HFBR-0507 Series HFBR-15X7 Transmitters HFBR-25X6 Receivers 125 Megabaud Versatile Link The Versatile Fiber Optic Connection Data Sheet Description Features 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, HFBR-25X6. 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. Data Transmission at Signal Rates of 1 to 125 MBd over Distances of 100 Meters 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 and 200 mm 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 mm 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. Intra-System Links: Boardto-Board, Rack-to-Rack HCS is a registered trademark of Spectran Corporation. 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 Applications Telecommunications Switching Systems Computer-to-Peripheral Data Links, PC Bus Extension Industrial Control Proprietary LANs Digitized Video Medical Instruments Reduction of Lightning and Voltage Transient Susceptibility HFBR-0507 Series 125 MBd Data Link Data link operating conditionsand 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 forhigher or lower speed operation. Recommended Operating Conditions for the Circuits in Figures 1 and 2. Parameter Symbol Min. Max. Unit Ambient Temperature TA 0 70 C Supply Voltage VCC +4.75 +5.25 V Data Input Voltage - Low VIL VCC-1.89 VCC-1.62 V Data Input Voltage - High VIH VCC-1.06 VCC-0.70 V Reference Data Output Load RL 45 55 Signaling Rate fS 1 125 MBd Duty Cycle D.C. 40 60 % Note 1 Note 2 Link Performance: 1-125 MBd, BER 10-9, under recommended operating conditions withrecommended transmit and receive application circuits. Parameter Symbol Min.[3] Typ.[4] Optical Power Budget, 1 m POF OPBPOF 11 16 dB Note 5, 6, 7 Optical Power Margin, 20 m Standard POF OPMPOF,20 3 6 dB Note 5, 6, 7 Link Distance with Standard 1 mm POF 1 20 27 m Optical Power Margin, 25 m Low Loss POF OPMPOF,25 3 6 dB Link Distance with Extra Low Loss 1 mm POF 1 25 32 m Optical Power Budget, 1 m HCS OPBHCS 7 12 dB Note 5, 6, 7 Optical Power Margin, 100 m HCS OPMHCS,100 3 6 dB Note 5, 6, 7 Link Distance with HCS Cable 1 100 125 m Max. Unit Condition Reference 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 s. 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. 2 Plastic Optical Fiber (1 mm POF) Transmitter Application Circuit: Performance of the HFBR-15X7 transmitter in the recommended application circuit (Figure 1) for POF; 1-125 MBd, 25 C. Parameter Symbol Typical Unit Condition Note Average Optical Power 1 mm POF Pavg -9.7 dBm 50% Duty Cycle Note 1, Fig 3 Average Modulated Power 1 mm POF Pmod -11.3 dBm Optical Rise Time (10% to 90%) tr 2.1 ns 5 MHz Optical Fall Time (90% to 10%) tf 2.8 ns 5 MHz High Level LED Current (On) IF,H 19 mA Note 3 Low Level LED Current (Off ) IF,L 3 mA Note 3 45 % 110 mA Optical Overshoot - 1 mm POF Transmitter Application Circuit Current Consumption - 1 mm POF ICC Note 2, Fig 3 Figure 1 Hard Clad Silica Fiber (200 m HCS) Transmitter Application Circuit: Performance ofthe HFBR-15X7 transmitter in the recommended application circuit (Figure 1) for HCS; 1-125 MBd, 25 C. Parameter Symbol Typical Unit Condition Note Average Optical Power 200 m HCS Pavg -14.6 dBm 50% Duty Cycle Note 1, Fig 3 Average Modulated Power 200 m HCS Pmod -16.2 dBm Optical Rise Time (10% to 90%) tr 3.1 ns 5 MHz Optical Fall Time (90% to 10%) tf 3.4 ns 5 MHz High Level LED Current (On) IF,H 60 mA Note 3 Low Level LED Current (Off ) IF,L Note 3 6 mA Optical Overshoot - 200 m HCS 30 % Transmitter Application Circuit Current Consumption - 200 m HCS ICC 130 Note 2, Fig 3 mA 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 powerlevels. The modulated (useful) power is the difference between the high and low level of light output power (transmitted) or inputpower (received), which can be measured with an average power meter as a function of duty cycle (see Figure 3). Average ModulatedPower 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, sometimesreferred to as "hold-on" current, is prebias supplied to the LED during the off state to facilitate fast switching speeds. 3 Plastic and Hard Clad Silica Optical Fiber Receiver Application Circuit:Performance[4] of the HFBR-25X6 receiver in the recommended application circuit (Figure 1); 1-125 MBd, 25 C unless otherwise stated. Parameter Symbol Typical Unit Condition Note Data Output Voltage - Low VOL VCC-1.7 V RL = 50 Note 5 Data Output Voltage - High VOH VCC-0.9 V RL = 50 Note 5 Receiver Sensitivity to Average Modulated Optical Power 1 mm POF Pmin -27.5 dBm 50% eye opening Note 2 Receiver Sensitivity to Average Modulated Optical Power 200 m HCS Pmin -28.5 dBm 50% eye opening Note 2 Receiver Overdrive Level of Average Modulated Optical Power 1 mm POF Pmax -7.5 dBm 50% eye opening Note 2 Receiver Overdrive Level of Average Modulated Optical Power 200 m HCS Pmax -10.5 dBm 50% eye opening Note 2 Receiver Application Circuit Current Consumption ICC 85 mA RL = Figure 1 Notes: 4. Performance in response to a signal from the HFBR-15X7 transmitter driven with the recommended circuit at 1-125 MBd over 1 meter of HFBR-R/ EXXYYY plastic optical fiber or 1 meter of HFBR-H/VXXYYY hard clad silica optical fiber. 5. Terminated through a 50 resistor to VCC -2 V. 6. If there is no input optical power to the receiver, electrical noise can result in false triggering of the receiver. In typical applications, data encoding and error detection prevent random triggering from being interpreted as valid data. Refer to Applications Note 1066 for design guidelines. L1 CB70-1812 C1 0.001 VCC C2 0.1 R5 22 14 9 10 U1C C3 0.1 C4 0.001 C5 10 + Q2 BFQ52 R6 91 9 8 7 6 5 4 3 2 J1 1 TX VEE Q2 BASE Q1 BASE TX VCC RX VCC NC PIN 19 10H116 PIN 18 10H116 RX VEE 1 2 12 13 U1D 3 U1A + 8 U2 5 HFBR-15X7 Q3 2N3904 74ACTQ00 R9* 74ACTQ00 R7 91 4 5 U1B 6 VCC VBB R10 15 C8* C19 0.1 R12 4.7 C10 0.1 R11* ALL CAPACITOR VALUES ARE IN MICRO FARADS, WITH 10% TOLERANCE (UNLESS OTHERWISE NOTED). C9 .47 3V R24 1K C17 0.1 R22 1K R18 51 C16 0.1 MC10H116FN 18 19 U4C 15 17 C15 0.1 R25 1K R23 1K VBB C18 0.1 R13 4.7 R16 51 MC10H116FN 4 10 7 3 U4A 5 R19 51 20 MC10H116FN 9 14 13 8 U4B 12 R17 51 2 ALL RESISTANCES ARE IN OHMS WITH 5% TOLERANCE (UNLESS OTHERWISE NOTED). VBB R14 1K 8 C12 0.1 R15 1K C11 0.1 1 2 3 4 U3 5 HFBR-25X6 3V VCC R20 12 R21 62 VBB + C14 10 U5 TL431 Figure 1. Transmitter and Receiver Application Circuit with +5 V ECL Inputs and Outputs. 4 1 2 3 4 R8* 11 74ACTQ00 C20 10 C7 0.001 8 7 74ACTQ00 Q1 BFQ52 C6 0.1 C13 0.1 THE VALUES OF R8, R9, R11, AND C8 ARE DIFFERENT FOR POF AND HCS DRIVE CIRCUITS. R8 R9 R11 C8 POF HCS TOLERANCE 300 82 1% 300 82 1% 1K 470 1% 43 pF 120 pF 1% 120 : 120 : +5 V ECL SERIAL DATA SOURCE 82 : 0.1 F 9 TX VEE 82 : 8 TD + 5V 7 TD - 4.7 H + 10 F 6 TX VCC 0.1 F 0.1 F 5 RX VCC 82 : 0.1 F 10 F 82 : + 4.7 H 4 FIBER-OPTIC TRANSCEIVER SHOWN IN FIGURE 1 3 RD +5 V ECL SERIAL DATA RECEIVER 2 RD 120 : 120 : 4.7 H 1 RX VEE Figure 2. Recommended Power Supply Filter and +5 V ECL Signal Terminations for the Transmitter and Receiver Application Circuit of Figure 1. 21 200 OPTICAL POWER BUDGET -dB AVERAGE POWER - W POF 150 100 AVERAGE MODULATED POWER 50 AVERAGE POWER, 50% DUTY CYCLE 0 0 20 40 60 80 DUTY CYCLE - % Figure 3. Average Modulated Power. 5 100 19 17 15 HCS 13 11 9 10 30 50 70 90 110 130 150 DATA RATE - MBd Figure 4. Typical Optical Power Budget vs. Data Rate. 125 Megabaud Versatile Link Transmitter HFBR-15X7 Series Description The HFBR-15X7 transmitters incorporate a 650 nanometer LED in a horizontal (HFBR-1527) or vertical (HFBR-1537) gray housing. The HFBR-15X7 transmitters are suitable for use with current peaking to decrease response time and can be used with HFBR-25X6 receivers in data links operating at signal rates from 1 to 125 megabaud over 1 mm diameter plastic optical fiber or 200 m diameter hard clad silica glass optical fiber. Refer to Application Note 1066 for details for recommended interface circuits. GROUND ANODE CATHODE GROUND GROUND 1 2 3 4 GROUND SEE NOTE 6 Absolute Maximum Ratings Parameter Symbol Min. Max. Unit Storage Temperature TS -40 85 C Operating Temperature TO -40 70 C 260 C Lead Soldering Temperature Cycle Time 10 s Transmitter High Level Forward Input Current IF,H 120 mA Transmitter Average Forward Input Current IF,AV 60 mA Reverse Input Voltage VR 3 V Reference Note 1 50% Duty Cycle 1 MHz CAUTION: The small junction sizes inherent to the design of this component increase the component's susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly of this component to prevent damage and/or degradation which may be induced by ESD. WARNING: WHEN VIEWED UNDER SOME CONDITIONS, THE OPTICAL PORT MAYEXPOSE THE EYE BEYOND THE MAXIMUM PERMISSIBLE EXPOSURE RECOMMENDEDIN ANSI Z136.2, 1993. UNDER MOST VIEWING CONDITIONS THERE IS NO EYE HAZARD. 6 Electrical/Optical Characteristics 0 to 70 C, unless otherwise stated. Parameter Symbol Min. Typ.[2] Max. Unit Condition Note Transmitter Output Optical Power, 1 mm POF PT -9.5 -10.4 -7.0 -4.8 -4.3 dBm IF,dc = 20 mA, 25 C 0-70 C Note 3 Transmitter Output Optical Power, 1 mm POF PT -6.0 -6.9 -3.0 -0.5 -0.0 dBm IF,dc = 60 mA, 25 C 0-70 C Note 3 Transmitter Output Optical Power, 200 m HCS PT -14.6 -15.5 -13.0 -10.5 -10.0 dBm IF,dc = 60 mA, 25 C 0-70 C Note 3 Output Optical Power Temperature Coefficient PT T -0.02 dB/C Peak Emission Wavelength PK Peak Wavelength Temperature Coefficient T 0.12 nm/C Spectral Width FWHM 21 nm Full Width, Half Maximum V IF = 60 mA 640 650 660 Forward Voltage VF 1.8 2.1 Forward Voltage Temperature Coefficient VF T -1.8 mV/C Transmitter Numerical Aperture NA 0.5 Thermal Resistance, Junction to Case jc 140 Reverse Input Breakdown Voltage VBR 13 V IF,dc = -10 A Diode Capacitance CO 60 pF VF = 0 V, f = 1 MHz Unpeaked Optical Rise Time, 10% - 90% tr 12 ns IF = 60 mA, f = 100 kHz Figure 1 Note 5 Unpeaked Optical Fall Time, 90% - 10% tf 9 ns IF = 60 mA, f = 100 kHz Figure 1 Note 5 3.0 2.4 nm C/W Note 4 Notes: 1. 1.6 mm below seating plane. 2. Typical data is at 25 C. 3. Optical Power measured at the end of 0.5 meter of 1 mm diameter plastic or 200 m diameter hard clad silica optical fiber with a large area detector. 4. Typical value measured from junction to PC board solder joint for horizontal mount package, HFBR-1527. jc is approximately 30C/W higher for vertical mount package, HFBR-1537. 5. Optical rise and fall times can be reduced with the appropriate driver circuit; refer to Application Note 1066. 6. Pins 5 and 8 are primarily for mounting and retaining purposes, but are electrically connected; pins 3 and 4 are electrically unconnected. It is recommended that pins 3, 4, 5, and 8 all be connected to ground to reduce coupling of electrical noise. 7. Refer to the Versatile Link Family Fiber Optic Cable and Connectors Technical Data Sheet for cable connector options for 1 mm plastic optical fiber and 200 m HCS fiber. 8. The LED current peaking necessary for high frequency circuit design contributes to electromagnetic interference (EMI). Care must be taken in circuit board layout to minimize emissions for compliance with governmental EMI emissions regulations. Refer to Application Note 1066 for design guidelines. 7 HP8082A PULSE GENERATOR BCP MODEL 300 500 MHz BANDWIDTH SILICON AVALANCHE PHOTODIODE HP54002A 50 OHM BNC INPUT POD 50 OHM LOAD RESISTOR HP54100A OSCILLOSCOPE NORMALIZED SPECTRAL OUTPUT POWER 1.2 0 C 1.0 25 C 0.8 70 C 0.6 0.4 0.2 0 620 630 640 650 660 670 680 WAVELENGTH (nm) Figure 5. Test Circuit for Measuring Unpeaked Rise and Fall Times. Figure 6. Typical Spectra Normalizedto the 25 C Peak. 0 PT - NORMALIZED OUTPUT POWER - dB VF - FORWARD VOLTAGE - V 2.4 0 C 2.2 25 C 70 C 2.0 1.8 0 C -10 -15 25 C 70 C -20 -25 1.6 1 10 100 IF,DC - TRANSMITTER DRIVE CURRENT (mA) Figure 7. Typical Forward Voltage vs. Drive Current. 8 -5 1 10 100 IF,DC - TRANSMITTER DRIVE CURRENT (mA) Figure 8. Typical Normalized Output Optical Power vs. Drive Current. 125 Megabaud Versatile Link Receiver HFBR-25X6 Series Description The HFBR-25X6 receivers contain a PIN photodiode and transimpedance pre-amplifier circuit in a horizontal (HFBR-2526) or vertical (HFBR-2536) blue housing, and are designed to interface to 1 mm diameter plastic optical fiber or 200 m hard clad silica glass optical fiber. The receivers convert a received optical signal to an analog output voltage. Follow-on circuitry can optimize link performance for a variety of distance and data rate requirements. Electrical bandwidth greater than 65 MHz allows design of high speed data links with plastic or hard clad silica optical fiber. Refer toApplication Note 1066 for details for recommended interface circuits. GROUND 4 3 2 1 VCC GROUND GROUND SIGNAL GROUND SEE NOTES 2, 4, 9 Absolute Maximum Ratings Parameter Symbol Min. Max. Unit Storage Temperature TS -40 +75 C Operating Temperature TO 0 +70 C 260 C Lead Soldering Temperature Cycle Time 10 s Signal Pin Voltage VO -0.5 VCC V Supply Voltage VCC -0.5 6.0 V Output Current IO 25 mA Reference Note 1 CAUTION: The small junction sizes inherent to the design of this component increase the component's susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly of this component to prevent damage and/or degradation which may be induced by ESD. 9 Electrical/Optical Characteristics 0 to 70 C; 5.25 V VCC 4.75 V; power supply must be filtered (see Figure 1, Note 2). Parameter Symbol Min. Typ. Max. Unit Test Condition Note AC Responsivity 1 mm POF RP,APF 1.7 3.9 6.5 mV/W 650 nm Note 4 AC Responsivity 200 m HCS RP,HCS 4.5 7.9 11.5 mV/W RMS Output Noise VNO 0.46 0.69 mVRMS Note 5 Equivalent Optical Noise Input Power, RMS - 1 mm POF PN,RMS - 39 -36 dBm Note 5 Equivalent Optical Noise Input Power, RMS - 200 m HCS PN,RMS -42 -40 dBm Note 5 Peak Input Optical Power - 1 mm POF PR -5.8 -6.4 dBm dBm 5 ns PWD 2 ns PWD Note 6 Peak Input Optical Power - 200 m HCS PR -8.8 -9.4 dBm dBm 5 ns PWD 2 ns PWD Note 6 Output Impedance ZO 50 MHz Note 4 DC Output Voltage VO PR = 0 W Supply Current ICC Electrical Bandwidth BWE Bandwidth * Rise Time 30 0.8 65 1.8 2.6 V 9 15 mA 125 MHz 0.41 Hz * s -3 dB electrical Electrical Rise Time, 10-90% tr 3.3 6.3 ns PR = -10 dBm peak Electrical Fall Time, 90-10% tf 3.3 6.3 ns PR = -10 dBm peak Pulse Width Distortion PWD 0.4 1.0 ns PR = -10 dBm peak Note 7 % PR = -10 dBm peak Note 8 Overshoot 4 Notes: 1. 1.6 mm below seating plane. 2. The signal output is an emitter follower, which does not reject noise in the power supply. The power supply must be filtered as in Figure 1. 3. Typical data are at 25 C and VCC = +5 Vdc. 4. Pin 1 should be AC coupled to a load 510 with load capacitance less than 5 pF. 5. Measured with a 3 pole Bessel filter with a 75 MHz, -3 dB bandwidth. 6. The maximum Peak Input Optical Power is the level at which the Pulse Width Distortion is guaranteed to be less than the PWD listed under Test Condition. PR,Max is given for PWD = 5 ns for designing links at 50 MBd operation, and also for PWD = 2 ns for designing links up to 125 MBd (for both POF and HCS input conditions). 7. 10 ns pulse width, 50% duty cycle, at the 50% amplitude point of the waveform. 8. Percent overshoot is defined at: (VPK - V100%) x 100% V100% 9. Pins 5 and 8 are primarily for mounting and retaining purposes, but are electrically connected. It is recommended that these pins be connected to ground to reduce coupling of electrical noise. 10. If there is no input optical power to the receiver (no transmitted signal) electrical noise can result in false triggering of the receiver. In typical applications, data encoding and error detection prevent random triggering from being interpreted as valid data. Refer to Application Note 1066 for design guidelines. 10 Figure 9. Recommended Power Supply Filter Circuit. Figure 10. Simplified Receiver Schematic. Figure 11. Typical Pulse Width Distortion vs. Peak Input Power. Figure 13. Typical Rise and Fall Time vs. Temperature. 11 Figure 12. Typical Output Spectral Noise Density vs. Frequency. Versatile Link Mechanical Dimensions Versatile Link Printed Circuit Board Layout Dimensions For product information and a complete list of distributors, please go to our web site: www.avagotech.com Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries. Data subject to change. Copyright (c) 2005-2012 Avago Technologies. All rights reserved. Obsoletes 5965-6114E AV02-3589EN - June 11, 2012