SFH551-1-1 查看數據表（PDF） - Avago Technologies

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SFH551-1-1

Receiver with Digital Output Stage for Polymer Optical Fiber Applications

Avago Technologies 

SFH551/1-1

The transparent plastic package has an aperture where a

2.2 mm fiber end can be inserted. This coupling method

is very easy and extremely cost-effective.

SFH551/1-1V

The V-housing allows easy coupling of unconnectorized

2.2 mm polymer optical fiber by an axial locking screw.

The SFH551/1-1 receiver is a transimpedance amplifier

with a TTL open-collector output stage, therefore a

pull-up resistor of at least 330 Ω is necessary (see Figure

1). To minimize interference a bypass capacitor (100 nF)

must be placed near (distance ≤ 3 cm) the SFH551/1-1

ports. In critical applications a shorter distance is better.

Functionality

The SFH551/1-1 photodiode is silicon based and directly

connected to a transimpedance amplifier that works as

a pre-amplifier. A differential amplifier is connected in

series and works as a post-amplifier. Its output is passed

to the internal Schmitt trigger that drives a bipolar NPN

transistor. The data-out signal is from the collector of this

bipolar transistor.

VCC

Data-out

Rpullup

GND

Package Dimensions

SFH551/1-1

A

Figure 1. Equivalent circuit diagram (simplified)

surface not flat

8.6

7.65

4.6

view from A

0.5

1.5

24.5

Dimensions in mm

SFH551/1-1V

24.0

13.5

5.3

12.2

9.0

DATA

0.5

7.62

spacing

∅ 0.6

Dimensions in mm

2

locking screw

SFH551/1-1

component

0.55

0.5

Vcc GND DATA

2.54

5.08

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