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ADF4355-2BCPZ Datasheet(PDF) 6 Page - Analog Devices |
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ADF4355-2BCPZ Datasheet(HTML) 6 Page - Analog Devices |
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6 / 38 page  Data Sheet ADF4355-2 Rev. B | Page 5 of 37 Parameter Symbol Min Typ Max Unit Test Conditions/Comments RF OUTPUT CHARACTERISTICS VCO Frequency Range 3400 6800 MHz Fundamental VCO range RF Output Frequency 53.125 4400 MHz VCO Sensitivity KV 15 MHz/V Frequency Pushing (Open-Loop) 15 MHz/V Frequency Pulling (Open-Loop) 0.5 MHz Voltage standing wave ratio (VSWR) = 2:1 Harmonic Content Second −27 dBc Fundamental VCO output (RFOUTA+) −22 dBc Divided VCO output (RFOUTA+) Third −20 dBc Fundamental VCO output (RFOUTA+) −12 dBc Divided VCO output (RFOUTA+) RF Output Power5 8 dBm RFOUTA+ = 1 GHz 3 dBm RFOUTA+/RFOUTA− = 4.4 GHz RF Output Power Variation ±1 dB RFOUTA+/RFOUTA− = 4.4 GHz RF Output Power Variation (over Frequency) ±3 dB RFOUTA+/RFOUTA− = 1 GHz to 4.4 GHz Level of Signal with RF Output Disabled −60 dBm RFOUTA+/RFOUTA− = 1 GHz, VCO = 4 GHz −30 dBm RFOUTA+/RFOUTA− = 4.4 GHz, VCO = 4.4 GHz NOISE CHARACTERISTICS Fundamental VCO Phase Noise Performance VCO noise in open-loop conditions −116 dBc/Hz 100 kHz offset from 3.4 GHz carrier −136 dBc/Hz 800 kHz offset from 3.4 GHz carrier −138 dBc/Hz 1 MHz offset from 3.4 GHz carrier −155 dBc/Hz 10 MHz offset from 3.4 GHz carrier −113 dBc/Hz 100 kHz offset from 5.0 GHz carrier −133 dBc/Hz 800 kHz offset from 5.0 GHz carrier −135 dBc/Hz 1 MHz offset from 5.0 GHz carrier −153 dBc/Hz 10 MHz offset from 5.0 GHz carrier −110 dBc/Hz 100 kHz offset from 6.8 GHz carrier −130 dBc/Hz 800 kHz offset from 6.8 GHz carrier −132 dBc/Hz 1 MHz offset from 6.8 GHz carrier −150 dBc/Hz 10 MHz offset from 6.8 GHz carrier Normalized In-Band Phase Noise Floor Fractional Channel6 −221 dBc/Hz Integer Channel7 −223 dBc/Hz Normalized 1/f Noise, PN1_f8 −116 dBc/Hz 10 kHz offset; normalized to 1 GHz Integrated RMS Jitter 150 fs Spurious Signals due to Phase Frequency Detector (PFD) Frequency −80 dBc 1 VCP is the voltage at the CPOUT pin. 2 IOL is the output low current. 3 TA = 25°C; AVDD = DVDD = VRF = 3.3 V; VVCO = VP = 5.0 V; prescaler = 4/5; fREFIN = 122.88 MHz; fPFD = 61.44 MHz; and fRF = 1650 MHz. 4 The value measured varies between 16, 20, 42, and 55, depending on the RF output stage power programmable level per Bit DB4 and DB5 in Register 6. 5 RF output power using the EV-ADF4355-2SD1Z evaluation board measured into a spectrum analyzer, with board and cable losses de-embedded. The EV-ADF4355-2SD1Z RF outputs are pulled up externally using a 7.4 nH inductor. Unused RF output pins are terminated in 50 Ω. 6 Use this figure to calculate the phase noise for any application. To calculate in-band phase noise performance as seen at the VCO output, use the following formula: −221 + 10log(fPFD) + 20logN. The value given is the lowest noise mode for the fractional channel. 7 Use this figure to calculate the phase noise for any application. To calculate in-band phase noise performance as seen at the VCO output, use the following formula: −223 + 10log(fPFD) + 20logN. The value given is the lowest noise mode for the integer channel. 8 The PLL phase noise is composed of 1/f (flicker) noise plus the normalized PLL noise floor. The formula for calculating the 1/f noise contribution at an RF frequency (fRF) and at a frequency offset (f) is given by PN = P1_f + 10log(10 kHz/f) + 20log(fRF/1 GHz). Both the normalized phase noise floor and flicker noise are modeled in the ADIsimPLL design tool. |
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