Data Sheet

ADL8154

APPLICATIONS INFORMATION

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Rev. 0 | 20 of 23

The basic connections for operating the ADL8154 over the speci-

fied frequency range are shown in Figure 82, and it also shows the

configuration used to characterize and qualify the ADL8154.

To set ICQ, connect a resistor (R1) between the RBIAS and VCC1

and VCC2 pins. A default value of 680 Ω is recommended, which

results in a nominal ICQ of 125 mA. Table 9 shows how the ICQ and

ICQ _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.

Figure 83 shows an alternate application circuit for use when there

is a requirement to reduce the number of components around the

ADL8154 to save space. In this alternate application circuit, the

C4 and L2 components are removed, and L1 is changed from a

2.2 kΩ ferrite bead to a 900 nH wire wound inductor (Coilcraft

0402DF-901XJRW). S-parameter performance for the alternate ap-

plication circuit is shown in Figure 81. Compare Figure 81 to Figure

9 and Figure 12 to see that there is no performance impact on

the S-parameters compared to the nominal performance shown in

Figure 9 and Figure 12.

Figure 81. Broadband S-Parameters, L2 and C4 Removed, and L1 Changed

from 2.2 kΩ Ferrite Bead to 900 nH Wire Wound Inductor

Figure 82. Typical Application Circuit

Figure 83. Alternate Application Circuit, C4 and L2 Removed and L1 Changed from 2.2 kΩ Ferrite Bead to 900 nH Wire Wound Inductor