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Details, datasheet, quote on part number:QFBR-5594
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Datasheet text preview:
125 Megabaud Versatile Link The Versatile Fiber Optic Connection Technical Data
HFBR-0507 Series HFBR-15X7 Transmitters HFBR-25X6 Receivers
Features
· Data Transmission at Signal Rates of 1 to 125 MBd over Distances of 100 Meters · Compatible with Inexpensive, Easily Terminated Plastic Optical Fiber, and with Large Core Silica Fiber · High Voltage Isolation · Transmitter and Receiver Application Circuit Schematics and Recommended Board Layouts Available · Interlocking Feature for Single Channel or Duplex Links, in a Vertical or Horizontal Mount Configuration
· Reduction of Lightning and Voltage Transient Susceptibility
Description
The 125 MBd Versatile Link (HFBR-0507 Series) is the most cost-effective fiber-optic solution for transmission of 125 MBd data over 100 meters. The data link consists of a 650 nm LED transmitter, HFBR-15X7, and a PIN/preamp receiver, HFBR25X6. These can be used with low-cost plastic or silica fiber. One mm diameter plastic fiber provides the lowest cost solution for distances under 25 meters. The lower attenuation of silica fiber allows data transmission over longer distance, for a small difference in cost. These components can be used for high speed data links without the problems common with copper wire solutions, at a competitive cost. The HFBR-15X7 transmitter is a high power 650 nm LED in a low cost plastic housing designed to efficiently couple power into 1 mm diameter plastic optical fiber
Applications
· Intra-System Links: Boardto-Board, Rack-to-Rack · Telecommunications Switching Systems · Computer-to-Peripheral Data Links, PC Bus Extension · Industrial Control · Proprietary LANs · Digitized Video · Medical Instruments
and 200 µm Hard Clad Silica (HCS®) fiber. With the recommended drive circuit, the LED operates at speeds from 1-125 MBd. The HFBR-25X6 is a high bandwidth analog receiver containing a PIN photodiode and internal transimpedance amplifier. With the recommended application circuit for 125 MBd operation, the performance of the complete data link is specified for of 0-25 meters with plastic fiber and 0-100 meters with 200 µm HCS® fiber. A wide variety of other digitizing circuits can be combined with the HFBR-0507 Series to optimize performance and cost at higher and lower data rates.
HCS® is a registered trademark of Spectran Corporation.
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HFBR-0507 Series 125 MBd Data Link Data link operating conditions and performance are specified for the HFBR-15X7 transmitter and HFBR-25X6 receiver in the
recommended applications circuits shown in Figure 1. This circuit has been optimized for 125 MBd operation. The Applications Engineering Department in the Agilent Optical Communication
Division is available to assist in optimizing link performance for higher or lower speed operation.
Recommended Operating Conditions for the Circuits in Figures 1 and 2.
Parameter Ambient Temperature Supply Voltage Data Input Voltage Low Data Input Voltage High Data Output Load Signaling Rate Duty Cycle Symbol TA VCC VIL VIH RL fS D.C. Min. 0 +4.75 VCC -1.89 VCC -1.06 45 1 40 Max. 70 +5.25 VCC -1.62 VCC -0.70 55 125 60 Unit °C V V V MBd % Note 1 Note 2 Reference
Link Performance: 1-125 MBd, BER 10-9, under recommended operating conditions with
recommended transmit and receive application circuits. Parameter Optical Power Budget, 1 m POF Optical Power Margin, 20 m Standard POF Link Distance with Standard 1 mm POF Optical Power Margin, 25 m Low Loss POF Link Distance with Extra Low Loss 1 mm POF Optical Power Budget, 1 m HCS Optical Power Margin, 100 m HCS Link Distance with HCS Cable Symbol OPBPOF OPMPOF,20 l OPMPOF,25 l OPBHCS OPMHCS,100 l Min.[3] 11 3 20 3 25 7 3 100 Typ.[4] Max. 16 6 27 6 32 12 6 125 Unit dB dB m dB m dB dB m Note 5,6,7 Note 5,6,7 Note 5,6,7 Condition Reference Note 5,6,7 Note 5,6,7
Notes: 1. If the output of U4C in Figure 1, page 4 is transmitted via coaxial cable, terminate with a 50 resistor to VCC - 2 V. 2. Run length limited code with maximum run length of 10 µs. 3. Minimum link performance is projected based on the worst case specifications of the HFBR-15X7 transmitter, HFBR-25X6 receiver, and POF cable, and the typical performance of other components (e.g. logic gates, transistors, resistors, capacitors, quantizer, HCS cable). 4. Typical performance is at 25°C, 125 MBd, and is measured with typical values of all circuit components. 5. Standard cable is HFBR-RXXYYY plastic optical fiber , with a maximum attenuation of 0.24 dB/m at 650 nm and NA = 0.5. Extra low loss cable is HFBR-EXXYYY plastic optical fiber, with a maximum attenuation of 0.19 dB/m at 650 nm and NA = 0.5. HCS cable is HFBR-H/VXXYYY glass optical fiber, with a maximum attenuation of 10 dB/km at 650 nm and NA = 0.37. 6. Optical Power Budget is the difference between the transmitter output power and the receiver sensitivity, measured after 1 meter of fiber. The minimum OPB is based on the limits of optical component performance over temperature, process, and recommended power supply variation. 7. The Optical Power Margin is the available OPB after including the effects of attenuation and modal dispersion for the minimum link distance: OPM = OPB - (attenuation power loss + modal dispersion power penalty). The minimum OPM is the margin available for longterm LED LOP degradation and additional fixed passive losses (such as in-line connectors) in addition to the minimum specified distance.
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Plastic Optical Fiber (1 mm POF) Transmitter Application Circuit:
Performance of the HFBR-15X7 transmitter in the recommended application circuit (Figure 1) for POF; 1125 MBd, 25°C. Parameter Average Optical Power 1 mm POF Average Modulated Power 1 mm POF Optical Rise Time (10% to 90%) Optical Fall Time (90% to 10%) High Level LED Current (On) Low Level LED Current (Off) Optical Overshoot - 1 mm POF Transmitter Application Circuit Current Consumption - 1 mm POF Symbol Pavg Pmod tr tf IF,H IF,L ICC Typical -9.7 -11.3 2.1 2.8 19 3 45 110 Unit dBm dBm ns ns mA mA % mA Condition 50% Duty Cycle 5 MHz 5 MHz Note 3 Note 3 Figure 1 Note Note 1, Fig 3 Note 2, Fig 3
Hard Clad Silica Fiber (200 µm HCS) Transmitter Application Circuit: Performance of the HFBR-15X7 transmitter in the recommended application circuit (Figure 1) for HCS; 1-125 MBd, 25°C.
Parameter Average Optical Power 200 µm HCS Average Modulated Power 200 µm HCS Optical Rise Time (10% to 90%) Optical Fall Time (90% to 10%) High Level LED Current (On) Low Level LED Current (Off) Optical Overshoot - 200 µm HCS Transmitter Application Circuit Current Consumption - 200 µm HCS Symbol Pavg Pmod tr tf IF,H IF,L ICC Typical -14.6 -16.2 3.1 3.4 60 6 30 130 Unit dBm dBm ns ns mA mA % mA Condition 50% Duty Cycle 5 MHz 5 MHz Note 3 Note 3 Figure 1 Note Note 1, Fig 3 Note 2, Fig 3
Notes: 1. Average optical power is measured with an average power meter at 50% duty cycle, after 1 meter of fiber. 2. To allow the LED to switch at high speeds, the recommended drive circuit modulates LED light output between two non-zero power levels. The modulated (useful) power is the difference between the high and low level of light output power (transmitted) or input power (received), which can be measured with an average power meter as a function of duty cycle (see Figure 3). Average Modulated Power is defined as one half the slope of the average power versus duty cycle: [Pavg @ 80% duty cycle - Pavg @ 20% duty cycle] Average Modulated Power = -------------------------------------------- (2) [0.80 - 0.20] 3. High and low level LED currents refer to the current through the HFBR-15X7 LED. The low level LED "off" current, sometimes referred to as "hold-on" current, is prebias supplied to the LED during the off state to facilitate fast switching speeds.
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