FM TRANSMITTER & RECEIVER HYBRID MODULES. FM-RRFQ SERIES. Transmitter. Receiver. Applications

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1 FM Radio Transmitter & Receivers Available As 5 or 4 or 868MHz Transmit Range Up To 250m Miniature Packages Data Rate upto 9.6Kbps No Adjustable Components Very Stable Operating Frequency Operates from 20 to C RTFQ Transmitter -2 Supply Voltage SIL or DIL Package Receiver PLL XTAL Design CMOS/TTL Output RSSI Output Standby Mode (max 00nA) 5V Supply Voltage RRFQ RTFQ2 Applications Wireless Security Systems Car Alarms Remote Gate Controls Remote Sensing Data Capture Sensor Reporting RRFQ2 Description These miniature RF modules provide a cost effective high performance FM Radio data link, at either 5, 4.92 or 868MHz. Manufactured using laser trimmed Thick Film ceramic Hybrid the modules exhibits extremely stable electronic characteristics over an Industrial Temperature range. The hybrid technology uses no adjustable components and ensures very reliable operation. This transmitter and receiver pair enables the simple implementation of a data link at distances upto 75 metres in-building and 250 metres open ground. These modules will suit one-to-one and multi-node wireless links in applications including car and building security, EPOS and inventory tracking, remote industrial process monitoring and computer networking. Because of their small size and low power requirements, both modules are ideal for use in portable, batterypowered applications such as hand-held terminals. DS069-7 May Reg. No , England Page

2 Transmitters There are two versions of transmitter: RTFQ; A Dual in Line Package operating at.v. This provides the most rugged mechanical fixing to the host PCB. Power Down mode is also available. RTFQ2; A Single in Line Package incorporating a voltage regulator for -2V operation. (Compatible with many other RF transmitter modules available) Transmitter Block Diagram In XTAL XTAL Oscillator PLL Synthesizer Power Amp Out Part Numbering En Part Number FM-RTFQ-5 FM-RTFQ-4 FM-RTFQ-868 FM-RTFQ2-4R FM-RTFQ2-868R Description DIL FM Transmitter Module 5 MHz DIL FM Transmitter Module 4.92 MHz DIL FM Transmitter Module MHz SIL FM Transmitter Module 4.92 MHz -2V I/P SIL FM Transmitter Module MHz -2V I/P Receivers There are two versions of receiver: RRFQ: A Single in Line Package with sleep / Power down mode. RRFQ2: A Single in Line Package, pin compatible with many other receivers Receiver Block Diagram In Pre Amp Filter Mixer 0.7MHz IF Filter FM Demodulator Comparator Out PLL Synthesizer Part Numbering Part Number FM-RRFQ-5 FM-RRFQ-4 FM-RRFQ-868 FM-RRFQ2-4 FM-RRFQ2-868 Description SIL FM Receiver Module 5 MHz SIL FM Receiver Module 4.92 MHz SIL FM Receiver Module MHz SIL FM Receiver Module 4.92 MHz SIL FM Receiver Module MHz DS069-7 May Reg. No , England Page 2

3 RTFQ Mechanical Dimensions PCB Layout Requirements 20.2mm 5.08mm 2.54mm 20mm 2 Top View (Components Underneath) mm Module Thickness 2mm Pins on "0. pitch RTFQ2 Mechanical Dimensions PCB Layout Requirements 0.48mm Pin Description mm 2.54 spacing RTFQ mm mm Module Thickness 2mm Pins on "0. pitch RTFQ RTFQ2 Name Description N/A En Enable (active high) 2 5 IN Data input Ground, Connect to RF earth return path 4 Supply Voltage 5 4 Ground, Connect to RF earth return path 6 2 EA External Antenna Technical Specifications Electrical Characteristics MIN TYPICAL MAX DIMENSION Supply Voltage RTFQ V Supply Voltage RTFQ V Supply Current 7 8 ma Standby Current (IN = EN = Low) 00 na Frequency MHz RF Output into 50Ω (=.V) +5 / +5 / + dbm Initial Frequency Accuracy KHz FM Deviation KHz Harmonic Spurious Emissions -50 dbc Input High Voltage RTFQ.5 V Input High Voltage RTFQ V Power up Time (En to full RF) ms Power up Time (Power on to full RF) 5 ms Max Data Rate 9.6 KHz Operating Temperature C DS069-7 May Reg. No , England Page

4 RRFQ Mechanical Details 8.mm 4mm Component Side 8.mm mm RRFQ2 Mechanical Details 45.72mm mm Component Side 6.5mm mm mm Pin Description RSSI Output* RRFQ RRFQ2 Pin Description RF In (dbm) RSSI (V) , 7, 2,5-0.2 Data In (Antenna) NC Received Signal Strength Output N/A 7 AF Output Data Out N/A Power Down V = Standby V = Operating RSSI Output The RSSI provides a DC Voltage proportional to the peak value of the receive data signal. This output can be used as an indicator for the received signal strength to use in wake-up circuits etc. An RC circuit is normally used to provide the timing for the RSSI signal. The modules have a 0nF capacitor internally connected to, therefore a pull down resistor (to ) connected to the RSSI pin may be used to generate a simple RC network time constant for the RSSI signal output. Please note that the maximum output current is typically 950µA, the discharge current is lower than 2µA DS069-7 May Reg. No , England Page 4

5 Technical Specifications Electrical Characteristics Min Typical Max Dimension Notes Supply Voltage () V Supply Current (Operating) ma Supply Current (Standby) 00 na Receiver Frequency MHz R.F Sensitivity (00% AM) 5,4MHZ versions -0 dbm 868MHz versions -00 db Bandwidth +/-50 KHz Data Rate 00 9,600 Hz Turn on Time 5 msecs Turn on Time 8 msecs 2 Level of Emitted Spectrum -70 dbm Low Level Output Voltage 0.8 V I = 200uA High Level Output Voltage - V I = 200uA RSSI Output 0.95 ma Operating Temperature Range o C Notes. Time from PD pin going high to stable data. (RRFQ only) 2. Time from Power ON to stable data. DS069-7 May Reg. No , England Page 5

6 Typical Application The following circuits show a remote control system with self learning feature for more information please see Datasheet DS600 Transmitter Circuit.V Ante nna.v Receiver Circuit SW-4 8 A0 2 7 A LED 6 A2 DATA 4 5 A RF600E 0K BC848 2K2 EN 2 IN 6 ANT 5 4 RTFQ-XXX KΩ 5KΩ 4 4 FM-RRFQ Status LED Option Link L M 2 7 Sleep OP LKIN 8 OP2 OP O/P O/P 2 O/P Learn Switch KΩ 0 OP4 2 LRN LB RF600D SD O/P 4 Transmitter Low Battery Serial Data Output 9 IN ECLK 7 22KΩ 5 Prototyping Hints: It is essential when building any Low Power Radio System that you have a clean DC power source. Typically the ripple voltage should be less than 0mV Peak to Peak. Normally a 470uF decoupling capacitor is sufficient de-coupling for an AC derived DC power source. Never place a Transmitter or Receiver directly into Vero-Board or any similar prototyping board. This will severely restrict the range. Rather, use small lengths of wire from the prototyping board to the pins of the Transmitter or Receiver. A useful antenna, for testing purposes, for both the Transmitter and Receiver on 4MHz is to use a piece of wire 7.cm long (2.8cm at 5MHz) soldered directly to the antenna pin. For more information or general enquiries, please contact; RF Solutions Ltd., Unit 2, Cliffe Industrial Estate, South Street, Lewes, E Sussex, BN8 6JL. England Tel +44 (0) Fax +44 (0) sales@rfsolutions.co.uk RF Solutions is a member of the Low Power Radio Association All Trademarks acknowledged and remain the property of the respected owners Information contained in this document is believed to be accurate, however no representation or warranty is given and R.F. Solutions Ltd. assumes no liability with respect to the accuracy of such information. Use of R.F.Solutions as critical components in life support systems is not authorised except with express written approval from R.F.Solutions Ltd. DS069-7 May Reg. No , England Page 6