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general description the MAX9483/max9484 high-performance, multimode, laser-diode drivers (ldds) are designed for cd and dvd combination pickup heads. the drivers consist of three input channels, an rf oscillator, and two preci- sion current-amplifier outputs to drive the cd and dvd laser diodes. the MAX9483/max9484 support multiple cd and dvd read/write standards, such as cd-r/rw, dvd-r, dvd+r, dvd-rw, dvd+rw, and dvd-ram by choosing the writing control signals and input currents on these input channels. the peak total output current is 400ma with a current gain of 100 at each channel. external resistors set the oscillation frequency and out- put swing. the max9484 features an extra resistor input allowing the oscillation frequencies of the two out- puts to be set separately. additionally, the max9484 allows the writing control signals to be received in low- voltage differential signal (lvds) mode or single-ended mode to provide reliable high-speed writing. the MAX9483 is offered in 16-pin qsop and 4mm x 4mm 16-pin thin qfn packages. the max9484 is offered in a 4mm x 4mm 20-pin thin qfn package. both devices are specified for 4.5v to 5.5v supply and 0c to +70? tem- perature range. applications laser diode driver for cd-rw and dvd combos: cd-r/rw, dvd-r, dvd+r, dvd-rw, dvd+rw, dvd-ram dvd video recorders high-power and high-speed laser-writable device drivers features ? dual output ports with three controlled-current channels ? support various laser-diode driver standards cd-r/rw, dvd-r, dvd+r, dvd-rw, dvd+rw, dvd-ram, and dvd video ? MAX9483 is pin and function compatible with atmel t0806 ? independent frequency setting for the two output ports (max9484) ? accepts differential (lvds) or single-ended inputs for writing data (max9484) ? enable control ? high-current swing up to 270ma for the reading current ? high 400ma total peak writing current ? adjustable modulation frequency from 100mhz to 600mhz ? fast output-current pulse rise and fall time 1.0ns (typ) ? 4.5v to 5.5v single-supply voltage ? no external reference clock required ? 0? to +70? commercial temperature range MAX9483/max9484 dual-output, multimode cd-rw/dvd laser-diode drivers ________________________________________________________________ maxim integrated products 1 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 in1 v cc out1 gnd r s1 r s2 out2 outsel v cc top view MAX9483 qsop in2 in3 ne3 r f ne2 enable enosc pin configurations ordering information 19-3265; rev 0; 5/04 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. pin configurations continued at end of data sheet. part temp range pin-package MAX9483 cee 0? to +70? 16 qsop MAX9483cte* 0? to +70? 16 thin qfn max9484 ctp 0? to +70? 20 thin qfn * future product?ontact factory for availability.
MAX9483/max9484 dual-output, multimode cd-rw/dvd laser-diode drivers 2 _______________________________________________________________________________________ absolute maximum ratings dc electrical characteristics (v cc = v cco_ = +4.5v to +5.5v, r l = 6.8 ? , enable = high, ne2 = ne3 = high (MAX9483), ne2_ = ne3_ = differential high (max9484), enosc = low, t a = 0? to +70?, unless otherwise noted. typical values are at v cc = v cco_ = +5v, t a = +25?.) (notes 1, 2, 4) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. v cc , v cco_ to gnd ..............................................-0.3v to +6.0v in_, r f_ , r s_ to gnd..................................-0.3v to (v cc + 0.3v) enable, enosc, ne2_, ne3_, outsel to gnd.....................................-0.3v to (v cc + 0.3v) output voltage at out1, out2......................-0.3v to (v cc - 1v) continuous power dissipation (t a = +70?) qsop (derate 8.3mw/? above +70?) ........................667mw tqfn (derate 16.9mw/c above +70?) .....................1349mw junction temperature ......................................................+150? storage temperature range .............................-65? to +150? esd rating (human body model) ................................. ?.0kv lead temperature (soldering, 10s) .................................+300? parameter symbol conditions min typ max units power supply MAX9483 181 200 write-mode supply current i cc1 i in1 = i in2 = i in3 = 500?, ne2 = ne3 = low max9484 182 210 ma MAX9483 91 100 oscillator enabled, i in1 = i in2 = i in3 = 500?, enosc = high, r s = 8.2k ? , r f = 6.8k ? max9484 92 105 MAX9483 82 95 read-mode supply current i cc2 oscillator disabled, i in1 = i in2 = i in3 = 500? max9484 83 95 ma MAX9483 14 20 supply current i cc3 input disabled, i in1 = i in2 = i in3 = 0 max9484 14 20 ma MAX9483 0.96 2.0 power-down supply current i cc4 enable = ne2 = ne3 = low, i in1 = i in2 = i in3 = 0 max9484 1.2 2.0 ma digital inputs for write channel control (ne2, ne3) (MAX9483) high-level input voltage v ih1 2.0 v low-level input voltage v il1 0.8 v input current i in1 v in = high or low -20 +20 ? lvds digital inputs for write channel control (ne2_, ne3_) (max9484) differential input high threshold v th 50 mv differential input low threshold v tl -50 mv single-ended digital inputs for write channel control (ne2+, ne3+) (max9484) reference voltage v ref 1.10 1.25 1.40 v high-level input voltage v ih2 v ref + 300 mv low-level input voltage v il2 v ref - 300 mv input current i in2 v in = high or low -20 +20 ?
MAX9483/max9484 dual-output, multimode cd-rw/dvd laser-diode drivers _______________________________________________________________________________________ 3 dc electrical characteristics (continued) (v cc = v cco_ = +4.5v to +5.5v, r l = 6.8 ? , enable = high, ne2 = ne3 = high (MAX9483), ne2_ = ne3_ = differential high (max9484), enosc = low, t a = 0? to +70?, unless otherwise noted. typical values are at v cc = v cco_ = +5v, t a = +25?.) (notes 1, 2, 4) parameter symbol conditions min typ max units digital inputs for control signals (enable, outsel, enosc) high-level input voltage v ih3 2.0 v low-level input voltage v il3 0.8 v input current i in3 v in = high or low -10 +10 ? analog inputs (in1, in2, in3) current channel input current range i cin current flowing into in1, in2, or in3 0 4.0 ma current channel input impedance r in in_ to gnd 165 200 235 ? outputs (out1 and out2) maximum total output current i out 320 400 ma read current in1 210 273 maximum output current per channel i out write current in2, in3 250 347 ma best-fit current gain a i any channel (note 3) 100 i/i best-fit current offset i offset any channel (note 3) -4 +4 ma output current linearity any channel (note 3) -3 +3 % i off1 enable = low 0.2 1 i off2 ne2 = ne3 = high, i in1 = 0?, i in2 = i in3 = 500? 0.22 1.5 output off current i off3 ne2 = ne3 = low, i in1 = i in2 = i in3 = 0? 0.14 5 ma read-mode output supply sensitivity i out = 40ma -2 +2 %/v write-mode output supply sensitivity i out = 80ma -2 +2 %/v read-mode output temperature sensitivity i out = 40ma 15 ppm? write-mode output temperature sensitivity i out = 80ma 16 ppm? output noise i out = 40ma, enosc = low 3 na/ hz
MAX9483/max9484 dual-output, multimode cd-rw/dvd laser-diode drivers 4 _______________________________________________________________________________________ note 1: current into a pin is defined as positive. current out of a pin is defined as negative. all voltages are referenced to ground except v th . note 2: maximum and minimum limits over temperature are guaranteed by design and characterization. devices are production tested at t a = +25?. note 3: linearity of the amplifier is calculated using a best-fit method at three operating points of i out at 20ma, 40ma, and 60ma. i out = (i in x gain) + i offset . note 4: guaranteed by design and characterization. limit set at ? sigma. ac electrical characteristics (v cc = v cco_ = +4.5v to +5.5v, i out = 40ma (read) + 40ma, r l = 6.8 ? , enable = high, ne2 = ne3 = high (MAX9483), ne2_ = ne3_ = differential high (max9484), enosc = low, t a = 0? to +70?, unless otherwise noted. typical values are at v cc = v cco_ = +5v, t a = +25?.) (notes 1, 4) parameter symbol conditions min typ max units oscillator oscillator frequency f osc r f_ = 7.5k ? (note 2), i out = 40ma (read) 255 300 350 mhz oscillator temperature coefficient r f_ = 7.5k ? 10 ppm/? output timing write rise time t r i out = 40ma (read) + 40ma (10% to 90%) 0.9 1.6 ns write fall time t f i out = 40ma (read) + 40ma (90% to 10%) 1.0 1.6 ns output-current overshoot oco 5 % output on propagation delay t on ne 50% high-low to iout at 50% of final value 1.0 2.0 ns output off propagation delay t off ne 50% low-high to iout at 50% of final value 1.0 2.0 ns output disable time t dis enable 50% high-low to i out at 50% of final value at i out = 40ma (read) 60 100 ns output enable time t en enable 50% low-high to i out at 50% of final value at i out = 40ma (read) 60 100 ns oscillator disable time t diso enosc 50% high-low to i out at 50% of final value at i out = 40ma (read) 410ns oscillator enable time t eho enosc 50% high-low to i out at 50% of final value at i out = 40ma (read) 25 50 ns t odh outsel 50% low-high to i out at 50% of final value measured at out1 2.9 10 channel-select delay t odl outsel 50% high-low to i out at 50% of final value measured at out2 2.9 10 ns
MAX9483/max9484 dual-output, multimode cd-rw/dvd laser-diode drivers _______________________________________________________________________________________ 5 100 200 300 400 500 600 700 35 46 78910 11 12 oscillator frequency vs. resistor r f MAX9483 toc01 r f (k ? ) frequency (mhz) 0 20 10 40 30 70 60 50 80 35 4 678910 oscillator peak-to-peak swing vs. resistor r s MAX9483 toc02 r s (k ? ) swing (ma p-p ) 0 20 10 40 30 60 50 70 90 80 100 200 300 350 250 400 450 500 550 600 oscillator peak-to-peak swing vs. frequency MAX9483 toc03 frequency (mhz) swing (ma p-p ) 280 290 285 300 295 315 310 305 320 020 10 30 40 50 60 70 oscillator frequency vs. temperature MAX9483 toc04 temperature ( c) frequency (mhz) 0 100 50 250 200 150 400 350 300 450 0600 300 900 1200 1500 output channel current vs. input current (i in1 = i in2 = i in3 ) MAX9483 toc05 i in_ ( a) i out (ma) v cc = 5.25v v cc = 5.0v v cc = 4.75v 0 100 50 200 150 300 250 350 02 1345 output voltage compliance MAX9483 toc06 v cc - v out (v) i out (ma) 50ma +50ma pulse (10ns) MAX9483 toc07 time (5ns/div) t ypical operating characteristics (v cc = v cco_ = +5v, t a = +25?, unless otherwise noted.)
MAX9483/max9484 dual-output, multimode cd-rw/dvd laser-diode drivers 6 _______________________________________________________________________________________ pin description pin MAX9483 max9484 qsop tqfn tqfn name function 11 51 8 in1 channel 1 input current (read channel) 21 61 9 in2 channel 2 input current (write channel) 31 20 in3 channel 3 input current (write channel) 42 r f oscillator frequency-setting resistor. connect an external resistor to gnd to set the frequency of the oscillator for both outputs out1 and out2. 53 ne2 channel 2 active-low digital control input 64 ne3 channel 3 active-low digital control input 75 8 enable lvttl output-current enable 86 9 enosc lvttl oscillator enable 9, 16 14 17 v cc +5v power supply. bypass to gnd with 0.1? and 0.01? capacitors with the 0.01? capacitor as close to the pin as possible. 10 8 11 outsel lvttl output select. drive high to select output 1; pull low to select output 2. 11 9 12 out2 output current 2 12 10 13 r s2 output 2 oscillator current swing-setting resistor. connect an external resistor to gnd to set the swing current of output port 2. 13 11 14 r s1 output 1 oscillator current swing-setting resistor. connect an external resistor to gnd to set the swing current of output port 1. 14 gnd ground 15 12 15 out1 output current 1 1 r f1 output 1 oscillator frequency-setting resistor. connect an external resistor to gnd to set the frequency of the oscillator for out1. 2 r f2 output 2 oscillator frequency-setting resistor. connect an external resistor to gnd to set the frequency of the oscillator for out2. 3 ne2+ noninverting channel 2 lvds or single-ended digital control input 4 ne2- inverting channel 2 lvds or reference for single-ended digital control input 6 ne3+ noninverting channel 3 lvds or single-ended control digital input 7 ne3- inverting channel 3 lvds or reference for single-ended control digital input ? 10 v cco2 +5v power supply for output 2. bypass to gnd with 0.1? and 0.01? capacitors with the 0.01? capacitor as close to pin as possible. ?3 16 v cco1 +5v power supply for output 2. bypass to gnd with 0.1? and 0.01? capacitors with the 0.01? capacitor as close to the pin as possible. 5 ref reference voltage for single-ended input. connect a 0.1? decoupling capacitor to ground. ? pe pe p exposed pad. connect to ground.
MAX9483/max9484 dual-output, multimode cd-rw/dvd laser-diode drivers _______________________________________________________________________________________ 7 enable ne2 ne3 t en t on t on t off t off t dis t r t r t f t f i out h l h l h l time figure 1. timing diagram of output vs. control signals detailed description read channel and write channels the MAX9483/max9484 high-performance multimode ldds are designed for cd and dvd combination pick- up heads. the drivers have three current channels. each channel has a current input in_ (_ = 1, 2, or 3) and a channel control signal (enable, ne2, or ne3). in1 supplies the reference for the read channel, which provides the read current or the offset current to the lasers. the other two channels are the write channels. the currents of these two channels are superimposed on the read current that serves as the offset current for the laser in write mode. the offset current significantly reduces the laser output ramp-up time. when enable is low, all three channels are disabled. driving enable high enables the read channel and leaves the other two write channels to be controlled by ne2 and ne3 (see figure 1). by selecting the input currents at in2 and in3, as well as the signal timing of ne2 and ne3, the drivers can generate various current waveforms for dif- ferent cd/dvd writing standards. all three channels have a current gain of 100. the maximum total current each output can provide is 400ma. rf oscillator to reduce the laser-mode hopping noise in read mode, modulate the read current with an oscillator with a 100mhz to 600mhz frequency. an external resistor, rf, determines the oscillator frequency selection. for the max9484, two external resistors, r f1 and r f2 , are used to select the oscillator frequency for cd and dvd lasers separately. the swing amplitude of the oscillator current is set by two external resistors, r s1 and r s2 , one for cd and one for dvd. the oscillator is enabled when both enable and enosc are driven high.
applications information lvds inputs for max9484 the max9484 input control signals, ne2_ and ne3_, are compatible with lvds or single-ended inputs. the lvds inputs allow the driver to handle higher data writing rates. when using single-ended input signals, such as lvttl or sstl_2, connect ne2- and ne3- to ref. laser safety and iec 825 using the MAX9483/max9484 laser drivers alone does not ensure that a transmitter design is compliant with iec 825. the entire transmitter circuit and component selec- tions must be considered. customers must determine the level of fault tolerance required by their application. note that maxim products are not designed or autho- rized for use as components in systems intended for sur- gical implantation into the body, for applications intended to support or sustain life, or for any other appli- cation where the failure of a maxim product could create a situation where personal injury or death may occur. MAX9483/max9484 dual-output, multimode cd-rw/dvd laser-diode drivers 8 _______________________________________________________________________________________ enable rf oscillator r f r s1 r s2 outsel in3 ne3 in2 ne2 in1 enable enosc out1 out2 control channel 3 control channel 2 read channel MAX9483 enable enable figure 2. MAX9483 functional diagram enable rf oscillator voltage reference r f1 r f2 r s2 outsel in3 in2 ne2+ in1 enable enosc ref out1 out2 control channel 3 control channel 2 read channel max9484 enable enable r s1 ne2- ne3+ ne3- figure 3. max9484 functional diagram
MAX9483/max9484 dual-output, multimode cd-rw/dvd laser-diode drivers _______________________________________________________________________________________ 9 in3 in2 in1 v cc v cc out1 r f out2 r s1 r s1 r s2 r s2 r f single- ended inputs +5v ld1 ne2 ne3 enable enosc outsel control signals and current inputs ld2 output supply +5v core logic supply MAX9483 figure 4. MAX9483 typical operating circuit
MAX9483/max9484 dual-output, multimode cd-rw/dvd laser-diode drivers 10 ______________________________________________________________________________________ in3 in2 in1 v cc v cco1 out1 r s1 r s2 out2 r f1 r f1 r f1 r f2 l vds inputs +5v ld1 ne2+ ne2- ref ne3+ ne3- enable enosc v cco2 +5v output2 supply outsel control signals and current inputs ld2 output1 supply +5v core logic supply 100 ? 100 ? max9484 r s1 r s2 figure 5. max9484 typical operating circuit with lvds inputs
MAX9483/max9484 dual-output, multimode cd-rw/dvd laser-diode drivers ______________________________________________________________________________________ 11 in3 in2 in1 v cc v cco1 out1 r s1 r s2 out2 r f1 r f1 r f2 r f2 r s1 r s2 single- ended inputs +5v ld1 ne2+ ne2- ref ne3+ ne3- enable enosc v cco2 +5v output2 supply outsel control signals and current inputs ld2 output1 supply +5v core logic supply max9484 figure 6. max9484 typical operation circuit with single-ended inputs
MAX9483/max9484 dual-output, multimode cd-rw/dvd laser-diode drivers 12 ______________________________________________________________________________________ 16 15 14 13 9 10 11 12 out2 r s2 r s1 out1 4 3 2 1 ne3 ne2 r f in3 MAX9483 exposed pad (ground) max9484 exposed pad (ground) in2 in1 v cc v cco1 enable enosc v cco2 outsel 5 6 7 8 tqfn 20 19 18 17 12 13 14 15 out2 r s2 r s1 out1 4 3 2 1 ne2- ne2+ r f2 r f1 11 outsel 5 ref in3 in2 in1 v cc ne3+ ne3- enable enosc 16 6 7 8 9 10 v cco1 v cco2 tqfn top view pin configurations (continued) chip information transistor count: 1399
MAX9483/max9484 dual-output, multimode cd-rw/dvd laser-diode drivers ______________________________________________________________________________________ 13 package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) 24l qfn thin.eps c 1 2 21-0139 package outline 12, 16, 20, 24l thin qfn, 4x4x0.8mm
MAX9483/max9484 dual-output, multimode cd-rw/dvd laser-diode drivers 14 ______________________________________________________________________________________ c 2 2 21-0139 package outline 12, 16, 20, 24l thin qfn, 4x4x0.8mm package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .)
MAX9483/max9484 dual-output, multimode cd-rw/dvd laser-diode drivers maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ____________________ 15 2004 maxim integrated products printed usa is a registered trademark of maxim integrated products. package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) qsop.eps e 1 1 21-0055 package outline, qsop .150", .025" lead pitch

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