ADL5565

Rev. 0 | Page 22 of 28

LAYOUT CONSIDERATIONS

High-Q inductive drives and loads, as well as stray transmission

line capacitance in combination with package parasitics, can

potentially form a resonant circuit at high frequencies, resulting

in excessive gain peaking or possible oscillation. If RF transmission

lines connecting the input or output are used, design them such

that stray capacitance at the input/output pins is minimized. In

many board designs, the signal trace widths should be minimal

where the driver/receiver is no more than one-eighth of the

wave-length from the amplifier. This nontransmission line

configuration requires that underlying and adjacent ground and

low impedance planes be dropped from the signal lines.

0.1µF

0.1µF

0.1µF

0.1µF

ADL5565

VIP2

VIP1

VIN1

VOP

VON

VIN2

R6

R5

R4

R3

R2

R1

R8

R7

R10

R9

ETC1-1-13

ETC1-1-13

SPECTRUM

ANALYZER

Figure 42. General-Purpose Characterization Circuit

Table 11. Gain Setting and Input Termination Components for Figure 42

R1 (Ω)

R2 (Ω)

R3 (Ω)

R4 (Ω)

R5 (Ω)

R6 (Ω)

6

29

29

Open

0

0

Open

12

33

33

0

Open

Open

0

15.5

40.2

40.2

0

0

0

0

Table 12. Output Matching Network for Figure 42

R7 (Ω)

R8 (Ω)

R9 (Ω)

R10 (Ω)

200

84.5

84.5

34.8

34.8

ADL5565

VIP2

VIP1

VIN1

VOP

VON

VIN2

R6

R5

R4

R3

R2

R1

PORT 1

PORT 3

PORT 2

PORT 4

R8

R7

R10

R9

Figure 43. Differential Characterization Circuit Using Agilent E8357A Four-Port PNA

Table 13. Gain Setting and Input Termination Components for Figure 43

R1 (Ω)

R2 (Ω)

R3 (Ω)

R4 (Ω)

R5 (Ω)

R6 (Ω)

6

100

100

Open

0

0

Open

12

Open

Open

0

Open

Open

0

15.5

Open

Open

0

0

0

0

Table 14. Output Matching Network for Figure 43

R7 (Ω)

R8 (Ω)

R9 (Ω)

R10 (Ω)

200

50

50

Open

Open