ADL8102ACPZN-R7 datasheet(20/23 Pages) AD

20 / 23 page

Data Sheet

ADL8102

APPLICATIONS INFORMATION

analog.com

Rev. 0 | 20 of 23

The basic connections for operating the ADL8102 over the speci-

fied frequency range are shown in Figure 75. No external biasing

inductor is required, which allows the 5 V supply to be connected to

the VDD pin. It is recommended to use 1 µF, 100 pF, and 1000 pF

power-supply decoupling capacitors. The power-supply decoupling

capacitors shown in Figure 75 represent the configuration used to

characterize and qualify the ADL8102.

To set IDQ, connect a resistor (R1) between the RBIAS and VDD

pins. A default value of 1150 Ω is recommended, which results in

a nominal IDQ of 110 mA. Table 1 shows how IDQ and IDQ_AMP vary

vs. RBIAS. The RBIAS pin also draws a current that varies with the

value of RBIAS (see Table 1). Do not leave the RBIAS pin open.

Correct sequencing of the DC and RF power is required to safely

operate the ADL8102. 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 75. Typical Application Circuit

For more information on using the evaluation board, refer to the

ADL8102-EVALZ user guide.

Table 9. Recommended RBIAS Values for VDD = 5 V

RBIAS (kΩ)

IDQ (mA)

IDQ_AMP (mA)

IRBIAS (mA)

5.3

39.2

0.8

3.72

48.9

1.1

2.24

68.3

1.7

1.84

1.54

87.75

2.25

1.15

110

107.15

2.85

0.85

130

126.55

3.45

0.65

150

146

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