RFM95 96 97 98W

1 Page 1 Tel: + 86- 755- 82973805 Fax: + 86- 755- 82973550 E- mail: ht tp:/ / RFM95 /96/97/98 W RFM95 /96/97/98(W) - Low Power Long Range Transceiver Module GENERAL DESCRIPTION The RFM95 /96/97/98(W) transceivers feature the LoRaTM long range modem that provides ultra-long range spread spectrum communication and high interference immunity whilst minimising current consumption. Using Hope RF s patented LoRaTM modulation technique RFM95 /96/97/98(W) can achieve a sensitivity of over -148dBm using a low cost crystal and bill of materials.

2 The high sensitivity combined with the integrated +20 dBm power amplifier yields industry leading link budget making it optimal for any application requiring range or robustness. LoRaTM also provides significant advantages in both blocking and selectivity over conventional modulation techniques, solving the traditional design compromise between range, interference immunity and energy consumption. These devices also support high performance (G)FSK modes for systems including WMBus, The RFM95 /96/97/98(W) deliver exceptional phase noise, selectivity, receiver linearity and IIP3 for significantly lower current consumption than competing devices.

3 KEY PRODUCT FEATURES LoRaTM Modem. 168 dB maximum link budget. +20 dBm - 100 mW constant RF output vs. V supply. +14 dBm high efficiency PA. Programmable bit rate up to 300 kbps. High sensitivity: down to -148 dBm. Bullet-proof front end: IIP3 = dBm. Excellent blocking immunity. Low RX current of mA, 200 nA register retention. Fully integrated synthesizer with a resolution of 61 Hz. FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation. Built-in bit synchronizer for clock recovery. Preamble detection. 127 dB Dynamic Range RSSI. Automatic RF Sense and CAD with ultra-fast AFC. Packet engine up to 256 bytes with CRC.

4 Built-in temperature sensor and low battery indicator. Modue Size 16*16mm APPLICATIONS Automated Meter Reading. Home and Building Automation. Wireless Alarm and Security Systems. Industrial Monitoring and Control Long range Irrigation Systems RFM95 /96/97/98(W) Page 2 Tel: + 86- 755- 82973805 Fax: + 86- 755- 82973550 E- mail: ht tp:/ / RFM95 /96/97/98 W Section Page 1.

5 General Description .. 9 Simplified Block Diagram .. 9 Product Versions ..10 Pin Diagram .. 10 Pin Description .. 11 2. Electrical Characteristics .. 12 ESD Notice .. 12 Absolute Maximum Ratings .. 12 Operating 12 Chip Specification ..13 Power Consumption .. 13 Frequency Synthesis .. 13 FSK/OOK Mode Receiver .. 14 FSK/OOK Mode Transmitter .. 15 Electrical specification for LoraTM modulation .. 16 Digital Specification .. 19 3. RFM95 /96/97/98(W) Features.

6 20 LoRaTM Modem .. 21 FSK/OOK Modem .. 21 4. RFM95 /96/97/98(W) Digital Electronics .. 22 The LoRaTM Modem .. 22 Link Design Using the LoRaTM Modem ..23 LoRaTM Digital Interface ..29 Operation of the LoRaTM Modem .. 31 Frequency Settings ..32 LoRaTM Modem State Machine Sequences ..33 FSK/OOK Modem .. 41 Bit Rate Setting .. 41 FSK/OOK Transmission .. 42 FSK/OOK Reception .. 43 Operating Modes in FSK/OOK Mode .. 50 Startup Times .. 50 Receiver Startup Options .. 53 Receiver Restart Methods .. 54 Top Level Sequencer.

7 55 Data Processing in FSK/OOK Mode .. 60 FIFO ..61 Digital IO Pins Mapping .. 64 Continuous Mode .. 65 Page 3 Tel: + 86- 755- 82973805 Fax: + 86- 755- 82973550 E- mail: ht tp:/ / RFM95 /96/97/98 W Section Page Packet Mode .. 66 io-homecontrol Compatibility Mode .. 74 SPI Interface .. 75 5. RFM95 /96/97/98(W) Analog & RF Frontend 76 Power Supply Strategy.

8 76 Low Battery Detector .. 76 Frequency Synthesis .. 76 Crystal Oscillator .. 76 CLKOUT Output .. 77 PLL .. 77 RC Oscillator .. 77 Transmitter Description ..78 Architecture Description .. 78 RF Power 78 High Power +20 dBm Operation .. 79 Over Current Protection ..80 Receiver Description .. 80 Overview .. 80 Receiver Enabled and Receiver Active States .. 80 Automatic Gain Control In FSK/OOK Mode .. 80 RSSI in FSK/OOK Mode .. 81 RSSI in LoRaTM Mode .. 82 Channel Filter .. 82 Temperature Measurement.

9 83 6. Description of the 84 Register Table Summary .. 84 FSK/OOK Mode Register 87 Band Specific Additional Registers .. 100 LoRaTM Mode Register Map .. 102 7. Application Information .. 108 Crystal Resonator Specification .. 108 Reset of the Chip .. 108 108 Manual Reset ..109 Top Sequencer: Listen Mode Examples .. 109 Wake on Preamble Interrupt .. 109 Wake on SyncAddress Interrupt ..112 Top Sequencer: Beacon Mode.

10 115 Timing 115 Page 4 Tel: + 86- 755- 82973805 Fax: + 86- 755- 82973550 E- mail: ht tp:/ / RFM95 /96/97/98(W) Section Page Sequencer 115 Example CRC Calculation ..117 Example Temperature Reading ..118 8. Packaging Information .. 119 Package Outline Drawing .. 119 Recommended Land Pattern .. 120 Page 5 Tel: + 86- 755- 82973805 Fax: + 86- 755- 82973550 E- mail: ht tp:/ / RFM95 /96/97/98(W) Section Page Table 1.