ADL5920ACPZ-R7 datasheet(24/26 Pages) AD

24 / 26 page

ADL5920

Data Sheet

Rev. B | Page 24 of 26

Figure 45. Evaluation Board Layout, Component Side

Table 7. Evaluation Board Configuration and Operation

Component

Function Description/Comments

Default Value

VPOS, GND1, GND2, C1, C6, C9, C11, C14, C18

Power supply interface and decoupling. Apply a 5 V power

supply from the evaluation board to the VPOS and GND1/GND2

test loops (GND1 and GND2 are connected to a common ground).

The nominal supply decoupling on the VPOS1, VPOS2, and

VPOS3 pins consist of a 100 pF capacitor and a 0.1 µF capacitor

on each power supply pin, with the 100 pF capacitor placed

closer to the pin.

VPOS = 5 V,

GND1 = GND2 = 0 V,

C1, C9, C18 = 0.1 µF (0402),

C6, C11, C14 = 100 pF

(0402)

RFIN, RFOUT, C2, C19

RF inputs and outputs to bridge circuit. The main signal path is

ac-coupled by 0.01 µF, 0201 capacitors, setting the input corner

frequency to approximately 600 kHz. For operation at lower

frequencies, larger capacitor values can be installed. The RFIN

and RFOUT connectors are interchangeable, allowing the source

signal driven into RFOUT with the load connected to RFIN. The

RFIN and RFOUT connectors are 2.92 mm. Take care when

attaching to these connectors because of mechanical fragility.

C2 = C19 = 0.01 µF (0201),

RFIN, RFOUT = 2.92 mm

end launch connector

J1, J2, C20, C21

Calibration path. This path can calibrate out the insertion loss

of the RFIN and RFOUT traces. This signal path is ac-coupled by

0.01 µF, 0201 capacitors. The J1 and J2 connectors are 2.92 mm.

Take care when connecting to these connectors because of

mechanical fragility.

C20 = C21 = 0.01 µF

(0201), J1, J2 = 2.92 mm

end launch connector

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