Agilent HFBR-0400, HFBR-14xx and HFBR-24xx Series Low Cost, Miniature Fiber Optic Components with ST®, SMA, SC and FC Ports Data Sheet Description The HFBR-0400 Series of components is designed to provide cost effective, high performance fiber optic communication links for information systems and industrial applications with link distances of up to 2.7 kilometers. With the HFBR-24x6, the 125 MHz analog receiver, data rates of up to 160 megabaud are attainable. Transmitters and receivers are directly compatible with popular “industry-standard” connectors: ST®, SMA, SC and FC. They are completely specified with multiple fiber sizes; including 50/125 µm, 62.5/125 µm, 100/ 140 µm, and 200 µm. The HFBR-14x4 high power transmitter and HFBR-24x6 125 MHz receiver pair up to provide a duplex solution optimized for 100 Base-SX. 100Base-SX is a Fast Ethernet Standard (100 Mbps) at 850 nm on multimode fiber. 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 • Computer Monitor Links • Digital Cross Connect Links • Central Office Switch/PBX Links • Video Links • Modems and Multiplexers • Suitable for Tempest Systems • Industrial Control Links Complete evaluation kits are available for ST product offerings; including transmitter, receiver, connectored cable, and technical literature. In addition, ST connectored cables are available for evaluation. ST® is a registered trademark of AT&T. HCS® is a registered trademark of the SpecTran Corporation. Features • Meets IEEE 802.3 Ethernet and 802.5 Token Ring Standards • Meets TIA/EIA-785 100Base-SX standard • Low Cost Transmitters and Receivers • Choice of ST®, SMA, SC or FC Ports • 820 nm Wavelength Technology • Signal Rates up to 160 MBd • Link Distances up to 2.7 km • Specified with 50/125 µm, 62.5/ 125 µm, 100/140 µm, and 200 µm HCS® Fiber • Repeatable ST Connections within 0.2 dB Typical • Unique Optical Port Design for Efficient Coupling • Auto-Insertable and Wave Solderable • No Board Mounting Hardware Required • Wide Operating Temperature Range -40 °C to +85 °C • AlGaAs Emitters 100% Burn-In Ensures High Reliability • Conductive Port Option HFBR-0400 Series Part Number Guide 1 Transmitter 2 Receiver 4 HFBR-x4xxaa 820 nm Transmitter and Receiver products 0 SMA, housed 1 ST, housed 2 FC, housed E SC, housed T Threaded port option C Conductive port receiver option M Metal port option 2 TX, stadnard power 4 TX, high power 2 RX, 5 MBd, TTL output 5 TX, high light output power 6 RX, 125 MHz, Analog Output Available Options HFBR-1402 HFBR-1414 HFBR-1412TM HFBR-2412TC HFBR-2412T HFBR-1404 HFBR-1414M HFBR-14E4 HFBR-2416 HFBR-2422 HFBR-1412 HFBR-1414T HFBR-2402 HFBR-2416M HFBR-24E6 HFBR-1412T HFBR-1424 HFBR-2406 HFBR-2412 HFBR-2416T HFBR-2416TC Link Selection Guide Data rate (MBd) Distance (m) Transmitter Receiver Fiber Size (µm) Evaluation Kit 5 1500 HFBR-14x2 HFBR-24x2 200 HCS N/A 5 2000 HFBR-14x4 HFBR-24x2 62.5/125 HFBR-0410 20 2700 HFBR-14x4 HFBR-24x6 62.5/125 HFBR-0414 32 2200 HFBR-14x4 HFBR-24x6 62.5/125 HFBR-0414 55 1400 HFBR-14x4 HFBR-24x6 62.5/125 HFBR-0414 125 700 HFBR-14x4 HFBR-24x6 62.5/125 HFBR-0416 155 600 HFBR-14x4 HFBR-24x6 62.5/125 HFBR-0416 160 500 HFBR-14x4 HFBR-24x6 62.5/125 HFBR-0416 For additional information on specific links see the following individual link descriptions. Distances measured over temperature range from 0 to +70 °C. 2 Applications Support Guide This section gives the designer information necessary to use the HFBR-0400 series components to make a functional fiber optic transceiver. Agilent offers a wide selection of evaluation kits for hands-on experience with fiber optic products as well as a wide range of application notes complete with circuit diagrams and board layouts. Furthermore, Agilent’s application support group is always ready to assist with any design consideration. Application Literature Title Description HFBR-0400 Series Reliability Data Transmitter & Receiver Reliability Data Application Bulletin 78 Low Cost Fiber Optic Links for Digital Applications up to 155 MBd Application Note 1038 Complete Fiber Solutions for IEEE 802.3 FOIRL, 10Base-FB and 10Base-FL Application Note 1065 Complete Solutions for IEEE 802.5J Fiberoptic Token Ring Application Note 1073 HFBR-0219 Test Fixture for 1x9 Fiber Optic Transceivers Application Note 1086 Optical Fiber Interconnections in Telecommunication Products Application Note 1121 DC to 32 MBd Fiberoptic Solutions Application Note 1122 2 to 70 MBd Fiberoptic Solutions Application Note 1123 20 to 160 MBd Fiberoptic Solutions Application Note 1137 Generic Printed Circuit Layout Rules Application Note 1383 Cost Effective Fiber and Media Conversion for 100Base-SX 3 HFBR-0400 Series Evaluation Kits Package and Handling Information HFBR-0410 ST Evaluation Kit Contains the following: Package Information All HFBR-0400 Series transmitters and receivers are housed in a low-cost, dual-inline package that is made of high strength, heat resistant, chemically resistant, and UL 94V-O flame retardant ULTEM® plastic (UL File #E121562). The transmitters are easily identified by the light grey color connector port. The receivers are easily identified by the dark grey color connector port. (Black color for conductive port). The package is designed for auto-insertion and wave soldering so it is ideal for high volume production applications. • One HFBR-1412 transmitter • One HFBR-2412 five megabaud TTL receiver • Three meters of ST • connectored 62.5/125 µm fiber optic cable with low cost plastic ferrules. Related literature HFBR-0414 ST Evaluation Kit Includes additional components to interface to the transmitter and receiver as well as the PCB to reduce design time. Contains the following: • One HFBR-1414T transmitter • One HFBR-2416T receiver • Three meters of ST • • • • • • connectored 62.5/125 µm fiber optic cable Printed circuit board ML-4622 CP Data Quantizer 74ACTllOOON LED Driver LT1016CN8 Comparator 4.7 µH Inductor Related literature HFBR-0400 SMA Evaluation Kit Contains the following: • One HFBR-1402 transmitter • One HFBR-2402 five megabaud TTL receiver • Two meters of SMA • Handling and Design Information Each part comes with a protective port cap or plug covering the optics. These caps/ plugs will vary by port style. When soldering, it is advisable to leave the protective cap on the unit to keep the optics clean. Good system performance requires clean port optics and cable ferrules to avoid obstructing the optical path. Clean compressed air often is sufficient to remove particles of dirt; methanol on a cotton swab also works well. connectored 1000 µm plastic optical fiber Related literature HFBR-0416 Evaluation Kit Contains the following: • One fully assembled 1x9 • transceiver board for 155 MBd evaluation including: - HFBR-1414 transmitter - HFBR-2416 receiver - circuitry Related literature Ultem® is a registered Trademark of the GE corporation. 4 Recommended Chemicals for Cleaning/Degreasing HFBR-0400 Products Alcohols: methyl, isopropyl, isobutyl. Aliphatics: hexane, heptane, Other: soap solution, naphtha. Do not use partially halogenated hydrocarbons such as 1,1.1 trichloroethane, ketones such as MEK, acetone, chloroform, ethyl acetate, methylene dichloride, phenol, methylene chloride, or N-methylpyrolldone. Also, Agilent does not recommend the use of cleaners that use halogenated hydrocarbons because of their potential environmental harm. Mechanical Dimensions SMA Port HFBR-x40x 12.7 (0.50) Rx/Tx COUNTRY OF ORIGIN A YYWW HFBR-X40X 1/4 - 36 UNS 2A THREAD 22.2 (0.87) 6.35 (0.25) 12.7 (0.50) 6.4 (0.25) DIA. 3.81 (0.15) 10.2 (0.40) 5 2.54 (0.10) 1 PINS 2,3,6,7 0.46 DIA. (0.018) 8 2 7 6 4 5.1 (0.20) 1.27 (0.05) 2.54 (0.10) 3 PINS 1,4,5,8 0.51 X 0.38 (0.020 X 0.015) 3.6 (0.14) PIN NO. 1 INDICATOR Mechanical Dimensions ST Port 12.7 (0.50) Rx/Tx COUNTRY OF ORIGIN A YYWW HFBR-X41X HFBR-x41x 8.2 (0.32) 27.2 (1.07) 6.35 (0.25) 12.7 (0.50) 7.0 DIA. (0.28) 3.81 (0.15) 5 6 4 8 1 PINS 2,3,6,7 0.46 DIA. (0.018) PIN NO. 1 INDICATOR 5 5.1 (0.20) 1.27 (0.05) 2.54 (0.10) 2 7 3 PINS 1,4,5,8 0.51 X 0.38 (0.020 X 0.015) 2.54 (0.10) 3.6 (0.14) 10.2 (0.40) Mechanical Dimensions Threaded ST Port HFBR-x41xT Rx/Tx COUNTRY OF ORIGIN A YYWW HFBR-X41XT 5.1 (0.20) 12.7 (0.50) 8.4 (0.33) 27.2 (1.07) 7.6 (0.30) 6.35 (0.25) 12.7 (0.50) 7.1 DIA. (0.28) 3.6 (0.14) 5.1 (0.20) 3/8 - 32 UNEF - 2A 3.81 (0.15) 1.27 (0.05) 2.54 DIA. (0.10) 6 5 2.54 (0.10) 1 PINS 2,3,6,7 0.46 DIA. (0.018) 8 2 7 3 4 PINS 1,4,5,8 0.51 X 0.38 (0.020 X 0.015) PIN NO. 1 INDICATOR Mechanical Dimensions FC Port HFBR-x42x 12.7 (0.50) Rx/Tx COUNTRY OF ORIGIN A YYWW HFBR-X42X M8 x 0.75 6G THREAD (METRIC) 19.6 (0.77) 12.7 (0.50) 7.9 (0.31) 3.81 (0.15) 2.5 (0.10) 6 5 6 8 1 2 7 3 4 2.5 (0.10) PIN NO. 1 INDICATOR 3.6 (0.14) 5.1 (0.20) 10.2 (0.40) 10.2 (0.40) Mechanical Dimensions SC Port Rx/Tx COUNTRY OF ORIGIN A YYWW HFBR-X4EX HFBR-x4Ex 28.65 (1.128) 6.35 (0.25) 12.7 (0.50) 10.0 (0.394) 5.1 (0.200) 15.95 (0.628) 3.81 (0.15) 1.27 (0.050) 2.54 (0.10) 2.54 (0.100) 12.7 (0.500) 7 10.38 (0.409) 3.60 (0.140) LED OR DETECTOR IC LENS–SPHERE (ON TRANSMITTERS ONLY) HOUSING LENS–WINDOW CONNECTOR PORT HEADER EPOXY BACKFILL PORT GROUNDING PATH INSERT Figure 1. HFBR-0400 ST Series Cross-Sectional View. Panel Mount Hardware HFBR-4401: for SMA Ports HFBR-4411: for ST Ports 1/4 - 36 UNEF 2B THREAD PART NUMBER 3/8 - 32 UNEF 2B THREAD 0.2 IN. 7.87 DIA. (0.310) HEX-NUT 12.70 DIA. (0.50) 1.65 (0.065) HEX-NUT 14.27 TYP. (0.563) DIA. 10.41 MAX. (0.410) DIA. 0.14 (0.005) WASHER WASHER (Each HFBR-4401 and HFBR-4411 kit consists of 100 nuts and 100 washers). Port Cap Hardware HFBR-4402: 500 SMA Port Caps HFBR-4120: 500 ST Port Plugs (120 psi) 8 1.65 (0.065) 3/8 - 32 UNEF 2A THREADING 1 THREAD AVAILABLE 7.87 TYP. (0.310) DIA. 6.61 DIA. (0.260) Rx/Tx COUNTRY OF ORIGIN A YYWW HFBR-X40X DATE CODE 0.46 (0.018) WALL WASHER NUT Options In addition to the various port styles available for the HFBR0400 series products, there are also several extra options that can be ordered. To order an option, simply place the corresponding option number at the end of the part number. See page 2 for available options. Option T (Threaded Port Option) • Allows ST style port • • • • components to be panel mounted. Compatible with all current makes of ST® multimode connectors Mechanical dimensions are compliant with MIL-STD83522/13 Maximum wall thickness when using nuts and washers from the HFBR-4411 hardware kit is 2.8 mm (0.11 inch) Available on all ST ports Option C (Conductive Port Receiver Option) • Designed to withstand electrostatic discharge (ESD) of 25 kV to the port • Significantly reduces effect of electromagnetic interference (EMI) on receiver sensitivity • Allows designer to separate the signal and conductive port grounds • Recommended for use in noisy environments • Available on SMA and threaded ST port style receivers only 9 Option M (Metal Port Option) • Nickel plated aluminum connector receptacle • Designed to withstand electrostatic discharge (ESD) of 15 kV to the port • Significantly reduces effect of electromagnetic interference (EMI) on receiver sensitivity • Allows designer to separate the signal and metal port grounds • Recommended for use in very noisy environments • Available on SMA, ST, and threaded ST ports Typical Link Data HFBR-0400 Series Description The following technical data is taken from 4 popular links using the HFBR-0400 series: the 5 MBd link, Ethernet 20 MBd link, Token Ring 32 MBd link, and the corresponds to transceiver solutions combining the HFBR0400 series components and various recommended transceiver design circuits using off-the-shelf electrical components. This data is meant to be regarded as an example of typical link performance for a given design and does not call out any link limitations. Please refer to the appropriate application note given for each link to obtain more information. 5 MBd Link (HFBR-14xx/24x2) Link Performance -40 °C to +85 °C unless otherwise specified Parameter Symbol Min. Typ. Optical Power Budget with 50/125 µm fiber OPB50 4.2 Optical Power Budget with 62.5/125 µm fiber OPB62.5 Optical Power Budget with 100/140 µm fiber Optical Power Budget with 200 µm fiber Max. Units Conditions Reference 9.6 dB HFBR-14x4/24x2 NA = 0.2 Note 1 8.0 15 dB HFBR-14x4/24x2 NA = 0.27 Note 1 OPB100 8.0 15 dB HFBR-14x2/24x2 NA = 0.30 Note 1 OPB200 12 20 dB HFBR-14x2/24x2 NA = 0.37 Note 1 Date Rate Synchronous dc 5 MBd Note 2 Asynchronous dc 2.5 MBd Note 3, Fig 7 Propagation Delay LOW to HIGH tPLH 72 ns Propagation Delay HIGH to LOW tPHL 46 ns System Pulse Width Distortion tPLH - tPHL 26 ns Bit Error Rate BER 10-9 TA = +25 °C PR = -21 dBm peak Figs 6, 7, 8 Fiber cable length = 1 m Data rate <5 Bd PR > -24 dBm peak Notes: 1. OPB at TA = -40 to +85 °C, V CC = 5.0 V dc, IF ON = 60 mA. PR = -24 dBm peak. 2. Synchronous data rate limit is based on these assumptions: a) 50% duty factor modulation, e.g., Manchester I or BiPhase Manchester II; b) continuous data; c) PLL Phase Lock Loop demodulation; d) TTL threshold. 3. Asynchronous data rate limit is based on these assumptions: a) NRZ data; b) arbitrary timing-no duty factor restriction; c) TTL threshold. 10 5 MBd Logic Link Design If resistor R1 in Figure 2 is 70.4 W, a forward current IF of 48 mA is applied to the HFBR-14x4 LED transmitter. With IF = 48 mA the HFBR-14x4/24x2 logic link is guaranteed to work with 62.5/125 µm fiber optic cable over the entire range of 0 to 1750 meters at a data rate of dc to 5 MBd, with arbitrary data format and pulse width distortion typically less than 25%. By setting R1 = 115 W, the transmitter can be driven with IF = 30 mA, if it is desired to economize on power or achieve lower pulse distortion. The following example will illustrate the technique for selecting the appropriate value of IF and R1. Maximum distance required = 400 meters. From Figure 3 the drive current should be 15 mA. From the transmitter data VF = 1.5 V (max.) at IF = 15 mA as shown in Figure 9. R1 = VCC − VF = 5V − 1.5V IF 15 mA R1 = 233 Ω The curves in Figures 3, 4, and 5 are constructed assuming no inline splice or any additional system loss. Should the link consists of any in-line splices, these curves can still be used to calculate link limits provided they are shifted by the additional system loss expressed in dB. For example, Figure 3 indicates that with 48 mA of transmitter drive current, a 1.75 km link distance is achievable with 62.5/125 µm fiber which has a maximum attenuation of 4 dB/km. With 2 dB of additional system loss, a 1.25 km link distance is still achievable. TTL DATA OUT +5 V SELECT R1 TO SET IF IF R 1 1 KΩ HFBR-14xx TRANSMITTER 2 6 7 3 HFBR-24x2 RECEIVER 2 T R 6 7&3 DATA IN ½ 75451 TRANSMISSION DISTANCE = NOTE: IT IS ESSENTIAL THAT A BYPASS CAPACITOR (0.01 µF TO 0.1 µF CERAMIC) BE CONNECTED FROM PIN 2 TO PIN 7 OF THE RECEIVER. TOTAL LEAD LENGTH BETWEEN BOTH ENDS OF THE CAPACITOR AND THE PINS SHOULD NOT EXCEED 20 MM. Figure 2. Typical Circuit Configuration. 11 RL VCC 0.1 µF 30 -4 TYPICAL +25 ˚C UNDERDRIVE -5 20 -6 -7 -8 10 -10 -11 dB/km 4 1.5 2.8 CABLE ATTENUATION MAX (-40 ˚C, +85 ˚C) MIN (-40 ˚C, +85 ˚C) TYP (+25 ˚C) -9 0 2 6 4 LINK LENGTH (km) t PLH (TYP) @ 25˚C TYPICAL +25 ˚C UNDERDRIVE -5 20 -6 -7 -8 10 dB/km 5.5 1.0 3.3 CABLE ATTENUATION MAX (-40 ˚C, +85 ˚C) MIN (-40 ˚C, +85 ˚C) TYP (+25 ˚C) -9 1 0 2 3 6 4 50 t PHL (TYP) @ 25˚C 35 30 -2 50 TYPICAL 26˚C UNDERDRIVE -3 40 30 -4 CABLE ATTENUATION α MAX (-40˚C, +85˚C) α MIN (-40˚C, +85˚C) α TYP (-40˚C, +85˚C) -5 dB/km 4 1 2.8 -6 0 0.4 0.8 1.2 1.6 2 20 LINK LENGTH (km) LINK LENGTH (km) Figure 5. HFBR-14x4/HFBR-24x2 Link Design Limits with 50/125 µm Cable. 45 40 35 30 25 25 20 -22 -21 -20 -19 -18 -17 -16 -15 -14 -13 -12 20 -22 -21 -20 -19 -18 -17 -16 -15 -14 -13 -12 P R – RECEIVER POWER – dBm P R – RECEIVER POWER – dBm Figure 6. Propagation Delay through System with One Meter of Cable. PULSE GEN +15 V ½ 75451 RS 1N4150 2, 6, 7 Figure 7. Typical Distortion of Pseudo Random Data at 5 Mb/s. RESISTOR VALUE AS NEEDED FOR SETTING OPTICAL POWER OUTPUT FROM RECEIVER END OF TEST CABLE INPUT IF 3 IF 10 W 100 ns PULSE REPETITION FREQ = 1 MHz tPHLT tPHLT TRANSMITTER INPUT (IF) PT - FROM 1-METER TEST CABLE +5 V 2 RL 560 6 0.1 µF 7&3 OUTPUT + VO 15 pF 100 ns 50% 10 W PT 50% TIMING ANALYSIS EQUIPMENT eg. SCOPE HFBR-2412 RECEIVER Figure 8. System Propagation Delay Test Circuit and Waveform Timing Definitions. 12 WORST CASE -40˚C, +85˚C UNDERDRIVE 50 tD – NRZ DISTORTION – ns t PLH OR t PHL PROPOGATION DELAY –ns 30 -4 -1 55 55 40 40 Figure 4. HFBR-14x2/HFBR-24x2 Link Design Limits with 100/140 µm Cable. 60 45 WORST CASE -40 ˚C, +85 ˚C UNDERDRIVE -3 -11 75 65 OVERDRIVE -10 Figure 3. HFBR-1414/HFBR-2412 Link Design Limits with 62.5/125 µm Cable. 70 -2 60 I F – TRANSMITTER FORWARD CURRENT – (mA) -3 -1 60 50 10 LOG (t/to) NORMALIZED TRANSMITTER CURRENT (dB) 40 0 0 IF TRANSMITTER FORWARD CURRENT (mA) WORST CASE -40 ˚C, +85 ˚C UNDERDRIVE OVERDRIVE -2 10LOG(I/Io) NORMALIZED TRANSMITTER CURRENT (dB) -1 60 50 IF TRANSMITTER FORWARD CURRENT (mA) 10LOG(I/Io) NORMALIZED TRANSMITTER CURRENT (dB) 0 tPHL MAX VO 5V 1.5 V 0 tPHL MIN tPHL MAX tPHL MIN Ethernet 20 MBd Link (HFBR-14x4/24x6) (refer to Application Note 1038 for details) Typical Link Performance Parameter Symbol Typ [1, 2] Units Conditions Receiver Sensitivity -34.4 dBm average 20 MBd D2D2 hexadecimal data 2 km 62.5/125 µm fiber Link Jitter 7.56 7.03 ns pk-pk ns pk-pk ECL Out Receiver TTL Out Receiver Transmitter Jitter 0.763 ns pk-pk 20 MBd D2D2 hexadecimal data Optical Power PT -15.2 dBm average 20 MBd D2D2 hexadecimal data Peak IF,ON = 60 mA LED Rise Time tr 1.30 ns 1 MHz square wave input LED Fall Time tf 3.08 ns Mean Difference |tr - tf| 1.77 ns Bit Error Rate BER 10 -10 Output Eye Opening 36.7 ns Data Format 50% Duty Factor 20 MBd At AUI receiver output Notes: 1. Typical data at TA = +25 °C, VCC = 5.0 V dc. 2. Typical performance of circuits shown in Figure 1 and Figure 3 of AN-1038 (see applications support section). Token Ring 32 MBd Link (HFBR-14x4/24x6) (refer to Application Note 1065 for details) Typical Link Performance Parameter Symbol Typ [1, 2] Units Conditions Receiver Sensitivity -34.1 dBm average 32 MBd D2D2 hexadecimal data 2 km 62.5/125 µm fiber Link Jitter 6.91 5.52 ns pk-pk ns pk-pk ECL Out Receiver TTL Out Receiver Transmitter Jitter 0.823 ns pk-pk 32 MBd D2D2 hexadecimal data dBm peak Transmitter TTL in IF ON = 60 mA, IF OFF = 1 mA 1 MHz square wave input Optical Power Logic Level "0" PT ON -12.2 Optical Power Logic Level "1" PT OFF -82.2 LED Rise Time tr 1.3 ns LED Fall Time tf 3.08 ns Mean Difference |tr - tf| 1.77 ns Bit Error Rate BER 10-10 Data Format 50% Duty Factor 32 MBd Notes: 1. Typical data at TA = +25 °C, V CC = 5.0 V dc. 2. Typical performance of circuits shown in Figure 1 and Figure 3 of AN-1065 (see applications support section) 13 155 MBd Link (HFBR-14x4/24x6) (refer to Application Bulletin 78 for details) Typical Link Performance Parameter Symbol Min Typ [1, 2] Optical Power Budget with 50/125 µm fiber OPB50 7.9 Optical Power Budget with 62.5/125 µm fiber OPB62 Optical Power Budget with 100/140 µm fiber Optical Power Budget with 200 µm HCS fiber Units Conditions Ref 13.9 dB NA = 0.2 Note 2 11.7 17.7 dB NA = 0.27 OPB100 11.7 17.7 dB NA = 0.30 OPB200 16.0 22.0 dB NA = 0.35 Data Format 20% to 80% Duty Factor 1 Max 175 System Pulse Width Distortion |tPLH - tPHL| 1 Bit Error Rate BER 10-9 MBd ns PR = -7 dBm peak 1 m 62.5/125 µm fiber Data rate < 100 MBaud PR > -31 dBm peak Note 2 Notes: 1. Typical data at T A = +25 °C, V CC = 5.0 V dc, PECL serial interface. 2. Typical OPB was determined at a probability of error (BER) of 10-9. Lower probabilities of error can be achieved with short fibers that have less optical loss. 14 HFBR-14x2/14x4 Low-Cost HighSpeed Transmitters Description The HFBR-14xx fiber optic transmitter contains an 820 nm AlGaAs emitter capable of efficiently launching optical power into four different optical fiber sizes: 50/125 µm, 62.5/125 µm, 100/140 µm, and 200 µm HCS®. This allows the designer flexibility in choosing the fiber size. The HFBR-14xx is designed to operate with the Agilent HFBR-24xx fiber optic receivers. The HFBR-14xx transmitter’s high coupling efficiency allows the emitter to be driven at low current levels resulting in low power consumption and increased reliability of the transmitter. The HFBR-14x4 high power transmitter is optimized for small size fiber and typically can launch -15.8 dBm optical power at 60 mA into 50/125 µm fiber and -12 dBm into 62.5/125 µm fiber. The HFBR-14x2 standard transmitter typically can launch -12 dBm of optical power at 60 mA into 100/140 µm fiber cable. It is ideal for large size fiber such as 100/140 µm. The high launched optical power level is useful for systems where star couplers, taps, or inline connectors create large fixed losses. Consistent coupling efficiency is assured by the double-lens optical system (Figure 1). Power coupled into any of the three fiber types varies less than 5 dB from part to part at a given drive current and temperature. Consistent coupling efficiency reduces receiver dynamic range requirements which allows for longer link lengths. Housed Product ANODE CATHODE PIN 11 2 32 41 51 6 72 81 2, 6, 7 3 4 3 2 1 5 6 7 8 BOTTOM VIEW FUNCTION NC ANODE CATHODE NC NC ANODE ANODE NC NOTES: 1. PINS 1, 4, 5 AND 8 ARE ELECTICALLY CONNECTED. PIN 1 INDICATOR 2. PINS 2, 6 AND 7 ARE ELECTRICALLY CONNECTED TO THE HEADER. Unhoused Product 1 4 2 3 PIN 1 2 3 4 FUNCTION ANODE CATHODE ANODE ANODE BOTTOM VIEW Absolute Maximum Ratings Parameter Symbol Min Max Units Storage Temperature TS -55 +85 °C Operating Temperature TA -40 +85 °C +260 10 °C sec Lead Soldering Cycle Temp Time Forward Input Current Peak dc IFPK IFdc 200 100 mA V Reverse Input Voltage VBR 1.8 V 15 Reference Note 1 Electrical/Optical Specifications -40 °C to +85 °C unless otherwise specified. Parameter Symbol Min Typ2 Max Units Conditions Reference Forward Voltage VF 1.48 1.70 1.84 2.09 V IF = 60 mA dc IF = 100 mA dc Figure 9 Forward Voltage Temperature Coefficient DVF/DT -0.22 -0.18 mV/°C IF = 60 mA dc IF = 100 mA dc Figure 9 Reverse Input Voltage VBR 1.8 3.8 V IF = 100 µA dc Peak Emission Wavelength lP 792 820 Diode Capacitance CT 55 pF V = 0, f = 1 MHz Optical Power Temperature Coefficient DPT/DT -0.006 -0.010 dB/°C I = 60 mA dc I = 100 mA dc Thermal Resistance qJA 260 °C/W Notes 3, 8 14x2 Numerical Aperture NA 0.49 14x4 Numerical Aperture NA 0.31 14x2 Optical Port Diameter D 290 µm Note 4 14x4 Optical Port Diameter D 150 µm Note 4 865 nm HFBR-14x2 Output Power Measured Out of 1 Meter of Cable Parameter Symbol Min Typ2 Max Units Conditions Reference 50/125 µm Fiber Cable NA = 0.2 PT50 -21.8 -22.8 -20.3 -21.9 -18.8 -16.8 -15.8 -14.4 -13.8 dBm peak TA = +25 °C, IF = 60mA dc Notes 5, 6, 9 -19.0 -20.0 -17.5 -19.1 -16.0 -14.0 -13.0 -11.6 -11.0 dBm peak -15.0 16.0 -13.5 -15.1 -12.0 -10.0 -9.0 -7.6 -7.0 dBm peak -10.7 -11.7 -9.2 -10.8 -7.1 -4.7 -3.7 -2.3 -1.7 dBm peak 62.5/125 µm Fiber Cable NA = 0.275 100/140 µm Fiber Cable NA = 0.3 200 µm HCS Fiber Cable NA - 0.37 PT62 PT100 PT200 -16.8 -14.0 -10.0 -5.2 TA = +25 °C, IF = 100 mA dc TA = +25 °C, IF = 60mA dc TA = +25 °C, IF = 100 mA dc TA = +25 °C, IF = 60mA dc TA = +25 °C, IF = 100 mA dc TA = +25 °C, IF = 60mA dc TA = +25 °C, IF = 100 mA dc CAUTION: The small junction sizes inherent to the design of these components increase the components’ susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly of these components to prevent damage and/or degradation which may be induced by ESD. 16 HFBR-14x4 Output Power Measured out of 1 Meter of Cable Parameter Symbol Min Typ2 Max Units Conditions Reference 50/125 µm Fiber Cable NA = 0.2 PT50 -18.8 -19.8 -17.3 -18.9 -15.8 -13.8 -12.8 -11.4 -10.8 dBm peak TA = +25 °C, IF = 60mA dc Notes 5, 6, 9 -15.0 -16.0 -13.5 -15.1 -12.0 -10.0 -9.0 -7.6 -7.0 dBm peak -9.5 -10.5 -8.0 -9.6 -6.5 -4.5 -3.5 -2.1 -1.5 dBm peak -5.2 -6.2 -3.7 -5.3 -3.7 +0.8 +1.8 +3.2 +3.8 dBm peak 62.5/125 µm Fiber Cable NA = 0.275 100/140 µm Fiber Cable NA = 0.3 200 µm HCS Fiber Cable NA - 0.37 PT62 PT100 PT200 -13.8 -10.0 -4.5 -1.7 TA = +25 °C, IF = 100 mA dc TA = +25 °C, IF = 60mA dc TA = +25 °C, IF = 100 mA dc TA = +25 °C, IF = 60mA dc TA = +25 °C, IF = 100 mA dc TA = +25 °C, IF = 60mA dc TA = +25 °C, IF = 100 mA dc HFBR-14x5 Output Power Measured out of 1 Meter of Cable Parameter Symbol Min Typ2 Max Units Conditions 62.5/125 µm Fiber Cable NA = 0.275 PT62 -11.0 -12.0 -10.0 -10.0 -8.0 -7.0 dBm peak TA = +25 °C, IF = 60mA Reference 14x2/14x4 Dynamic Characteristics Typ2 Max Units Conditions Reference tr, tf 4.0 6.5 nsec No prebias IF = 60 mA Figure 12 Note 7 Rise Time, Fall Time (10% to 90%) tr, tf 3.0 nsec IF = 10 to 100 mA Note 7, Figure 11 Pulse Width Distortion PWD 0.5 nsec Parameter Symbol Rise Time, Fall Time (10% to 90%) Min Figure 11 Notes: 1. For I FPK > 100 mA, the time duration should not exceed 2 ns. 2. Typical data at TA = +25 °C. 3. Thermal resistance is measured with the transmitter coupled to a connector assembly and mounted on a printed circuit board. 4. D is measured at the plane of the fiber face and defines a diameter where the optical power density is within 10 dB of the maximum. 5. PT is measured with a large area detector at the end of 1 meter of mode stripped cable, with an ST® precision ceramic ferrule (MILSTD- 83522/13) for HFBR-1412/1414, and with an SMA 905 precision ceramic ferrule for HFBR-1402/1404. 6. When changing mW to dBm, the optical power is referenced to 1 mW (1000 mW). Optical Power P (dBm) = 10 log P (mW)/1000 mW. 7. Pre-bias is recommended if signal rate >10 MBd, see recommended drive circuit in Figure 11. 8. Pins 2, 6 and 7 are welded to the anode header connection to minimize the thermal resistance from junction to ambient. To further reduce the thermal resistance, the anode trace should be made as large as is consistent with good RF circuit design. 9. Fiber NA is measured at the end of 2 meters of mode stripped fiber, using the far-field pattern. NA is defined as the sine of the half angle, determined at 5% of the peak intensity point. When using other manufacturer’s fiber cable, results will vary due to differing NA values and specification methods. All HFBR-14XX LED transmitters are classified as IEC 825-1 Accessible Emission Limit (AEL) Class 1 based upon the current proposed draft scheduled to go in to effect on January 1, 1997. AEL Class 1 LED devices are considered eye safe. Contact your Agilent sales representative for more information. CAUTION: The small junction sizes inherent to the design of these components increase the components’ susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly of these components to prevent damage and/or degradation which may be induced by ESD. 17 Recommended Drive Circuits The circuit used to supply current to the LED transmitter can significantly influence the optical switching characteristics of the LED. The optical rise/fall times and propagation delays can be improved by using the appropriate circuit techniques. The LED drive circuit shown in RY Figure 11 uses frequency compensation to reduce the typical rise/fall times of the LED and a small pre-bias voltage to minimize propagation delay differences that cause pulsewidth distortion. The circuit will typically produce rise/fall times of 3 ns, and a total jitter including pulse-width distortion of less than 1 ns. This circuit is recommended for applications requiring low edge jitter or high- (VCC − VF) + 3.97(VCC − VF − 1.6V) IF ON (A) RX1 = 1 RY 2 3.97 REQ2 ( Ω ) = RX1 − 1 RX2 = RX3 = RX4 = 3(REQ2) speed data transmission at signal rates of up to 155 MBd. Component values for this circuit can be calculated for different LED drive currents using the equations shown below. For additional details about LED drive circuits, the reader is encouraged to read Agilent Application Bulletin 78 and Application Note 1038. RY = (5 − 1.84) + 3.97(5 − 1.84 − 1.6) 0.100 RY = 3.16 + 6.19 = 93.5 Ω 0.100 1 93.5 RX1 = = 11.8 Ω 2 3.97 REQ2 = 11.8 - 1 = 10.8 Ω 2000 ps C(pF) = RX1( Ω) RX2 = RX3 = RX4 = 3 (10.8) = 32.4 Ω Example for IF ON = 100mA : VF can be obtained from Figure 9 ( = 1.84 V). C= 18 2000 ps = 169 pF 11.8 Ω 2.0 +85 °C 80 +25 °C 60 -40 °C 40 20 10 1.2 3.0 1.8 1.6 2.0 1.4 1.2 1.4 1.0 0.8 1.0 0 0.8 -1.0 0.6 -2.0 -3.0 -4.0 -5.0 -7.0 0.4 0.2 0 0 10 20 30 40 50 60 70 80 90 100 IF – FORWARD CURRENT – mA 1.4 1.6 1.8 P(I F ) – P(60 mA) – RELATIVE POWER RATIO – dB P(I F ) – P(60 mA) – RELATIVE POWER RATIO IF - FORWARD CURRENT - mA 100 2.2 2.0 VI - FORWARD VOLTAGE - V Figure 9. Forward Voltage and Current Characteristics. Figure 10. Normalized Transmitter Output vs. Forward Current. +5 V + 2 ¼ 74F3037 4.7 µF Ry 12, 13 3 1 0.1 µF 15 16 RX2 RX1 RX3 C 14 4, 5 ¼ 74F3037 10 9 11 ¼ 74F3037 8 HFBR-14x2/x4 5 RX4 7 ¼ 74F3037 Figure 11. Recommended Drive Circuit. HP8082A PULSE GENERATOR SILICON AVALANCHE PHOTODIODE 50 Ω LOAD RESISTOR Figure 12. Test Circuit for Measuring tr, tf. 19 50 Ω TEST HEAD HIGH SPEED OSCILLOSCOPE HFBR-24x2 Low-Cost 5 MBd Receiver Description The HFBR-24x2 fiber optic receiver is designed to operate with the Agilent HFBR-14xx fiber optic transmitter and 50/ 125 µm, 62.5/125 µm, 100/ 140 µm, and 200 µm HCS® fiber optic cable. Consistent coupling into the receiver is assured by the lensed optical system (Figure 1). Response does not vary with fiber size ≤ 0.100 µm. The HFBR-24x2 receiver incorporates an integrated photo IC containing a photodetector and dc amplifier driving an opencollector Schottky output transistor. The HFBR-24x2 is designed for direct interfacing to popular logic families. The absence of an internal pull-up resistor allows the opencollector output to be used with logic families such as CMOS requiring voltage excursions much higher than VCC. Both the open-collector “Data” output Pin 6 and VCC Pin 2 are referenced to “Com” Pin 3, 7. The “Data” output allows busing, strobing and wired “OR” circuit configurations. The transmitter is designed to operate from a single +5 V supply. It is essential that a bypass capacitor (0.1 mF ceramic) be connected from Pin 2 (VCC) to Pin 3 (circuit common) of the receiver. Housed Product 2 6 7&3 4 3 2 1 COMMON 5 6 7 8 BOTTOM VIEW PIN 11 2 32 41 51 6 72 81 Vcc DATA PIN 1 INDICATOR FUNCTION NC V CC (5 V) COMMON NC NC DATA COMMON NC NOTES: 1. PINS 1, 4, 5 AND 8 ARE ELECTRICALLY CONNECTED 2. PINS 3 AND 7 ARE ELECTRICALLY CONNECTED TO HEADER Unhoused Product 1 4 2 3 PIN 1 2 3 4 FUNCTION VCC (5 V) COMMON DATA COMMON BOTTOM VIEW Absolute Maximum Ratings Parameter Symbol Min Max Units Storage Temperature TS -55 +85 °C Operating Temperature TA -40 +85 °C +260 10 °C sec 7.0 V 25 mA 18.0 V mW Lead Soldering Cycle Temp Time Note 1 -0.5 Supply Voltage VCC Output Current IO Output Voltage VO Output Collector Power Dissipation PO AV 40 Fan Out (TTL) N 5 20 Reference -0.5 Note 2 Electrical/Optical Characteristics -40 °C to + 85 °C unless otherwise specified Fiber sizes with core diameter ≤ 100 µm and NA ≤ 0.35, 4.75 V ≤ VCC ≤ 5.25 V Typ3 Max Units Conditions IOH 5 250 µA VO = 18 PR < -40 dBm Low Level Output Voltage VOL 0.4 0.5 V IO = 8 mA PR > -24 dBm High Level Supply Current ICCH 3.5 6.3 mA VCC = 5.25 V PR < -40 dBm Low Level Supply Current ICCL 6.2 10 mA VCC = 5.25 V PR > -24 dBm Equivalent NA NA 0.50 Optical Port Diameter D 400 Parameter Symbol High Level Output Current Min µm Reference Note 4 Dynamic Characteristics -40 °C to +85 °C unless otherwise specified; 4.75 V ≤ VCC ≤ 5.25 V; BER ≤ 10-9 Parameter Symbol Peak Optical Input Power Logic Level HIGH PRH Peak Optical Input Power Logic Level LOW PRL Min Typ3 Max Units Conditions Reference -40 0.1 dBm pk µW pk lP = 820 nm Note 5 -25.4 2.9 -9.2 120 dBm pk µW pk TA = +25 °C, IOL = 8mA Note 5 -24.0 4.0 -10.0 100 dBm pk µW pk IOL = 8mA TA = +25 °C, PR = -21 dBm, Data Rate = 5 MBd Propagation Delay LOW to HIGH tPLHR 65 ns Propagation Delay HIGH to LOW tPHLR 49 ns Note 6 Notes: 1. 2.0 mm from where leads enter case. 2. 8 mA load (5 x 1.6 mA), RL = 560 W. 3. Typical data at TA = +25 °C, V CC = 5.0 Vdc. 4. D is the effective diameter of the detector image on the plane of the fiber face. The numerical value is the product of the actual detector diameter and the lens magnification. 5. Measured at the end of 100/140 mm fiber optic cable with large area detector. 6. Propagation delay through the system is the result of several sequentially-occurring phenomena. Consequently it is a combination of data-ratelimiting effects and of transmission-time effects. Because of this, the data-rate limit of the system must be described in terms of time differentials between delays imposed on falling and rising edges. 7. As the cable length is increased, the propagation delays increase at 5 ns per meter of length. Data rate, as limited by pulse width distortion, is not affected by increasing cable length if the optical power level at the receiver is maintained. CAUTION: The small junction sizes inherent to the design of these components increase the components’ susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly of these components to prevent damage and/or degradation which may be induced by ESD. 21 HFBR-24x6 Low-Cost 125 MHz Receiver Description The HFBR-24x6 fiber optic receiver is designed to operate with the Agilent HFBR-14xx fiber optic transmitters and 50/ 125 µm, 62.5/125 µm, 100/140 µm and 200 µm HCS® fiber optic cable. Consistent coupling into the receiver is assured by the lensed optical system (Figure 1). Response does not vary with fiber size for core diameters of 100 mm 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 MBd. 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-24x6 receiver contains a PIN photodiode and low noise transimpedance preamplifier integrated circuit. The HFBR-24x6 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-24x6 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 10-9 BER). receiver from noisy host systems. Refer to AN 1038, 1065, or AB 78 for details. The frequency response is typically dc to 125 MHz. Although the HFBR-24x6 is an analog receiver, it is compatible with digital systems. Please refer to Application Bulletin 78 for simple and inexpensive circuits that operate at 155 MBd or higher. NOTES: 1. PINS 1, 4, 5 AND 8 ARE ISOLATED FROM THE INTERNAL CIRCUITRY, BUT ARE ELECTRICALLY CONNECTED TO EACH OTHER. 2. PINS 3 AND 7 ARE ELECTRICALLY CONNECTED TO HEADER The recommended ac coupled receiver circuit is shown in Figure 14. It is essential that a 10 ohm resistor be connected between pin 6 and the power supply, and a 0.1 mF ceramic bypass capacitor be connected between the power supply and ground. In addition, pin 6 should be filtered to protect the Housed Product 6 Vcc 2 ANALOG SIGNAL 3&7V EE 4 3 2 1 5 6 7 8 BOTTOM VIEW PIN 11 2 32 41 51 6 72 81 PIN 1 INDICATOR FUNCTION NC SIGNAL VEE NC NC VCC VEE NC Unhoused Product 1 4 2 3 PIN 1 2 3 4 FUNCTION SIGNAL VEE VCC VEE BOTTOM VIEW 6 BIAS & FILTER CIRCUITS VCC POSITIVE SUPPLY 300 pF 2 ANALOG VOUT SIGNAL 5.0 mA 3, 7 VEE NEGATIVE SUPPLY Figure 13. Simplified Schematic Diagram. CAUTION: The small junction sizes inherent to the design of these components increase the components’ susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly of these components to prevent damage and/or degradation which may be induced by ESD. 22 Absolute Maximum Ratings Parameter Symbol Min Max Units Storage Temperature TS -55 +85 °C Operating Temperature TA -40 +85 °C +260 10 °C sec 6.0 V 25 mA VCC V Lead Soldering Cycle Temp Time Reference Note 1 Supply Voltage VCC Output Current IO Signal Pin Voltage VSIG -0.5 -0.5 Electrical/Optical Characteristics -40 °C to +85 °C; 4.75 V ≤ Supply Voltage ≤ 5.25 V, RLOAD = 511 W, Fiber sizes with core diameter ≤ 100 mm, and N.A. ≤ -0.35 unless otherwise specified. Parameter Symbol Min Typ2 Max Units Conditions Reference Responsivity RP 5.3 7 9.6 mV/µW Note 3, 4 Figure 18 11.5 mV/µW TA = +25 °C @ 820 nm, 50 MHz @ 820 nm, 50 MHz 0.59 mV Note 5 0.70 mV Bandwidth filtered @ 75 MHz PR = 0 µW Unfiltered bandwidth PR = 0 µW -41.4 0.065 dBm µW Bandwidth Filtered @ 75MHz -7.6 175 dBm pk µW pk TA = +25 °C -8.2 150 dBm pk µW pk 4.5 RMS Output Noise Voltage VNO Equivalent Input Optical Noise Power (RMS) PN Optical Input Power (Overdrive) PR Output Impedance ZO dc Output Voltage VO dc Power Supply Current 0.40 -43.0 0.050 30 -4.2 W Test Frequency = 50 MHz -3.1 -2.4 V PR = 0 µW IEE 9 15 mA RLOAD = 510 W Equivalent NA NA 0.35 Equivalent Diameter D 324 µm Figure 15 Note 6 Figure 16 Note 7 CAUTION: The small junction sizes inherent to the design of these components increase the components’ susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly of these components to prevent damage and/or degradation which may be induced by ESD. 23 Dynamic Characteristics -40 °C to +85 °C; 4.75 V ≤ Supply Voltage ≤ 5.25 V; RLOAD = 511 W, CLOAD = 5 pF unless otherwise specified Typ2 Max Units Conditions Reference tr , t f 3.3 6.3 ns PR = 100 µW peak Figure 17 PWD 0.4 2.5 ns PR = 150 µW peak Note 8, Figure 16 2 % PR = 5 µW peak, tr = 1.5 ns Note 9 125 MHz -3 dB Electrical 0.41 Hz • s Note 10 Parameter Symbol Rise/Fall Time 10% to 90% Pulse Width Distortion Min Overshoot Bandwidth (Electrical) BW Bandwidth - Rise Time Product Notes: 1. 2.0 mm from where leads enter case. 2. Typical specifications are for operation at TA = +25 °C and VCC = +5 V dc. 3. For 200 µm HCS fibers, typical responsivity will be 6 mV/mW. Other parameters will change as well. 4. Pin #2 should be ac coupled to a load ³ 510 ohm. Load capacitance must be less than 5 pF. 5. Measured with a 3 pole Bessel filter with a 75 MHz, -3 dB bandwidth. Recommended receiver filters for various bandwidths are provided in Application Bulletin 78. 6. Overdrive is defined at PWD = 2.5 ns. 7. D is the effective diameter of the detector image on the plane of the fiber face. The numerical value is the product of the actual detector diameter and the lens magnification. 8. Measured with a 10 ns pulse width, 50% duty cycle, at the 50% amplitude point of the waveform. 9. Percent overshoot is defined as: VPK − V100% x 100% V100% 10. The conversion factor for the rise time to bandwidth is 0.41 since the HFBR-24x6 has a second order bandwidth limiting characteristic. 0.1 µF +5 V 10 Ω 6 30 pF 2 3&7 POST AMP LOGIC OUTPUT R LOADS 500 Ω MIN. Figure 14. Recommended ac Coupled Receiver Circuit. (See AB 78 and AN 1038 for more information.) CAUTION: The small junction sizes inherent to the design of these components increase the components’ susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly of these components to prevent damage and/or degradation which may be induced by ESD. 24 3.0 125 100 75 50 25 0 2.5 5.0 2.0 1.5 1.0 0.5 0 0 50 100 150 200 250 300 FREQUENCY – MH Z 1.25 1.00 0.75 0.50 0.25 0 400 480 560 640 720 800 880 960 1040 λ – WAVELENGTH – nm Figure 18. Receiver Spectral Response Normalized to 820 nm. www.agilent.com/ semiconductors For product information and a complete list of distributors, please go to our web site. For technical assistance call: Americas/Canada: +1 (800) 235-0312 or (916) 788-6763 Europe: +49 (0) 6441 92460 China: 10800 650 0017 Hong Kong: (+65) 6756 2394 India, Australia, New Zealand: (+65) 6755 1939 Japan: (+81 3) 3335-8152(Domestic/International), or 0120-61-1280(Domestic Only) Korea: (+65) 6755 1989 Singapore, Malaysia, Vietnam, Thailand, Philippines, Indonesia: (+65) 6755 2044 Taiwan: (+65) 6755 1843 Data subject to change. Copyright © 2003 Agilent Technologies, Inc. Obsoletes: 5980-1065E August 11, 2003 5988-3624EN 4.0 tf 3.0 tr 2.0 1.0 0 10 20 30 40 50 60 70 80 P R – INPUT OPTICAL POWER – µW Figure 15. Typical Spectral Noise Density vs. Frequency. NORMALIZED RESPONSE 6.0 t r, t f – RESPONSE TIME – ns PWD – PULSE WIDTH DISTORTION – ns SPECTRAL NOISE DENSITY – nV/ H Z 150 Figure 16. Typical Pulse Width Distortion vs. Peak Input Power. -60 -40 -20 0 20 40 60 80 TEMPERATURE – ˚C Figure 17. Typical Rise and Fall Times vs. Temperature. 100