ADL8104ACPZN-R7 datasheet(22/23 Pages) AD

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ADL8104

Data Sheet

Rev. 0 | Page 22 of 23

APPLICATIONS INFORMATION

The basic connections for operating the ADL8104 over the

specified frequency range are shown in Figure 87. No external

biasing inductor is required, allowing the 5 V supply to be

connected to the VDD pin. The 1 µF and 1000 pF power supply

decoupling capacitors are recommended. The power supply

decoupling capacitors shown in Figure 87 represent the

configuration used to characterize and qualify the ADL8104.

To set IDQ, connect a resistor, R1, between the RBIAS and VDD pins. A

default value of 90.9 Ω is recommended, which results in a

nominal IDQ of 150 mA. Table 9 shows how the IDQ and IDD varies

vs. the bias resistor value. The RBIAS pin also draws a current

that varies with the value of RBIAS (see Table 9). Do not leave the

RBIAS pin open.

90.9Ω

ADL8104

GND

1µF

1000pF

VDD

1000pF

GND

RFIN

RFOUT

GND

Figure 87. Typical Application Circuit

RECOMMENDED BIAS SEQUENCING

See the ADL8104-EVALZ user guide for the recommended bias

sequencing information.

Table 9. Recommended Bias Resistor Values

RBIAS (Ω)

IDQ (mA)

IDD (mA)

IRBIAS (mA)

165

157.3

7.7

150

144

440

125

120

1180

100

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