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AX5042 Datasheet(PDF) 13 Page - ON Semiconductor |
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AX5042 Datasheet(HTML) 13 Page - ON Semiconductor |
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13 / 42 page  Specifications www.onsemi.com AX5042 13 RF Frequency Generation Subsystem (Synthesizer) SYMBOL DESCRIPTION CONDITION MIN. TYP. MAX. UNIT fREF Reference frequency 16 MHz frange_hi Frequency range BANDSEL=0 800 930 MHz frange_low BANDSEL=1 400 470 MHz fRESO Frequency resolution 1 Hz BW1 Synthesizer loop bandwidth Internal loop filter, pin LPFILT is unconnected Loop filter configuration: FLT=01 Charge pump current: PLLCPI=111 default 100 kHz BW2 Loop filter configuration: FLT=01 Charge pump current: PLLCPI=001 50 BW3 Loop filter configuration: FLT=11 Charge pump current: PLLCPI=111 200 BW4 Loop filter configuration: FLT=10 Charge pump current: PLLCPI=111 500 Tset1 Synthesizer settling time for 1MHz step as typically required for RX/TX switching Internal loop filter, pin LPFILT is unconnected Loop filter configuration: FLT=01 Charge pump current: PLLCPI=111 15 μs Tset2 Loop filter configuration: FLT=01 Charge pump current: PLLCPI=001 30 Tset3 Loop filter configuration: FLT=11 Charge pump current: PLLCPI=111 7 Tset4 Loop filter configuration: FLT=10 Charge pump current: PLLCPI=111 3 Tstart1 Synthesizer start-up time if crystal oscillator and reference are running Internal loop filter, pin LPFILT is unconnected Loop filter configuration: FLT=01 Charge pump current: PLLCPI=111 default 25 μs Tstart2 Loop filter configuration: FLT=01 Charge pump current: PLLCPI=001 50 Tstart3 Loop filter configuration: FLT=11 Charge pump current: PLLCPI=111 12 Tstart4 Loop filter configuration: FLT=10 Charge pump current: PLLCPI=111 5 PN1868 Synthesizer phase noise Loop filter configuration: FLT=01 Charge pump current: PLLCPI=111 Internal loop filter, pin LPFILT is unconnected 868 MHz; 50 kHz from carrier -77 dBc/Hz 868 MHz; 100 kHz from carrier -75 868 MHz; 300 kHz from carrier -85 868 MHz; 2 MHz from carrier -100 PN1433 433 MHz; 50 kHz from carrier -85 433 MHz; 100 kHz from carrier -80 433 MHz; 300 kHz from carrier -90 433 MHz; 2 MHz from carrier -105 PN2868 Synthesizer phase noise Loop filter configuration: FLT=01 Charge pump current: PLLCPI=001 Internal loop filter, pin LPFILT is unconnected 868 MHz; 50 kHz from carrier -65 dBc/Hz 868 MHz; 100 kHz from carrier -90 868 MHz; 300 kHz from carrier -105 868 MHz; 2 MHz from carrier -110 PN2868 433 MHz; 50 kHz from carrier -75 433 MHz; 100 kHz from carrier -80 433 MHz; 300 kHz from carrier -93 433 MHz; 2 MHz from carrier -115 |
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