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BiM3H transceiver UHF FM 400mW transceiver module The BIM3H is a miniature PCB mounting UHF radio data transceiver incorporating a received signal strength indicator (RSSI). It allows the simple implementation of data links at speeds up to 10kbps and distances up 5000 metres over open ground. Designed to comply with harmonised radio standard EN 300 220-3 Designed to comply with harmonised EMC standard EN 301 489-3 Data rates up to 10kb/s Usable range up to 5000m Frequency 869.50MHz Fully screened Fast data settling time Available for operation at 869.50MHz in the UK and Europe, the BiM3H combines full screening with internal filtering to ensure EMC compliance by minimising spurious radiation and susceptibility. The module suits 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 the small size and low power requirements, the BIM3H is ideal for use in portable, battery-powered applications such as hand-held terminals. Technical Summary Receiver Single conversion FM superhet SAW front end filter gives >50dB image rejection 5 volt operation Current consumption 15mA -108dBm sensitivity @ 1ppm BER RSSI output with 50dB range Extremely low LO leakage, -125dBm typical Transmitter Transmit power: 400mW (26dBm, +/- 1dB) Operating frequency 869.50MHz 5 volt operation Current consumption 310mA (typical) Data rate: 10 kbps Evaluation platforms: NBEK + BiM / SMX carrier Radiometrix Ltd, BiM3H Data Sheet
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00 Radiometrix Ltd, BiM3H Data Sheet page 2
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side view (through can) side view (with can) pin pitch: 2.54 mm recommended PCB hole size: 1.2 mm pins 4, 5, 6, 7 & 8 are not fitted module footprint size: 25 x 32 mm Figure 3: BiM3H Footprint (Top) view Pin description RF IN / OUT (pin 2) 50U input from the antenna, DC isolated. RF GND (pin 1/3) RF ground pin, internally connected to the module screen . This pin should be connected to the RF return path (coax braid, main PCB ground plane etc.) 0V (pin 9/18/10) DC supply ground. Internally connected to pin 2 and module screen. RSSI (pin 11) Received signal strength indicator...
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Absolute maximum ratings Exceeding the values given below may cause permanent damage to the module. Operating temperature -20 uC to +70 uC RSSI, AF, RXD (pins 11,13,12) -0.1V to +3V RF IN/OUT (pin 2) U50V DC, +10dBm RF (Vcc = 5.0V/ temperature = 200 C unless stated) Baseband Baseband bandwidth @ -3dB 13 0.1 Load capacitance, AFout/RXD - DYNAMIC TIMING Power up with signal present Power up to valid RSSI - Power up to stable data - Signal applied with supply on RSSI response time (rise/fall) 11 - Signal to stable data 12 - Time between data transitions 70...
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DC supply Supply voltage Supply current RF RF power output Spurious emissions,<1GHz Spurious emissions,>1GHz RF centre frequency Initial frequency accuracy Overal frequency accuracy FM deviation (peak) Antenna impedance Baseband Baseband bandwidth @ -3dB Maximum raw data rate TXD input level (logic low) TXD input level (logic high) DYNAMIC TIMING TX enable to full RF Measured into 50 Ohm load Meets EN requirements at all frequencies There is a <10% duty cycle restriction on 869.50MHz in EU member states Total over full supply and temperature range With 0V - 5V modulation input 5V CMOS...
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Received Signal Strength Indicator (RSSI) The module incorporates a wide range RSSI which measures the strength of an incoming signal over a range of approximately 50dB. This allows assessment of link quality and available margin and is useful when performing range tests. The output on pin 11 of the module has a standing DC bias in the region of 0.5V with no signal, rising to around 1V at maximum indication. The RSSI output source impedance is high (~100k ) and external loading should therefore be kept to a minimum. To ensure a fast response the RSSI has limited internal decoupling of 1nF...
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Radiometrix Ltd, BiM3H Data Sheet Duty Cycle Channel Spacing Social Alarm Alarm CEPT/ERC Rec 70-03, 868 MHz Band Plan
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Copyright notice This product data sheet is the original work and copyrighted property of Radiometrix Ltd. Reproduction in whole or in part must give clear acknowledgement to the copyright owner. Limitation of liability The information furnished by Radiometrix Ltd is believed to be accurate and reliable. Radiometrix Ltd reserves the right to make changes or improvements in the design, specification or manufacture of its subassembly products without notice. Radiometrix Ltd does not assume any liability arising from the application or use of any product or circuit described herein, nor for...
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