RFM12 HOPE | Alldatasheet

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UNIVERSAL ISM BAND FSK TRANSCEIVER MODULE RFM12 RFM12 （the purpose of this spec covers mainly for the physical characteristic of the module, for register configure and its related command info please refer to RF12 data sheets） General Introduction RFM12 is a low costing ISM band transceiver module implemented with unique PLL. It works signal ranges from 315/433/868/915MHZ bands, comply with FCC, ETSI regulation. The SPI interface is used to communicate with microcontroller for parameter setting. Features:

  • Low costing, high performance and price ratio
  • Tuning free during production
  • PLL and zero IF technology
  • Fast PLL lock time
  • High resolution PLL with 2.5 KHz step
  • High data rate (up to 115.2 kbps with internal demodulator，with external RC filter highest data rate is 256 kbps)
  • Differential antenna input
  • Automatic antenna tuning
  • Programmable TX frequency deviation (from 15 to 240 KHz)
  • Programmable receiver bandwidth (from 67 to 400 kHz)
  • Analog and digital signal strength indicator (ARSSI/DRSSI)
  • AFC
  • DQD
  • Internal data filtering and clock recovery
  • RX synchron pattern recognition
  • SPI interface
  • Clock and reset signal output for external MCU use
  • 16 bit RX Data FIFO
  • Two 8 bit TX data registers
  • 10MHz crystal for PLL timing
  • Wakeup timer
  • 2.2V - 5.4V power supply
  • Low power consumption
  • Standby current less than 0.3uA Tel: +86-755-82973806 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com

Typical Application：

  • Remote control
  • Remote sensor
  • Wireless data collection
  • Home security system
  • Toys
  • Tire pressure monitoring system Pin Definition： S M D D I P definition Type Function nINT/VDI DI/ DO Interrupt input (active low)/Valid data indicator VDD S Positive power supply SDI DI SPI data input SCK DI SPI clock input nSEL DI Chip select (active low) SDO DO Serial data output with bus hold nIRQ DO Interrupts request output（active low） FSK/DATA/nFFS DI/DO/DI Transmit FSK data input/ Received data output (FIFO not used)/ FIFO select DCLK/CFIL/FFIT DO/AIO/DO Clock output (no FIFO )/ external filter capacitor(analog mode)/ FIFO interrupts(active high)when FIFO level set to 1, FIFO empty interruption can be achieved CLK DO Clock output for external microcontroller nRES DIO Reset output（active low） GND S Power ground Tel: +86-755-82973806 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com

Tel: +86-755-82973806 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com Electrical Parameter： Maximum（not at working mode） symbol parameter minimum maximum Unit Vdd Positive power supply -0.5 6.0 V Vin All pin input level -0.5 Vdd+0.5 V Iin Input current except power -25 25 mA ESD Human body model 1000 V Tst Storage temperature -55 125 ℃ Tld Soldering temperature(10s) 260 ℃ Recommended working range symbol parameter minimum maximum Unit Vdd Positive power supply 2.2 5.4 V Top Working temperature -40 85 ℃ DC characteristic symbol parameter Remark minimum typical maximum Unit Idd_TX_0 Supply current (TX mode, Pout = 0dBm) 315,433MHz band 868MHz band 915MHz band mA Idd_TX_PMAX Supply current (TX mode, Pout = Pmax) 315,433MHz band 868MHz band 915MHz band mA Idd_RX Supply current (RX mode) 315,433MHz band 868MHz band 915MHz band mA Ix Stand by current Crystal and base band on 3．0 3．5 mA Ipd Sleep mode current All blocks off 0.3 uA Ilb Low battery detection 0.5 uA Vlb Low battery step 0.1V per step 2.2 5.3 V Vlba Low battery detection accuracy 75 mV Vil Low level input 0.3*Vdd V Vih High level input 0.7*Vdd V Iil Leakage current Vil=0V -1 1 uA Iih Leakage current Vih=Vdd, Vdd=5.4V -1 1 uA Vol Low level output Iol=2mA 0.4 V Voh High level output Ioh=-2mA Vdd-0.4 V

Tel: +86-755-82973806 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com AC characteristic symbol parameter remark min typical max Unit fref PLL frequency 8 10 12 MHz fLO frequency (10MHz crystal used) 315 MHz band,2.5KHz step 433 MHz band,2.5KHz step

868 MHz band,5KHz step

915 MHz band,7.5KHz step 310.24 430.24 860.48 900.72 319.75 439.75 879.51 929.27 MHz fLO frequency (8MHZ crystal used) 315 MHz band,2.5KHz step 433 MHz band,2.5KHz step 915 MHz band,7.5KHz step 248.19 344.19 688.38 720.57 255.80 351.80 703.61 743.41 MHz fLO frequency (12MHZ crystal used) 315 MHz band,2.5KHz step 433 MHz band,2.5KHz step 915 MHz band,7.5KHz step 372.28 516.28 1032.5 1080.8 383.71 527.71 1055.4 1115.1 MHz BW Receiver bandwidth 120 180 240 300 360 134 200 270 350 400 150 225 300 375 450 KHz tlock PLL lock time After 10MHz step hopping, frequency error <10 kHz 20 us BR Data rate With internal digital demodulator 0.6 115.2 kbps BRA Data rate With external RC filter 256 kbps Pmin sensitivity BW=134KHz,BR=1.2kbps -102 -96 dBm AFCrange AFC working range dfFSK FSK deviation in the received signal 0.8* dfFSK RSA RSSI accuracy ±5 dB RSR RSSI range 46 dB CARSSI ARSSI filter 1 nF RSSTEP RSSI programmable step 6 dB RSRESP DRSSI response time RSSI output high after valid , CARRSI=5nF 500 us AC characteristic(Transmitter) symbol parameter remark min typical max Unit Pmax Available output power with optimal antenna impedance 315/433MHZ band 868/915MHZ band dbm Pout Typical output power Selectable in 3 dB steps Pmax-21 Pmax dbm

Tel: +86-755-82973806 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com Co Output capacitance (set by the automatic antenna tuning circuit) In low bands In high bands 2.1 2.6 2.7 3.2 3.3 pf Qo Quality factor of the output capacitance In low bands In high bands Lout Output phase noise 100 kHz from carrier

1 MHz from carrier

-75 -85 dbc/HZ BR FSK bit rate 256 kbps dffsk FSK frequency deviation Programmable in 15 kHz steps 15 240 kHZ AC characteristic(Turn-on/Turnaround timings) symbol parameter remark min typical max Unit Tst Crystal oscillator startup time Crystal ESR < 100 5 ms Ttx_rx_XTAL_ON Transmitter - Receiver turnover time Synthesizer off, crystal oscillator on 450 us Trx_tx_XTAL_ON Receiver - Transmitter turnover time Synthesizer off, crystal oscillator on 350 us Ttx_rx_SYNT_ON Transmitter - Receiver turnover time Synthesizer on, crystal oscillator on 425 us Trx_tx_SYNT_ON Receiver - Transmitter turnover time Synthesizer on, crystal oscillator on 300 us Cxl Crystal load capacitance Programmable in 0.5 pF steps, tolerance+/- 10% 8.5 16 pf tPOR Internal POR timeout After Vdd has reached 90% of final value 100 ms tPBt Wake-up timer clock period Calibrated every 30 seconds 0.96 1.05 ms Cin, D Digital input apacitance 2 pf tr, f Digital output rise/fall time 15pF pure capacitive load 10 ns Field testing range Band Test condition Distance 315MHz band Receiver bandwidth=67KHz,data rate =1.2kbps,Transmitter frequency deviation =45KHZ（matches with RFM12）in free open area >100M 433MHz band Receiver bandwidth =67KHz, data rate=1.2kbps, transmitter frequency deviation =45KHZ（matches with RFM12）In free open area >150M 868MHz band Receiver bandwidth=67KHz,data rate =1.2kbps,Transmitter frequency deviation =45KHZ（matches with RFM12）in free open area >100M 915MHz band Receiver bandwidth=67KHz,data rate =1.2kbps,Transmitter frequency deviation =45KHZ（matches with RFM12）in free open area >100M

Tel: +86-755-82973806 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com

Tel: +86-755-82973806 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com

（units in mm） SMD PACKAGE（S1） SMD PACKAGE（S2） Tel: +86-755-82973806 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com

DIP PACKAGE（D） Module Model Definition model=module-operation band RFM12 – 433-D/S Tel: +86-755-82973806 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com m o d u l e t y p e o p e r a t i o n b a n d P a c k a g e example：1，RFM12 module at 433MHz band, DIP : RFM12-433-D。 2 ，RFM12 module at 868MHZ band, SMD, thickness at 4.2mm: RFM12-868-S1。

Tel: +86-755-82973806 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com HOPE MICROELECTRONICS CO.,LTD Rm B.8/F LiJingGe Emperor Regency 6012 ShenNan Rd., Shenzhen,China Tel: 86-755-82973805 Fax: 86-755-82973550 Email: sales@hoperf.com trade@hoperf.com Website: http://www.hoperf.com http://hoperf.en.alibaba.com This document may contain preliminary information and is subject to change by Hope Microelectronics without notice. Hope Microelectronics assumes no responsibility or liability for any use of the information contained herein. Nothing in this document shall operate as an express or implied license or indemnity under the intellectual property rights of Hope Microelectronics or third parties. The products described in this document are not intended for use in implantation or other direct life support applications where malfunction may result in the direct physical harm or injury to persons. NO WARRANTIES OF ANY KIND, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MECHANTABILITY OR FITNESS FOR A ARTICULAR PURPOSE, ARE OFFERED IN THIS DOCUMENT. ©2006, HOPE MICROELECTRONICS CO.,LTD. All rights reserved.