1 electronic com p onents march 3, 2004 gtd-28643 rev. 2.0 KGL4126HA preliminary 11.3 gbps mach-zehnder modulator driver ic 1/5 features ? high output voltage: maximum amplitude > 5.7 vpp ? x-point control function ? output amplitude control function ? small package : 7mm x 7mm qfp function diagram absolute maximum ratings parameter symbol min max unit note supply voltage vs -6.5 0.3 v x-point control voltage vb1 vs-4.5 (min. -6.5) vs+2.0 (max. 0.3) v current source fet gate bias voltage vc1 -6.5 vs+1.2 (max. 0.3) v dc bias for output stage amplifier vd 0 5.0 v operating temperature at package base ts -10 100 c storage temperature tst -40 125 c recommended operating conditions parameter symbol min typ max unit supply voltage vs -5.46 -4.94 v dc bias for output stage amplifier *1,2 vd 2.0 4.0 v x-point control voltage vb1 vs+1.1 vs+1.5 v current source fet gate bias voltage *1,3 vc1 vs vs+0.85 vs+1.0 v 0.25 1 vpp input amplitude : differential : single ? ended vin 0.5 1 vpp operating temperature at package base ts 0 70 c input interface ac coupled (external blocking capacitor is required) output interface ac coupled (external bias-t is required for vd) *1 output amplitude can be tuned by control voltage vd . *2 vd is supplied at output port using external bias-t. *3 it is recommended to set vc1 to a fixed value between vs+0.7v and vs+1.0v. out in vb1 vb2 vs vc1 inb
gtd-28643 rev. 2.0 1 1 1 1 electronic components KGL4126HA 2/5 electrical characteristics parameter symbol condition min typ max unit input data rate nrz 11.3 gbps supply current of vs iss x-point : 45% - 55% 210 250 ma supply current of vd i d supply dc bias by bias-t 90 130 ma power dissipation pw maximum amplitude 1.5 w output amplitude (max) vo (max) 50 ? load,(ac coupled) 5.7 6.0 vpp x-point control xp nrz, 50 ? load 45 55 % output rise/fall time tr/tf 50 ? load 20%-80% 40 ps input return loss s11 100khz?10 ghz 13 db package dimensions pin assignment note) this package is non-hermetic. no. symbol note 1 gnd ground 2 gnd ground 3 gnd ground 4 gnd ground 5 gnd ground 6 gnd ground 7 gnd ground 8 gnd ground 9 gnd ground 10 gnd ground 11 gnd ground 12 gnd ground 13 out signal output port 14 gnd ground 15 gnd ground 16 gnd ground 17 gnd ground 18 gnd ground 19 vc1 output amplitude control port 20 vs supply voltage port 21 vs supply voltage port 22 vb2 input termination port 23 vb1 x-point control port and inverted input termination port 24 gnd ground 25 gnd ground 26 gnd ground 27 gnd ground 28 inb inverted input port 29 gnd ground 30 gnd ground 31 in signal input port 32 gnd ground (top view) lot no. inde x 4.445 28-0.635 7.00.2 7.00.2 24 17 1.50.25 1 8 k4126 ha 32-0.2 16 9 25 32 0.750.2 1.120.2 0.4 0.125 0.62 unit : mm
gtd-28643 rev. 2.0 1 1 1 1 electronic components KGL4126HA 3/5 typical application supply voltage of vd d ata in put in vb1 vs vc1 out gnd chip capacitor 0.1 supply voltage of vs output amplitude control vb2 KGL4126HA chip capacitor 0. 1 blocking capacitor ex . 0 . 1 inb inverted data in p ut x-point control chip capacitor 0.1 mz mod. bias-t 50 ?
gtd-28643 rev. 2.0 1 1 1 1 electronic components KGL4126HA 4/5 application note 1. external blocking capacitors are required for the data inputs (in/inb). termination capacitors are required between the control voltages (vb1/vb2) and ground. 2. to minimize the dependence of the ?x-point? on the supply voltage vs a. vb2 is open vb2 is biased at about 0.76 x vs (-3.8v@vs=-5.2v) by the internal circuit. control vb1, so that the voltage difference ?vb1?vb2? is constant. b. vb2 is biased bias vb2 at about ?3.8v by using the external voltage source independent of vs. control vb1 by using the external voltage source independent of vs. 3. to minimize the dependence of ?output amplitude? on the supply voltage vs a. it is recommended to set ?vc1? to a fixed value between vs+0.7v and vs+1.0v. control the voltage of ?vc1?, so that the voltage difference ?vc1?vs? is constant. b. the output amplitude can be tuned by adjusting vd; vd is supplied at the output port using an external bias-t. 4. power-up/shut-down sequence a. for manual power-up, turn on supply control voltages (vb1, vb2, vc1) at first, next vs, then vd. for shutdown, turn off vd first, then vs, then control voltages. the sequence for the control voltages (vb1, vb2, vc1) is not critical. b. for simultaneous start up it is recommended that the delay between the supply control voltages (vb1, vb2, vc1) and vs be minimized, or that all voltages be applied at the same time.
gtd-28643 rev. 2.0 1 1 1 1 electronic components KGL4126HA 5/5 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. 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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