electronic com p onents odhKGL4175JW-02 issue date:oct 20, 2004 KGL4175JW 10.7 gbps direct modulatin laser driver ic 1 features ? low power : 0.6 w (excluding modulation current and bias current) ? high sensitive input : 0.25 vpp (differential) ? modulation current control : 20 mapp to 50 mapp ? bias current control : 0 ma to 45 ma ? x-point controllability : 40 % to 60 % ? surface mount type pkg applications ? sonet oc-192 and sdh stm-64 transmission systems up to 10.7gbps ? 10gbe systems ? optical transmitters/transceivers/transponders general description the KGL4175JW is a high performance direct modulated laser diode driver for 10gbe and sonet/sdh applications up to 10.7gb/s. the device provides typically 20-50mapp single-ended modulation current, 0-45ma bias current, and duty cycle (x-point) control. the KGL4175JW data input accepts single ended or differential ac-coupled signals. the modulation current can be tuned by varying vc1. the bias current can be tuned by varying vc2. the KGL4175JW is capable of adjusting the crossing point (x-point) from 40% to 60% of the output eye diagram via the differential voltage between vb1 and vb2 the KGL4175JW is packaged in a small 26-pin qfp package : 5x5.2mm function diagram in inb out crossing point control vd1 vb1 vb2 vc1 vc2 bias 150 ? 50 ? 50 ?
odhKGL4175JW-02 electronic components KGL4175JW 2 absolute maximum ratings parameter symbol min max unit note supply voltage vd1 -0.3 4 v voltage of modulation current output v(out) -0.3 6 v voltage of bias current output v(bias) -0.3 6 v x-point control voltage vb1 -1 +2.5 v x-point reference voltage vb2 -1 +2.5 v modulation current control voltage vc1 -1 +1.6 v bias current control voltage vc2 -1 +2.6 v input amplitude vin - 1.6 vpp ac coupled operating temperature at package base ts -10 100 c storage temperature tst -40 125 c recommended operating conditions parameter symbol min typ max unit note supply voltage vd1 3.13 3.3 3.47 v low voltage of modulation current output vl(out) 1.4 - - v low voltage of bias current output vl(bias) 1.9 - - v x-point control voltage vb1 0.6 1.2 1.8 v x-point reference voltage vb2 1) 1.2 v output amplitude control voltage vc1 0 - 1.2 v output bias control voltage vc2 0 - 2.4 v single-ended input amplitude 0.5 - 1.2 vpp ac coupled differential input amplitude vin 0.25 - 1.2 vpp ac coupled operating temperature at package base ts 0 - 85 c input interface ac coupled (external blocking capacitor is required) output interface dc coupled( pull up through ld ) 1) vb2 can be open or biased by the external circuit. for vb2 opened, vb2 is biased at about 1.2v ( vd1=3.3v ).
odhKGL4175JW-02 electronic components KGL4175JW 3 electrical characteristics typical values are at vd=-5.2v, ts=25c. parameter symbol condition min typ max unit maximum operating data rate nrz 10.7 - - gbps supply current id1 - 150 180 ma minimum modulation current imod (min) 50 ? load - 20 25 mapp maximum modulation current imod (max) 50 ? load 45 50 - mapp minimum bias current ibias (min) 50 ? load - 0 0.5 ma maximum bias current ibias (max) 50 ? load 40 45 - ma high xph 57 60 % x-point control range low xpl 50 ? load, nrz - 40 43 % x-point stability del (xp) 50 ? load, 0?85c -10 - 10 % output rise/fall time tr/tf 50 ? load, 20%/80% - 25 37 ps input return loss s11 100khz?10 ghz - 12 - db ac characteristics test circuit in out gnd blocking capacitor 0.1 f power suppl y (vd1) vb1 KGL4175JW inb vb2 vd1 vc1 vc2 +3.8 v bias 0.1 f bias-t 50 ? oscillo -scope pulse pattern generator fc=7.5ghz bessel filter power suppl y (vb1) power suppl y (vc1) power suppl y (vc2) +3.8v i bias 0.1 f 0.1 f 0.1 f 50 ? transmission line 50 ? transmission line
odhKGL4175JW-02 electronic components KGL4175JW 4 package dimensions note. this package is non-hermetic. ( top view ) ( unit : mm ) 0.15 0.85 1.250.2 5.00.2 3.90 12 - 0.65 14 - 0.30 9 - 0.65 11 - 0.20 0.70 0.30 5.20.2 3.25 4.8 4.6 index pin 5.80.25 6.00.25 1 7 8 13 14 20 21 26 k4175 jw (lot no) 4.10 2.91 sq. 3.60 (0.55) (0.55) (0.55) (0.55) (0.15) (0.2) (0.2) (0.2) index pin 1 7 8 13 14 20 21 26 ( side view ) ( bottom view ) pin connection no. symbol note 1 gnd ground 2 gnd ground 3 gnd ground 4 gnd ground 5 gnd ground 6 ibias bias current output port 7 gnd ground 8 gnd ground 9 imod modulation current output port 10 gnd ground 11 gnd ground 12 gnd ground 13 gnd ground 14 gnd ground 15 vc2 bias current control port 16 vc1 modulation current control port 17 vd1 supply voltage port 18 vb2 x-point reference port 19 vb1 x-point control port 20 gnd ground 21 gnd ground 22 inb inverted input port 23 gnd ground 24 gnd ground 25 in signal input port 26 gnd ground
odhKGL4175JW-02 electronic components KGL4175JW 5 typical operating characteristics measured condition input signal 10.7bps, nrz, pn31, differential 0.5vpp ( 0.25vpp each ), ac coupled tr/tf(20-80%) ? 36ps ( through 7.5ghz bessel filters ) waveforms @10.7gbps operate 0 10 20 30 40 50 60 0.0 0.2 0.4 0.6 0.8 1.0 1.2 modulation current control voltage vc1 (v) modulation current (mapp ) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 current of control port ic1 (ma ) 80 100 120 140 160 10 20 30 40 50 60 modulation current (mapp) supply current of vd1 (ma ) 20 30 40 50 60 70 80 0.6 0.8 1.0 1.2 1.4 1.6 1.8 crossing control voltage vb1 (v) output crossing (%) -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 current of control port ib1 (ma ) 0 10 20 30 40 50 60 0.0 0.5 1.0 1.5 2.0 2.5 bias current control voltage vc2 (v) bias current (ma) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 current of control port ic2 (ma ) amplitude : 0.823vpp (16.5mapp) tr / tf (20?80%) : 17.3ps / 17.8ps jitter (p-p) : 11.2ps v:600mv/div ( offset=0v ), h:20 p s/div v:600mv/div ( offset=0v ), h:20 p s/div amplitude : 2.608vpp (52.1mapp) tr / tf (20?80%) : 21.8ps / 25.2ps jitter (p-p) : 11.3ps
odhKGL4175JW-02 electronic components KGL4175JW 6 typical application typical pcb layout and assembling information please request us the application note named gtd18810. output bias control d ata in put in out gnd blocking capacitor ex . 0. 1 0.1 supply voltage output a m p litude x-point reference vb1 KGL4175JW ld module x-point control data- b ar in p ut inb vb2 vd1 vc1 vc2 p u ll up bias choke coil chip capacitor 0.1
odhKGL4175JW-02 electronic components KGL4175JW 7 application note 1. for stable operation; 1. for stable operation; to prevent a dependence of ?x-point? on the supply voltage vd1, case 1 : vb2 is open vb2 is biased at about 0.364 x vd1 (1.2v@vd1=3.3v) by the internal circuit. control vb1, so that the voltage difference ?vb1?vb2? is constant. case 2 : vb2 is biased bias vb2 at about 1.2v by using the external voltage source independent of vd1. control vb1 by using the external voltage source independent of vd1. 2. power-up/shut-down sequence; for power-up, supply voltage vd1 at first, then control voltages ( vb1, (vb2), vc1, vc2 ). for shut-down, control voltages( vb1, (vb2), vc1, vc2 ). at first, , then vd1. customer does not need to care about the sequence for the control voltages (vb1,(vb2),vc1,vc2). safety and handling information on gaas devices arsenic compound (gaas devices) the product contains arsenic (as) as a compound. this material is stable for normal use; however, its dust or vapor may be potentially hazardous to the human body. avoid ingestion, fracture, burning or chemical treatment to the product. ? do not put the product in your mouth. ? do not burn or destroy the product. ? do not perform chemical treatment for the product. keep laws and ordinances related to the disposal of the products. esd considerations: this device can be damaged by esd; therefore appropriate precautions must be taken to avoid exposure to esd and eos during handling, assembly, and testing of these devices. failure to adhere to proper esd/eos precautions during handling and assembly of these devices can damage or adversely affect device reliability.
odhKGL4175JW-02 electronic components KGL4175JW 8 notice 1. the information contained herein can change without notice owing to product and/or technical improvements. before using the product, please make sure that the information being referred to is up-to-date. 2. the outline of action and examples for application circuits described herein have been chosen as an explanation for the standard action and performance of the product. when planning to use the product, please ensure that the external conditions are reflected in the actual circuit, assembly, and program designs. 3. when designing your product, please use our product below the specified maximum ratings and within the specified operating ranges including, but not limited to, operating voltage, power dissipation, and operating temperature. 4. oki assumes no responsibility or liability whatsoever for any failure or unusual or unexpected operation resulting from misuse, neglect, improper installation, repair, alteration or accident, improper handling, or unusual physical or electrical stress including, but not limited to, exposure to parameters beyond the specified maximum ratings or operation outside the specified operating range. 5. neither indemnity against nor license of a third party?s industrial and intellectual property right, etc. is granted by us in connection with the use of the product and/or the information and drawings contained herein. no responsibility is assumed by us for any infringement of a third party?s right which may result from the use thereof. 6. the products listed in this document are intended for use in general electronics equipment for commercial applications (e.g., office automation, communication equipment, measurement equipment, consumer electronics, etc.). these products are not authorized for use in any system or application that requires special or enhanced quality and reliability characteristics nor in any system or application where the failure of such system or application may result in the loss or damage of property, or death or injury to humans. such applications include, but are not limited to, traffic and automotive equipment, safety devices, aerospace equipment, nuclear power control, medical equipment, and life-support systems. 7. certain products in this document may need government approval before they can be exported to particular countries. the purchaser assumes the responsibility of determining the legality of export of these products and will take appropriate and necessary steps at their own expense for these. 8. no part of the contents contained herein may be reprinted or reproduced without our prior permission. copyright 2004 oki electric industry co., ltd.
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