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ADL8107ACPZN-R7 数据表(PDF) 21 Page - Analog Devices |
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ADL8107ACPZN-R7 数据表(HTML) 21 Page - Analog Devices |
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21 / 24 page ![]() Data Sheet ADL8107 APPLICATIONS INFORMATION analog.com Rev. 0 | 21 of 24 The basic connections for operating the ADL8107 over the speci- fied frequency range are shown in Figure 81. No external biasing inductor is required, allowing the 5 V supply to be connected to the VDD pin. It is recommended to use 0.1 µF and 100 pF power supply decoupling capacitors. The power supply decoupling capacitors shown in Figure 81 represent the configuration used to characterize and qualify the ADL8107. To set IDQ, connect a resistor (R2) between the RBIAS and VDD pins. A default value of 4.12 kΩ is recommended, which results in a nominal IDQ of 90 mA. Table 9 shows how the IDQ and IDQ_AMP varies vs. the RBIAS. The RBIAS pin also draws a current that varies with the value of RBIAS (see Table 9). Do not leave the RBIAS pin open. Correct sequencing of the dc and RF power is required to safely operate the ADL8107. During power up, apply VDD before the RF power is applied to RFIN, and during power off, remove the RF power from RFIN before VDD is powered off. Figure 81. Typical Application Circuit RECOMMENDED BIAS SEQUENCING See the ADL8107-EVALZ user guide for the recommended bias sequencing information. Table 9. Recommended Bias Resistor Values for VDD = 5 V RBIAS (kΩ) IDQ (mA) IDQ_AMP (mA) IRBIAS (mA) 1.74 110 108.06 1.94 2.13 105 103.34 1.66 2.67 100 98.61 1.39 3.32 95 93.84 1.16 4.12 90 89.0 1.0 5.11 85 84.2 0.8 6.57 80 79.36 0.64 8.45 75 74.5 0.5 11.3 70 69.6 0.4 15 65 64.7 0.3 20.8 60 59.78 0.22 29.8 55 54.85 0.15 53 50 49.91 0.09 64.9 45 44.93 0.07 102 40 39.95 0.05 169 35 34.97 0.03 301 30 29.98 0.02 |
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