ADL8141ACPZN-R7 datasheet(19/22 Pages) AD

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Data Sheet

ADL8141

APPLICATIONS INFORMATION

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Rev. 0 | 19 of 22

The basic connections for operating the ADL8141 over the speci-

fied frequency range are shown in Figure 72. No external biasing

inductor is required, allowing the 2 V supply to be connected to the

VDD pin. Power supply decoupling capacitors of 0.1 µF and 100 pF

are recommended. The power supply decoupling capacitors shown

in Figure 72 represent the configuration used to characterize and

qualify the ADL8141.

To set the IDQ, connect a resistor, R2, between the RBIAS and VDD

pins. A default value of 768 Ω is recommended, which results in

a nominal IDQ of 25 mA. The RBIAS pin also draws a current that

varies with the value of RBIAS, and this current is typically a few mA.

Do not leave the RBIAS pin open.

The RFIN and RFOUT pins are internally AC-coupled. If the

RFOUT pin is connected to a DC bias level other than 0 V,

AC-couple the RFOUT pin because of the internal DC path to

ground on RFOUT.

Figure 72. Typical Application Circuit

RECOMMENDED BIAS SEQUENCING

See the ADL8141-EVALZ user guide for the recommended bias

sequencing information.

Table 9. Recommended Bias Resistor Values for VDD = 2 V

RBIAS (Ω)

IDQ (mA)

IDQ_AMP (mA)

IRBIAS (mA)

1582

1142

18.7

1.3

768

589

27.7

2.3

460

32.1

2.9

370

36.5

3.49

304

40.9

4.07

254

45.39

4.67

215

49.79

5.27

184

54.17

5.86

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