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HFBR-0507ETZ series hfbr-1527etz transmitters hfbr-2526etz receivers 125 megabaud versatile link the versatile fiber optic connection data sheet features ? -40 to +85c operating temperature range ? rohs-compliant ? data transmission at signal rates of 1 to 125 mbd over distances of 100 m ? compatible with inexpen sive, easily terminated plastic optical fi ber, and with large core silica fi ber ? 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 confi guration applications ? intra-system links: board-to-board, rack-to-rack ? telecommunications switching systems ? computer-to-peripheral data links, pc bus extension ? industrial control ? proprietary lans ? renewable energies ? medical instruments ? reduction of lightning and voltage transient suscep- tibility hcs ? is a registered trademark of ofs corporation. description the 125 mbd versatile link (HFBR-0507ETZ series) is the most cost-eff ective fi ber-optic solution for transmission of 125 mbd data over 100 m. the data link consists of a 650 nm led transmitter, hfbr-1527etz, and a pin/ preamp receiver, hfbr-2526etz. these can be used with low-cost plastic or silica fi ber. one mm diameter plastic fi ber provides the lowest cost solution for distances under 25 m. the lower attenuation of silica fi ber allows data transmission over longer distance, for a small diff erence in cost. these com po nents can be used for high speed data links without the problems common with copper wire solutions, at a competitive cost. the hfbr-1527etz transmitter is a high power 650 nm led in a low cost plastic housing designed to effi ciently couple power into 1 mm diameter plastic optical fi ber and 200 ? m hard clad silica (hcs ? ) fi ber. with the recom mended drive circuit, the led operates at speeds from 1-125 mbd. the hfbr-2526etz is a high band width analog receiver con- tain ing a pin photodiode and internal transimpedance amplifi er. with the recommended applica tion circuit for 125 mbd operation, the performance of the complete data link is specifi ed for of 0-25 m with plastic fi ber and 0-100 m with 200 ? m hcs ? fi ber. a wide variety of other digitizing circuits can be combined with the HFBR-0507ETZ series to optimize performance and cost at higher and lower data rates.
2 HFBR-0507ETZ series 125 mbd data link data link operating conditions and performance are specifi ed for the hfbr-1527etz transmitter and hfbr-2526etz receiver in the recommended applications circuits shown in figure 1. this circuit has been optimized for 125 mbd operation. for other data rate application, please refer to application notes: an1121, an1122 and an1123. recommended operating conditions for the circuits in figures 1 and 2 parameter symbol min. max. unit reference ambient temperature t a -40 85 c supply voltage v cc +4.75 +5.25 v data input voltage C low v il v cc -1.89 v cc -1.62 v data input voltage C high v ih v cc -1.06 v cc -0.70 v data output load r l 45 55 ? note 1 signaling rate f s 1 125 mbd duty cycle d.c. 40 60 % note 2 link performance 1-125 mbd, ber 10 -9 , under recommended operating conditions with recommended transmit and receive application circuits. parameter symbol min. [3] typ. [4] max. unit condition reference optical power budget, 1 m pof opb pof 11 16 db note 5,6,7 optical power margin, 20 m standard pof opm pof,20 3 6 db note 5,6,7 link distance with standard 1 mm pof l 20 27 m optical power margin, 25 m low loss pof opm pof,25 3 6 db note 5,6,7 link distance with extra low loss 1 mm pof l 25 32 m optical power budget, 1 m hcs opb hcs 7 12 db note 5,6,7 optical power margin, 100 m hcs opm hcs,100 3 6 db note 5,6,7 link distance with hcs cable l 100 125 m notes: 1. if the output of u4c in figure 1, page 4 is transmitted via coaxial cable, terminate with a 50 ? resistor to v cc - 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 specifi cations of the hfbr-1527etz transmitter, hfbr-2526etz receiver, and pof cable, and the typical performance of other components (e.g. logic gates, transistors, resistors, capacitors, quantizer, hcs ca ble). 4. typical performance is at 25 c, 125 mbd, and is measured with typical values of all circuit components. 5. standard cable is hfbr-rxxyyyz plastic optical fi ber, with a maximum attenuation of 0.24 db/m at 650 nm and na = 0.5. extra low loss cable is plastic optical fi ber, with a maximum attenuation of 0.19 db/m at 650 nm and na = 0.5. hcs cable is glass optical fi ber, with a maximum attenuation of 10 db/km at 650 nm and na = 0.37. 6. optical power budget is the diff erence between the transmitter output power and the receiver sensitivity, measured after 1 m of fi ber. 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 eff ects of attenuation and modal dispersion for the minimum link distance: opm = opb C (attenuation power loss + modal dispersion power penalty). the minimum opm is the margin available for long term le d lop degradation and additional fi xed passive losses (such as in-line connectors) in addition to the minimum specifi ed distance.
3 plastic optical fiber (1 mm pof) transmitter application circuit performance of the hfbr-1527etz 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 p avg -9.7 dbm 50% duty cycle note 1, fig 3 average modulated power 1 mm pof p mod -11.3 dbm note 2, fig 3 optical rise time (10% to 90%) t r 2.1 ns 5 mhz optical fall time (90% to 10%) t f 2.8 ns 5 mhz high level led current (on) i f,h 19 ma note 3 low level led current (off ) i f,l 3 ma note 3 optical overshoot C 1 mm pof 45 % transmitter application circuit current consumption C 1 mm pof i cc 110 ma figure 1 hard clad silica fiber (200 m hcs) transmitter application circuit performance of the hfbr-1527etz 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 p avg -14.6 dbm 50% duty cycle note 1, fig 3 average modulated power 200 m hcs p mod -16.2 dbm note 2, fig 3 optical rise time (10% to 90%) t r 3.1 ns 5 mhz optical fall time (90% to 10%) t f 3.4 ns 5 mhz high level led current (on) i f,h 60 ma note 3 low level led current (off ) i f,l 6 ma note 3 optical overshoot C 200 ? m hcs 30 % transmitter application circuit current consumption C 200 ? m hcs i cc 130 ma figure 1 notes: 1. average optical power is measured with an average power meter at 50% duty cycle, after 1 m of fi ber. 2. to allow the led to switch at high speeds, the recommended drive circuit modulates led light output between two non-zero po wer levels. the modulated (useful) power is the diff erence 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 defi ned as one half the slope of the average power versus duty cycle: [p avg @ 80% duty cycle C p avg @ 20% duty cycle] average modulated power = (2) [0.80 C 0.20] 3. high and low level led currents refer to the current through the hfbr-1527etz 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.
4 figure 1. transmitter and receiver application circuit with +5 v ecl inputs and outputs. plastic and hard clad silica optical fiber receiver application circuit performance [4] of the hfbr-2526etz 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 C low v ol v cc -1.7 v r l = 50 ? note 5 data output voltage C high v oh v cc -0.9 v r l = 50 ? note 5 receiver sensitivity to average modulated optical power 1 mm pof pm in -27.5 dbm 50% eye opening note 2 receiver sensitivity to average modulated optical power 200 ? m hcs p min -28.5 dbm 50% eye opening note 2 receiver overdrive level of average modulated optical power 1 mm pof p max -7.5 dbm 50% eye opening note 2 receiver overdrive level of average modulated optical power 200 ? m hcs p max -10.5 dbm 50% eye opening note 2 receiver application circuit current consumption i cc tba ma r l = ? figure 1 notes: 4. performance in response to a signal from the hfbr-1527etz transmitter driven with the recommended circuit at 1-125 mbd over 1 m of hfbr-rz/ exxyyyz plastic optical fi ber or 1 m of hard clad silica optical fi ber. 5. terminated through a 50 ? resistor to v cc C 2 v. 6. if there is no input optical power to the receiver, electrical noise can result in false triggering of the receiver. in typi cal applications, data encoding and error detection prevent random trigger ing from being interpreted as valid data. 1 2 3 4 5 8 u2a hfbr-15x7etz u1c 74actq00 q3 mmbt3904lt1 8 11 6 10 9 + u1d 74actq00 13 12 u1b 74actq00 u1a 74actq00 5 4 3 2 1 l1 tdk #hf30acb453215 c7 0.001 p f +5 v td+ r8 tdC c6 0.1 p f c5 10 p f c4 0.001 p f c3 0.1 p f c2 0.1 p f c1 0.001 p f r9 c8 r10 r6 91 r7 91 r11 r5 22 q2 bft92 q1 bft92 0 v 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 mc2045-2y 1 2 3 4 5 8 u3a hfbr- 2526etz r13 4.7 r12 4.7 + c9 0.1 p f c10 0.1 p f c12 10 nf c11 10 nf c14 10 nf c13 1 nf r18 2.2k r17 2.2k r14 800 c19 0.1 p f c21 0.1 p f l3 coilcraft 1008ls-122xkbc l2 coilcraft 1008ls-122xkbc rd+ rd- sd+ 0 v +5 v caz- caz+ gdna din din vcca cf jam nc vcce dout dout gdne st st vset + c20 10 p f + c22 10 p f
5 figure 2. recommended power supply fi lter and +5 v ecl signal terminations for the transmitter and receiver application circuit of figure 1 figure 4. typical optical power budget vs. data rate figure 3. average modulated power 8 td 9 t x v ee 7 td 6 t x v cc 5 r x v cc 4 3 rd 2 rd 82 10 f 0.1 f 4.7 h 0.1 f 1 r x v ee +5 v ecl serial data source 0.1 f 0.1 f 82 120 120 +5 v ecl serial data receiver 4.7 h 10 f + + + ? 5 v 82 82 120 120 fiber-optic transceiver shown in figure 1 4.7 h average power ? w 200 100 0 duty cycle ? % 150 50 0 20 40 80 100 60 average power, 50% duty cycle average modulated power optical power budget ? db 21 15 9 data rate ? mbd 19 11 17 13 10 90 70 130 150 110 30 50 pof hcs
6 125 megabaud versatile link transmitter hfbr-1527etz series description the hfbr-1527etz transmitters incorporate a 650 nano- meter led in a horizontal (hfbr-1527etz) gray housing. the hfbr-1527etz transmitters are suitable for use with current peaking to decrease response time and can be used with hfbr-2526etz receivers in data links operating at signal rates from 1 to 125 megabaud over 1 mm diameter plastic optical fi ber or 200 ? m diameter hard clad silica glass optical fi ber. absolute maximum ratings parameter symbol min. max. unit reference storage temperature t s -40 85 c operating temperature t o -40 85 c lead soldering temperature cycle time 260 10 c s note 1, 9 transmitter high level forward input current i f,h 120 ma 50% duty cycle 1 mhz transmitter average forward input current i f,av 60 ma reverse input voltage v r 3v anode 1 cathode 2 ground 3 ground 4 ground ground see note 6 caution: the small junction sizes inherent to the design of this component increase the components suscep ti bility 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 may expose the eye beyond the maximum permissible exposure recommended in ansi z136.2, 1993. under most viewing conditions there is no eye hazard.
7 electrical/optical characteristics -40 to 85 c , unless otherwise stated. parameter symbol min. typ. [2] max. unit condition note transmitter output peak optical power, 1 mm pof p t -9.5 -10.4 -7.0 -4.8 -3.5 dbm i f,dc = 20 ma, 25 c -40 - 85 c note 3 na=0.5 transmitter output peak optical power, 1 mm pof p t -6.0 -6.9 -3.0 -0.5 0.8 dbm i f,dc = 60 ma, 25 c -40 - 85 c note 3 na=0.5 transmitter output peak optical power, 200 ? m hcs ? p t -14.6 -16.0 -13.0 -10.5 -9.2 dbm i f,dc = 60 ma, 25 c -40 - 85 c note 3 na=0.x output optical power temperature coeffi cient ? p t ? t -0.02 db/ c peak emission wavelength ? pk 635 650 662 nm peak wavelength temperature coeffi cient ??? ? t 0.12 nm/ c spectral width fwhm 21 nm full width, half maximum forward voltage vf 1.8 2.1 2.65 v i f = 60 ma forward voltage temperature coeffi cient ? v f ? t -1.8 mv/c thermal resistance, junction to case ? jc 140 c/w note 4 reverse input breakdown voltage v br 3.0 13 v i f,dc = -10 ? a diode capacitance c o 60 pf v f = 0 v, f = 1 mhz unpeaked optical rise time, 10% C 90% t r 10 ns i f = 60 ma f = 100 khz figure 1 note 5 unpeaked optical fall time, 90% C10% t f 11 ns i f = 60 ma f = 100 khz figure 1 note 5 notes: 1. 1.6 mm below seating plane. 2. typical data is at 25 c. 3. optical power measured at the end of either 0.5m of 1mm diameter pof (na=0.5) or 5m of 200 um diameter hcs (na=0.37) with a large area detector. 4. typical value measured from junction to pc board solder joint for horizontal mount package, hfbr-1527etz. 5. optical rise and fall times can be reduced with the appropriate driver circuit. 6. pins 5 and 8 are primarily for mounting and retaining purposes, but are electrically connected; pins 3 and 4 are electrical ly 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 fi ber. 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. 9. moisture sensitivity level is msl-4
8 figure 6. typical spectra at 25 c figure 5. test circuit for measuring unpeaked rise and fall times figure 7. typical forward voltage vs. drive current figure 8. typical normalized output optical power vs. drive current norma lize d sp e c t ra l ou t pu t po we r 1 .2 0.6 0 w a vele ng th (nm) 1 .0 0.2 0.8 0.4 620 630 650 670 680 660 640 25 c h p8082a pu l s e g e n e ra t or 50 w l oad r e s i s t or h p54002a 50 w bnc i npu t pod h p54 1 00a osc ill oscop e bcp mod el 300 500 m hz band wi d th s ili con a v a l anc he p h o t od i od e 1 .6 1 .7 1 .8 1 .9 2 2. 1 2.2 2.3 2.4 11 0 1 00 - 40 25 85 i f- dc - t ransm itte r dr ive curr e n t (m a ) v f - f or w ard v o lt ag e - v -1 6 -1 4 -1 2 -1 0 - 8 - 6 - 4 - 2 0 2 11 0 1 00 i f- dc - t ransm itte r dr ive curr e n t (m a ) p t - norma lize d ou t pu t po we r - db - 40 25 85
9 125 megabaud versatile link receiver hfbr-2526etz series description the hfbr-2526etz receivers contain a pin photodiode and transimpedance pre-amplifi er circuit in a horizontal (hfbr-2526etz) blue housing, and are designed to inter- face to 1 mm diameter plastic optical fi ber or 200 ? m hard clad silica glass optical fi ber. 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 require ments. electrical bandwidth greater than 65 mhz allows design of high speed data links with plastic or hard clad silica optical fi ber. absolute maximum ratings parameter symbol min. max. unit reference storage temperature t s -40 85 c operating temperature t a -40 85 c lead soldering temperature cycle time 260 10 c s note 1, 11 signal pin voltage v o -0.5 v cc v supply voltage v cc -0.5 6.0 v output current i o 25 ma caution: the small junction sizes inherent to the design of this component increase the components suscep ti bility 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. 1 2 ground 3 4 ground ground see notes 2, 4, 9 ground signal v cc
10 electrical/optical characteristics -40 to 85 c; 5.25 v v cc 4.75 v; power supply must be fi ltered (see figure 1, note 2) parameter symbol min. typ. max. unit test condition note ac responsivity 1 mm pof r p,apf 1.7 3.9 6.5 mv/ ? w 650 nm note 4 ac responsivity 200 m hcs r p,hcs 4.5 7.9 11.5 mv/ ? w rms output noise v no 0.46 0.69 mvrms note 5 equivalent optical noise input power, rms C 1 mm pof p n,rms - 39 -36 dbm note 5 equivalent optical noise input power, rms C 200 m hcs p n,rms -42 -40 dbm note 5 peak input optical power C 1 mm pof p r -5.8 -6.4 dbm dbm 5 ns pwd 2 ns pwd note 6 peak input optical power C 200 ? m hcs p r -8.8 -9.4 dbm dbm 5 ns pwd 2 ns pwd note 6 output impedance z o 30 50 mhz note 4 dc output voltage v o 0.8 1.8 2.6 v pr = 0 ? w supply current i cc 915 ma electrical bandwidth bw e 65 125 mhz -3 db electrical bandwidth * rise time 0.41 hz * s electrical rise time, 10C90% t r 3.3 6.3 ns pr = -10 dbm peak electrical fall time, 90C10% t f 3.3 6.3 ns pr = -10 dbm peak pulse width distortion pwd 0.4 1.0 ns pr = -10 dbm peak note 7 overshoot 4 % pr = -10 dbm peak note 8 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 fi ltered as in figure 1. 3. typical data are at 25 c and v cc = +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 fi lter with a 75 mhz, -3db 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. p r,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 defi ned at: (v pk - v 100% ) CCCCCCCCCCCC ? 100% v 100% 9. pins 5 and 8 are primarily for mounting and retaining purposes, but are electrically connected. it is recommended that thes e 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 r andom triggering from being interpreted as valid data. 11. moisture sensitivity level is msl-4
11 figure 9. recommended power supply fi lter circuit figure 10. simplifi ed receiver schematic figure 11. typical pulse width distortion vs. peak input power figure 12. typical output spectral noise density vs. frequency figure 13. typical rise and fall time vs. tempera- ture hfbr-25x6etz
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 ? 2005-2011 avago technologies. all rights reserved. av02-2590en - august 10, 2011 versatile link mechanical dimensions versatile link printed circuit board layout dimensions horizontal modules hfbr-1527etz hfbr-2526etz 6.86 (0.270) 10.16 (0.400) 4.19 (0.165) 1.27 (0.050) 2.54 (0.100) 0.51 (0.020) 18.8 (0.74) 2.03 (0.080) 7.62 (0.30) 0.64 (0.025) 7.62 (0.300) 2.77 (0.109) 1.85 (0.073) 0.64 (0.025) dia. 5.08 (0.200) 3.81 (0.150) max. 3.56 (0.140) min. 4 1 3 2 5 8 7.62 (0.300) 1.01 (0.040) dia. 1.85 (0.073) min. pcb edge top view 2.54 (0.100) 7.62 (0.300) horizontal module top views dimensions in millimeters (inches). electrical pin functions pin no. transmitters hfbr-1527etz receivers hfbr-2526etz 1 anode signal 2 cathode ground 3 ground* ground 4 ground* vcc (+5 v) 5 ground** ground** 8 ground** ground** * no internal connection ** pins 5 and 8 connected internally to each other only.

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