1 sy100el1003 micrel, inc. m9999-031306 hbwhelp@micrel.com or (408) 955-1690 description up to 1.25gbps operation 75ma peak drive current separate modulation control separate output enable for laser safety differential inputs for data 75k ? input pulldown resistor single power supply available in 16-pin soic package the sy100el1003 is a high speed current source for driving a semiconductor laser diode in optical transmission applications. the output current modulation is dc voltage controlled. the modulation current is disabled when output enable is high. the device incorporates complementary open collector outputs with a capability of driving peak current of 75ma. the laser driver current is adjustable by selection of r set . the resistor r ext must be placed between out and v cc to dissipate the worst case power. r ser is recommended to fix laser diode matching issues. the sy100el1003 utilizes the high performance bipolar asset technology. features laser diode driver with output enable sy100el1003 block diagram d en v cc r ext out out v bb r set v ee r ser to laser diode mc modulation control d internal logic bias control r set 1 rev.: h amendment: /0 issue date: march 2006
2 sy100el1003 micrel, inc. m9999-031306 hbwhelp@micrel.com or (408) 955-1690 package/ordering information ordering information (1) package operating package lead part number type range marking finish sy100el1003zc z16-2 commercial sy100el1003zc sn-pb sy100el1003zctr (2) z16-2 commercial sy100el1003zc sn-pb sy100el1003zi z16-2 industrial sy100el1003zi sn-pb sy100el1003zitr (2) z16-2 industrial sy100el1003zi sn-pb sy100el1003zg (3) z16-2 industrial sy100el1003zg with pb-free pb-free bar-line indicator nipdau SY100EL1003ZGTR (2, 3) z16-2 industrial sy100el1003zg with pb-free pb-free bar-line indicator nipdau notes: 1. contact factory for die availability. dice are guaranteed at t a = 25 c, dc electricals only. 2. tape and reel. 3. pb-free package is recommended for new designs. 16-pin narrow soic (z16-2) n c 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 en n/c r set v cco d d nc v cc nc mc out out v bb nc v ee top view soic z16-2
3 sy100el1003 micrel, inc. m9999-031306 hbwhelp@micrel.com or (408) 955-1690 d d en out out lhlhl hlllh xxhhl note: 1. l = low, h = high, x = don't care pin function v cc , v cco separate positive power supply pins help to isolate sensitive circuitry from noise generating function. +5v for pecl operation or ground for ecl operation. v ee most negative power supply input. ground for pecl operation or -5v for ecl operation. v bb this pin provides a reference voltage for use in single ended applications or when the input signal is ac coupled into the device. d,d these differential ecl/pecl 100k compatible inputs receive nrz data. en this ecl/pecl 100k compatible input enables laser driver - modulation current transitions to zero when asserted high. out, out open collector outputs from the modulation buffer drive these differential current outputs. mc an external voltage sets the main value of modulation current i o . r set an external resistor sets the source current for modulation i mod . nc these pins are not connected. symbol rating value unit v ee power supply voltage (v cc = 0v) 0 to -7.0 v v in input voltage (v cc = 0v) 0 to -6.0 v i out output current 75 ma t lead lead temperatre (soldering, 20sec.) +260 c t a operating temperature range 40 to +85 c p tot power dissipation 500 mw note: 1. permanent device damage may occur if absolute maximum ratings are exceeded. this is a stress rating only and functional oper ation is not implied at conditions other than those detailed in the operational sections of this data sheet. exposure to absolute maximum ratlng condi tions for extended periods may affect device reliability. absolute maximum ratings (1) pin names truth table (1) symbol rating value unit v ee power supply voltage 4.75 to -5.25 v r set resistor to adjust current 10 to 100 ? r ext resistor to dissipate power 10 to 50 ? r ser laser diode serial resistor 0 to 50 ? operationing conditions (1) note: 1. the voltage drop across r ext and r ser should not be greater than 2v.
4 sy100el1003 micrel, inc. m9999-031306 hbwhelp@micrel.com or (408) 955-1690 t a = ?0 ct a = 0 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. min. typ. max. unit t pd d propagation delay 1000 1000 1000 1000 ps d - out t pd en propogation delay 1000 1000 1000 1000 ps en - out t r rise/fall time 400 400 400 400 ps t f (20% to 80%) dc electrical characteristics (1) v cc = v cco = 0v; v ee = -5.0v 5% v imod = 1.5v; v cc = v cco = 0v; v ee = 5v 5% notes: 1. r set = 10 ? 1% 2. v i = v il (min.) 3. v imod = v cc 4. v imod = -3.5v 5. v lmod = -0.8v 6. i oh = 5 to 60ma ac electrical characteristics (1) t a = ?0 ct a = 0 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. min. typ. max. unit v ih input high voltage -1165 -880 -1165 -880 -1165 -880 -1165 -880 mv (d, en) v il input low voltage -1810 -1475 -1810 -1475 -1810 -1475 -1810 -1475 mv (d, en) v imod input voltage v ee v cc v ee v cc v ee v cc v ee v cc v (modulation control) v bb output reference -1380 -1260 -1380 -1260 -1380 -1260 -1380 -1260 mv voltage i ih input high current 150 150 150 150 a (d, en) i imod input current 150 150 150 150 a (modulation control) i il input low current (2) 0.5 0.5 0.5 0.5 a (d, en) i cc supply current (3) 8 14 25 8 14 25 8 14 25 8 14 25 ma i oh output high current (4) 60 64 68 60 64 68 60 64 68 60 64 68 ma (en low) (5) 5 5 5 5 i ol output low current 500 500 500 500 a (en high) i or output current ringing (6) 10 10 10 10 % i omod laser diode modulation 5 60 5 60 5 60 5 60 ma current range note: 1. r set = 10 ? 1%, r ext = r ser = 50 ? 1%
5 sy100el1003 micrel, inc. m9999-031306 hbwhelp@micrel.com or (408) 955-1690 performance curves 20 30 40 50 60 70 i o (ma) i o vs. t a and v mod 10 2.0 3.0 4.0 5.0 0 1.0 0 t a = 0 ? c t a = 25 ? c t a = 70 ? c -v mod (v)
6 sy100el1003 micrel, inc. m9999-031306 hbwhelp@micrel.com or (408) 955-1690 application example notes: 1. split 100k ecl terminations are 82 ? and 130 ? to v cc and v ee respectively. 2. recommended power supply bypass capacitors are 0.1 f with optional 10 f tantalum in parallel. 3. it is required to use high frequency design techniques for board layout. a double sided or multilayer board is recommended i n conjunction with a low impedance ground plane and properly terminated transmission lines for all signal paths. 4. v bb voltage pin may be used as reference for single ended input applications. v cc r set v ee v cco d 50 ? coax 50 ? coax r ext r set sy100el1003 v ee v ee out r ser v ee laser module inputs 50 ? coax laser bias / apc control 470k ? 0.1f 0.1f 1k ? 1k ? 0.1f 10k ? 1k ? b 750 ? 47k ? 47k ? 4.7k ? 47k ? 10k a d en out 0.02f v ee v cc v cc v cc ic 1 = ic 2 = lm324 v ee = 5.0v v cc = 0v ic 2 + ic 1 + 0.1h v cc v cc v cc 0.1f 130 ? 82 ? mc v cc v ee 10k 10 ? 24 ?
7 sy100el1003 micrel, inc. m9999-031306 hbwhelp@micrel.com or (408) 955-1690 16-pin soic .150" wide (z16-2) rev. 02 micrel, inc. 2180 fortune drive san jose, ca 95131 usa tel + 1 (408) 944-0800 fax + 1 (408) 474-1000 web http://www.micrel.com the information furnished by micrel in this datasheet is believed to be accurate and reliable. however, no responsibility is as sumed by micrel for its use. micrel reserves the right to change circuitry and specifications at any time without notification to the customer. micrel products are not designed or authorized for use as components in life support appliances, devices or systems where malfu nction of a product can reasonably be expected to result in personal injury. life support devices or systems are devices or systems that (a) are intend ed for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant inj ury to the user. a purchaser s use or sale of micrel products for use in life support appliances, devices or systems is at purchaser s own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2006 micrel, incorporated.
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