SFH551-1-1 Просмотр технического описания (PDF) - Infineon Technologies

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SFH551-1-1

Integrated Photo Detector Receiver for Plastic Fiber Plastic Connector Housing

Infineon Technologies 

Block Diagram

SFH551/1-1

SFH551/1-1V

Block Diagram

Vcc

Data-out

Rpullup

GND

Figure 1

A bypass capacitor (100 nF) near the device (distance ≤ 3 cm) is necessary between

ground and VCC. In critical applications the distance may be shorter.

Description

The SFH551/1V is a transimpedance amplifier with digital TTL open collector output

stage and integrated photodiode. The active area of the detector in connection with the

molded microlens gives an efficient coupling from the end of a plastic fiber.

The receiver is fully DC coupled and therefore no line code is needed.

The SFH551/1V includes a Schmitt trigger function to provide stable output states over

the whole dynamic range. For optical input power levels above 6 µW typically the

electrical output will be logical “low” and vice versa. With noise free Vcc and GND no

undefined output signal is possible. SFH551/1 must not be used without shielding the

ambient light, because ambient light causes malfunction when reaching the threshold

level, noise or complete switching the output. Interference free transmission is possible

by using the SFH551/1V with the black plastic connector housing.

Data Sheet

2

2005-06-09

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