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SY88903V Datasheet(PDF) 5 Page - Micrel Semiconductor

Part No. SY88903V
Description  5V/3.3V 1.25Gbps HIGH-SPEED LIMITING POST AMPLIFIER
Download  6 Pages
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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SY88903V Datasheet(HTML) 5 Page - Micrel Semiconductor

   
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5
SY88903V
Micrel, Inc.
M9999-041505
hbwhelp@micrel.com or (408) 955-1690
Output Termination
The SY88903V outputs must be terminated with a 50
load to V
CC –2V (or Thevenin equivalent).
Layout and PCB Design
Since the SY88903V 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.
DESIGN PROCEDURE
R1
R2
VREF
LOSLVL
VCC
Figure 3. LOSLVL Circut
50
50
0.1
µF
0.1
µF
0.1
µF
VREF
DIN–
DIN+
Figure 2. Differential Input Configuration
The SY88903V 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:
LOSLVS = VCC -1.32V +
R1 + R2
≥ 2.6kΩ
R2
× 1.32V
R1 + R2


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