Preliminary Technical Data

ADL5321

Rev. PrB | Page 7 of 9

EVALUATION BOARD

The basic connections for operating the ADL5321 are shown in

Figure 8. The inputs and outputs should be ac coupled with

appropriately sized capacitors. DC bias is provided to the

amplifier via an inductor connected to the RF output pin. A bias

voltage of 5 V is recommended.

Figure 7. Evaluation Board Layout showing component placement 2500

MHz to 2700 MHz operation

1

2

(2)

3

ADL5321

C1

1.0 pF

C2

10 pF

C3

1.2 pF

C6 10 uF

C5 10 nF

C4 10 pF

L1

9.5 nH

Vsup

Gnd

1

2

3

4

RFIN

RFOUT

R1

0 ohm

Figure 8. Basic Connections default condition is for 2500 MHz to 2700 MHz

Table 4. Matching Component Spacing 2500 MHz - 2700 MHz

λ 2

λ 3

λ 4

240 mils

75 mils

89 mils

325 mils

Table 5. Evaluation Board Configuration Options 2500 MHz - 2700 MHz

Component

Function

Default Value

R1

jumper

0402 0 ohm

C1

Tuning capacitor

0402 1.0 pF

C2

AC - coupling capacitor

0402 10 pF

C3

Tuning capacitors

C3 0402 1.2 pF

C4, C5, C6

Power supply bypassing capacitors

C4 0603 10 pF

C5 0603 10 nF

C6 1206 10μF

L1

DC bias inductor

0603 9.5 nH

Vsup, Gnd

Power supply connections

Vsup red testloop

Gnd Black testloop