutions Ltd products or components in life support and/or safety applications is not authorised except with express written approval. No licences are created, implicitly or otherwise, under any of RF Solutions Ltd’s intellectual property rights. Liability for loss or damage resulting or caused by reliance on the information contained herein or from the use of the product (including liability resulting from negligence or where RF Solutions Ltd was aware of the possibility of such loss or damage arising) is excluded. This will not operate to limit or restrict RF Solutions Ltd’s liability for death or personal injury resulting from its negligence.