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RF96/97/98

WIRELESS & SENSING

PRELIMINARY

DATASHEET

1. General Description

The RF96/97/98 incorporates the LoRaTM spread spectrum modem which is capable of achieving significantly longer

range than existing systems based on FSK or OOK modulation. With this new modulation scheme sensitivities 8 dB better

than FSK can be achieved with a low-cost, low-tolerance, crystal reference. This increase in link budget provides much

longer range and robustness without the need for external amplification. LoRaTM also provides significant advances in

selectivity and blocking performance, further improving communication reliability. For maximum flexibility the user may

decide on the spread spectrum modulation bandwidth (BW), spreading factor (SF) and error correction rate (CR). Another

benefit of the spread modulation is that each spreading factor is orthogonal - thus multiple transmitted signals can occupy

the same channel without interfering. This also permits simple coexistence with existing FSK based systems. Standard

GFSK, FSK, OOK, and GMSK modulation is also provided to allow compatibility with existing systems or standards such

as wireless MBUS and IEEE 802.15.4g.

The RF97 offers bandwidth options ranging from 7.8 kHz to 500 kHz with spreading factors ranging from 6 to 12, and

covering all available frequency bands. The RF97 offers the same bandwidth and frequency band options with spreading

factors from 6 to 9. The RF98 offers bandwidths and spreading factor options, but only covers the lower UHF bands.

1.1. Simplified Block Diagram

Figure 1. Block Diagram

RF96 데이터시트(PDF) 9 Page - HOPE Microelectronics CO., Ltd.