RFM12B Datasheet REV1.2 UNIVERSAL ISM BAND FSK TRANSCEIVER MODULE RFM12B （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 RF12B data sheets） RFM12B General Introduction RFM12B is a low costing ISM band transceiver module implemented with unique PLL. It works signal ranges from 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/output • 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) • Automatic frequency control (AFC) • Data quality detection (DQD) • Internal data filtering and clock recovery • RX synchron pattern recognition • SPI compatible serial control interface • Clock and reset signal output for external MCU use • 16 bit RX Data FIFO • Two 8 bit TX data registers • Standard 10 MHz crystal reference • Wakeup timer • 2.2V – 3.8V power supply • Low power consumption • Standby current less than 0.3uA • Supports very short packets (down to 3 bytes) Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com RFM12B Datasheet REV1.2 Typical Application： • Remote control • Remote sensor • Wireless data collection • Home security system • Toys • Tire pressure monitoring system Pin Definition： SMD DIP 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 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 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com RFM12B Datasheet REV1.2 Iin Input current except power ESD Human body model Tst Storage temperature Tld Soldering temperature(10s) -25 -55 25 mA 1000 V 125 ℃ 260 ℃ Recommended working range symbol parameter minimum maximum Unit Vdd Positive power supply 2.2 3.8 V Top Working temperature -40 85 ℃ DC characteristic symbol parameter Remark Idd_TX_0 Supply current (TX mode, Pout = 0dBm) Idd_TX_PMAX Idd_RX minimum typical maximum Unit 315,433MHz band 15 17 mA 868MHz band 16 18 915MHz band 17 19 Supply current 315,433MHz band 22 24 (TX mode, Pout = Pmax) 868MHz band 23 25 915MHz band 24 26 Supply current 315,433MHz band 11 13 (RX mode) 868MHz band 12 14 915MHz band 13 15 1.2 mA mA Ix Idle current Crystal oscillator on 0.62 Ipd Sleep mode current All blocks off 0.3 uA Ilb Low battery detection 0.5 uA Vlb Low battery detect 0.1V per step mA 2.2 3.7 V 0 5 % 0.3*Vdd V threshold Vlba Low battery detection accuracy Vil Low level input Vih High level input 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 0.7*Vdd V Vdd-0.4 V AC characteristic symbol parameter fref PLL frequency fLO remark min typical max Unit 9 10 11 MHz frequency 433 MHz band,2.5KHz step 430.24 439.7 (10MHz crystal 868 MHz band,5KHz step 860.48 5 used) 915 MHz band,7.5KHz step 900.72 879.5 1 929.2 7 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com MHz RFM12B Datasheet REV1.2 fLO frequency 433 MHz band,2.5KHz step 387.22 395.7 (9MHZ crystal 868 MHz band,5KHz step 774.43 6 used) 915 MHz band,7.5KHz step 810.65 791.5 MHz 6 836.3 4 fLO frequency 433 MHz band,2.5KHz step 473.26 483.7 (11MHZ crystal 868 MHz band,5KHz step 946.53 3 used) 915 MHz band,7.5KHz step 990.79 967.4 MHz 6 1022. 2 BW tlock Receiver mode 0 60 67 75 bandwidth mode 1 120 134 150 mode 2 180 200 225 mode 3 240 270 300 mode 4 300 350 375 mode 5 360 400 450 PLL lock time After 10MHz step hopping, frequency 30 KHz us error <10 kHz tst, P PLL startup time With a running crystal 200 oscillator BR Data rate With internal digital demodulator BRA Data rate With external RC filter 0.6 -3 Pmin AFCrange 300 115.2 kbps 256 kbps BER 10 , BW=134KHz,BR=1.2kbps, 433MHz band -109 -100 BER 10-3, BW=134KHz,BR=1.2kbps, 868MHz band -105 -100 BER 10-3, BW=134KHz,BR=1.2kbps, 915MHz band -105 -100 AFC working dfFSK : FSK deviation in the received 0.8* range signal dfFSK sensitivity us dBm RSA RSSI accuracy ±5 dB RSR RSSI range 46 dB CARSSI ARSSI filter 1 nF RSSTEP RSSI 6 dB 500 us programmable step RSRESP DRSSI response RSSI output high after valid , time CARRSI=5nF Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com RFM12B Datasheet REV1.2 AC characteristic(Transmitter) symbol Pmax Pout parameter Max. available output power Typical output power remark min typical 433MHz band 3 5 868MHz band 2 4 915MHz band 2 4 Selectable in 3 dB Pmax-21 max Unit dBm Pmax dbm pf steps Co Output capacitance In low bands 2 2.6 3.2 (set by the automatic antenna In high bands 2.1 2.7 3.3 Quality factor of the output In low bands 13 15 17 capacitance In high bands 8 10 12 tuning circuit) Qo Lout BRTX Output phase noise FSK bit rate 100 kHz from carrier -80 1 MHz from carrier -103 dbc/HZ Via internal TX data 172 kbps 256 kbps 240 kHZ register BRATX FSK bit rate TX data connected to the FSK input dffsk FSK frequency deviation Programmable in 15 15 kHz steps AC characteristic(Turn-on/Turnaround timings) symbol parameter remark min Tst Crystal oscillator Crystal ESR < 100 typical max Unit 1 5 ms startup time Transmitter Ttx_XTAL_ON turn-on off, crystal time oscillator on with 10 MHz step Receiver turn-on time Synthesizer Trx_XTAL_ON off, crystal oscillator on with 10 MHz step Transmitter Ttx_rx_SYNT_ON Synthesizer – Receiver turnover time Synthesizer and 250 us 250 us 150 us 150 us crystal oscillator on during TX/RX change with 10 MHz step Receiver Trx_tx_SYNT_ON Transmitter – turnover time Cxl tPOR Synthesizer and crystal oscillator on during RX/TX change with 10 MHz step Crystal load Programmable in 0.5 pF steps, capacitance tolerance+/- 10% Internal POR timeout 8.5 After Vdd has reached 90% of 16 pf 100 ms 1.05 ms 2 pf 10 ns final value tPBt Wake-up timer clock Calibrated every 30 seconds 0.96 period Cin, D Digital input apacitance tr, f Digital output rise/fall time 15pF pure capacitive load Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com RFM12B Datasheet REV1.2 Field testing range Band Test condition Distance 433MHz band Receiver bandwidth =67KHz, data rate=1.2kbps, transmitter frequency >200M deviation =45KHZ（matches with RFM12）In free open area 868MHz band Receiver bandwidth=67KHz,data rate =1.2kbps,Transmitter frequency >200M deviation =45KHZ（matches with RFM12）in free open area 915MHz band Receiver bandwidth=67KHz,data rate =1.2kbps,Transmitter frequency >200M deviation =45KHZ（matches with RFM12）in free open area SGS Reports Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com RFM12B Datasheet REV1.2 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com RFM12B Datasheet REV1.2 Mechanical Dimension （units in mm） SMD PACKAGE（S1） SMD PACKAGE（S2） Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com RFM12B Datasheet REV1.2 DIP PACKAGE（D） Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com RFM12B Datasheet REV1.2 Module Model Definition model=module-operation_band-package_type RFM12B – 433-D module type operation band Package example：1，RFM12B module at 433MHz band, DIP : RFM12B-433-D。 2，RFM12B module at 868MHZ band, SMD, thickness at 4.2mm: RFM12B-868-S1。 This document may contain preliminary information and is subject to change by Hope Microelectronics without notice. 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