HFD3023

m o HFD3023 .c U 4 t e e h S a at .D w w w 5 Mbit Direct Coupled Receiver FEATURES Converts fiber optic input signals to TTL digital outputs Typical sensitivity 2 µW (-27 dBm) Single 5 V supply requirement Direct coupled receiver circuit Open collector output Plastic cap with TO-18 header Microlens optics for efficient fiber coupling Designed to operate with Honeywell 850 nm LEDs and integrated transmitters DESCRIPTION The HFD3023 is a sensitive Direct Coupled (DC) optical receiver designed for use in short distance, 850 nm fiber optic systems. The receiver contains a monolithic IC, consisting of a photodiode, DC amplifier, and open collector Schottky output transistor. The output allows it to be directly interfaced with standard TTL circuits. The HFD3023 receiver is supplied in a Honeywell plastic package, and can be mounted in several types of fiber optic connectors. APPLICATION The HFD3023 fiber optic receiver converts the optical signal in a point to point data communications fiber optic link to a TTL output. Its 0.006 in. photodiode with a 0.024 in. microlens (to enhance the optics) is mechanically centered within the TO-18 package. Electrical isolation is important in obtaining the maximum performance. A 0.1 µF bypass capacitor must be connected between VÙÙ and ground. This minimizes power supply noise, increasing the signal quality. Shielding can also reduce coupled noise, through use of ground plane PCB, shielding around the device, and shielding aro...