RFM22B is a low-cost， high-performance ISM band RF transceiver module. RFM22B highly integrated， reducing BOM cost and simplifies product design， appropriate to shorten the development cycle. High sensitivity (-121dBm) and high power output (20dBm) feature extends the communication distance and significantly improves the quality of communication. diversity and support for frequency hopping function within the integrated antenna makes the performance can be further improved. Meanwhile， Maple also provides a simple and convenient calculator for quick configuration parameters in order to register simplify system design and reduce customers\' products to market cycles. 

Features: 

Frequency range :240-930MHz 

Sensitivity:-121dBm 

Maximum output power: 20dBm 

Low power consumption: 18.5mA (receiver); 85mA @ +20 dBm (transmit) 

:0.123-256kbps data transfer rate 

FSK， GFSK， and OOK modulation mode 

1.8-3.6 V power supply 

Ultra-low consumption shutdown mode 

Digital received signal strength indication (RSSI) 

Timed wake-up function 

Automatic frequency control (AFC) 

Power-on reset function

Automatic matching and bi-directional antenna switch control 

Configurable packet structure 

Preamble detection 

64-byte transmit and receive data register (FIFO) 

Low power detection 

Temperature sensor and 8-bit ADC 

Operating temperature range: -40 ~ +85 ° C 

Integrated Voltage Regulator 

Hopping function 

Built-crystal adjustment 

20-pin QFN package

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