SY88913KCTR(2005) 데이터 시트보기 (PDF) - Micrel

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SY88913KCTR
(Rev.:2005)

1.25Gbps HIGH-SPEED LIMITING POST AMPLIFIER

Micrel 

Micrel, Inc.

SY88913

APPLICATION NOTE

Output Termination

The SY88913 outputs must be terminated with a 50Ω

load to VCC – 2V (or Thevenin equivalent).

Layout and PCB Design

Since the SY88913 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.

The SY88913 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.

VCC

0.1µF

DIN+

R1

0.1µF

DIN–

50Ω

50Ω

0.1µF

VREF

LOSLVL

R2

VREF

Figure 1. Differential Input Configuration

Notes:

Resistor Divider = R2/ (R1 + R2)

R1 + R2 ≥ 5kΩ

Figure 2. LOSLVL Circut

M9999-081505

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

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