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ADMV1009AEZ-R7 数据表(PDF) 20 Page - Analog Devices |
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ADMV1009AEZ-R7 数据表(HTML) 20 Page - Analog Devices |
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20 / 23 page ![]() ADMV1009 Data Sheet Rev. B | Page 20 of 23 EVALUATION BOARD INFORMATION The circuit board used in the application must use RF circuit design techniques. Signal lines must have 50 Ω impedance, and the package ground leads and exposed pad must be connected directly to the ground plane, similar to what is shown in Figure 60 and Figure 61. Use a sufficient number of via holes to connect the top and bottom ground planes. The evaluation circuit board shown in Figure 59 is available from Analog Devices, Inc., upon request. Layout Solder the exposed pad on the underside of the ADMV1009 to a low thermal and electrical impedance ground plane. This pad is typically soldered to an exposed opening in the solder mask on the evaluation board. Connect these ground vias to all other ground layers on the evaluation board to maximize heat dissipation from the device package. Figure 60 shows the PCB land pattern footprint for the ADMV1009-EVALZ, and Figure 61 shows the solder paste stencil for the ADMV1009-EVALZ evaluation board. Power-On Sequence To set up the ADMV1009-EVALZ, take the following steps: 1. Power up the VGLO with a −1.5 V supply. 2. Power up the VDLO with a 5 V supply. 3. Adjust VGLO from −1.5 V to −0.5 V such that IDLO = 60 mA. 4. Power up VGRF with a −1.5 V supply. 5. Power up VDRF with a 5 V supply. 6. Adjust VGRF from −1.5 V to −0.5 V such that IDLO = 250 mA 7. Power up VGMIX with a −1.5 V supply. 8. Apply an LO signal. 9. Apply an IF signal. Power Off Sequence To turn off the ADMV1009-EVALZ, take the following steps: 1. Turn off the LO and IF signals. 2. Set VGRF and VGLO to −1.5 V. 3. Set the VDRF and VDLO supplies to 0 V and then turn off the VDRF and VDLO supplies. 4. Turn off the VGRF and VGLO supplies. 0.138" SQUARE MASK OPENING 0.02 × 45° CHAMFER FOR PIN 1 0.197" [0.50] PAD SIZE 0.026" × 0.010" 0.217" SQUARE 0.004" MASK/METAL OVERLAP 0.010" MINIMUM MASK WIDTH 0.010" REF 0.030" MASK OPENING 0.156" MASK OPENING PIN 1 GROUND PAD SOLDER MASK 0.146" SQUARE GROUND PAD ø.010" TYPICAL VIA ø.034" TYPICAL VIA SPACING Figure 60. PCB Land Pattern Footprint of the ADMV1009-EVALZ |
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