STEVAL-IKR001V8D SPIRIT1- low data rate transceiver - 868 MHz - daughterboard - range extender Data brief Description The STEVAL-IKR001V8D demonstration board is based on the SPIRIT1, a sub GHz low power, low data rate transceiver suitable for ISM bands and wireless M-BUS systems. The STEVAL-IKR001V8D includes an external power amplifier from SkyWorks , which allows the application to reach +27 dBm (500 mW) output power. STEVAL-IKR001V8 Features SPIRIT1 low power sub GHz transceiver in a standalone RF module tuned for 868 MHz band with external power amplifier Associated SPIRIT1 development kit, including documentation, firmware for STM32L and GUI Suitable for wireless M-BUS systems Modulation schemes: 2-FSK, GFSK, MSK, GMSK, OOK, and ASK Air data rate from 1 to 500 kbps TCXO for narrow band requirements Max P +27 dBm OUT Excellent receiver sensitivity (up to -123 dBm) TX power consumption +27 dBm: 350 mA SAW filter in reception path to prevent interference from out-of-band signals SkyWorks SEXXXXSL power amplifier Low duty cycle RX/TX operation mode Automatic acknowledgment, re-transmission and timeout protocol engine AES 128-bit encryption co-processor SPI interface for microcontroller RoHS compliant February 2015 DocID024307 Rev 3 1/5 For further information contact your local STMicroelectronics sales office. www.st.comSchematic diagram STEVAL-IKR001V8D 1 Schematic diagram Figure 1. STEVAL-IKR001V8D circuit schematic (1 of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ocID024307 Rev 3