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general description the max4210/max4211 low-cost, low-power, high-side power/current monitors provide an analog output volt- age proportional to the power consumed by a load by multiplying load current and source voltage. the max4210/max4211 measure load current by using a high-side current-sense amplifier, making them espe- cially useful in battery-powered systems by not interfer- ing with the ground path of the load. the max4210 is a small, simple 6-pin power monitor intended for limited board space applications. the max4210a/b/c integrate an internal 25:1 resistor-divider network to reduce component count. the max4210d/e/f use an external resistor-divider network for greater design flexibility. the max4211 is a full-featured current and power mon- itor. the device combines a high-side current-sense amplifier, 1.21v bandgap reference, and two compara- tors with open-drain outputs to make detector circuits for overpower, overcurrent, and/or overvoltage condi- tions. the open-drain outputs can be connected to potentials as high as 28v, suitable for driving high-side switches for circuit-breaker applications. both the max4210/max4211 feature three different cur- rent-sense amplifier gain options: 16.67v/v, 25.00v/v, and 40.96v/v. the max4210 is available in 3mm x 3mm, 6-pin tdfn and 8-pin ?ax packages and the max4211 is available in 4mm x 4mm, 16-pin thin qfn and 16-pin tssop packages. both parts are specified for the -40? to +85? extended operating temperature range. applications overpower circuit breakers smart battery packs/chargers smart peripheral control short-circuit protection power-supply displays measurement instrumentation baseband analog multipliers vga circuits power-level detectors features real-time current and power monitoring 1.5% (max) current-sense accuracy 1.5% (max) power-sense accuracy two uncommitted comparators (max4211) 1.21v reference output (max4211) three current/power gain options 100mv/150mv current-sense full-scale voltage +4v to +28v input source voltage range +2.7v to +5.5v power-supply voltage range low supply current: 380a (max4210) 220khz bandwidth small 6-pin tdfn and 8-pin max packages (max4210) max4210/max4211 high-side power and current monitors ________________________________________________________________ maxim integrated products 1 ordering information + - max4211a max4211b max4211c iout v cc + rs- rs+ - r sense v sense load 1.21v reference pout ref 2.7v to 5.5v + - 4v to 28v cin1+ inhibit cout1 cout2 le cin1- cin2+ cin2- gnd 25:1 part temp range pin-package top mark max4210 aett-t -40 c to +85 c 6 tdfn-6-ep* (3mm x 3mm) ahf max4210aeua -40 c to +85 c 8 max functional diagrams 19-3285; rev 1; 5/05 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. * ep = exposed paddle. ordering information continued at end of data sheet. pin configurations and selector guide appear at end of data sheet. evaluation kits available functional diagrams continued at end of data sheet. ?ax is a registered trademark of maxim integrated products, inc.
max4210/max4211 high-side power and current monitors 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = 5.0v, v rs+ = 25v, v sense = 5mv, v in = 1.0v, v le = 0v, r iout = r pout = 1m ? , v cin1+ = v cin2+ = v ref , v cin1- = v cin2- = gnd, v inhibit = 0v, r cout1 = r cout2 = 5k ? connected to v cc , t a = -40 c to +85 c, unless otherwise noted. typical values are at t a = +25 c, unless otherwise noted.) (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. v cc , in, cin1, cin2 to gnd ....................................-0.3v to +6v rs+, rs-, inhibit, le, cout1, cout2 to gnd ...-0.3v to +30v iout, pout, ref to gnd ..........................-0.3v to (v cc + 0.3v) differential input voltage (v rs+ - v rs- ) .................................5v maximum current into any pin.......................................... 10ma output short-circuit duration to v cc or gnd ........................10s continuous power dissipation (t a = +70 c) 6-pin tdfn (derate 24.4mw/ c above +70 c) ..........1951mw 8-pin max (derate 4.5mw/ c above +70 c) .............362mw 16-pin tssop (derate 9.4mw/ c above +70 c) ..........754mw 16-pin thin qfn (derate 25mw/ c above +70 c) .....2000mw operating temperature range ...........................-40 c to +85 c junction temperature ......................................................+150 c storage temperature range .............................-65 c to +150 c lead temperature (soldering, 10s) .................................+300 c parameter symbol conditions min typ max units operating voltage range (note 2) v cc 2.7 5.5 v common-mode input range (note 3) v cmr measured at rs+ 4 28 v max4210 380 570 t a = +25 c, v cc = +5.5v max4211 670 960 max4210 670 supply current i cc v cc = +5.5v max4211 1100 a max421_a/b/c 14 25 i rs+ v sense = 0mv max421_d/e/f 3 8 input bias current i rs- v sense = 0mv 3 8 a in input bias current i in max421_d/e/f -0.1 -1 a leakage current i rs+ , i rs- v cc = 0v 0.1 1 a max421_a/b/d/e 150 v sense full-scale voltage (note 4) v sense_fs max421_c/f 100 mv in full-scale voltage (note 4) v in_fs max421_d/e/f, v sense = 10mv to 100mv 1v in input voltage range (note 5) v in max421_d/e/f, v sense = 10mv to 100mv 0.16 1.10 v v rs+ full-scale voltage (note 4) max421_a/b/c, v sense = 10mv to 100mv 25 v v rs+ input voltage range (note 5) v rs+ max421_a/b/c, v sense = 10mv to 100mv 428v current into iout = 10a 1.5 current into iout = 100a 2.5 80 current into pout = 10a 1.5 minimum iout/pout voltage v out_min v sense = 0v, v rs+ = 25v c ur r ent i nto p o u t = 100a 2.5 80 mv current out of iout = 500a v cc - 0.25 maximum iout/pout voltage (note 6) v out_max v sense = 300mv, v rs+ = 25v current out of pout = 500a v cc - 0.25 v
parameter symbol conditions min typ max units max4211a/d 16.67 max4211b/e 25.00 current-sense amplifier gain v iout / v sense max4211c/f 40.96 v/v max421_a 0.667 max421_b 1.00 v pout / (v sense x v rs+ ) max421_c 1.64 max421_d 16.67 max421_e 25.00 power-sense amplifier gain v pout / (v sense x v in ) max421_f 40.96 1/v iout common-mode rejection cmri max4211, v rs+ = 4v to 28v 60 80 db pout common-mode rejection cmrp max421_d/e/f, v rs+ = 4v to 28v 60 80 db iout power-supply rejection psri v cc = 2.7v to 5.5v 52 80 db pout power-supply rejection psrp v cc = 2.7v to 5.5v 52 70 db output resistance for pout, iout, ref r out 0.5 ? iout -3db bandwidth bw iout/sense v sense = 100mv, v sense ac source 220 khz bw pout/sense v sense = 100mv, v sense ac source 220 bw pout/vin v sense = 100mv, v in ac source, max421_d/e/f 500 pout -3db bandwidth bw pout/rs+ v sense = 100mv, v rs+ ac source, max421_a/b/c 250 khz capacitive-load stability (pout, iout, ref) c load no sustained oscillations 450 pf v s e n s e = 10m v to 100m v 15 current output (iout) settling time to 1% of final value max4211 v s e n s e = 100m v to 10m v 15 s v s e n s e = 10m v to 100m v 10 v s e n s e = 100m v to 10m v 10 v rs+ = 4v to 25v, v sense = 100mv 15 m ax 421_a/b/c v rs+ = 25v to 4v, v sense = 100mv 15 v s e n s e = 10m v to 100m v 10 v s e n s e = 100m v to 10m v 10 v in = 160mv to 1v, v sense = 100mv 10 power output (pout) settling time to 1% of final value m ax 421_d /e /f v in = 1v to 160mv, v sense = 100mv 10 s max4210/max4211 high-side power and current monitors _______________________________________________________________________________________ 3 electrical characteristics (continued) (v cc = 5.0v, v rs+ = 25v, v sense = 5mv, v in = 1.0v, v le = 0v, r iout = r pout = 1m ? , v cin1+ = v cin2+ = v ref , v cin1- = v cin2- = gnd, v inhibit = 0v, r cout1 = r cout2 = 5k ? connected to v cc , t a = -40 c to +85 c, unless otherwise noted. typical values are at t a = +25 c, unless otherwise noted.) (note 1)
parameter symbol conditions min typ max units power-up time to 1% of current output final value v sense = 100mv, c load = 10pf, max4211 100 s power-up time to 1% of power output final value v sense = 100mv, c load = 10pf 100 s c load = 10pf, v sense = -100mv to +100mv 35 saturation recovery time for current out (note 7) c load = 10pf, v sense = 1.5v to 100mv 35 s v cc = 5v, v rs+ = 10v, c load = 10pf, v sense = -100mv to +100mv 25 saturation recovery time for power out (note 7) v cc = 5v, v rs+ = 10v, c load = 10pf, v sense = 1.5v to 100mv 25 s i ref = 0 to 100a, t a = +25 c 1.20 1.21 1.22 reference voltage v ref i ref = 0 to 100a, t a = -40 c to +85 c 1.19 1.23 v comparator input offset common-mode voltage = ref 0.5 5mv comparator hysteresis 5mv comparator common-mode low functional test 0.1 v comparator common-mode high functional test v cc - 1.15 v comparator input bias current i bias -2 na comparator output low voltage v ol i sink = 1ma 0.2 0.6 v comparator output-high leakage current (note 8) v pullup = 28v 1 a le logic input-high voltage threshold v ih 0.67 x v cc v le logic input-low voltage threshold v il 0.33 x v cc v le logic input internal pulldown current 0.68 1 2.20 a inhibit logic input-high voltage threshold 1.3 v inhibit logic input-low voltage threshold 0.5 v inhibit logic input hysteresis 0.6 v inhibit logic input internal pulldown current 0.68 1 2.20 a max4210/max4211 high-side power and current monitors 4 _______________________________________________________________________________________ electrical characteristics (continued) (v cc = 5.0v, v rs+ = 25v, v sense = 5mv, v in = 1.0v, v le = 0v, r iout = r pout = 1m ? , v cin1+ = v cin2+ = v ref , v cin1- = v cin2- = gnd, v inhibit = 0v, r cout1 = r cout2 = 5k ? connected to v cc , t a = -40 c to +85 c, unless otherwise noted. typical values are at t a = +25 c, unless otherwise noted.) (note 1)
parameter symbol conditions min typ max units comparator propagation delay t pd+ , t pd- c load = 10pf, r load = 10k ? pullup to v cc , 5mv overdrive 4s minimum inhibit pulse width 1s minimum le pulse width 1s comparator power-up blanking time from v cc t on v cc from 0 to (2.7v to 5.5v) 300 s latch setup time t setup 3s max4210a/max4211a (power gain = 0.667) t a = +25 c 0.5 1.5 ? v pout / ? v sense v sense = 10mv to 100mv, v rs+ = 25v t a = t min to t max 3.0 t a = +25 c 0.5 1.5 pout gain accuracy (note 9) ? v pout / ? v rs+ v sense = 100mv, v rs+ = 5v to 25v t a = t min to t max 3.0 % t a = +25 c 0.15 1.5 ? v pout_max / fso v sense = 5mv to 100mv, v rs+ = 5v to 25v t a = t min to t max 3.0 % fso* t a = +25 c 0.2 1.5 v sense = 150mv, v rs+ 15v t a = t min to t max 3.0 v sense = 100mv, v rs+ 4v 2.5 v sense = 100mv, v rs+ 9v 1.2 v sense = 50mv, v rs+ 6v 1.8 total pout output error (note 10) ? v pout_max / v pout v sense = 25mv, v rs+ 15v 1.8 % t a = +25 c 1.5 5 pout output offset voltage (note 11) v sense = 0v, v rs+ = 25v t a = t min to t max 15 mv max4210b/max4211b (power gain = 1.00) t a = +25 c 0.5 1.5 ? v pout / ? v sense v sense = 10mv to 100mv, v rs+ = 25v t a = t min to t max 3.0 t a = +25 c 0.5 1.5 pout gain accuracy (note 9) ? v pout / ? v rs+ v sense = 100mv, v rs+ = 5v to 25v t a = t min to t max 3.0 % max4210/max4211 high-side power and current monitors _______________________________________________________________________________________ 5 electrical characteristics (continued) (v cc = 5.0v, v rs+ = 25v, v sense = 5mv, v in = 1.0v, v le = 0v, r iout = r pout = 1m ? , v cin1+ = v cin2+ = v ref , v cin1- = v cin2- = gnd, v inhibit = 0v, r cout1 = r cout2 = 5k ? connected to v cc , t a = -40 c to +85 c, unless otherwise noted. typical values are at t a = +25 c, unless otherwise noted.) (note 1) * fso refers to full-scale output under the conditions: v sense = 100mv, v rs+ = +25v, or v in = 1v .
parameter symbol conditions min typ max units t a = +25 c 0.15 1.5 ? v pout_max / fso v sense = 5mv to 100mv, v rs+ = 5v to 25v t a = t min to t max 3.0 % fs o* t a = +25 c 0.2 1.5 v sense = 150mv, v rs+ > 15v t a = t min to t max 3.0 v sense = 100mv, v rs+ > 4v 2.5 v sense = 100mv, v rs+ > 9v 1.2 v sense = 50mv, v rs+ > 6v 1.8 total pout output error (note 10) ? v pout_max / v pout v sense = 25mv, v rs+ > 15v 1.8 % t a = +25 c 2 6.5 pout output offset voltage (note 11) v sense = 0v, v rs+ = 25v t a = t min to t max 20 mv max4210c/max4211c (power gain = 1.64) t a = +25 c 0.5 1.5 ? v pout / ? v sense v sense = 10mv to 100mv, v rs+ = 25v t a = t min to t max 3.0 t a = +25 c 0.5 1.5 pout gain accuracy (note 9) ? v pout / ? v rs+ v sense = 100mv, v rs+ = 5v to 25v t a = t min to t max 3.0 % t a = +25 c 0.15 1.5 ? v pout_max / fso v sense = 5mv to 100mv, v rs+ = 5v to 25v t a = t min to t max 3.0 % fs o* v sense = 100mv, v rs+ 4v 2.5 v sense = 100mv, v rs+ 9v 1.2 v sense = 50mv, v rs+ 6v 1.8 total pout output error (note 10) ? v pout_max / v pout v sense = 25mv, v rs+ 15v 1.8 % t a = +25 c310 pout output offset voltage (note 11) v sense = 0v, v rs+ = 25v t a = t min to t max 30 mv max4210d/max4211d (power gain = 16.67) t a = +25 c 0.5 1.5 ? v pout / ? v sense v sense = 10mv to 100mv, v in = 1v t a = t min to t max 3.0 t a = +25 c 0.5 1.5 pout gain accuracy (note 9) ? v pout / ? v in v sense = 100mv, v in = 0.2v to 1v t a = t min to t max 3.0 % max4210/max4211 high-side power and current monitors 6 _______________________________________________________________________________________ electrical characteristics (continued) (v cc = 5.0v, v rs+ = 25v, v sense = 5mv, v in = 1.0v, v le = 0v, r iout = r pout = 1m ? , v cin1+ = v cin2+ = v ref , v cin1- = v cin2- = gnd, v inhibit = 0v, r cout1 = r cout2 = 5k ? connected to v cc , t a = -40 c to +85 c, unless otherwise noted. typical values are at t a = +25 c, unless otherwise noted.) (note 1) * fso refers to full-scale output under the conditions: v sense = 100mv, v rs+ = +25v, or v in = 1v .
parameter symbol conditions min typ max units t a = +25 c 0.15 1.5 ? v pout_max / fso v sense = 5mv to 100mv, v rs+ = 25v, v in = 0.2v to 1v t a = t min to t max 3.0 % fs o* t a = +25 c 0.2 1.5 v sense = 150mv, v rs+ = 25v, v in = 600mv t a = t min to t max 3.0 v sense = 100mv, v rs+ = 15v, v in 160mv 2.5 v sense = 100mv, v rs+ = 15v, v in 360mv 1.2 v sense = 50mv, v rs+ = 15v, v in 240mv 1.8 total pout output error (note 10) ? v pout_max / v pout v sense = 25mv, v rs+ = 15v, v in 600mv 1.8 % t a = +25 c 1.5 5 pout output offset voltage (note 11) v sense = 0v, v rs+ = 25v, v in = 1v t a = t min to t max 15 mv max4210e/max4211e (power gain = 25.00) t a = +25 c 0.5 1.5 ? v pout / ? v sense v sense = 10mv to 100mv, v in = 1v t a = t min to t max 3.0 t a = +25 c 0.5 1.5 pout gain accuracy (note 9) ? v pout / ? v in v sense = 100mv, v in = 0.2v to 1v t a = t min to t max 3.0 % t a = +25 c 0.15 1.5 ? v pout_max / fso v sense = 5mv to 100mv, v rs+ = 25v, v in = 0.2v to 1v t a = t min to t max 3.0 % fs o* t a = +25 c 0.2 1.5 v sense = 150mv, v rs+ =25v, v in = 600mv t a = t min to t max 3.0 v sense = 100mv, v rs+ = 15v, v in 160mv 2.5 v sense = 100mv, v rs+ = 15v, v in 360mv 1.2 v sense = 50mv, v rs+ = 15v, v in 240mv 1.8 total pout output error (note 10) ? v pout_max / v pout v sense = 25mv, v rs+ = 15v, v in 600mv 1.8 % t a = +25 c 2 6.5 pout output offset voltage (note 11) v sense = 0v, v rs+ = 25v, v in = 1v t a = t min to t max 20 mv max4210/max4211 high-side power and current monitors _______________________________________________________________________________________ 7 electrical characteristics (continued) (v cc = 5.0v, v rs+ = 25v, v sense = 5mv, v in = 1.0v, v le = 0v, r iout = r pout = 1m ? , v cin1+ = v cin2+ = v ref , v cin1- = v cin2- = gnd, v inhibit = 0v, r cout1 = r cout2 = 5k ? connected to v cc , t a = -40 c to +85 c, unless otherwise noted. typical values are at t a = +25 c, unless otherwise noted.) (note 1) * fso refers to full-scale output under the conditions: v sense = 100mv, v rs+ = +25v, or v in = 1v .
max4210/max4211 high-side power and current monitors 8 _______________________________________________________________________________________ parameter symbol conditions min typ max units max4210f/max4211f (power gain = 40.96) t a = +25 c 0.5 1.5 ? v pout / ? v sense v sense = 10mv to 100mv, v in = 1v t a = t min to t max 3.0 t a = +25 c 0.5 1.5 pout gain accuracy (note 9) ? v pout / ? v in v sense = 100mv, v in = 0.2v to 1v t a = t min to t max 3.0 % t a = +25 c 0.15 1.5 ? v pout_max / fso v sense = 5mv to 100mv, v rs+ = 25v, v in = 0.2v to 1v t a = t min to t max 3.0 % fs o* v sense = 100mv, v rs+ = 15v, v in 160mv 2.5 v sense = 100mv, v rs+ = 15v, v in 360mv 1.2 v sense = 50mv, v rs+ = 15v, v in 240mv 1.8 total pout output error (note 10) ? v pout_max / v pout v sense = 25mv, v rs+ = 15v, v in 600mv 1.8 % t a = +25 c310 pout output offset voltage (note 11) v sense = 0v, v rs+ = 25v, v in = 1v t a = t min to t max 30 mv max4211a/max4211d (current gain = 16.67) t a = +25 c 0.5 1.5 iout gain accuracy ? v iout / ? v sense v sense = 20mv to 100mv, v rs+ = 25v t a = t min to t max 3.0 % t a = +25 c 0.15 1.5 ? v iout_max / fso v sense = 5mv to 100mv t a = t min to t max 3.0 % fs o* t a = +25 c 0.2 1.5 v sense = 150mv t a = t min to t max 3.0 v sense = 50mv 1.2 v sense = 25mv 1.8 total iout output error (note 10) ? v iout _ max / v iout v sense = 5mv 20 % electrical characteristics (continued) (v cc = 5.0v, v rs+ = 25v, v sense = 5mv, v in = 1.0v, v le = 0v, r iout = r pout = 1m ? , v cin1+ = v cin2+ = v ref , v cin1- = v cin2- = gnd, v inhibit = 0v, r cout1 = r cout2 = 5k ? connected to v cc , t a = -40 c to +85 c, unless otherwise noted. typical values are at t a = +25 c, unless otherwise noted.) (note 1) * fso refers to full-scale output under the conditions: v sense = 100mv, v rs+ = +25v, or v in = 1v .
max4210/max4211 high-side power and current monitors _______________________________________________________________________________________ 9 * fso refers to full-scale output under the conditions: v sense = 100mv, v rs+ = +25v, or v in = 1v . note 1: all devices are 100% production tested at t a = +25 c. all temperature limits are guaranteed by design. note 2: guaranteed by power-supply rejection test. note 3: guaranteed by output voltage error tests (iout). note 4: guaranteed by output voltage error tests (iout or pout, or both). note 5: in input voltage range (max421_d/e/f) and v rs+ input voltage range (max421_a/b/c) are guaranteed by design (gbd) and not production tested. see multiplier transfer characteristics graphs in the typical operating characteristics . note 6: this test does not apply to the low gain options, max421_a/d, because out is clamped at approximately 4v. note 7: the device does not experience phase reversal when overdriven. note 8: v pullup is defined as an externally applied voltage through a resistor, r pullup , to pull up the comparator output. note 9: pout gain accuracy is the sum of gain error and multiplier nonlinearity. note 10: total output voltage error is the sum of gain and offset voltage errors. note 11: pout output offset voltage is the sum of offset and multiplier feedthrough. parameter symbol conditions min typ max units max4211b/max4211e (current gain = 25.00) t a = +25 c 0.5 1.5 iout gain accuracy ? v iout / ? v sense v sense = 20mv to 100mv, v rs+ = 25v t a = t min to t max 3.0 % t a = +25 c 0.15 1.5 ? v iout_max / fso v sense = 5mv to 100mv t a = t min to t max 3.0 % fs o* t a = +25 c 0.2 1.5 v sense = 150mv t a = t min to t max 3.0 v sense = 50mv 1.2 v sense = 25mv 1.8 total iout output error (note 10) ? v iout _ max / v iout v sense = 5mv 20 % max4211c/max4211f (current gain = 40.96) t a = +25 c 0.5 1.5 iout gain accuracy ? v iout / ? v sense v sense = 20mv to 100mv, v rs+ =25v t a = t min to t max 3.0 % t a = +25 c 0.15 1.5 ? v iout_max / fso v sense = 5mv to 100mv t a = t min to t max 3.0 % fs o* t a = +25 c 0.2 1.5 v sense = 100mv t a = t min to t max 3.0 v sense = 50mv 1.2 v sense = 25mv 1.8 total iout output error (note 10) ? v iout _ max / v iout v sense = 5mv 20 % electrical characteristics (continued) (v cc = 5.0v, v rs+ = 25v, v sense = 5mv, v in = 1.0v, v le = 0v, r iout = r pout = 1m ? , v cin1+ = v cin2+ = v ref , v cin1- = v cin2- = gnd, v inhibit = 0v, r cout1 = r cout2 = 5k ? connected to v cc , t a = -40 c to +85 c, unless otherwise noted. typical values are at t a = +25 c, unless otherwise noted.) (note 1)
max4210/max4211 high-side power and current monitors 10 ______________________________________________________________________________________ 0.3 0.4 0.6 0.5 0.7 0.8 -40 10 -15 35 60 85 max4211 supply current vs. temperature max4210/11 toc04 temperature ( c) supply current (ma) v sense = 5mv v cc = 5.5v v cc = 4.0v v cc = 2.7v 0 2 4 6 8 10 12 14 16 -40 -15 10 35 60 85 rs+/rs- bias current vs. temperature max4210/11 toc05 temperature ( c) bias current ( a) rs+ (d/e/f versions) rs+ (a/b/c versions) v rs + = v rs - = 25v rs- 0 2 4 6 8 10 12 14 16 412 8 16202428 rs+/rs- bias current vs. common-mode voltage max4210/11 toc06 common-mode voltage (v) bias current ( a) rs- rs+ (d/e/f versions) rs+ (a/b/c versions) v rs + = v rs - -0.8 -0.6 -0.7 -0.4 -0.5 -0.1 -0.2 -0.3 0 2.7 3.5 3.1 3.9 4.3 4.7 5.1 5.5 power output error vs. supply voltage max4210/11 toc07 supply voltage (v) output error (%) t a = -40 c t a = 0 c t a = +85 c t a = +25 c -0.8 -0.6 -0.7 -0.4 -0.5 -0.1 -0.2 -0.3 0 2.7 3.5 3.1 3.9 4.3 4.7 5.1 5.5 current output error vs. supply voltage max4210/11 toc08 supply voltage (v) output error (%) t a = -40 c t a = 0 c t a = +85 c t a = +25 c -2.0 -1.4 -1.6 -1.8 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0 050 25 75 100 125 150 power output error vs. sense voltage max4210/11 toc09 sense voltage (mv) output error (%) t a = -40 c t a = +85 c t a = +25 c t a = 0 c 0.20 0.30 0.25 0.40 0.35 0.45 0.50 -40 10 -15 35 60 85 max4210 supply current vs. temperature max4210/11 toc03 temperature ( c) supply current (ma) v cc = 5.5v v cc = 4.0v v cc = 2.7v v sense = 5mv v cc = 5v 0.3 0.4 0.6 0.5 0.7 0.8 2.7 3.5 3.1 3.9 4.3 4.7 5.1 5.5 supply current vs. supply voltage max4210/11 toc01 supply voltage (v) supply current (ma) max4210 max4211 v sense = 5mv 0.2 0.4 0.3 0.6 0.5 0.7 0.8 41216 8 202428 supply current vs. common-mode voltage max4210/11 toc02 rs+ voltage (v) supply current (ma) max4210 max4211 v sense = 5mv v cc = 5v typical operating characteristics (v cc = 5.0v, v rs+ = 25v, v sense = 100mv, v in = 1v, v le = 0v, r iout = r pout = 1m ? , v cin1+ = v cin2+ = v ref , v cin1- = v cin2- = 0v, v inhibit = 0v, r cout1 = r cout2 = 5k ? connected to v cc , t a = +25 c, unless otherwise noted.)
typical operating characteristics (continued) (v cc = 5.0v, v rs+ = 25v, v sense = 100mv, v in = 1v, v le = 0v, r iout = r pout = 1m ? , v cin1+ = v cin2+ = v ref , v cin1- = v cin2- = 0v, v inhibit = 0v, r cout1 = r cout2 = 5k ? connected to v cc , t a = +25 c, unless otherwise noted.) max4210/max4211 high-side power and current monitors ______________________________________________________________________________________ 11 24.80 24.90 24.85 25.00 24.95 25.05 25.10 -40 10 -15 35 60 85 power gain vs. temperature max4210/11 toc13 temperature ( c) gain (1/v) max4211e 24.70 24.80 24.75 24.90 24.85 24.95 25.00 -40 10 -15 35 60 85 current gain vs. temperature max4210/11 toc14 temperature ( c) current gain (v/v) max4211e 0 0.5 1.5 1.0 2.0 2.5 0 0.6 0.3 0.9 1.2 1.5 multiplier transfer characteristics max4210/11 toc15 in voltage (v) pout voltage (v) max4211d v sense = 100mv v sense = 70mv v sense = 30mv 0 1 3 2 4 5 0 100 50 150 200 250 300 multiplier transfer characteristics max4210/11 toc16 sense voltage (mv) pout voltage (v) v rs + = 25v v rs + = 15v v rs + = 4v max4211b 0 1.0 0.5 2.0 1.5 2.5 3.0 41216 8 202428 multiplier transfer characteristics max4210/11 toc17 rs+ voltage (v) pout voltage (v) v sense = 100mv v sense = 70mv v sense = 30mv max4211b 1.200 1.205 1.210 1.215 1.220 reference voltage vs. supply voltage max4210/11 toc18 supply voltage (v) reference voltage (v) 2.7 3.9 4.3 3.1 3.5 4.7 5.1 5.5 -2.0 -1.4 -1.6 -1.8 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0 0 400 200 600 800 1000 1200 power output error vs. in voltage max4210/11 toc12 in voltage (mv) output error (%) t a = 0 c t a = -40 c t a = +25 c t a = +85 c -2.0 -1.4 -1.6 -1.8 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0 050 25 75 100 125 150 current output error vs. sense voltage max4210/11 toc10 sense voltage (mv) output error (%) t a = +85 c t a = +25 c t a = 0 c t a = -40 c -1.0 -0.4 -0.6 -0.8 0 -0.2 0.8 0.6 0.4 0.2 1.0 4 7 10 13 16 19 22 25 power output error vs. v rs + max4210/11 toc11 v rs + voltage (v) output error (%) max4211b t a = -40 c t a = 0 c t a = +85 c t a = +25 c
typical operating characteristics (continued) (v cc = 5.0v, v rs+ = 25v, v sense = 100mv, v in = 1v, v le = 0v, r iout = r pout = 1m ? , v cin1+ = v cin2+ = v ref , v cin1- = v cin2- = 0v, v inhibit = 0v, r cout1 = r cout2 = 5k ? connected to v cc , t a = +25 c, unless otherwise noted.) max4210/max4211 high-side power and current monitors 12 ______________________________________________________________________________________ 0 200 100 400 300 500 600 02 134 comparator output voltage (v ol ) vs. current sink max4210/11 toc22 current sink (ma) cout voltage (mv) 0 50 100 150 200 250 300 350 400 -40 -15 10 35 60 85 comparator output voltage (v ol ) vs. temperature max4210/11 toc23 temperature ( c) cout voltage (mv) current sink = 1ma 200 s/div comparator power-up delay cout 2v/div v cc 2v/div max4210/11 toc24 5v 0v 5v 0v 2 s/div comparator propagation delay c out 2v/div v cin+ max4210/11 toc25 v od = 5mv 5v 0v 4 s/div comparator ac response c out 2v/div 0.95v max4210/11 toc26 c in- = 1.21v 1.45v cin+ 5v 0v 200 s/div pout power-up delay pout 1v/div max4210/11 toc27 v cc 2v/div max4211e 5v 0v 2.5v 0v 0.6 1.0 0.8 1.4 1.2 1.6 1.8 -40 10 -15 356085 comparator propagation delay vs. temperature max4210/11 toc21 temperature ( c) propagation delay ( s) 1.220 1.215 1.210 1.205 1.200 -40 10 -15 35 60 85 reference voltage vs. temperature max4210/11 toc19 temperature ( c) reference voltage (v) 0 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0 50 100 150 200 comparator propagation delay vs. overdrive voltage max4210/11 toc20 overdrive voltage (mv) propagation delay ( s) 0.2
max4210/max4211 high-side power and current monitors ______________________________________________________________________________________ 13 20ms/div rs power-up/down response pout pout 1v/div max4210/11 toc31 v rs + 5v/div 0v 0v 2.5v 10v 20ms/div rs power-up/down response iout iout 1v/div max4210/11 toc32 v rs + 5v/div 0v 0v 2.5v 10v 10 s/div pout small-signal pulse response pout 100mv/div max4210/11 toc33 v sense = 10mv to 20mv step 470pf load 200 s/div iout power-up delay iout 1v/div max4210/11 toc28 v cc 2v/div 5v 2.5v 0v max4211e 0v 2ms/div v cc power-up/down response pout pout 2v/div max4210/11 toc29 v cc 2v/div v sense = 150mv max4211e 0v 0v 2ms/div v cc power-up/down response iout iout 2v/div max4210/11 toc30 v cc 2v/div v sense max4211e v sense = 150mv 0v 0v typical operating characteristics (continued) (v cc = 5.0v, v rs+ = 25v, v sense = 100mv, v in = 1v, v le = 0v, r iout = r pout = 1m ? , v cin1+ = v cin2+ = v ref , v cin1- = v cin2- = 0v, v inhibit = 0v, r cout1 = r cout2 = 5k ? connected to v cc , t a = +25 c, unless otherwise noted.)
max4210/max4211 high-side power and current monitors 14 ______________________________________________________________________________________ typical operating characteristics (continued) (v cc = 5.0v, v rs+ = 25v, v sense = 100mv, v in = 1v, v le = 0v, r iout = r pout = 1m ? , v cin1+ = v cin2+ = v ref , v cin1- = v cin2- = 0v, v inhibit = 0v, r cout1 = r cout2 = 5k ? connected to v cc , t a = +25 c, unless otherwise noted.) pout common-mode rejection ratio vs. frequency max4210/11 toc39 frequency (mhz) cmrr (db) 0.1 0.01 -80 -70 -60 -50 -40 -30 -20 -90 0.001 1 v sense = 100mv 10 s/div pout slew-rate pulse response pout 1v/div max4210/11 toc37 v sense = 10mv to 90mv step no load 10 s/div iout slew-rate pulse response iout 1v/div max4210/11 toc38 v sense = 10mv to 90mv step no load 10 s/div pout large-signal pulse response pout 1v/div max4210/11 toc35 v sense = 10mv to 90mv step 470pf load 10 s/div iout large-signal pulse response pout 1v/div max4210/11 toc36 v sense = 10mv to 90mv step 470pf load 10 s/div iout small-signal pulse response iout 100mv/div max4210/11 toc34 v sense = 10mv to 20mv step 470pf load
max4210/max4211 high-side power and current monitors ______________________________________________________________________________________ 15 iout common-mode rejection ratio vs. frequency max4210/11 toc40 frequency (mhz) cmrr (db) 0.1 0.01 -80 -70 -60 -50 -40 -30 -20 -90 0.001 1 v sense = 100mv power-supply rejection vs. frequency max4210/11 toc41 frequency (hz) psr (db) 10k 1k 100 -70 -60 -50 -40 -30 -20 -10 0 -80 10 100k pout small-signal gain vs. frequency max4210/11 toc42 frequency (mhz) gain (db) 1 0.1 0.01 5 10 15 20 25 30 0 0.001 10 v sense = 10mv p-p iout small-signal gain vs. frequency max4210/11 toc43 frequency (mhz) gain (db) 1 0.1 0.01 5 10 15 20 25 30 0 0.001 10 v sense = 10mv p-p pout large-signal gain vs. frequency max4210/11 toc44 frequency (mhz) gain (db) 0.1 0.01 5 10 15 20 25 30 0 0.001 1 v sense = 90mv p-p iout large-signal gain vs. frequency max4210/11 toc45 frequency (mhz) gain (db) 0.1 0.01 5 10 15 20 25 30 0 0.001 1 v sense = 90mv p-p in small-signal gain vs. frequency max4210/11 toc46 frequency (mhz) gain (db) 1 0.1 0.01 -15 -10 -5 0 -20 0.001 10 v in = 10mv p-p measured at pout v sense = 40mv 5 typical operating characteristics (continued) (v cc = 5.0v, v rs+ = 25v, v sense = 100mv, v in = 1v, v le = 0v, r iout = r pout = 1m ? , v cin1+ = v cin2+ = v ref , v cin1- = v cin2- = 0v, v inhibit = 0v, r cout1 = r cout2 = 5k ? connected to v cc , t a = +25 c, unless otherwise noted.)
max4210/max4211 high-side power and current monitors 16 ______________________________________________________________________________________ max4210a/b/c pin description * tdfn package only. pin 6 tdfn 8 max name function 1 1 gnd ground 2 2, 3, 6 n.c. no connection. not internally connected. 34 v cc power-supply voltage. connect a 0.1f bypass capacitor from v cc to gnd. 4 5 rs+ power connection to external-sense resistor and internal resistor-divider 5 7 rs- load-side connection for external-sense resistor 6 8 pout power output voltage. voltage output proportional to source power (input voltage multiplied by load current). ep ep* exposed paddle. ep is internally connected to gnd. max4210d/e/f pin description * tdfn package only. pin 6 tdfn 8 max name function 1 1 gnd ground 2 2 in multiplier input voltage. voltage input for internal multiplier. 34 v cc power-supply voltage. connect a 0.1f bypass capacitor from v cc to gnd. 4 5 rs+ power connection to external-sense resistor 5 7 rs- load-side connection for external-sense resistor 6 8 pout power output voltage. voltage output proportional to source power (input voltage multiplied by load current). ep ep* exposed paddle. ep is internally connected to gnd. 3, 6 n.c. no connection. not internally connected.
max4210/max4211 high-side power and current monitors ______________________________________________________________________________________ 17 max4211a/b/c pin description * thin qfn package only. pin 16 thin qfn 16 tssop name function 13v cc power-supply voltage. connect a 0.1f bypass capacitor from v cc to gnd. 2 4 n.c. no connection. not internally connected. 35 le latch enable for comparator 1. driving logic low makes the comparator transparent (regular comparator). driving logic high latches the output. 4 6 cout1 op en- d r ai n c om p ar ator 1 outp ut. le and in h ibit contr ol the com p ar ator 1 outp ut. 5 7 inhibit inhibit for comparator 1 output. driving logic high inhibits the comparator operation. drive logic low for normal operation. 6 8 cout2 open-drain comparator 2 output 7 9 gnd ground 8 10 cin2+ comparator 2 positive input 9 11 cin2- comparator 2 negative input 10 12 cin1+ comparator 1 positive input 11 13 cin1- comparator 1 negative input 12 14 ref 1.21v internal reference output 13 15 pout power output voltage. voltage output proportional to source power (input voltage multiplied by load current). 14 16 iout current output voltage. voltage output proportional to v sense (v rs+ - v rs- ) load current. 15 1 rs- load-side connection for external-sense resistor 16 2 rs+ power connection to external-sense resistor and internal resistor-divider ep ep* exposed paddle. ep is internally connected to gnd.
max4210/max4211 high-side power and current monitors 18 ______________________________________________________________________________________ * thin qfn package only. max4211d/e/f pin description functional diagrams pin 16 thin qfn 16 tssop name function 13v cc power-supply voltage. connect a 0.1f bypass capacitor from v cc to gnd. 2 4 in multiplier input voltage. voltage input for internal multiplier. 35 le latch enable for comparator 1. driving logic low makes the comparator transparent (regular comparator). driving logic high latches the output. 4 6 cout1 open-drain comparator 1 output. output controlled by le and inhibit. 5 7 inhibit inhibit for comparator 1 output. driving logic high inhibits the comparator operation. drive logic low for normal operation. 6 8 cout2 open-drain comparator 2 output 7 9 gnd ground 8 10 cin2+ comparator 2 positive input 9 11 cin2- comparator 2 negative input 10 12 cin1+ comparator 1 positive input 11 13 cin1- comparator 1 negative input 12 14 ref 1.21v internal reference output 13 15 pout power output voltage. voltage output proportional source power (input voltage multiplied by load current). 14 16 iout current output voltage. voltage output proportional v sense (v rs+ - v rs- ) load current. 15 1 rs- load-side connection for external-sense resistor 16 2 rs+ power connection to external-sense resistor ep ep* exposed paddle. ep is internally connected to gnd. + - max4210a max4210b max4210c v cc + rs- rs+ - r sense v sense load pout 2.7v to 5.5v + - 4v to 28v gnd + - max4210d max4210e max4210f v cc + rs- rs+ - r sense v sense load pout 2.7v to 5.5v + - in 0 to 1v + - 4v to 28v gnd 25:1
detailed description the max4210/max4211 families of current- and power- monitoring ics integrate a precision current-sense amplifier and an analog multiplier for a variety of cur- rent and power measurements. the max4211 inte- grates an additional uncommitted 1.21v reference and two comparators with open-drain outputs. these fea- tures enable the design of detector circuits for over- power, overcurrent, overvoltage, or any combination of fault conditions. the max4210/max4211 offer various gains, packages, and configurations allowing for greater design flexibility and lower overall cost. these devices monitor the load current with their high- side current-sense amplifiers and provide an analog output voltage proportional to that current at iout (max4211). this voltage is fed to the analog multiplier for multiplying the load current with a source voltage to obtain a voltage proportional to load power at pout. current-sense amplifier the integrated current-sense amplifier is a differential amplifier that amplifies the voltage across rs+ and rs-. a sense resistor, r sense , is connected across rs+ and rs-. a voltage drop across r sense is developed when a load current is passed through it. this voltage is amplified and is proportional to the load current. this voltage is also fed to the analog multiplier for power- sensing applications (see the analog multiplier sec- tion). the current-sense amplifiers feature three gain options: 16.67v/v, 25.0v/v, and 40.96v/v (see table 1). max4210/max4211 high-side power and current monitors ______________________________________________________________________________________ 19 functional diagrams (continued) + - max4211a max4211b max4211c iout v cc + rs- rs+ - r sense v sense load 1.21v reference pout ref 2.7v to 5.5v + - 4v to 28v cin1+ inhibit cout1 cout2 le cin1- cin2+ cin2- gnd + - max4211d max4211e max4211f iout v cc + rs- rs+ - r sense v sense load 1.21v reference pout ref 2.7v to 5.5v + - 0 to 1v + - 4v to 28v cin1+ inhibit cout1 cout2 le cin1- cin2+ cin2- gnd in 25:1
max4210/max4211 the common-mode voltage range is +4v to +28v and independent of the supply voltage. with this feature, the device can monitor the output current of a high-voltage source while running at a lower system voltage typically between 2.7v and 5.5v. the max4211 has a current-sense amplifier output. the voltage at iout is proportional to the voltage across v sense : v iout = a viout x v sense where v sense is the voltage across rs+ and rs-, and a viout is the amplifier gain of the device given in table 1. analog multiplier the max4210/max4211 integrate an analog multiplier that enables real-time monitoring of power delivered to a load. the voltage proportional to the load current is fed to one input of the multiplier and a voltage propor- tional to the source voltage is fed to the other. the ana- log multiplier multiplies these two voltages to obtain an output voltage proportional to the load power. the ana- log multiplier is designed only to operate in the positive quadrant, that is, the inputs and outputs are always positive voltages. for the max4210d/e/f and max4211d/e/f, the analog multiplier full-scale input at in is approximately 1v. this independent multiplier input allows greater design flexi- bility when using an external voltage-divider. for the max4210a/b/c and max4211a/b/c, an integrated volt- age-divider divides the source voltage at the rs+ pin by a nominal value of 25 and passes this voltage to the multiplier. thus, the full-scale input voltage at rs+ is 25v. the integrated, trimmed resistor-dividers reduce external component count and cost. the voltage output at pout is proportional to the output power: for the max4210a/b/c and max4211a/b/c: v pout = a vpout x v sense x v rs+ for the max4210d/e/f and max4211d/e/f: v pout = a vpout x v sense x v in where v sense is the voltage across rs+ and rs- and a vpout is the amplifier gain of the device given in table 2. internal comparators (max4211) the max4211 features two uncommitted open-drain output comparators. these comparators can be config- ured to trip when load current or power reaches a set limit. they can also be configured as a window com- parator with wire-or output. comparator 1 (cout1) features latch-enable (le) and inhibit (inhibit) inputs. when le is low, the comparator is transparent (it func- tions as a regular unlatched comparator). when le is high, the comparator output (cout1) is latched. when high, the inhibit input suspends the comparator oper- ation and latches the output to the current state. the operation of inhibit is similar to le, except it has a dif- ferent input threshold and wider hysteresis. the inhib- it logic-high threshold is 1.21v and logic-low threshold is 0.6v with 0.6v hysteresis. inhibit is useful in pre- venting the comparator from giving false output during fast rs+ transients. inhibit is generally triggered by an rc network connected to rs+ (see the applications information ). both comparators have a built-in 300s blanking period at power-up to prevent false outputs. the comparator outputs are open drain and they can be pulled up to v cc , rs+, or any voltage less than +28v. le and inhibit are internally pulled down by a 1a source. high-side power and current monitors 20 ______________________________________________________________________________________ part current-sense amplifier gain (a viout , v/v) full-scale sense voltage (mv) max4211a/d 16.67 150 max4211b/e 25.00 150 max4211c/f 40.96 100 table 1. max4211 current-sense amplifier gain and full-scale sense voltage part power-sense amplifier gain (a vpout , 1/v) full-scale sense voltage (mv) max4210a 0.667 150 max4210b 1.000 150 max4210c 1.640 100 max4210d 16.670 150 max4210e 25.000 150 max4210f 40.960 100 max4211a 0.667 150 max4211b 1.000 150 max4211c 1.640 100 max4211d 16.670 150 max4211e 25.000 150 max4211f 40.960 100 table 2. max4210/max4211 power-sense amplifier gain and full-scale sense voltage
internal reference (max4211) the max4211 features a 1.21v bandgap reference out- put, stable over supply voltage and temperature. typically, the reference output is connected to one of the comparators inputs. this is the comparison refer- ence voltage. if a lower reference voltage is needed, use an external voltage-divider. the reference can source or sink a load current up to 100a. max4210/max4211 high-side power and current monitors ______________________________________________________________________________________ 21 + - max4211a max4211b max4211c iout v cc + rs- - r sense v sense load 1.21v reference pout ref 2.7v to 5.5v + - 4v to 28v cin1+ inhibit cout1 cout2 le cin1- cin2+ r5 r4 r2 r7 r p v pullup r6 v pullup r3 c1 r1 cin2- gnd rs+ 25:1 typical operating circuit
max4210/max4211 applications information recommended component values ideally, the maximum load current develops the full- scale sense voltage across the current-sense resistor. choose the gain version needed to yield the maximum current-sense amplifier output voltage without saturat- ing it. the typical high-side saturation voltage is about v cc - 0.25v. the current-sense amplifier output voltage is given by: v iout = v sense x a viout where v iout is the voltage fed to the analog multiplier or at iout. v sense is the sense voltage. a viout is the current-sense amplifier gain of the device specified in table 1. calculate the maximum value for r sense so the differential voltage across rs+ and rs- does not exceed the full-scale sense voltage: choose the highest value resistance possible to maxi- mize v sense and thus minimize total output error. in applications monitoring high current, ensure that r sense is able to dissipate its own i 2 r power dissipa- tion. if the resistor s power dissipation is exceeded, its value can drift or it can fail altogether, causing a differ- ential voltage across the terminals in excess of the absolute maximum ratings. use resistors specified for current-sensing applications. window comparator in some applications where undercurrent or underpow- er (open-circuit fault) and overcurrent or overpower (short-circuit fault) needs to be monitored, a window comparator is desirable. figure 1 shows a simple circuit suitable for window detection. let p over be the mini- mum load power required to cause a low state at cout2, and let p under be the maximum load current required to cause a high state at cout1: where a vpout is the power-sense amplifier gain given in table 2, and v ref is the internal reference voltage (1.2v, typ). the resulting comparator output is high when the current is inside the current window and low when the current is outside the window. note that cout1 and cout2 are wire-ored together. overpower circuit breaker figure 2 shows a circuit breaker that shuts off current to the load when an overpower fault is detected (the same circuit can be used to detect overcurrent conditions by connecting the r1-r2 resistor-divider to iout, instead of pout). this circuit is useful for protecting the battery from short-circuit or overpower conditions. when a power fault is detected, the p-mosfet, m1, is turned off and stays off until the manual reset button is pressed. also, cycling the input power causes the le pin to go low, which unlatches the comparator output out1 and resets the circuit breaker. during power-up or when the characteristics of the load change, there can be an inrush current into the load. the temporary inrush current results in a higher voltage at pout. this can bring the voltage at cin+ above the ref- erence voltage at cin-, and, as a result, cout1 goes high triggering the circuit-breaker function. this unwanted behavior can be disabled by bringing comparator 1 s inhibit input high. an rc network connected to inhibit (r4 and c1) can be incorporated to suspend comparator 1 s operation for a brief period. in this way, short surges in load power can be made invisible to the circuit-breaker function, while longer term overpower load demands (or a load short circuit) still trip the breaker. the logic-high threshold for inhibit is typically 1.2v, and the logic-low threshold is 0.6v. during power-up, inhibit quickly exceeds 1.2v through c1 and inhibits cout1 from changing state. the comparator inputs are inhibited until the inhibit voltage is discharged to 0.6v. r3 is a current-limiting resistor, typically 10k ? , which protects the inhibit input. since inhibit is a high-impedance input, r3 has no effect on the r4-c1 charge/discharge time. the time during which the com- parator is suspended is approximated by: where ? v is the voltage change at the load. for improved transient immunity, t inhibit can be increased as required, with the understanding that the breaker function will be suspended for this period. if any comparator is not used, its input must be biased to a known state. for example, connect cin+ to v cc and cin- to gnd. trcin v v inhibit . = ? ? ? ? ? ? 4 1 06 ? p watts v ar rr r p watts v ar rr r under ref vpout sense over ref vpout sense () () = + ? ? ? ? ? ? = + ? ? ? ? ? ? 1 4 2 2 5 5 r v i sense sense full scale load full scale () () = ? ? high-side power and current monitors 22 ______________________________________________________________________________________
variable-gain amplifier figure 3 shows single-ended input, variable-gain ampli- fiers (vga). this vga features more than 200khz band- width and is useful in automatic gain-control circuits commonly found in baseband processors. the gain is controlled by applying 0 to 1v to in (v gc ) of the max4210d/e/f; 0v corresponds to minimum gain and 1v corresponds to maximum gain. measure load power the max4210a/b/c and max4211a/b/c have internal voltage-divider resistors connected to rs+ and the analog multiplier input. this configuration measures source power accurately and provides protection to the power source such as a battery. to measure the load power accurately, choose the max4210d/e/f and max4211d/e/f with an external resistor-divider con- nected directly to the load as shown in figure 4. this configuration improves the load-power measurement accuracy by excluding the additional power dissipated by r sense . power-supply bypassing bypass v cc to gnd with a 0.1f ceramic capacitor to isolate the ic from supply-voltage transients. to pre- vent high-frequency coupling, bypass rs+ or rs- with a 0.1f capacitor. on the tdfn and thin qfn pack- ages, there is an exposed paddle that does not carry any current, but should also be connected to the ground plane for rated power dissipation. max4210/max4211 high-side power and current monitors ______________________________________________________________________________________ 23 + - max4211a max4211b max4211c iout v cc + rs- - r sense v sense load 1.21v reference pout ref 2.7v to 5.5v + - 4v to 28v cin1+ inhibit cout1 cout2 over/ underpower le cin1- cin2+ r5 r4 r2 v pullup r1 cin2- gnd rs+ 25:1 figure 1. window comparator for detecting underpower and overpower faults (also detects undercurrent and overcurrent faults by r1 and r4 to iout instead of pout)
max4210/max4211 high-side power and current monitors 24 ______________________________________________________________________________________ + - max4211a max4211b max4211c iout v cc + rs- rs+ - r sense v sense load 1.21v reference pout ref 2.7v to 5.5v + - 4v to 28v cin1+ inhibit cout1 cout2 le cin1- cin2+ r2 r4 manual reset reset (from c) r3 c1 r1 m1 cin2- gnd r5 25:1 figure 2. overpower circuit breaker (for a detailed example, refer to the max4211e ev kit)
max4210/max4211 high-side power and current monitors ______________________________________________________________________________________ 25 in rs- rs+ v cc r 1 r 2 v output = v input ? (r 2 /r 1 ) ? a vpout ? v in v in gain control (0 to 1v) pout output input max4210d/e/f figure 3. single-ended-input, variable-gain amplifier + - max4210d/e/f max4211d/e/f v cc + rs- rs+ - r sense v sense load in pout 2.7v to 5.5v + - 4v to 28v gnd figure 4. load-power measurement with external voltage-divider
max4210/max4211 high-side power and current monitors 26 ______________________________________________________________________________________ selector guide c = current measurement output available (iout). p = power measurement output available (pout). y = yes. n = no. int = internal resistor-divider. ext = external input pin. part pin- package current gain (v/v) power gain (1/v) current/ power measurement output no. of comparators internal reference voltage- multiplier input (internal resistor-divider/ external input) full-scale v sense voltage (mv) max4210aett 6 tdfn 0.667 p none n int 150 max4210aeua 8 max 0.667 p none n int 150 max4210bett 6 tdfn 1.000 p none n int 150 max4210beua 8 max 1.000 p none n int 150 max4210cett 6 tdfn 1.640 p none n int 100 max4210ceua 8 max 1.640 p none n int 100 max4210dett 6 tdfn 16.670 p none n ext 150 max4210deua 8 max 16.670 p none n ext 150 max4210eett 6 tdfn 25.000 p none n ext 150 max4210eeua 8 ?ax 25.000 p none n ext 150 max4210fett 6 tdfn 40.960 p none n ext 100 max4210feua 8 ?ax 40.960 p none n ext 100 max4211aete 16 thin qfn 16.67 0.667 c/p 2 y int 150 max4211aeue 16 tssop 16.67 0.667 c/p 2 y int 150 max4211bete 16 thin qfn 25.00 1.000 c/p 2 y int 150 max4211beue 16 tssop 25.00 1.000 c/p 2 y int 150 max4211cete 16 thin qfn 40.96 1.640 c/p 2 y int 100 max4211ceue 16 tssop 40.96 1.640 c/p 2 y int 100 max4211dete 16 thin qfn 16.67 16.670 c/p 2 y ext 150 max4211deue 16 tssop 16.67 16.670 c/p 2 y ext 150 max4211eete 16 thin qfn 25.00 25.000 c/p 2 y ext 150 max4211eeue 16 tssop 25.00 25.000 c/p 2 y ext 150 max4211fete 16 thin qfn 40.96 40.960 c/p 2 y ext 100 max4211feue 16 tssop 40.96 40.960 c/p 2 y ext 100
max4210/max4211 high-side power and current monitors ______________________________________________________________________________________ 27 ordering information (continued) part temp range pin-package top mark max4210bett -40 c to +85 c 6 tdfn-6-ep* (3mm x 3mm) ahg max4210beua -40 c to +85 c 8 max max4210cett -40 c to +85 c 6 tdfn-6-ep* (3mm x 3mm) ahh max4210ceua -40 c to +85 c 8 max max4210dett -40 c to +85 c 6 tdfn-6-ep* (3mm x 3mm) ahi max4210deua -40 c to +85 c 8 max max4210eett -40 c to +85 c 6 tdfn-6-ep* (3mm x 3mm) ahj max4210eeua -40 c to +85 c 8 max max4210fett -40 c to +85 c 6 tdfn-6-ep* (3mm x 3mm) ahk max4210feua -40 c to +85 c 8 max max4211 aete -40 c to +85 c 16 thin qfn-ep* (4mm x 4mm) max4211aeue -40 c to +85 c 16 tssop max4211bete -40 c to +85 c 16 thin qfn-ep* (4mm x 4mm) max4211beue -40 c to +85 c 16 tssop max4211cete -40 c to +85 c 16 thin qfn-ep* (4mm x 4mm) max4211ceue -40 c to +85 c 16 tssop max4211dete -40 c to +85 c 16 thin qfn-ep* (4mm x 4mm) max4211deue -40 c to +85 c 16 tssop max4211eete -40 c to +85 c 16 thin qfn-ep* (4mm x 4mm) max4211eeue -40 c to +85 c 16 tssop max4211fete -40 c to +85 c 16 thin qfn-ep* (4mm x 4mm) max4211feue -40 c to +85 c 16 tssop * ep = exposed paddle. chip information max4210 transistor count: 515 max4211 transistor count: 1032 process: bicmos
max4210/max4211 high-side power and current monitors 28 ______________________________________________________________________________________ 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 rs- iout pout ref cin1- cin1+ cin2- cin2+ gnd top view max4211 tssop ( ) are for max421_d/e/f. rs+ v cc cout1 (in) n.c. le inhibit cout2 16 1 2 3 4 12 11 10 9 15 14 13 5 6 7 8 rs+ rs- iout pout ref cin1- cin1+ cin2- (in) n.c. le cout1 cin2+ gnd cout2 inhibit v cc max4211 1 2 3 4 8 7 6 5 pout rs- n.c. rs+ v cc n.c. (in) n.c. gnd max4210 max 3mm x 3mm tdfn 4mm x 4mm thin qfn 1 2 3 6 5 4 pout rs- rs+ gnd (in) n.c. v cc max4210 pin configurations
max4210/max4211 high-side power and current monitors ______________________________________________________________________________________ 29 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 .) 6, 8, &10l, dfn thin.eps l c l c pin 1 index area d e l e l a e e2 n g 1 2 21-0137 package outline, 6,8,10 & 14l, tdfn, exposed pad, 3x3x0.80 mm -drawing not to scale- k e [(n/2)-1] x e ref. pin 1 id 0.35x0.35 detail a b d2 a2 a1 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. 2.30?0.10 1.50?0.10 6 t633-1 0.95 bsc mo229 / weea 1.90 ref 0.40?0.05 1.95 ref 0.30?0.05 0.65 bsc 2.30?0.10 8 t833-1 2.00 ref 0.25?0.05 0.50 bsc 2.30?0.10 10 t1033-1 2.40 ref 0.20?0.05 - - - - 0.40 bsc 1.70?0.10 2.30?0.10 14 t1433-1 1.50?0.10 1.50?0.10 mo229 / weec mo229 / weed-3 0.40 bsc - - - - 0.20?0.05 2.40 ref t1433-2 14 2.30?0.10 1.70?0.10 t633-2 6 1.50?0.10 2.30?0.10 0.95 bsc mo229 / weea 0.40?0.05 1.90 ref t833-2 8 1.50?0.10 2.30?0.10 0.65 bsc mo229 / weec 0.30?0.05 1.95 ref t833-3 8 1.50?0.10 2.30?0.10 0.65 bsc mo229 / weec 0.30?0.05 1.95 ref -drawing not to scale- g 2 2 21-0137 package outline, 6,8,10 & 14l, tdfn, exposed pad, 3x3x0.80 mm downbonds allowed no no no no yes no yes no note: the tdfn exposed paddle size-variation package code: t633-1
max4210/max4211 high-side power and current monitors 30 ______________________________________________________________________________________ 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 .) 24l qfn thin.eps package outline, 21-0139 2 1 d 12, 16, 20, 24, 28l thin qfn, 4x4x0.8mm package outline, 21-0139 2 2 d 12, 16, 20, 24, 28l thin qfn, 4x4x0.8mm note: the thin qfn exposed paddle size-variation package code: t1644-4
max4210/max4211 high-side power and current monitors ______________________________________________________________________________________ 31 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 .) 8lumaxd.eps package outline, 8l umax/usop 1 1 21-0036 j rev. document control no. approval proprietary information title: max 0.043 0.006 0.014 0.120 0.120 0.198 0.026 0.007 0.037 0.0207 bsc 0.0256 bsc a2 a1 c e b a l front view side view e h 0.6 ? 0.1 0.6 ? 0.1 0.50?.1 1 top view d 8 a2 0.030 bottom view 1 6 s b l h e d e c 0 0.010 0.116 0.116 0.188 0.016 0.005 8 4x s inches - a1 a min 0.002 0.95 0.75 0.5250 bsc 0.25 0.36 2.95 3.05 2.95 3.05 4.78 0.41 0.65 bsc 5.03 0.66 6 0 0.13 0.18 max min millimeters - 1.10 0.05 0.15 dim
max4210/max4211 high-side power and current monitors 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. 32 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2005 maxim integrated products printed usa is a registered trademark of maxim integrated products, inc. 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 .) tssop4.40mm.eps

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