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SI4022 датащи(PDF) 5 Page - Silicon Laboratories |
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SI4022 датащи(HTML) 5 Page - Silicon Laboratories |
5 / 22 page Si4022 DC Characteristics (continued) Symbol Parameter Conditions/Notes Min Typ Max Units Vil Digital input low level 0.3*Vdd V Vih Digital input high level 0.7*Vdd V Iil Digital input current Vil = 0 V -1 1 µA Iih Digital input current Vih = Vdd, Vdd = 3.8 V -1 1 µA Vol Digital output low level Iol = 2 mA 0.4 V Voh Digital output high level Ioh = -2 mA Vdd-0.4 V AC Characteristics Symbol Parameter Conditions/Notes Min Typ Max Units fLO Transmitter frequency 868 MHz band, 20 kHz resolution 915 MHz band, 20 kHz resolution 801.92 881.92 878.06 958.06 MHz fref PLL reference frequency (Note 1) 9 10 11 MHz fres PLL frequency resolution 20 kHz tlock PLL lock time Frequency error < 1kHz after 1 MHz step 30 μs tsp PLL startup time Initial calibration after power-up with running crystal oscillator 500 μs Cxl Crystal load capacitance, see crystal selection guide Programmable in 0.5 pF steps, tolerance +/- 10% 8.5 16 pF tPOR Internal POR pulse width (Note 2) After Vdd has reached 90% of final value 50 100 ms tsx Crystal oscillator startup time Crystal ESR < 100 2 5 ms tPBt Wake-up timer clock period Calibrated every 40 seconds (Note 3) 0.995 1 1.005 ms twake-up Programmable wake-up time 1 8.4*10 6 ms Note 1: Using anything but a 10 MHz crystal is allowed but not recommended because all crystal-referred timing and frequency parameters will change accordingly. Note 2: No command are accepted by the chip during this period. Note 3: Autocalibration can be turned off. |
Аналогичный номер детали - SI4022 |
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Аналогичное описание - SI4022 |
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