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AX-SF10-MINI21-868 Datasheet(PDF) 7 Page - ON Semiconductor |
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AX-SF10-MINI21-868 Datasheet(HTML) 7 Page - ON Semiconductor |
7 / 15 page 7 / 15 www.onsemi.com AX-SIGFOX-MODS/D BATTERY LIFE CALCULATION EXAMPLE Scenario for example calculation: • 2 AAA Alkaline batteries in series • One OOB frame transmission per day at 14 dBm output power • Four maximum length frames with downlink receive per day at 14 dBm output power • Device in sleep mode when no other activity • Neglecting battery self discharge 2 AAA alkaline capacity 1500 mAh * 3600 s/h 5400 C Sleep charge per day 1.6 μA * 86400 s 0.14 C/day OOB frame transmission 0.28 C/day Frame transmission with downlink 4 * 0.46 C/day 1.84 C/day Total charge consumption 2.26 C/day Battery life 6.5 years LOGIC SYM DESCRIPTION CONDITION MIN TYP MAX UNIT Digital inputs VT+ Schmitt trigger low to high threshold point VDD = 3.3 V 1.55 V VT- Schmitt trigger high to low threshold point 1.25 V VIL Input voltage, low 0.8 V VIH Input voltage, high 2.0 V VIPA Input voltage range, GPIO[3:0] -0.5 VDD V VIPBC Input voltage range, GPIO[9:4], UART_RX, RESET_N -0.5 5.5 V IL Input leakage current -10 10 μA RPU Programmable pull-up resistance 65 k Ω Digital outputs IOH Output current, high Ports GPIO[9:0], UART_TX, TX_LED, RX_LED, CPU_LED, RADIO_LED VOH = 2.4 V 8 mA IOL Output current, low GPIO[9:0], UARTTX, TXLED, RXLED, TXLED, CPULED VOL = 0.4 V 8 mA IOZ Tri-state output leakage current -10 10 μA TRANSMITTER SYM DESCRIPTION CONDITION MIN TYP MAX UNIT SBR Signal bit rate 100 bps fcarrier Carrier frequency 868.13 MHz PTXmin Lowest Transmitter output power AT$CW=868130000,1,0 0 dBm PTXmax Highest Transmitter output power AT$CW=868130000,1,14 14 dBm PTXstep Programming step size output power 1 dB dTXtemp Transmitter power variation vs. temperature -40 °C to +85 °C +/- 0.5 dB dTXVdd Transmitter power variation vs. VDD 1.8 to 3.3 V +/- 0.5 dB PTXharm2 Emission @ 2 nd harmonic -51 dBc PTXharm3 Emission @ 3 rd harmonic -63 dBc PTXharm4 Emission @ 4 th harmonic -84 dBc |
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