4

SY88903

Micrel, Inc.

M9999-061907

hbwhelp@micrel.com or (408) 955-1690

Output Termination

The SY88903 outputs must be terminated with a 50Ω

Layout and PCB Design

Since the SY88903 is a high-frequency component,

performance can largely be determined by board layout

and design. A common problem with high-gain amplifiers is

feedback from the large swing outputs to the input via the

power supply.

0.1µF

0.1µF

0.1µF

Figure 2. Differential Input Configuration

APPLICATION INFORMATION

The SY88903 ground pin should be connected to the

circuit board ground. Use multiple PCB vias close to the

part to connect to ground. Avoid long, inductive runs which

can degrade performance.

NOTES:

Resistor Divider = R2/ (R1 + R2)

R1 + R2 ≥ 5kΩ

R1

R2