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ADL5375-05ACPZ-R71 数据表(PDF) 26 Page - Analog Devices |
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ADL5375-05ACPZ-R71 数据表(HTML) 26 Page - Analog Devices |
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26 / 32 page  ADL5375 Rev. 0 | Page 26 of 32 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 –6 –4 –2 0 2 4 6 LO DRIVE (dBm) SYMBOL EVM COMPOSITE EVM Table 5. ADF4360-x Family Operating Frequencies Part Output Frequency Range (MHz) 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 AD9779 recommended in the previous sections of this data sheet is by no means the only DAC that can be used to drive the ADL5375. There are other appropriate DACs, depending on the level of performance required. Table 6 lists the dual TxDAC offered by Analog Devices. Figure 69. ADL5375-15 Single Carrier W-CDMA Composite and Symbol EVM vs. LO Drive at 2140 MHz; Output Power = −10 dBm The EVM exhibits moderate improvements with an increase in the LO drive. LO GENERATION USING PLLS Table 6. Dual TxDAC Selection Part Resolution (Bits) Update Rate (MSPS Minimum) AD9709 Analog Devices has a line of PLLs that can be used for generating the LO signal. Table 4 lists the PLLs together with their maximum frequency and phase noise performance. 8 125 AD9761 10 40 AD9763 10 125 AD9765 Table 4. Analog Devices PLL Selection 12 125 AD9767 Part Frequency, fIN (MHz) Phase Noise @ 1 kHz Offset and 200 kHz PFD (dBc/Hz) ADF4110 14 125 AD9773 12 160 AD9775 14 160 AD9777 550 −91 @ 540 MHz ADF4111 16 160 AD9776 1200 −87 @ 900 MHz ADF4112 12 1000 AD9778 3000 −90 @ 900 MHz ADF4113 14 1000 AD9779 4000 −91 @ 900 MHz ADF4116 16 1000 550 −89 @ 540 MHz ADF4117 1200 −87 @ 900 MHz ADF4118 All DACs listed have nominal bias levels of 0.5 V and use the same simple DAC modulator interface that is shown in Figure 60. 3000 −90 @ 900 MHz The ADF4360-x comes as a family of chips with nine operating frequency ranges. Choose chips depending on the local oscillator frequency required. While the use of the integrated synthesizer may come at the expense of slightly degraded noise performance from the ADL5375, it can be a cheaper alternative to a separate PLL and VCO solution. Table 5 shows the options available. MODULATOR/DEMODULATOR OPTIONS Table 7 lists other Analog Devices modulators and demodulators. Table 7. Modulator/Demodulator Options Part No. Modulator/ Demodulator Frequency Range (MHz) Comments AD8345 Modulator 140 to 1000 AD8346 Modulator 800 to 2500 AD8349 Modulator 700 to 2700 ADL5390 Modulator 20 to 2400 External quadrature ADL5385 Modulator 50 to 2200 ADL5370 Modulator 300 to 1000 ADL5371 Modulator 500 to 1500 ADL5372 Modulator 1500 to 2500 ADL5373 Modulator 2300 to 3000 ADL5374 Modulator 3000 to 4000 AD8347 Demodulator 800 to 2700 AD8348 Demodulator 50 to 1000 ADL5387 Demodulator 50 to 2000 AD8340 Vector modulator 700 to 1000 AD8341 Vector modulator 1500 to 2400 |
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