Details, datasheet, quote on part number: QMR2-434
PartQMR2-434
Category
DescriptionReceiver Superhet Sil 433mhz
CompanyN.A.
DatasheetDownload QMR2-434 datasheet
  

 

Features, Applications

QM Receiver Module Features MINIATURE SIL PACKAGE UNIQUE QM (QUASI AM/FM) DESIGN SELECTIVE FRONT END FILTERS TO

HELP COMBAT INTERFERENCE QFMR2 UTILISES PASSIVE FRONT END FILTER QFMR3 UTILISES SAW FRONT END FILTER (Improved Interference Rejection)

DATA RATES TO 10KBITS/S OPTIMAL RANGE 300m (433.92 MHz Version) MHz VERSIONS VERY HIGH SENSITIVITY (-100 dBm) VERY LOW CURRENT CONSUMPTION SINGLE 5V SUPPLY HIGH SELECTIVITY (20KHz B/W Possible) IMMUNE FROM FM THRESHOLD EFFECT

Applications VEHICLE ALARM SYSTEMS REMOTE GATE CONTROLS GARAGE DOOR OPENERS DOMESTIC AND COMMERCIAL SECURITY

Compatible Transmitter Modules QFMT1-XXX (see data sheet QFMT1) QTRC1-XXX Transceiver (see data sheet

The QFMRX-XXX miniature receiver UHF radio module enables the implementation of a simple telemetry link at data rates to 10Kbit/s when used with one of the compatible Quasar transmitter modules Available for operation 433.92, 868 and 916.5 MHz these modules are able to receive at distances 1Km (433.92 MHz version). The QFMRX-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, the module is ideal for use in portable battery powered wireless applications

QM Receiver Module Absolute Maximum Ratings: Receiver

Operating temperature: Storage temperature: Supply Voltage (pin 5) Data input (pin 7) RF Input (pin 10V 0 dBm

pin DC LEVELS Supply voltage Supply current Supply ripple Data output high Data output low RF sensitivity IF Bandwidth Initial frequency accuracy Max R.F. input E.M.C. Spurious responses upto 1GHz LO leakage, conducted LO leakage, radiated DYNAMIC TIMING Power up to stable data (With RF signal present Signal to stable data (With power supply already on) Mark:space ratio Bit rate min. 4.5 typ. max. 5.5 10 units V mA mVP-P V notes

The Quasar receiver module is a quasi AM/FM superhet receiver capable of handling data rates to 10Kbits/s. With an on board data buffer, phase locked loop and high Q front end RF filter a 100 dBm sensitivity is achieved. The QFMR2-XXX uses a passive front end filter whereas the QFMR3-XXX use a very selective saw front end filter to help combat the effects of the new Tetra mobile system and other sources of interference. A comparison of the filters is shown in Figure 3

RF IN (pin 50 RF input from antenna, connect using shortest possible route. Capacitively isolated from internal circuit. RF GND (pin 2) RF ground connection, preferably connected to a solid ground plane. RSSI (pin 3) The Received Signal Strength Indicator provides a DC output voltage proportional to the RF input signal UNCONNECTED (pin 4) VCC (pin 5) +Ve supply pin. Operation from a 5V supply able to source 2mA at less than 10mVP-P ripple. RSSI (pin 6) The Received Signal Strength Indicator provides a DC output voltage proportional to the RF input signal DATA OUT (pin 7) CMOS compatible output. This may be used to drive external decoders.

Figure 3: QFMR2 and QFMR3 Front End Filter Comparison Utilising the quasi AM/FM modulation technique and the latest phase locked loop receiver technology with one of the compatible Quasar transmitter modules will yield a highly efficient wireless link.


 

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