RFM65W RFM65W ISM RECEIVER MODULE V1.2 GENERAL DESCRIPTION The RFM65W is a low cost receiver module capable of operation in 315,433,868 and 915 MHz license-free ISM (Industry Scientific and Medical) frequency bands. All major RF communication parameters are programmable and most of them can be dynamically set. The RFM65W offers the unique advantage of programmable narrow-band and wide-band communication modes. The RFM65W is optimized for low power consumption while offering high RFM65W sensitivity and channelized operation. Compliance ETSI and FCC regulations. In order to better use RFM65W modules, this specification also involves a large number of the parameters and functions of its core chip RF65 s, including those IC pins which are not leaded out. All of these can help customers gain a better understanding of the performance of RFM65W modules, and enhance the application skills. KEY PRODUCT FEATURES APPLICATIONS z High Sensitivity: down to -120 dBm at 1.2 kbps z Automated Meter Reading z High Selectivity: 16-tap FIR Channel Filter z Wireless Sensor Networks z Bullet-proof front end: IIP3 = -18 dBm, IIP2 = +35 dBm, z Home and Building Automation 80 dB Blocking Immunity, no Image Frequency response z Wireless Alarm and Security Systems z Low current: Rx = 16 mA, 100nA register retention z Industrial Monitoring and Control z Constant RF performance over voltage range of module z FSK Bit rates up to 300 kb/s z Fully integrated synthesizer with a resolution of 61 Hz z FSK, GFSK, MSK, GMSK and OOK demodulation z Built-in Bit Synchronizer performing Clock Recovery z Incoming Sync Word Recognition z 115 dB+ Dynamic Range RSSI z Automatic RF Sense with ultra-fast AFC z Packet engine with CRC, AES-128 encryption and 66- byte FIFO z Built-in temperature sensor and Low Battery indicator z Module size:19.7X16mm Page 1 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales hoperf.com RFM65W ADVANCED COMMUNICATIONS & SENSING DATASHEET Table of Contents Page 1. General Description ................................................................................................................................................. 8 1.1. Simplified Block Diagram .................................................................................................................................8 1.2. Pin Diagram....................................................................................................................................9 1.3. Pin Description ...............................................................................................................................................10 2. Electrical Characteristics.......................................................................................................................................... 11 2.1. ESD Notice....................................................................................................................................................... 11 2.2. Absolute Maximum Ratings .......................................................................................................................... 11 2.3. Operating Range.............................................................................................................................................. 11 2.4. Chip Specification ................................................................................................................................ 12 2.4.1. Power Consumption ................................................................................................................................. 12 2.4.2. Frequency Synthesis ................................................................................................................................ 12 2.4.3. Receiver ..................................................................................................................................................... 13 2.4.4. Digital Specification .................................................................................................................................. 14 3. Chip Description...................................................................................................................................................... 15 3.1. Power Supply Strategy..................................................................................................................................... 15 3.2. Low Battery Detector........................................................................................................................................ 15 3.3. Frequency Synthesis........................................................................................................................................ 15 3.3.1. Reference Oscillator ................................................................................................................................. 15 3.3.2. CLKOUT Output .......................................................................................................................................16 3.3.3. PLL Architecture ......................................................................................................................................16 3.3.4. Lock Time .................................................................................................................................................17 3.3.5. Lock Detect Indicator................................................................................................................................. 17 3.4. Receiver Description ...............................................................................................................................17 3.4.1. Block Diagram ........................................................................................................................................... 17 3.4.2. LNA - Single to Differential Buffer .............................................................................................................18 3.4.3. Automatic Gain Control ............................................................................................................................. 18 3.4.4. Continuous-Time DAGC............................................................................................................................ 20 3.4.5. Quadrature Mixer - ADCs - Decimators..................................................................................................... 20 3.4.6. Channel Filter ............................................................................................................................................20 3.4.7. DC Cancellation ........................................................................................................................................21 3.4.8. Complex Filter - OOK ................................................................................................................................22 3.4.9. RSSI ............................................................................................................................................................ 22 3.4.10. Cordic ........................................................................................................................................................ 22 3.4.11. Bit Rate Setting .......................................................................................................................................22 3.4.12. FSK Demodulator ....................................................................................................................................23 3.4.13. OOK Demodulator ..................................................................................................................................24 3.4.14. Bit Synchronizer .................................................................................................................................... 26 3.4.15. Frequency Error Indicator....................................................................................................................... 26 3.4.16. Automatic Frequency Correction ............................................................................................................ 27 3.4.17. Optimized Setup for Low Modulation Index Systems ............................................................................. 28 Page 2 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales hoperf.com