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general description the MAX9650/max9651 are single- and dual-channel vcom amplifiers with rail-to-rail inputs and outputs. the MAX9650/max9651 can drive up to 1300ma of peak current per channel and operate up to 20v. the MAX9650/max9651 are designed to source and sink a high current quickly to hold the vcom voltage stable in large tft-lcd panels. the MAX9650/max9651 feature 40v/? slew rate and 35mhz bandwidth to quickly settle outputs for 120hz frame rate and full hd television. the MAX9650/max9651 feature output short-circuit protection and thermal shutdown. these devices are available in exposed pad packages for excellent heat dissipation. applications tft-lcd panels instrument control voltage sources features ? 1300ma peak output current ? rail-to-rail inputs and outputs ? operates up to 20v ? 40v/ s slew rate ? 35mhz bandwidth ? 5ma quiescent current per channel ? excellent heat dissipation (exposed pad) MAX9650/max9651 high-current vcom drive op amps for tft lcds ________________________________________________________________ maxim integrated products 1 19-4187; rev 2; 5/09 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. in_+ in_- gnd out_ v dd tft lcd tft-lcd capacitance 16v v ref *r s may be needed for some applications. *r s MAX9650 typical operating circuit ordering information part amps per package pin- package top mark MAX9650 azk+ 1 5 sot23 adsi MAX9650aua+ 1 8 ?ax-ep* aabi MAX9650ata+ 1 8 tdfn-ep* bkx max9651 aua+ 2 8 ?ax-ep* aabh max9651ata+ 2 8 tdfn-ep* bky note: all devices are specified over the -40? to +125? oper- ating range. + denotes a lead-free/rohs-compliant package. * ep = exposed pad.
MAX9650/max9651 high-current vcom drive op amps for tft lcds 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v dd = 19v, v gnd = 0, v cm = v out = v dd /2, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) 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. supply voltage (v dd to gnd) ................................-0.3v to +22v any other pin to gnd ................................-0.3v to (v dd + 0.3v) in_+/in_- (current)............................................................?0ma out_ (current) ......................................................................1.3a continuous power dissipation (t a = +70?) 5-pin sot23 (derate 3.7mw/? above +70?)........297.4mw 8-pin ?ax-ep (derate 12.9mw/? above +70?).......................................................1030.9mw 8-pin tdfn-ep (derate 23.8mw/? above +70?).......................................................1951.2mw operating temperature range .........................-40? to +125? junction temperature ......................................................+150? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? parameter symbol conditions min typ max units supply voltage range v dd guaranteed by psrr 6 20 v quiescent current i dd per channel 3.7 8 ma high output voltage v oh i h = +5ma, v in = v dd v dd - 0.30 v dd - 0.05 v low output voltage v ol i l = -5ma, v in = 0 0.05 0.30 v t a = +25? -14 3.5 +14 input offset voltage v os t a = -40? to +125? -17 +17 v i out = 0 to -80ma +0.2 load regulation lr i out = 0 to +80ma -0.2 mv/ma input bias current i fb at v in = 9.5v 0.01 1 a voltage gain a v a v = 1v/v, r l = 10k ? , c l = 50pf 0.99 1.01 v/v power-supply rejection ratio psrr v dd = 6v to 20v, v cm = v out = 3v 70 95 db common-mode input voltage range cmvr inferred from cmrr test 0.5 v dd - 0.5 v common-mode rejection ratio cmrr 0.5v v cm v dd - 0.5v 60 80 db MAX9650azk+ 20 v out = 9.5v (note 2) MAX9650aua+ 80 continuous output current i o v dd = 15v, v out = 7.5v MAX9650ata+ ?50 ma transient peak output current i pk (note 3) ?.3 a bandwidth bw -3db 35 mhz slew rate sr 4v step, c l = 50pf, r l = 10k ? , a v = +1v/v 40 v/? settling time t s settling to 0.1% of v out , i l = 0 to 1000ma, r s = 2.2 ? , c s = 0.1? (figure 1) 2.0 ?
MAX9650/max9651 high-current vcom drive op amps for tft lcds _______________________________________________________________________________________ 3 electrical characteristics (continued) (v dd = 19v, v gnd = 0, v cm = v out = v dd /2, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) note 1: all devices are 100% production tested at t a = +25?. all temperature limits are guaranteed by design. note 2: continuous output current is tested with one output at a time. note 3: see the thermal shutdown with temperature hysteresis section. note 4: a series resistor can extend load capacitance range. the settling time can be optimized by a small series resistance. see the applications information section for more information. note 5: inputs are protected by back-to-back diodes. parameter symbol conditions min typ max units maximum load capacitance c load (note 4) 150 nf noninverting input resistance r in+ (note 5) 100 m ? inverting input resistance r in- (note 5) 100 m ? input capacitance c in 3pf thermal shutdown +170 ? thermal shutdown hysteresis 15 ? typical operating characteristics (v dd = 19v, gnd = 0, v cm = v out = v dd /2, t a = +25?, unless otherwise specified.) -4 -2 -3 -1 2 3 1 0 4 6 9 12 15 18 21 input offset voltage deviation vs. supply voltage MAX9650 toc01 supply voltage (v) input offset voltage (mv) t a = +125 c t a = +25 c t a = -40 c 0 2 1 4 3 7 6 5 8 -50 0 -25 25 50 75 100 125 input offset voltage deviation vs. temperature MAX9650 toc02 temperature ( c) input offset voltage (mv) 0 1 2 3 4 5 6 7 8 6 9 12 18 15 21 supply current vs. supply voltage MAX9650 toc03 supply voltage (v) supply current (ma) t a = +125 c t a = +25 c t a = -40 c
MAX9650/max9651 high-current vcom drive op amps for tft lcds 4 _______________________________________________________________________________________ typical operating characteristics (continued) (v dd = 19v, gnd = 0, v cm = v out = v dd /2, t a = +25?, unless otherwise specified.) 0 2 1 4 3 7 6 5 8 -50 0 -25 25 50 75 100 125 supply current vs. temperature MAX9650 toc04 temperature ( c) supply current (ma) i out (500ma/div) v out (125ma/div) load transient sourcing MAX9650 toc05 time (1 s/div) 0.1a response 1a response 0.5a response i out (500ma/div) v out (125mv/div) load transient sinking MAX9650 toc06 time (1 s/div) 0.1a response 1a response 0.5a response 100ms/div startup waveform i dd 10ma/div v dd 10v/div v in 5v/div v out 5v/div MAX9650 toc07 2 s/div MAX9650 step response with various c l v out 5v/div v out 5v/div v out 5v/div v out 5v/div MAX9650 toc08 c l = 10pf c l = 2200pf c l = 0.01 f c l = 0.022 f open-loop gain and phase vs. frequency MAX9650 toc09 frequency (hz) gain (db) 10e+6 1e+6 10e+3 100e+3 1e+3 100e+0 -60 -40 -20 0 20 40 60 80 100 120 -80 10e+0 100e+6 gain phase c l = 100pf -180 -120 -60 0 60 120 180 240 300 360 -240 phase (deg) closed-loop small-signal frequency response for various c l MAX9650 toc10 frequency (mhz) voltage gain (db) 10 1 0.1 -10 -5 0 5 10 15 20 -15 0.01 100 c l = 0.1 f c l = 0.01 f c l = 100pf c l = 56pf c l = 10pf c l = 560pf c l = 0.001 f c l = 0.0022 f small-signal gain vs. frequency MAX9650 toc11 frequency (hz) gain (db) 10e+6 1e+6 -6 -5 -4 -3 -2 -1 0 1 2 3 -7 100e+3 100e+6 v out = 100mv p-p r l = 10k ? to v dd /2 small-signal gain vs. frequency with various c l MAX9650 toc12 frequency (hz) gain (db) 10e+6 1e+6 -20 -15 -10 -5 0 5 10 15 20 -25 100e+3 100e+6 10,000pf 1000pf 100pf 10pf v out = 100mv p-p r l = 10k ? to v dd /2
detailed description the MAX9650/max9651 operational rail-to-rail input/output amplifiers hold the vcom voltage stable while providing the ability to source and sink a high cur- rent quickly (1.3a) into a capacitive load such as the backplane of a tft-lcd panel. thermal shutdown with temperature hysteresis the MAX9650/max9651 are capable of high output currents and feature thermal-shutdown protection with temperature hysteresis. when the die temperature reaches +170?, the device shuts down. when the die cools down by 15?, the device turns on again. in a tft-lcd application, the duty cycle is very low. even with high values of voltage and current, the power dissi- pation is low and the chip does not shut down. applications information output load the MAX9650/max9651 are designed to drive capaci- tive loads. a small value of series resistance improves the performance of the device to ensure stability and fast settling with very large or very small capacitive loads. in many cases, this resistance is already present due to connection resistance in the wiring and no addi- tional physical resistor is necessary. power supplies and bypass capacitors the MAX9650/max9651 operate from a 6v to 20v single supply or from ?.5v to ?0v dual supplies. proper sup- ply bypassing ensures stability while driving high tran- sient loads. the MAX9650/max9651 require a minimum 10? (c1) and 0.1? (c2) power-supply bypass capaci- tors placed as close as possible to the power-supply pin MAX9650/max9651 high-current vcom drive op amps for tft lcds _______________________________________________________________________________________ 5 pin description pin MAX9650 sot23 ?ax max9651 name function 1 6 1 outa vcom output a 2 4 4 gnd ground 3 3 3 ina+ positive input a 4 2 2 ina- negative input a 57 8 v dd positive-supply input. bypass v dd to gnd with a 0.1? capacitor as close as possible to the device. 5 inb+ positive input b 6 inb- negative input b 7 outb vcom output b 1, 5, 8 n.c. no connection. not internally connected. ep exposed pad. ep is internally connected to gnd. connect ep to gnd. in_+ in_- gnd out_ v dd lcd vcom load 19v supply v ref *10 f and 0.1 f capacitors as close as possible to the pin. **(r s = r gen ) x c lcd x 6 < 2 s, where r gen = generator source impedance. MAX9650 *c2 = 0.1 f *c1 = 10 f 19v supply v out_ c lcd = 0.1 f r s = 2.2 ? **0v to 2.2v at 50khz figure 1. settling time test circuit
MAX9650/max9651 high-current vcom drive op amps for tft lcds 6 _______________________________________________________________________________________ (v dd ). see figure 2. for dual-supply operation, use 10? and 0.1? bypass capacitors on both supplies (v dd and gnd) with each capacitor placed as close as possible to v dd and gnd. layout and grounding the exposed pad on the ?ax and tdfn packages provide a low thermal resistance for heat dissipation. solder the exposed pad to a ground plane for best thermal performance. do not route traces under these packages. for dual-supply operation, the exposed pad (ep) can be electrically connected to the negative sup- ply or it can be left unconnected. chip information process: bicmos ?ax is a registered trademark of maxim integrated products, inc. in_+ in_- gnd out_ v dd tft lcd tft-lcd capacitance 16v supply v ref *10 f and 0.1 f capacitors as close as possible to the pin. **r s may be needed for some applications. **r s MAX9650 *c2 = 0.1 f *c1 = 10 f 19v supply figure 2. typical tft-lcd backplane drive circuit gnd ina- ina+ 1 5v dd outa MAX9650 thin sot23 2 34 outa n.c. gnd 1 2 8 7 n.c. v dd ina- ina+ n.c. max-ep (tdfn-ep) max-ep (tdfn-ep) 3 4 6 5 MAX9650 inb- inb+ gnd 1 2 8 7 v dd outb ina- ina+ outa 3 4 6 5 max9651 + + + pin configurations
MAX9650/max9651 high-current vcom drive op amps for tft lcds _______________________________________________________________________________________ 7 package type package code document no. 5 sot23 z5-2 21-0113 8 ?ax u8e-2 21-0107 8 tdfn-ep t833-2 21-0137 package information for the latest package outline information and land patterns, go to www.maxim-ic.com/packages . thin sot23.eps
MAX9650/max9651 high-current vcom drive op amps for tft lcds 8 _______________________________________________________________________________________ package information (continued) for the latest package outline information and land patterns, go to www.maxim-ic.com/packages .
MAX9650/max9651 high-current vcom drive op amps for tft lcds _______________________________________________________________________________________ 9 8l, max, exp pad.eps c 1 1 21-0107 package information (continued) for the latest package outline information and land patterns, go to www.maxim-ic.com/packages .
MAX9650/max9651 high-current vcom drive op amps for tft lcds 10 ______________________________________________________________________________________ 6, 8, &10l, dfn thin.eps package information (continued) for the latest package outline information and land patterns, go to www.maxim-ic.com/packages .
MAX9650/max9651 high-current vcom drive op amps for tft lcds ______________________________________________________________________________________ 11 common dimensions symbol min. max. a 0.70 0.80 d 2.90 3.10 e 2.90 3.10 a1 0.00 0.05 l 0.20 0.40 pkg. code n d2 e2 e jedec spec b [(n/2)-1] x e package variations 0.25 min. k a2 0.20 ref. 2.00 ref 0.250.05 0.50 bsc 2.300.10 10 t1033-1 2.40 ref 0.200.05 - - - - 0.40 bsc 1.700.10 2.300.10 14 t1433-1 1.500.10 mo229 / weed-3 0.40 bsc - - - - 0.200.05 2.40 ref t1433-2 14 2.300.10 1.700.10 t633-2 6 1.500.10 2.300.10 0.95 bsc mo229 / weea 0.400.05 1.90 ref t833-2 8 1.500.10 2.300.10 0.65 bsc mo229 / weec 0.300.05 1.95 ref t833-3 8 1.500.10 2.300.10 0.65 bsc mo229 / weec 0.300.05 1.95 ref 2.300.10 mo229 / weed-3 2.00 ref 0.250.05 0.50 bsc 1.500.10 10 t1033-2 package information (continued) for the latest package outline information and land patterns, go to www.maxim-ic.com/packages .
MAX9650/max9651 high-current vcom drive op amps for tft lcds 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. 12 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2009 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. revision history revision number revision date description pages changed 0 7/08 initial release 1 10/08 updated slew rate and added tdfn-ep package 1, 2, 6, 10, 11 2 5/09 updated continuous output current specification 2

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