SY88943V データシートの表示（PDF） - Micrel

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SY88943V

5V/3.3V 2.5Gbps LIMITING POST AMPLIFIER WITH SIGNAL DETECT

Micrel 

Micrel, Inc.

SY88943V

DESIGN PROCEDURE

Output Termination

The SY88943V outputs must be terminated with a 50Ω

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

Layout and PCB Design

Since the SY88943V is a high-frequency component,

performance can be largely determined by the board layout

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

the feedback from the large swing outputs to the input via

the power supply.

The SY88943V 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.

0.1µF

0.1µF

DIN+

DIN–

50Ω

0.1µF

50Ω

VREF

VCC

R1

SDLVL

R2

VREF

Figure 2. Differential Input Configuration

Figure 3. SDLVL Circuit

Notes:

SDLVL = VCC -1.32V +

R1 + R2 ≥ 2.6kΩ

R2 × 1.32V

R1 + R2

M9999-082205

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

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