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ADL5375ACPZ-R7 数据表(PDF) 30 Page - Analog Devices |
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ADL5375ACPZ-R7 数据表(HTML) 30 Page - Analog Devices |
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30 / 36 page  ADL5375 Data Sheet Rev. C | Page 30 of 36 EVALUATION BOARD Populated RoHS-compliant evaluation boards are available for evaluation of the ADL5375. The ADL5375 package has an exposed paddle on the underside. This exposed paddle should be soldered to the board for good thermal and electrical grounding. The evaluation board is designed to minimize LO feedthrough to RFOUT through PCB by placing LO block on the underside. And it can be configured to allow differential LO driving through balun or direct interfacing to the PLL evaluation board. It also reserves component pads in its LO path to accommodate a harmonic filter. One side placement of baseband inputs is to interface directly to DAC evaluation board. The ADL5375 evaluation board also includes an RF driver amplifier. The modulator output can be measured directly at the MOD_OUT SMA connector. Alternatively, by removing R1, and installing a 0 Ω resistor in the R2 pad, the modulator’s output can be fed to the RF driver amplifier. The evaluation board ships, installed with an ADL5320 driver amplifier (400 MHz to 2700 MHz RF driver amplifier). This device requires external matching components (C100 and C101) and is tuned by default for operation from 1805 MHz to 2170 MHz. For details on tuning component values for other frequencies, please refer to the ADL5320 data sheet (the driver amplifier section of the ADL5375 Evaluation Board is identical to the ADL5320 Evaluation Board). For higher frequency operation, the ADL5320 should be replaced by the ADL5321, which is specified to operate from 2.3 GHz to 4 GHz. If a broadband matched device is desired, the ADL5601 (15 dB) or ADL5602 (20 dB) broadband gain blocks can be used. VPS1 RFOUT COMM NC COMM NC NC DSOP R15 49.9Ω VPOS B A LOIP COMM LOIN COMM 1 2 3 4 5 6 18 17 16 15 14 13 C1 100pF R12 100Ω S1 C5 0.1µF C3 100pF VPOS EXPOSED PADDLE ADL5375 C2 100pF C4 0.1µF R6 10kΩ QBBN QBBP LOIP C7 100pF R16 D.N.I LOIN R7 100Ω IBBN IBBP VPOS RED 1 2 (2) 3 U2 ADL5320 C9 10µF C10 10nF C11 22pF L1 15nH VPOS_AMP RED C12 22pF C101 (C7) 1.5pF AMP_OUT C100 (C3) 0.5pF λ1 λ3 λ4 λ2 AGND DSOP YELLOW AGND R14 0Ω R19 R18 0Ω C17 D.N.I AGND AGND AGND AMP_IN MOD_OUT AGND AGND AGND AGND AGND AGND AGND VPOS R13 0Ω C6 100pF T1 TC1-1-43A+** C16 D.N.I R17* 0Ω 1 6 4 3 1 2 3 4 5 6 T2 3600BL14M050 T2A 5400BL15B050 JOHANSON TECHNOLOGY** NC R21* 0Ω R20 D.N.I R22** D.N.I R2 0Ω * SINGLE-ENDED LO DRIVING AT LOIP. ** DIFFERENTIAL LO DRIVING AT LOIP WITH T1 OR T2. *** ADL5320 STAND-ALONE TEST. C18 D.N.I AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND GND BLACK D.N.I R1*** D.N.I U1 Figure 75. ADL5375 Evaluation Board Schematic |
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