ADL8122ACPZN-R7 datasheet(25/28 Pages) AD

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Data Sheet

ADL8122

APPLICATIONS INFORMATION

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Rev. 0 | 25 of 28

OPERATION FROM 10 KH

z TO 10 GHz

Figure 97 shows the application circuit that was used to extend

operation down to 10 kHz. Note that additional components, R2 and

R3 = 300 Ω, L5 and L6 = 680 μH, C5 = 1 μF, and L4 = 2.2 kΩ

at 100 MHz, have been added to support low frequency operation.

The gain and the return loss of this circuit are shown in Figure 95

and Figure 96.

Figure 95. Gain and Return Loss vs. Frequency of 10 kHz to 10 GHz

Application Circuit, 10 kHz to 200 MHz, VDD = 5 V,

IDQ = 95 mA, RBIAS = 620 Ω

Further adjustments can be made to the external components of

the device to operate at even lower frequencies. Specifically, the

DC blocking capacitor values can be increased because these

components are the limiting factor causing the low frequency cutoff.

Figure 96. Gain and Return Loss vs. Frequency of 10 kHz to 10 GHz

Application Circuit, 200 MHz to 12 GHz, VDD = 5 V,

IDQ = 95 mA, RBIAS = 620 Ω

Figure 97. Typical Application Circuit for Operation from 10 kHz to 10 GHz

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