The SFH551/1-1 receiver is a transimpedance amplifier with an integrated photodiode and TTL open-collector output stage. The active area of this detector combined with the molded microlens gives an efficient coupling from the end of the polymer optical fiber. This receiver enables data rates up to 5 MBd and works with the SFH757 transmitter diode. The SFH551/1-1 is fully DC coupled and therefore no line code is needed. The internal Schmitt trigger ensures stable output states over the whole dynamic range. If light with intensity above the threshold level is coupled into the SFH551/1-1, the electrical output will be logical “low” and vice versa. With noisefree Vcc and GND, an undefi ned output signal is not possible. Nevertheless, the SFH551/1-1 must not be used without shielding from ambient light. If ambient light could reach the threshold level, the SFH551/1-1V component should be chosen. The plastic connector housing of the SFH V-series shields the ambient light perfectly SFH series components are optimized for easy coupling. No fiber stripping is required; just insert the cut fiber into the selected SFH component.
Bipolar IC with open-collector output
Digital output, full TTL compatible
Sensitive in visible and near IR range
Transfer rate ≤ 5MBd
Low switching threshold
2.2mm aperture holds standard 980/1000/2200μm plastic fibers