STEVAL-IKR002V4B SPIRIT1 - low data rate transceiver - 868 MHz - daughterboard integrated balun Data brief Description The STEVAL-IKR002V4B evaluation daughterboard is based on the SPIRIT1, a subGHz low power, low data rate transceiver suitable for ISM bands and wireless M-BUS. The board is equipped with external balun, matching and filter in a single BALF-SPI-01D3 device which optimizes size, RF performances and number of external RF components (from 16 SMD passive components to just 1). Features • SPIRIT1 low power, sub-GHz transceiver in a standalone RF module tuned for the 868/915 MHz bands • External balun + matching + filter in a single component: BALF-SPI-01D3 • Suitable for wireless M-BUS systems • Associated SPIRIT1 development kit includes documentation, firmware for STM32L and GUI • Modulation schemes: 2-FSK, GFSK, MSK, GMSK, OOK, and ASK • Air data rate from 1 to 500 kbps • Very low power consumption (9 mA RX and 21 mA TX at +11 dBm) • Excellent performance of receiver sensitivity (up to -120 dBm) • Low duty cycle RX/TX operation mode • Automatic acknowledgment, retransmission, and timeout protocol engine • AES 128-bit encryption co-processor • SPI interface for microcontroller • RoHS compliant April 2014 DocID025769 Rev 2 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 2 4 6 8 10 1 3 5 7 9 R _0R 0_0402 R8 R _0R 0_0402 R7 R _0R 0_0402 R6 B2=433MHz B1=315MHz B0=169MHz SDO SDI SCLK CSn J7 HEADER 5X2 GPIO0 1 CSn SCLK SDI R _0R 0_0402 R9 C 10 B3=868/915MHz Mount resistor relative to used band SDn REXT TX SMPS2 SMPS1 L7 L_10U _0805 C_TBD_0402_C0G C 19 VCC_RF 21 11 12 13 14 15 C 21 C _100p_0402_C 0G C_100n_0402_X7R C0 XTAL C_10P_0402_C0G C_12P_0402_C0G C9 Y1 GPIO_0 SDO SPIRIT1 5 4 3 2 U1 C _330p_0402_C 0G C 22 SDn C 20 C_1U_0603_X7R NX3225GA-xxMHz (XTAL) SPIRIT_DUMMY1 SPIRIT_DUMMY3 GPIO3 GPIO2 GPIO1 2 J um per J6 HEADER 5X2 2 6 20 GPIO_1 XOUT 19 GPIO_2 XIN 7 18 GPIO_3 VBAT2 8 U2 17 VREG RXP 9 1 GND 2 4 6 8 10 1 3 5 7 9 16 VBAT1 RXN 10 1 A2 GND2 RX_P A1 VCC_RF B2 B1 nS C2 RX_N DocID025769 Rev 2 ANT 2/4 L8 3 BALF-SPI-01D3 BAL J1 R 13 1 2 3 4 VCC_RF U3 M95640 8 7 6 5 C 13 C_TBD_0402_X7R C 23 C_100n_0402_X7R R 12 R _100k _0402 3V3 C 12 C_100n_0402_X7R SCLK SDI R 14 R _100k _0402 nS Vcc Q nHOLD nW C D Vss C 11 C_1U_0603_X7R nS SDO C 16 C_100n_0402_X7R R _100k _0402 C _220p_0402_C 0G Cx D0 1 2 L_TBD_0402 RF_IN/OUT TX GSPG0310DI1110 GND1 1 C1 3V3 Schematic diagram STEVAL-IKR002V4B Schematic diagram Figure 1. STEVAL-IKR002V4B circuit schematic STEVAL-IKR002V4B 2 Revision history Revision history Table 1. Document revision history Date Revision Changes 08-Jan-2014 1 Initial release. 02-Apr-2014 2 Title has been modified. DocID025769 Rev 2 3/4 4 STEVAL-IKR002V4B Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. 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