ADL7078ACPZN-R7 datasheet(16/19 Pages) AD

16 / 19 page

Data Sheet

ADL7078

APPLICATIONS INFORMATION

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Rev. 0 | 16 of 19

The basic connections for operating the ADL7078 over the speci-

fied frequency range are shown in Figure 52. No external biasing

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

VDD pin. Power supply decoupling capacitors of 0.01 μF and 100

pF are recommended. No AC coupling capacitors are required on

RFIN or on RFOUT as long as these pins are connected to DC bias

levels of 0 V.

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

pins. A default value of 698 Ω is recommended, which results in a

nominal IDQ of 175 mA, supplying 5 V to VDD pin. Table 9 details

the resulting IDQ for various RBIAS values where the resistor is tied

to 5 V.

The circuit shown in Figure 52 represents the configuration used to

characterize and qualify the ADL7078.

Figure 52. Typical Application Circuit

To safely operate the ADL7078, apply RF power after the supply

voltage is connected to VDD and RBIAS and remove the RF power

before the supply voltage is removed from VDD and RBIAS.

Table 9. Recommended RBIAS Values for VDD = 5 V

RBIAS (Ω)

IDQ (mA)

IDQ_AMP (mA)

IRBIAS (mA)

498

200

194.5

5.5

698

175

170.5

4.5

883

150

146

3.8

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