ADL5566

Data Sheet

Rev. C | Page 20 of 24

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.

ANALYZER

AMPLIFIER 1

5.1nH

+

VIN_1

VIP_1

ETC1-1

ETC1-1

VCC

34.8Ω

0.1µF

0.1µF

+

–

½

ADL5566

AC

0.1µF

0.1µF

50Ω

50Ω

36Ω

36Ω

34.8Ω

84.5Ω

84.5Ω

0.1µF

Figure 49. General-Purpose Characterization Circuit

+

AC

50Ω

PORT 2

PORT 1

PORT 3

PORT 4

AC

50Ω

AC

50Ω

AMPLIFIER 1

5.1nH

VIN_1

VIP_1

VCC

0.1µF

0.1µF

+

–

½

ADL5566

AC

0.1µF

+

0.1µF

+

+

+

50Ω

36Ω

50Ω

50Ω

0.1µF

Figure 50. Differential Characterization Circuit Using Agilent E8357A Four-Port PNA

+

ANALYZER

AMPLIFIER 1

5.1nH

VIN_1

VIP_1

ETC1-1

ETC1-1

VCC

34.8Ω

0.1µF

0.1µF

+

–

ADL5566

AC

0.1µF

+

0.1µF

50Ω

50Ω

36Ω

36Ω

2kΩ

2kΩ

34.8Ω

84.5Ω

84.5Ω

0.1µF

VCOM

OUTPUT

INPUT

COMMON-MODE V

ADJUST

Figure 51. Distortion Measurement Circuit for Various Common-Mode Voltages