FM TRANSMITTER MODULE QFM-TX1 Features Complete RF Transmitter Transmit Range Up To 100m* CMOS / TTL Input No Adjustable Components Very Stable Operating Frequency Low Current Consumption (Typ 15mA) LV TTL Operating Voltage (2.2-3.5v) FSK Modulation Efficient Power Amplifier Applications Wireless Security Systems Car Alarms Remote Controls Remote Sensing Data Capture Automation systems Description The Quasar UK FM hybrid transmitter module provides a complete RF transmitter which can be used to transmit data at up to 4.8Kbps from any standard CMOS/TTL source. The module is very simple to operate and offers low current consumption (typ. 15mA). Data can be supplied directly from a microprocessor or encoding device, thus keeping the component count down and ensuring a low hardware cost. The modules are compatible with the QuasarUK QFM-RX1-433 FM receiver operating at 434.2MHz (within the 433 band) to provide a complete wireless solution. Typical Application For further information on this circuit please refer to the RF Solutions Ltd datasheet, DS600. Vcc Antenna SW1-4 1 8 6 1 A0 Vcc 2K2 7 5 2 QFM-TX1 2 A1 LED 3 4 6 3 A2 DATA 10K 5 4 A3 GND RF600E Part Numbering Part Number Description QFM-TX1-433 FM Transmitter Module, 434.2MHz *Range stated is for modules used in direct line of sight, adverse conditions may reduce the maximum range. *Range stated is for modules used in direct line of sight, adverse conditions may reduce the maximum range. DSQFM-TX1-2 Feb 14 2007 Quasar (UK) Ltd. Page 1 FM TRANSMITTER MODULE QFM-TX1 Technical Specifications Dimensions Pin Measurements (mm) Pin Measurements (mm) A 16.802 E 1.351 B 12.501 F 2.54 C 2.0 G 2.4 D 2.5 H 2.6 Pin Descriptions Pin Name Description 1 Vcc Supply Voltage 2, 5 GND Ground 3 Enable Supply Voltage 4 Data Data Input 6 ANT External Antenna Electrical Characteristics Ambient temp = 25C unless otherwise stated. Characteristic Min. Typ. Max. Dimensions Supply Voltage 2.2 3 3.5 Vdc Supply Current (Vcc=3V IN=1kHz) 15 mA Standby Current 0.5 uA Working Frequency 434.2 MHz Output Power 10 dBm Turn on Time (from Standby) 1 ms Data Rate 200 4,800 Hz C Operating Temperature -20 +85 Information contained in this document is believed to be accurate, however no representation or warranty is given and no liability is assumed by Quasar (UK) Ltd. with respect to the accuracy of such information. Use of products as critical components in life support systems is not authorised except with express written approval from Quasar (UK) Ltd. DSQFM-TX1-2 Feb 14 2007 Quasar (UK) Ltd. Page 2