AN4110 Datasheet, PDF (1/18 Pages) STMicroelectronics – Using the SPIRIT1 transceiver under EN 300 220 at 868 MHz

AN4110
Application note
Using the SPIRIT1 transceiver under EN 300 220 at 868 MHz
By Placido De Vita
Introduction
The SPIRIT1 is a very low power RF transceiver, intended for RF wireless applications in the
sub-1 GHz band. It is designed to operate both in the licence-free ISM and SRD frequency
bands at 169, 315, 433, 868 and 915 MHz.
This application note outlines the expected performance when using the SPIRIT1 under EN
300 220-1 (v2.3.1, 2012-02) [2] in the 863 to 870 MHz band. This band is divided into sub-
bands where the application, the maximum radiated power, the channel spacing and/or the
mitigation requirement (duty cycle etc.) are different. The maximum allowed output power is
+27 dBm (500 mW) in 869.4 to 869.65 MHz, and it is variable in the other sub-bands (see
Table 5 in ETSI EN 300 220-1 v2.3.1 [2]). This application note relates to +10 dBm (10 mW)
applications.
For details on the regulatory limits in the 863.000 - 870.000 MHz SRD frequency bands,
please refer to the ETSI EN 300 220-1 v2.3.1 [2] and ERC recommendation 70-03 [3].
These can be downloaded from www.etsi.org and www.ero.dk respectively.
July 2012
Doc ID 023182 Rev 1
1/18
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