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ADL5385ACPZ-R7 データシート(PDF) 20 Page - Analog Devices |
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ADL5385ACPZ-R7 データシート(HTML) 20 Page - Analog Devices |
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20 / 24 page  ADL5385 Data Sheet Rev. D | Page 20 of 24 LO GENERATION USING PLLs Analog Devices has a line of phase-locked loops (PLLs) that can be used for generating the LO signal. Table 4 lists the PLLs together with their maximum frequency and phase noise performance. Table 4. PLL Selection Table Device Frequency fIN (MHz) At 1 kHz Phase Noise dBc/Hz, 200 kHz PFD ADF4110 550 −91 at 540 MHz ADF4111 1200 −87 at 900 MHz ADF4112 3000 −90 at 900 MHz ADF4113 4000 −91 at 900 MHz ADF4116 550 −89 at 540 MHz ADF4117 1200 −87 at 900 MHz ADF4118 3000 −90 at 900 MHz The ADF4360-0 through the ADF4360-8 (see Table 5 for the full list of devices included in this range) come as a family of chips, with nine operating frequency ranges. One device can be chosen depending on the local oscillator frequency required. While the use of the integrated synthesizer might come at the expense of slightly degraded noise performance from the ADL5385, it can be a cheaper alternative to a separate PLL and VCO solution. Alternatively, the ADF4351 can be used, which covers a frequency range of 35 MHz to 4400 MHz. Table 5 shows the options available. Table 5. PLL/VCO Family Operating Frequencies Device Output Frequency Range (MHz) ADF4351 35 to 4400 ADF4360-0 2400 to 2725 ADF4360-1 2050 to 2450 ADF4360-2 1850 to 2150 ADF4360-3 1600 to 1950 ADF4360-4 1450 to 1750 ADF4360-5 1200 to 1400 ADF4360-6 1050 to 1250 ADF4360-7 350 to 1800 ADF4360-8 65 to 400 TRANSMIT DAC OPTIONS The AD9777 recommended in the previous sections is by no means the only DAC that can be used to drive the ADL5385. There are other appropriate DACs depending on the level of performance required. Table 6 lists the dual TxDACs that Analog Devices offers. Table 6. Dual TxDAC Selection Table Device Resolution (Bits) Update Rate (MSPS Minimum) AD9709 8 125 AD9761 10 40 AD9763 10 125 AD9765 12 125 AD9767 14 125 AD9773 12 160 AD9775 14 160 AD9777 16 160 AD9776 12 1000 AD9778 14 1000 AD9779 16 1000 AD9122 16 1200 All DACs listed have nominal bias levels of 0.5 V and use the same DAC-modulator interface shown in Figure 33. MODULATOR/DEMODULATOR OPTIONS Table 7 lists other Analog Devices discrete modulators and demodulators. Table 7. Modulator/Demodulator Options Device Mod/Demod Frequency Range (MHz) Comments AD8345 Mod 140 to 1000 AD8346 Mod 800 to 2500 AD8349 Mod 700 to 2700 ADL5390 Mod 20 to 2400 External quadrature ADL5370 Mod 300 to 1000 ADL5371 Mod 500 to 1500 ADL5372 Mod 1500 to 2500 ADL5373 Mod 2300 to 3000 ADL5375 Mod 400 to 6000 ADL5386 Mod 50 to 2200 Includes VVA and AGC AD8347 Demod 800 to 2700 AD8348 Demod 50 to 1000 ADL5380 Demod 400 to 6000 ADL5382 Demod 700 to 2700 ADL5387 Demod 30 to 2000 AD8340 Vector mod 700 to 1000 AD8341 Vector mod 1500 to 2400 |
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