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AX8052F151 Datasheet(PDF) 16 Page - ON Semiconductor |
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AX8052F151 Datasheet(HTML) 16 Page - ON Semiconductor |
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16 / 51 page ![]() Specifications www.onsemi.com AX8052F151 16 4.3. AC Characteristics Crystal Oscillator (RF reference oscillator) SYMBOL DESCRIPTION CONDITION MIN TYP MAX UNIT fXTAL Crystal frequency Note 1, 3 15.5 16 25 MHz gmosc Transconductance oscillator AX5051_XTALOSCGM=0000 1 mS AX5051_XTALOSCGM=0001 2 AX5051_XTALOSCGM =0010 default 3 AX5051_XTALOSCGM =0011 4 AX5051_XTALOSCGM =0100 5 AX5051_XTALOSCGM =0101 6 AX5051_XTALOSCGM =0110 6.5 AX5051_XTALOSCGM =0111 7 AX5051_XTALOSCGM =1000 7.5 AX5051_XTALOSCGM =1001 8 AX5051_XTALOSCGM =1010 8.5 AX5051_XTALOSCGM =1011 9 AX5051_XTALOSCGM =1100 9.5 AX5051_XTALOSCGM =1101 10 AX5051_XTALOSCGM =1110 10.5 AX5051_XTALOSCGM =1111 11 Cosc Programmable tuning capacitors at pins CLK16N and CLK16P AX5051_XTALCAP=000000 default 2 pF AX5051_XTALCAP=111111 33 pF Cosc-lsb Programmable tuning capacitors, increment per LSB of AX5051_XTALCAP 0.5 pF fext External clock input (TCXO) Note 2, 3 15.5 16 25 MHz RINosc Input DC impedance 10 kΩ Notes 1. Tolerances and start-up times depend on the crystal used. Depending on the RF frequency and channel spacing the IC must be calibrated to the exact crystal frequency using the readings of the register AX5051_TRKFREQ 2. If an external clock is used, it should be input via an AC coupling at pin CLK16P with the oscillator powered up and AX5051_XTALCAP=000000 3. Lower frequencies than 15.5 MHz or higher frequencies than 25 MHz can be used. However not all typical RF frequencies can than be generated. |
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