High Integrity FM Transceiver RS-MK-X2010 Features • • • • • • • • • • • Operation on 434.075, 868.40 and 914.5 MHz X2011 version includes integrated pcb loop antenna (434 & 868 MHz versions) Double RF filtering = High Reliability RF Link Data rates to 20 kbps (Wide-band 64 kbps version available to order) -112 dBm receiver sensitivity (434 version) CD and RSSI outputs Crystal stabilised accurate RF Hence narrower BW filter utilised Results in over 300m range EN 300 220-1, 300 683 & FCC compliant Immune to Tetra and High power Radio Amateur Repeater Stations Applications • EPOS TERMINALS • REMOTE TELEMETRY & TELECOMMAND • • REMOTE METER READING DOMESTIC AND COMERCIAL SECURITY General Description The WP-MK-X2010 radio transceiver module was designed to provide reliable wireless operation at moderate data rates for use throughout the world. Its unique features of narrower RF channel bandwidths and hence high interference rejection capability at SAW module prices make the X2010 the ideal choice for next generation applications. Available for operation at the major frequency allocations world-wide in the same package, these modules have been designed to provide a reliable wire free link for the next century, accounting for the increased traffic from other legal users of the radio spectrum. The transmitter section uses a PLL design that utilises a highly stable and accurate reference crystal oscillator. This results in a RF transmission tightly controlled in its frequency spread and over its operating temperature range. This is exploited in the receiver design. The receiver section uses a single conversion super-het design, again using PLL technology. Hence narrower bandwidth RF filters are utilised which result in superior rejection of interference as well as providing good receiver sensitivity and hence range. Page 1 of 7 High Integrity FM Transceiver RS-MK-X2010 Absolute Maximum Ratings: Receiver -20° C to +55° C -40° C to +100° C 6V Vcc + 0,3v 0 dBm Operating temperature: Storage temperature: Supply Voltage Data Input: RF Input Electrical Characteristics: Performance data measured at 20° C and +5 volt supply and RF = 434,075 MHz DC LEVELS Supply voltage Supply current (receiver enabled) Supply current (transmitter enabled) Leakege current with Vcc connected Data input/output high Data input/output low RF Receiver sensitivity (12 dB SINAD on AF output) Image rejection RF power out (transmitter) FM Deviation Initial frequency accuracy Overall frequency accuracy Max RF input to receiver pin min. typ. max. units 17 17 17 4,5 5 7 8 5,5 12,14 12,14 0,7xVcc 0 V mA mA uA V V 13 E.M.C. Spurious responses upto 1GHz LO leakage, conducted LO leakage, radiated DYNAMIC TIMING RX enable to valid RSSI / CD RX enable to stable receiver data out TX enable to full RF out Minimum data pulse width Data Bit rate 50 1 Vcc 0,0xVcc -112 dBm 50 1 +/-10 ± 100 +/-2 0 dB mW KHz Hz KHz dBm <-36 <60 <60 dB dBm dBm 5 5 50 mS mS mS uS bps 20000 notes 2 Notes 1) 2) Over full operating temperature range 1 Hz = 2 bps Page 2 of 7 High Integrity FM Transceiver RS-MK-X2010 Mechanical description 8.5 2.0 0.8 5.0 1.3 30.4 22.0 1 2 3 4 5 6 7 8 9 Pin 1 18 17 16 15 14 13 12 11 10 33.0 Notes • • • • Recommended PCB hole diameter to accommodate the connecting pins = 1.2mm All dimensions are in mm Distance between each connecting pin = 2.54mm Pins 4,5,6 and 7 are internally floating not connected to anything Page 3 of 7 High Integrity FM Transceiver RS-MK-X2010 Mechanical description Loop Antenna 3 48 1 18 17 16 15 14 13 12 11 10 23 7 8 9 33 Notes • • • All dimensions are in mm Recommended PCB hole diameter to accommodate the connecting pins = 1.2mm Distance between each connecting pin = 2.54mm Page 4 of 7 High Integrity FM Transceiver RS-MK-X2010 Pin Functional description WP-MK-X2010 & WP-MK-X2011 Pin No. Description 1&3 RF Ground 2 Antenna 9, 10, 18 4, 5, 6 & 7 7 (WP-MK-X2011) Ground NC Gnd 8 RSSI 11 CD 12 RxD 13 AF 14 TxD 15 Tx Enable 16 Rx Enable 17 Vcc Details For best results, these pins should be connected to the ground plane against which the antenna radiates Nominal 50 ohm input/output impedance capacitively isolated from internal circuit. See application notes for antenna examples Supply ground points Not connected internally RF gnd only on X2011 Receiver signal strength indicator DC voltage proportional to RF signal strength being received Digital Carrier Detect Output – Active Low Receiver digital data output (CMOS logic out) representing true data as supplied to the transmitter Audio Frequency Output Data input to the transmitter can be directly interfaced to CMOS logic drive operating on the same supply voltage as the transceiver Active Low Applying Vcc disables the transmitter Active Low Applying Vcc places the receiver in sleep mode Supply voltage range from 4.5 to 5.5volts. Note that module is not reverse polarity protected State Table Tx (Pin 15) Rx (Pin 16) 1 1 0 0 1 0 1 0 Mode Power down mode. Supply current < 1uA Receiver only enabled. Data, AF, CD and RSSI outputs valid Transmitter only enabled. Tx data input valid Tx and Rx on. Avoid this mode as it will eventually destroy the module Page 5 of 7 High Integrity FM Transceiver RS-MK-X2010 Application Information RSSI Values Antenna Design The RSSI output provides a dc voltage that is proportional to the RF signal strength picked up on the antenna (pin 2) port of the module. 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 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. 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. The table below gives typical values of RSSI for varying degrees of RF signal strength applied. RF Input (dBm) -105 -100 -90 -80 -70 -60 -50 -40 -30 -20 RSSI (V) 0,82 0,88 1,12 1,43 1,75 2,06 2,36 2,57 2,6 2,6 Best range is achieved with either a straight piece of wire, rod or PCB track @ ¼ wavelength (15.5cm @ 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. Helical Antenna RF 34mm @ 433MHz 17 turns equally spaced = 5mm (inside) ∅ Whip Antenna RF 15.5cm @ 433MHz Figure 2: Antenna Configurations To Be Used With The WP-MK-X2010 Page 6 of 7 High Integrity FM Transceiver RS-MK-X2010 Ordering Information Standard Product; Part No WP-MK-X2010-434 WP-MK-X2010-868 WP-MK-X2010-914 WP-MK-X2011-434 WP-MK-X2011-868 Description 434,075 MHz Transceiver 868,40 MHz Transceiver 914,5 MHz Transceiver Integrated Antenna 434,075 MHz Transceiver Integrated Antenna 868,40 MHz Transceiver Note: 868 and 914 versions available November 2001. Round Solutions Ltd. Niederlassung Deutschland Zaunweg 4 D-63303 Dreieich Tel. 06103 960510 Fax. 06103 960509 www.roundsolutions.com [email protected] Page 7 of 7