ADL9005ACPZN-R7 datasheet(23/24 Pages) AD

tên linh kiện	ADL9005ACPZN-R7

Giải thích chi tiết về linh kiện	Wideband, Low Noise Amplifier, Single Positive Supply, 0.01 GHz to 26.5 GHz

PDF	24 Pages

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23 / 24 page

Data Sheet

ADL9005

APPLICATIONS INFORMATION

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Rev. A | 23 of 24

PROVIDING DRAIN BIAS THROUGH THE

ACG4/VDD2 PIN

An alternative way to bias the ADL9005 is through the ACG4/VDD2

pin (Pin 24), which is shown in Figure 78. Because of the voltage

drop across the internal bias resistor, a higher VDD is required. If a

300 Ω bias resistor (R1) is used and connected to the 5 V power

supply, which results in a total current of 80 mA, a VDD of 8.5 V is

recommended. R1 can also be connected to the VDD of 8.5 V. In

this case, to set IDQ to 80 mA, use an R1 value of 850 Ω on RBIAS.

The performance of this circuit is summarized in Figure 67 to Figure

72.

Figure 78. Providing Resistive Drain Bias Through the ACG4/VDD2 Pin

POWER-UP AND POWER-DOWN SEQUENCING

Apply the RF input signal after the main supply voltage and the

voltage driving RBIAS (R1 in Figure 74 and Figure 78) and remove

the RF input signal before the main supply voltage and the voltage

on RBIAS are turned off. The voltage on RBIAS can either be applied

simultaneously with VDD or after VDD is applied.

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