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SPF BFT 003 03
Optical Bidirectional Transceiver for byteflight
Data Sheet
Short description of complete functional unit
The device consists of a LED mounted on a large area photodiode for bidirectional optical transmission in half duplexmode.LEDandphotodiodearedrivenbythemultifunctionICE100.34C2fromELMOS. The transmitting and receiving functional units with ELMOS-IC E100.34C2 may be split into the following blocks:
Features
* Opticaltransmitterandreceiverformaximumdatarate 10Mbaud(halfduplexburstmode) * Transmitter: LED with 650 nm for working in low attenuationrangeofPMMAfiber * Receiver: Photodiode with preamp, digitizer with DC eliminationcircuit(trackeddecisionthreshold),Sleep- andWake-up-Function,outputstage(electricaloutput driver) * Built in transmitter and receiver gate for half duplex mode(mutualblockingoftransmitterandreceiver) * Operationat5Vor8V-11Vpowersupplyvoltage * Built in pulse width detection for indicating Sync, Alarm and continuous light on (integrated time basis to differentiate and evaluate Sync, Alarm and ContinuousLightconditionsAlarmoutput)
VDD2
* Diagnosefunctionforphotocurrent * Mechanical assembly: 6 Pin CAI package for easy couplingofPOF(plasticopticalfiber)withinsert
Transmitter LED Driver LEDO Transmitter /Receiver Gate LED
GND VDD1
DO
PDI
DI
ALARM Receiving amplifier
Photodiode
Figure 1. Basic functional units of SPF BFT3 03
Safety Hints Applications of new chip technologies lead to increasing optical efficiency and growing and higher levels of optical performance. We therefore recommend that the current versions of the IEC 60825-1 and EN60825-1standardsaretakenintoaccountrightfromtheoutset,i.e.attheequipmentdevelopmentstage,and thatsuitableprotectionfacilitiesareprovided.
Basic Specification
Absolute maximum ratings
Parameter Storage Temperature Range Operating Temperature Range Soldering Temperature ( 10 seconds more than 4,5 mm apart from package; details see app. note) Maximum optical input power onto receiver Symbol TSTG TA TS PoptmaxRec min - 40 - 40 max 100 85 35 5 Unit C C C mW
Parameter Voltages against GND: Supply Voltage Signal Input DI Signal Output DO Output ALARM Output DO shortening time [1] Current into Alarm-pin (active Alarm state)
Symbol VDD1 Vinm Voutm Voutm tsDO IAlarm
min - 0,3 - 0,3 - 0,3 - 0,3 -
max 16 6 6 16 1 10
Unit V V V V s mA
Notes: 1. TheelectricaloutputDOmaybeshortenedforashortperiodoftimetsDO.DuringthistimethevoltageatDOhastobewithin0V<=VDO<=5V
Operating Conditions
Allthedatainthisspecificationrefertothefollowingoperatingconditionsunlessotherwisestated. Parameter Supply Voltage Supply Voltage, optional Datarate Duration of one bit Duration of sync pulse Duration of Alarm pulse Bright phase Wake-up Impulse Dark phase Wake-up Impulse Symbol VDD1 VDD1 DBR tbit tsync talarm tplwu tpdwu ,9 1,9 6 6 100 3 6,4 6,4 3,1 ,1 6,8 6,8 min 4,75 7,8 typ 5 9 max 5,5 11,3 10 Unit V V Mbit/s ns s s s s
Caution:Usageofthedeviceoutofthemaximumrangesgiveninthischaptermaydamagethetransceiver!
Interface Description
Pinning
Pin 1 3 4 5 6 Pin-Name DI ALARM VDD1 VDD GND DO Description Signal Input/Data In Alarm out (open drain) positive power supply internally regulated power supply Ground Signal Output/Data out (push-pull)
Optical Signals
Name LEDO PDI (=LEDI) Description optical Signal, emitted of Transceiver optical Signal, received of Transceiver Light on 1 1 Light off 0 0
Note: TransmitterandReceiverinvertthesignals,whichmeansthat - instandardtransmittingmode:lowlevel(0V)atDIcausestheilluminationoftheLED(LEDO1"=lighton)andviceversa, - instandardreceivingmode:nolightontothePhotodiode(PDI0"=lightoff )causesoutputof5VatDOandviceversa.
Detailed Specification
Optical Function Transmitter
ElectricalandOpticalCharacteristicsofLEDandDriver: Parameter Data Rate Optical Output Power (peak) Optical Output Power (peak) Optical Output Power (peak) 1mm Standard PMMA fiber 30cm optimum coupling, 0h, TA=5C 1mm Standard PMMA fiber 30cm optimum coupling, 0h, -40C....+85C 1mm Standard PMMA fiber 30cm optimum coupling, over lifetime, -40C.....+85C 10% to 90% +5C -40C.....+85C Popt5 Popt-40 -+85 Popt-40- +85/life Conditions Symbol Min.
[]
Typ.
Max. 10
Unit Mbit/s W(dBm) W(dBm)
74(-5,6) 166(-7,8) 13(-8,8)
450(-3,5) 740(-1,3) 1000(0)
150(+1,0) W(dBm)
Optical Rise Time, Optical Fall Time Pulse Width Distortion, Optical Signal Peak emission wavelength Peak emission wavelength
tr, tf PWDTrans Peak Peak -5 640 630 650 650
35 +5 660 670
ns ns nm nm
Notes: 2. Limitationduetoelectricalpowerdissipation:Dutycyclefor>1s:10%,Dutycyclefor<1s:50%
General remark:Notallmentionedparametersaresubjecttoproductiontest! 3
Optical Function Receiver
Electricalandopticalcharacteristicsofreceivingphotodiodewithamplifierinhighspeeddatareceiving(active)mode: Parameter Data Rate Pulse Width Distortion [3] Pulse Width Start pulse Maximum receiveable power Minimum receiveable power Recovery time after last transmitted bit Pmin Signal at DO according PWDRec Signal at DO according PWDRec PWDRec PWStart Pmax [4] Pmin [4] trec - 5 500 800(-1,0) 0(-17) 1,1 600 Conditions Symbol Min. Typ. Max. 10 + 5 660 Unit Mbit/s ns ns W(dBm) W(dBm) s
Notes: 3. ThePulseWidthDistortionistestedwithaworstcasepatternatacertainsinglehighpulseP1ofthestandardpatternsomebitsafterstartingthe burst. 4. AllOpticalPowerDataarepeakvalues.
Static Characteristics
Parameter Peak Supply Current in active mode [] Supply current in active mode Supply current in stand-by mode Low Level Input Voltage DI High Level Input Voltage DI Low Level Output Voltage DO High Level Output Voltage DO Low Level Output Voltage ALARM Input Capacitance at DI Optical Power Threshold for photo current diagnosis [5] Internally regulated voltage Leackage current at DO Vdd1 = 8V - 11V Vdd1 = 0V;VDO = 5V; +85C I = 1mA I = -1mA I = 5mA Condition LED on LED off 10ms after tsleepmax Symbol Idda Idda IStby VIL VICH VOLD VOHD VOLA CDI PDIAG VDD ILDO 4,7 -3 0 0 3,7 0 30 min typ max 50 10 45 0,8 6 0,4 5 0,4 5 1(-19,) 0(-17) 5,3 +3 Unit mA mA A V V V V V pF W(dBm) V A
Notes: 2. Limitationduetoelectricalpowerdissipation:Dutycyclefor>1s:10%,Dutycyclefor<1s:50% 5. Measuredonlyat+85C
4
Dynamic Characteristics
Parameter Signal delay (LEDI -> DO) Signal delay (DI - > LEDO) Rise and fall time on DO Wake-up time [6] Sleep-in time [7] Continuous light on time
[8]
Condition
Symbol tdel-Rx tdel-Tx
min
typ
max 30 30
Unit ns ns ns ms ms s ns ns ns s ns
CL= 30pF
tr, tf twu tsl tcl tlocke tlocko tpdi twdi tddi 10 10 700 300 80 1,17 10
30 10 0 11,4 15 1100 700 100 1,3 0 10
Locking time with el. signal [9] Locking time with opt. signal [10] Duration of diagnosis impulse Pause before diagnosis impulse Delay diagnosis impulse
Notes: 6. Timebetweenthefirstopticalwake-uppatternandswitchingintoactivemode 7. Timebetweentransmittinglastbitandswitchingintosleepmode 8. Durationfordetectionofcontinuouslight 9. AfterrecognizingHighlevelsontheinternaldatapathatthelockswitchinput(seeblockwiringdiagram),theotherrelevantchannelisblocked forthisperiod.ThistimecannotbemeasuredatwaferlevelandthereforealsonotattheByteflightmodule. 10.AfterrecognizingHighlevelsontheinternaldatapathatthelockswitchinput(seeblockwiringdiagram),theotherrelevantchannelisblocked forthisperiod.
Functional description
Block wiring diagram
Diagnose LEDI & DO-Treiber DO
Peak-Det. Lock VDD1 GND Wake-up Det. Biasgenerator Lock Zeitbasis Timer ModusSteuerung Alarm ALARM
DI
Inv
&
LED-Treiber
LEDO
5
Functional description
The IC comprises of the functional groups as shown in the block wiring diagram which are defined in more detailbelow. Thefollowingappliesinstandardmode: LowleveltoDlmeansLEDdriverisactiveandtherefore theLEDisemittinglight. Iflightfallsontothephotodiode,theDOdriverbecomes activeandproduceslowlevelonDO.
Locking
Toavoidmutualinterferenceduringdatatransfer,transmitter and receiver are mutually locked. During active level at its input, the functional group identified as lock in the block wiring diagram blocks the other channel. Thetrailingedgeisdelayedbytlockandthenreleasesthe corresponding channel. Switching can be re-triggered. IfHlevelsoccuronbothchannelsatthesametime,the channeltobeblockedisnotdefined.Ifcontinuouslight has been detected by the receiver, the locking for the transmitting channel is released to enable transmitting evenduringcontinuouslightsituation.
Receiver component
The preamplifier in the receive component forms a current/voltage converter which converts the photo- current from the receive diode into a voltage.The functional group peak detector ensures a signal-dependent tracking of the reference voltage and compensates destructive offset influences like dark current of the photodiode. In the Sleep mode, the receiver operates at a very low supply current. Signal wake-up sequences are integratedandifthewake-upthresholdisexceeded,the activemodeisswitchedon. The DO output stage is a Push /Pull driver (active L, inactiveH).Thedrivercanbeblockedbythetransmitter component.
Alarm
Analarmisdetectedifapulsewithpulselengthtalarmis recognised.Thealarmoutputdriver(OpenDrainLowside) isthenstaticallyswitchedon.Thedriverisswitchedoffas soon as a Sync-Pulse is registered by the receiver, with PON and continuous light and in sleep mode. Alarm detection is only possible if there was a normal sync pulsereceivedbefore.
Time basis and timer
An internal oscillator establishes the local time basis of the module. In order to achieve the required accuracy, the frequency is individually adjusted on each die. This tuningismadeoncebythechipmanufacturerduringthe wafermeasurement. Thetimerunitchecksalldatapulsesfortheirlengthand distinguishes between sync-pulses, alarm pulses and continuous light. Sync and alarm pulses must fulfil the time conditions stated under topic Operating Conditions.Continuouslightisrecognisedataminimumpulse duration of typical 11,4 s. For evaluation of continuouslightontime114pulsesoftheinternaloscillatorare counted.Thetimeofperiodoftheinternaloscillatormay beevaluatedaccordingtothefollowingformula: Tosc=tcl/114 tcl=continuouslightontime
Transmitter component
TheelectricalsignaltoDIisinvertedandsenttotheLED Driver via a AND logic gate.The LED driver supplies the transmitdiodewithatypicalcurrentof30mA(peak).The drivercanbeblockedbythereceiverpart.
pulse type alarm min max sync min max
duration [ns] 000 1900 100 3000 900 3100
max. time of period 19,03 1,58 135,48 117,65 113,73 11,57
min. time of period 85,11 80,85 89,36 86,96 84,06 89,86
6
Mode control
Themodecontrolchecksandevaluatesthesignalsofthe timerunitandthepower-onsignal.Thefollowingactions aretriggeredondependenceoftheresultoftheevaluation: * Power-On When the operating voltage is applied, a PON signal is generated internally.This resets all functional units andnormalmodeistakenbytheIC.Thealarmoutput isinactive. A Power-On signal is generated at each raising of VDD2. Moreover, a Power-On signal is created when the power supply goes in the controlled mode up to VDD1 overriding a threshold of 7V.The internal reset signal is created by prolongation of the Power-On signalwith3,4ms.DOandLEDOarelockedduringthe reset. * Syncpulse Innormalmode,thesyncpulsesimplypassesthrough to the output. If an alarm pulse has previously been identified,thealarmconditionisclearedandthealarm outputisswitchedoff. * Alarmpulse In normal mode, after an alarm pulse has been identified, the alarm condition is accepted and the alarm output is switched on. If further alarm pulses are identified, the alarm condition is sustained. It is possible to clear the alarm condition by receiving a valid sync pulse or by PON or by reached sleep mode or if continuous light is identified. In the alarm condition, data transfer takes place exactly as in normal mode. After Wake-up or PON the AlarmOutputisactivatednotbeforetherecognisingofthe firstSync-Pulse. * Continuouslight If continuous light is identified on the bus (light duration > continuous light on time), the electrical outputDOisblockedinordertoavoidablockadeof theentirebus.Anexistingalarmconditioniscleared. The block for DO is cleared if a valid sync or alarm pulse is identified on the electrical or optical inputs andifthereisnocontinuouslightatthereceiverany more. Continuous light can only be identified by the opticalreceiver.
Sy nc Sy nc Alarm
Sleep-Mode and Wake-up
Afterthetimetsl.theIC/circuitchangeshisinternalstatus tothesleepmodeifnolightispresentandalsoifcontinuouslightispresent.Inthesleepmode,onlyaveryslow receiverandthewake-updetectorareactive,inorderto achieveverylowpowerconsumption. The receiving diode integrates signals at the optical input. If the wake-up level is exceeded, the wake-up detectoractivatesthechip.Forwake-upviaaopticalway, continuouslyalternatingdark/brightpulsesarenecessary forthedurationoftwu.Thetimingofthesepulsehasto beaccordingthespecunderchapterBasicSpecification (parameter: bright phase wake-up impulse, dark phase wake-upimpulse). The wake-up signal has the effect of a reset and is also prolongedby3,4msinordertogivetheanaloguecomponentsenoughtimeforswitchingon.Thistime(3,4ms) iscontainedintwu.Immediatelyafterwakeupthecontinuouslightrecognitionisblocked.Therehavetobeat least8pulsesrecognisedattheopticalinputtoactivate thecontinuouslightrecognitionagain.Thisistoavoidan incorrect continuous light recognition during the wakeupphase. An immediate wake-up also occurs when a H/L flank appearsatDI.PulsesatDIappearatonceatLEDO(only IC internal delay). For the optical path the reset prolongation is valid at wake-up via DI. Due to the transient responseoftheIC,thefirstdatabits,whicharetransferred afteractivation,maybeincorrect.
Alarm
Sy nc opt. Bus
Alarm ausgang
7
Photocurrent indication
The logic of the IC (internal analog diagnosis) is able to recognize photocurrents, which lie below a certain predefined value.This feature accomplishes to issue a early warningiftheopticallinkgetsworse. Incaseoflowphotocurrentatfirstthereisnodifference to the normal receiving mode. If the module goes in transmittingmodethefollowingwarningisgiven: 1. The transceiver is testing if there was a pause of minimum13clockcyclesoftheinternaloscillator(typ. 1,3 s) the time ahead of the High/Low-transition on DI 2.IfthisbreakwasrecognizedandL-levelisonDI,than at DO after tddi there is a pulse of minimum 1 clock cycle of the internal oscillator (typ. 100ns).This pulse has to be detected from the connected interface module. Withthisfeaturealowlevelofphotocurrentcanalways bedetectedduringthestartsequenceorduringthesync pulseifthetransceiverisintransmittingmode.
ESD - Protective connection
All input and output pins of the IC have protective connectionsinternally. ESDprotectiveconnectionsaretestedinaccordancewith EOS/ESD-DS5.3(SDM;SocketedDeviceModel)underthe followingconditions: VIN=250/500/1000Volt ESDprotectiveconnectionsaretestedinaccordancewith EIA/JESD22-A114 (HBM Human Body Model) under the followingconditions: Vin=500/1000/1500/2000/2500Volt
Fotocurrent normal
DO DI
Fotocurrent too small
DO
typ. 100 ns
DI
min. 13 int. clock cycle (typ. 1,3 us) min. 2 int. Clock cycle (typ. 200 ns)
8
Application Circuitry
Lookingtotheopticalinterfacethefollowingapplication circuitryshouldbeused:
1
2
3
4
5
6
Pin 1 3
Pin-Name DI ALARM VDD1
comment/requirement connection with 470 Kohm to VDD or 10 KOhm to external 5 V; Note: maximum signal input voltage at DI is 6 V! open drain output with minimum KOhm to Vdd=9V or with minimum 1 KOhm to Vdd=5V so that maximum current at Alarm=0V is 5 mA power supply (5 V or 9 V), connected with 100 nF...1F depending on application and 100 F (ESR @ 10Hz < 18,6 Ohm, ESR @ 10kHz < 9,5 Ohm, over hole temperature range, critical at -40C) block capacitors to Ground. If several BFT modules are operated in parallel, these values have to be adjusted (usually higher values have to be used) and verified within the application. connected with 0 nF....1F (depending on application) block capacitor to Ground short, direct connection to System Ground Signal Output/Data out (push-pull)
4 5 6
VDD GND DO
9
Mechanical Design SPF BFT 003 03: CAI package (cavity as interface)
Forfurtherdetailsrefertoseparatedrawings.
10
Disclaimer
The information herein is given to describe certain components and shall not be considered as a guarantee of characteristics. Termsofdeliveryandrightstotechnicalchangereserved.Weherebydisclaimanyandallwarranties,includingbut notlimitedtowarrantiesofnon-infringement,regardingcircuits,descriptionsandchartsstatedherein.
Warnings
Duetotechnicalrequirementscomponentsmaycontaindangeroussubstances.ForinformationonthetypesinquestionpleasecontactyournearestAvagoTechnologiesOffice. AvagoTechnologiesComponentsmayonlybeusedinlife-supportdevicesorsystemswiththeexpresswritten approvalofAvagoTechnologies,ifafailureofsuchcomponentscanreasonablybeexpectedtocausethefailure ofthatlife-supportdeviceorsystem,ortoaffectthesafetyoreffectivenessofthatdeviceorsystem.Lifesupport devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustainand/orprotecthumanlife.Iftheyfail,itisreasonabletoassumethatthehealthoftheuserorotherpersons maybeendangered.
Information
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Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies, Limited in the United States and other countries. Data subject to change. Copyright (c) 007 Avago Technologies Limited. All rights reserved. AV01-0740EN - September 1, 007

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