 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| QM Transmitter Module Features * MINIATURE SIL PACKAGE * UNIQUE QM (QUASI AM/FM) DESIGN * DATA RATES UP TO 10KBITS/S * OPTIMAL RANGE 500m (433.92 MHz Version) QFMT1-XXX * * * * * * 433.92 / 868 / 916.5 MHz VERSIONS SAW STABILISED QUASI AM/FM TRANSMISSION 3 TO 9 VOLT SUPPLY VOLTAGE INDUSTRY PIN COMPATABLE UNIQUE MODULATION SCHEME (High Interference Rejection) APPROVED TO EN 300-220-1 Applications * VEHICLE ALARM SYSTEMS * REMOTE GATE CONTROLS * GARAGE DOOR OPENERS * DOMESTIC AND COMMERCIAL SECURITY Compatible Receiver Modules * QMR1-XXX (see data sheet QMR1) * QFMR2-XXX (see data sheet QFMRX) * QFMR3-XXX (see data sheet QFMRX) * QTRC1-XXX Transceiver (see data sheet QTRC1) General Description The QFMT1-XXX miniature transmitter UHF radio module enables the implementation of a simple telemetry link at data rates of up to 10Kbit/s when used with one of the compatible Quasar receiver modules. Available for operation at 433.92, 868 and 916.5 MHz these modules are able to transmit at distances of up to 500m (433.92 MHz version). The QFMT1-XXX module will suit one-to-one and multi-node wireless links in applications including building and car security, remote industrial process monitoring and computer networking. Because of its small size and low power requirements, this modules is ideal for use in portable battery powered wireless applications QFMT1 rev 1.3 May 00 Reg No 3678152 Page 1 QM Transmitter Module Absolute Maximum Ratings: Transmitter Operating temperature: Storage temperature: Supply Voltage (pin 3) Data input (pin 5) RF Out (pin 2) -20C to +55C -40C to +100C 10V 10V 50V @ < 10MHz , +20dBm @ > 10MHz QFMT1-XXX Electrical Characteristics: Transmitter pin DC LEVELS Supply voltage Current & RF POWER 433.92 Supply current @ VCC = 5V (data low/high) RF power @ VCC = 5V 868 Supply current @ VCC = 5V (data low/high) RF power @ VCC = 5V 916.5 Supply current @ VCC = 5V (data low/high) RF power @ VCC = 5V RF & Data nd 2 harmonic Harmonics @ > 1GHz Initial frequency accuracy Overall frequency accuracy FM deviation () Modulation bandwidth @ -3dB Modulation distortion (THD) Power up time to full RF Data rate Data pulse width Note 1: measured into a 50 impedance 100 100 3 min. 3.0 Typ. 7.0 max. 9.0 units Volts notes 3 2 0 3/12 +8 mA dBm 1 1 3 2 0 5/16 +3 mA dBm 1 1 3 2 0 5/16 +3 mA dBm 1 1 -50 -46 75 100 10 20 10 20000 dBc dBc KHz KHz KHz KHz % s bits/s s 1 1 QFMT1 rev 1.3 May 00 Reg No 3678152 Page 2 QM Transmitter Module Connection Details General Information QFMT1-XXX Quasar UHF Radio Transmitter The Quasar transmitter module implements a unique quasi AM/FM modulation scheme that puts the baseband data signal onto the RF carrier in two different ways. Firstly the carrier is shifted in frequency (typically 20 KHz) which generates the normal FSK spectrum, but simultaneously the RF carrier is also amplified thus yielding the ASK spectrum. 1 2 3 4 5 Figure 1: Quasar Transmitter Utilising the quasi AM/FM modulation technique with one of the compatible Quasar receivers will yield a highly efficient wireless link. Pin Description: RF GND (pin 1) RF ground pin, internally connected to pin 4 (0V). This pin should ideally be connected to the nearest ground plane (e.g. coax braid, main PCB ground plane etc.) RF OUT (pin2) 50 RF antenna output. To achieve best results the antenna impedance must match that of the module. VCC (pin 3) +Ve supply pin (3.0 to 9.0 volts). The module will generate RF when VCC is present. It is strongly recommended that a 100nF capacitor decouples the supply rail as close as possible to this pin. GND (pin 4) Supply and data ground connection, connected to pin 1. Data IN (pin 5) This input has an impedance of 47K and should ideally be driven by a CMOS logic drive or compatible. The drive circuitry should be supplied with the same supply voltage as the Tx module. Note: Because of the way Quasi Modulation operates the QMR1 and the QFMT1 will not work reliably in close proximity to each other. QFMT1 rev 1.3 May 00 Reg No 3678152 Page 3 QM Transmitter Module Application Information Antenna Design 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. Best range is achieved with either a straight piece of wire, rod or PCB track @ 1/4 wavelength (15.5cm @ 433.92MHz). Further range may be achieved if the 1/4 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 QFMT1-XXX Application Circuit The application circuit shows how the Quasar QM transmitter can easily be integrated into a system to form a wireless link. ANTENNA +5V +5V Quasar UHF Radio Transmitter 1 2 3 4 5 1 2 A0 A1 VDD DOUT 18 17 ROC S 3 A2 4 5 A3 A4 OSC1 16 OSC2 TE\ 15 14 6 A5 7 A6 8 9 A7 VSS AD11 13 AD10 12 AD9 AD8 HT12E 11 10 Figure 3: Quasar QM Transmitter Application Circuit 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 Quasar QM Transmitter Module QFMT1 rev 1.3 May 00 Reg No 3678152 Page 4 QM Transmitter Module Mechanical Dimensions QFMT1-XXX 30mm 4mm 11mm Quasar UHF Radio Transmitter pin spacing 2.54mm 1 2 20.32mm 3 4 5 Figure 4: Quasar Transmitter Ordering Information Standard Product; Part No QFMT1-434 QFMT1-868 QFMT1-916 Description SIL Transmitter 434MHz SIL Transmitter 868MHz SIL Transmitter 916MHz Quasar Ltd 147 Beaumanor Rd Leicester LE4 5QE Tel: +44 (0) 870 240 2243 Fax: +44 (0) 870 240 2239 Email: sales@quasar-ltd.com Web Site: http://www.quasar-ltd.com QFMT1 rev 1.3 May 00 Reg No 3678152 Page 5 |
Price & Availability of QFMT1-434
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |