HFBR-24x6Z Low-Cost 125 MHz Receiver
Low-Cost, 820 nm Miniature Link Fiber Optic Components with FC Ports
Description
The HFBR-24x6Z fiber optic receiver is designed to operate with the Broadcom Ltd. HFBR-14xxZ fiber optic transmitters and 50/125 µm, 62.5/125 µm, 100/140 µm, and 200 µm Plastic-Clad Silica (PCS) fiber optic cable. Consistent coupling into the receiver is assured by the lensed optical system. Response does not vary with fiber size for core diameters of 100 µm or less. The receiver output is an analog signal which allows follow-on circuitry to be optimized for a variety of distance/data rate requirements. Low-cost external components can be used to convert the analog output to logic compatible signal levels for various data formats and data rates up to 175 MBaud. This distance/data rate trade-off results in increased optical power budget at lower data rates which can be used for additional distance or splices. The HFBR-24x6Z receiver contains a PIN photodiode and low noise transimpedance preamplifier integrated circuit. The HFBR- 24x6Z receives an optical signal and converts it to an analog voltage. The output is a buffered emitter follower. Because the signal amplitude from the HFBR-24x6Z receiver is much larger than from a simple PIN photodiode, it is less susceptible to EMI, especially at high signaling rates. For very noisy environments, the conductive or metal port option is recommended. A receiver dynamic range of 23 dB over temperature is achievable, assuming a Bit Error Rate (BER) of 10-9. The frequency response is typically DC to 125 MHz. Although the HFBR-24x6Z is an analog receiver, it is compatible with digital systems. A 10O resistor must be connected between pin 6 and the power supply, and a 100 nF ceramic bypass capacitor must be connected between the power supply and ground. In addition, pin 6 should be filtered to protect the receiver from noisy host systems. Refer to AN 1065 for details.
Features
• RoHS compliant
• Low-cost transmitters and receivers
• Choice of ST, SMA, SC, or FC ports
• 820 nm wavelength technology
• Signal rates up to 160 MBaud
• Link distances up to several kilometers
• Compatible with 50/125 µm, 62.5/125 µm, 100/140 µm, and 200 µm Plastic-Clad Silica (PCS) Fiber
• Repeatable ST connections within 0.2 dB typical
• Unique optical port design for efficient coupling
• Pick and place, and wave solderable
• No board-mounting hardware required
• Wide operating temperature range –40°C to +85°C
Applications
• 100BASE-SX Fast Ethernet on 850 nm
• Media/fiber conversion, switches, routers, hubs, and NICs on 100BASE-SX
• Local area networks
• Computer-to-peripheral links and computer monitor links
• Digital cross connect links
• Central office switch/PBX links
• Video links
• Modems and multiplexers
• Suitable for Tempest systems
•...
