View MAX44280_4588042.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

MAX44280 1.8v, 50mhz, low-offset, low-power, rail-to-rail i/o op amp ????????????????????????????????????????????????????????????????? maxim integrated products 1 general description the MAX44280 offers a unique combination of high speed, precision, low noise, and low-voltage operation making it ideally suited for a large number of signal pro - cessing functions such as filtering and amplification of signals in portable and industrial equipment. the amplifier features an input offset of less than 50 f v and a high-gain bandwidth product of 50mhz while maintaining a low 1.8v supply rail. the device is internally compensated for gains of 5v/v or greater. the devices rail-to-rail input/outputs and low noise guarantee maxi - mum dynamic range in demanding applications such as 12- to 16-bit sar adc drivers. unlike traditional rail-to-rail input structures, input crossover distortion is absent due to an optimized input stage with an ultra-quiet charge pump. the MAX44280 includes a fast-power-on shutdown mode for further power savings. the MAX44280 operates from a supply range of 1.8v to 5.5v over the -40 n c to +125 n c temperature range and can operate down to 1.7v over the 0 n c to +70 n c tem - perature range. the MAX44280 is available in a small, 6-pin sc70 package and is also available in a 1mm x 1.5mm thin dfn (ultra-thin lga) package. features s low 1.8v supply rail over the -4 0 c to +125 c range s 1.7v supply rail over the 0 c to +70 c range s 50mhz bandwidth s low 12.7nv/ hz input voltage-noise density s low 1.2fa/ hz input current-noise density s low 50v (max) v os at +25 c s 500fa low input bias current s 750a quiescent current per amplifier s < 1a supply current in shutdown s small, 2mm x 2mm sc70 and 1mm x 1.5mm thin dfn packages s low 110db total harmonic distortion s 5v/v minimum stable gain applications notebooks 3g/4g handsets portable media players portable medical instruments battery-operated devices analog-to-digital converter buffers transimpedance amplifiers general-purpose signal processing 19-6157; rev 1; 4/12 ordering information appears at end of data sheet. typical a pplicati on circuit for related parts and recommended products to use with this part, refer to: www.maxim-ic.com/MAX44280.related MAX44280 +3.3v 3.3nf 10ki adc max11645 v sig 24ki 2.4ki evaluation kit available for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxims website at www.maxim-ic.com.
????????????????????????????????????????????????????????????????? maxim integrated products 2 MAX44280 1.8v, 50mhz, low-offset, low-power, rail-to-rail i/o op amp in+, in-, out ................................. (v ss - 0.3v) to (v dd + 0.3v) v dd to v ss ............................................................... -0.3v to +6v shdn ....................................................................... -0.3v to +6v output to short-circuit ground duration .............................. 10s continuous input current into any pin ............................ q 20ma continuous power dissipation ( t a = +70 n c) sc70 (derate 3.1mw/ n c above +70 n c) ...................... 245mw thin dfn (ultra-thin lga) (derate 2.1mw/ n c above +70 n c) ............................. 110.2mw operating temperature range ........................ -40 n c to +125 n c junction temperature ..................................................... +150 n c lead temperature (soldering, 10s) ................................ + 300 n c soldering temperature (reflow) ...................................... +260 n c absolute maximum ratings note 1: package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a four- layer board. for detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial . stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional opera - tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. sc70 junction-to-ambient thermal resistance ( b ja ) .... 326.5 n c/w junction-to-case thermal resistance ( b jc ) ............. 115 n c/w thin dfn (ultra-thin lga) junction-to-ambient thermal resistance ( b ja ) ....... 470 n c/w junction-to-case thermal resistance ( b jc ) ............ 120 n c/w package thermal characteristics (note 1) electrical characteristics (v dd = 3.3v, v ss = 0v, v in+ = v in- = v dd /2, r l = 10k i to v dd /2, v shdn = v dd , t a = -40 n c to +125 n c. typical values are at t a = +25 n c, unless otherwise noted.) (note 2) parameter symbol conditions min typ max units dc characteristics input voltage range v in+ v in- guaranteed by cmrr test -0.1 v dd + 0.1 v input offset voltage v os t a = +25 n c 10 50 f v t a = -40 c to +125 c after calibration 100 t a = -40 c to +125 c 500 input offset voltage drift v os - tc 0.8 5 f v/ n c input bias current i b t a = +25 n c 0.01 0.5 pa t a = -40 n c to +85 n c 10 t a = -40 n c to +125 n c 100 input capacitance c in 0.4 pf common-mode rejection ratio cmrr v cm = -0.1v to (v dd + 0.1v) 75 90 db open-loop gain a ol 0.4v p v out p v dd - 0.4v, r out = 10k i 100 115 db 0.4v p v out p v dd - 0.4v, r out = 600 i 91 100 0.4v p v out p v dd - 0.4v, r out = 32 i 80 output short-circuit current i sc to v dd or v ss 85 ma
????????????????????????????????????????????????????????????????? maxim integrated products 3 MAX44280 1.8v, 50mhz, low-offset, low-power, rail-to-rail i/o op amp note 2: all devices are 100% production tested at t a = +25 n c. temperature limits are guaranteed by design. electrical characteristics (continued) (v dd = 3.3v, v ss = 0v, v in+ = v in- = v dd /2, r l = 10k i to v dd /2, v shdn = v dd , t a = -40 n c to +125 n c. typical values are at t a = +25 n c, unless otherwise noted.) (note 2) parameter symbol conditions min typ max units output voltage swing v ol - v ss r out = 10k i 20 mv r out = 600 i 50 r out = 32 i 400 700 v dd - v oh r out = 10k i 10 r out = 600 i 40 r out = 32 i 400 800 ac characteristics input voltage-noise density e n f = 10khz 12.7 nv/ hz input current-noise density i n f = 10khz 1.2 fa/ hz gain-bandwidth product gbwp 50 mhz minimum stable gain a min 5 v/v slew rate sr 30 v/ f s settling time v out = 2v p-p , v dd = 3.3v, a v = 5v/v, c l = 30pf (load), settle to 0.01% 0.6 s capacitive load c load no sustained oscillation, 5v/v 80 pf no sustained oscillation, 10v/v 500 total harmonic distortion thd f = 10khz, v o = 2v p-p , a v = 5v/v, r out = 10k i -110 db output transient recovery time d v out = 0.2v, v dd = 3.3v , a v = 5v/v; r s = 20?, c l = 1nf (load) 1 s power-supply characteristics power-supply range v dd guaranteed by psrr 1.8 5.5 v t a = 0 n c to +70 n c 1.7 5.5 power-supply rejection ratio psrr v cm = v dd /2 82 95 db quiescent current i dd 750 1200 a shutdown supply current i shdn 1 a shutdown input low v il 0.7 v shutdown input high v ih 1.3 v output leakage current in shutdown i shdn 100 pa shutdown input bias current i il /i ih 1 a shutdown turn-on time t shdn 15 s turn-on time t on 10 ms
????????????????????????????????????????????????????????????????? maxim integrated products 4 typical operating characteristics (v dd = 3.3v, v ss = 0v, v in+ = v in- = v dd /2, r l = 10k i to v dd /2, v shdn = v dd , t a = -40 n c to +125 n c. typical values are at t a = +25 n c, unless otherwise noted. all devices are 100% production tested at t a = +25 n c. temperature limits are guaranteed by design.) input offset voltage vs. common-mode voltage MAX44280 toc01 common-mode voltage (v) input offset voltage (v) 3.0 2.5 2.0 1.5 1.0 0.5 0 -40 -20 0 20 40 60 -60 -0.5 3.5 t a = +125c t a = +25c t a = -40c input offset drift histogram MAX44280 toc04 input offset drift (v/c) percent occurrence (%) 2 4 6 8 10 12 14 16 18 0 -2 -1.8 -1.5 -1.3 -1 -0.8 -0.5 -0.3 0 0.25 0.50 0.75 1.00 1.25 input offset voltage vs. supply voltage MAX44280 toc02 supply voltage (v) input offset voltage (v) 5.0 4.5 3.5 4.0 2.5 3.0 2.0 -80 -60 -40 -20 0 20 40 60 80 100 -100 1.5 5.5 t a = +125c t a = +25c t a = -40c input bias current vs. common-mode voltage MAX44280 toc05 common-mode voltage (v) input bias current (pa) 3.0 2.5 1.5 2.0 0.5 1.0 0 -80 -60 -40 -20 0 20 40 60 80 100 -100 -0.5 3.5 t a = +85c t a = -40c t a = +125c t a = +25c input v os histogram MAX44280 toc03 input offset voltage (v) percent occurrence (%) 5 10 15 20 25 0 -15 -10 -5 05 10 15 20 25 output voltage low vs. output sink current (v ol - v ee , v cc = 1.8v) MAX44280 toc06 output sink current (ma) output voltage low (mv) 10 1 20 40 60 80 100 120 140 160 180 200 0 0.1 100 t a = +125c t a = +25c t a = -40c MAX44280 1.8v, 50mhz, low-offset, low-power, rail-to-rail i/o op amp
????????????????????????????????????????????????????????????????? maxim integrated products 5 typical operating characteristics (continued) (v dd = 3.3v, v ss = 0v, v in+ = v in- = v dd /2, r l = 10k i to v dd /2, v shdn = v dd , t a = -40 n c to +125 n c. typical values are at t a = +25 n c, unless otherwise noted. all devices are 100% production tested at t a = +25 n c. temperature limits are guaranteed by design.) output voltage low vs. output sink current (v ol - v ee , v cc = 3.3v) MAX44280 toc07 output sink current (ma) output voltage low (mv) 10 1 20 40 60 80 100 120 140 160 180 200 0 0.1 100 t a = +125c t a = +25c t a = -40c output voltage high vs. output source current (v cc - v oh , v cc = 3.3v) MAX44280 toc10 output source current (ma) output voltage high (mv) 10 1 20 40 60 80 100 120 140 160 180 200 0 0.1 100 t a = +25c t a = +125c t a = -40c output voltage low vs. output sink current (v ol - v ee , v cc = 5v) MAX44280 toc08 output sink current (ma) output voltage low (mv) 10 1 20 40 60 80 100 120 140 160 180 200 0 0.1 100 t a = +125c t a = -40c t a = +25c output voltage high vs. output source current (v cc - v oh , v cc = 5v) MAX44280 toc11 output source current (ma) output voltage high (mv) 10 1 20 40 60 80 100 120 140 160 180 200 0 0.1 100 t a = +25c t a = +125c t a = -40c output voltage high vs. output source current (v cc - v oh , v cc = 1.8v) MAX44280 toc09 output source current (ma) output voltage high (mv) 10 1 20 40 60 80 100 120 140 160 180 200 0 0.1 100 t a = +25c t a = +125c t a = -40c supply current vs. supply voltage MAX44280 toc12 supply voltage (v) supply current (a) 5.0 4.5 4.0 3.5 3.0 2.5 2.0 650 700 750 800 850 900 600 1.5 5.5 t a = -40c t a = +125c t a = +25c MAX44280 1.8v, 50mhz, low-offset, low-power, rail-to-rail i/o op amp
????????????????????????????????????????????????????????????????? maxim integrated products 6 typical operating characteristics (continued) (v dd = 3.3v, v ss = 0v, v in+ = v in- = v dd /2, r l = 10k i to v dd /2, v shdn = v dd , t a = -40 n c to +125 n c. typical values are at t a = +25 n c, unless otherwise noted. all devices are 100% production tested at t a = +25 n c. temperature limits are guaranteed by design.) shutdown supply current vs. supply voltage (v shdn = v ee ) MAX44280 toc13 supply voltage (v) shutdown supply current (a) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 5.5 t a = -40c t a = +125c t a = +25c power-supply rejection ratio vs. frequency MAX44280 toc16 frequency (khz) psrr (db) 10k 1k 100 10 1 0.1 -100 -80 -60 -40 -20 0 -120 0.01 100k open-loop gain vs. frequency MAX44280 toc14 frequency (khz) open-loop gain (db) 10k 1k 100 10 1 0.1 20 40 60 80 100 120 140 0 0.01 100k dc cmrr and psrr vs. temperature MAX44280 toc17 temperature (c) rejection ratio (db) 100 75 50 25 0 -25 -98 -96 -94 -92 -90 -100 -50 125 dc cmrr dc psrr common-mode rejection ratio vs. frequency MAX44280 toc15 frequency (khz) cmrr (db) -100 -80 -60 -40 -20 0 -120 10k 1k 100 10 1 0 0.01 100k input voltage-noise density vs. frequency MAX44280 toc18 frequency (khz) input-voltage noise density (nv/hz) 1k 100 10 1 0.1 50 100 150 200 250 300 350 400 450 500 0 0.01 10k MAX44280 1.8v, 50mhz, low-offset, low-power, rail-to-rail i/o op amp
????????????????????????????????????????????????????????????????? maxim integrated products 7 typical operating characteristics (continued) (v dd = 3.3v, v ss = 0v, v in+ = v in- = v dd /2, r l = 10k i to v dd /2, v shdn = v dd , t a = -40 n c to +125 n c. typical values are at t a = +25 n c, unless otherwise noted. all devices are 100% production tested at t a = +25 n c. temperature limits are guaranteed by design.) 0.1hz to 10hz output-voltage noise MAX44280 toc19 0.5v/div 4s /div total harmonic distortion vs. frequency (v out = 2v p-p ) MAX44280 toc22 frequency (hz) total harmonic distortion (db) 100k 10k 10 100 1k -115 -110 -105 -100 -95 -90 -85 -80 -120 11 g v cc = 5.5v v cc = 3.3v input current-noise density vs. frequency MAX44280 toc20 frequency (hz) input-current noise density (fa/hz) 10k 1000 100 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 10 100k small-signal transient response (a v = 5v/ v, r f = 4ki , r g = 1ki ) MAX44280 toc23 input 20mv/div v cc /2 output 50mv/div v cc /2 100ns /div total harmonic distortion vs. input amplitude (f = 10khz, v cc = 5.5v, a v = 5v/v) MAX44280 toc21 output amplitude (v) thd (db) 4.5 4.0 0.5 1.0 1.5 2.5 3.0 2.0 3.5 -115 -110 -105 -100 -95 -90 -85 -80 -120 0 5.0 large-signal transient response (a v = 5v/v , r f = 4ki , r g = 1ki ) MAX44280 toc24 input 100mv/div output 500mv/div 100ns /div MAX44280 1.8v, 50mhz, low-offset, low-power, rail-to-rail i/o op amp
????????????????????????????????????????????????????????????????? maxim integrated products 8 typical operating characteristics (continued) (v dd = 3.3v, v ss = 0v, v in+ = v in- = v dd /2, r l = 10k i to v dd /2, v shdn = v dd , t a = -40 n c to +125 n c. typical values are at t a = +25 n c, unless otherwise noted. all devices are 100% production tested at t a = +25 n c. temperature limits are guaranteed by design.) percent overshoot vs. resistive load (v in = 100mv p-p ) MAX44280 toc25 resistance (i) overshoot (%) 10k 1k 2 4 6 8 10 12 14 0 100 100k power-up time MAX44280 toc28 v cc 2v/div output 500mv/div gnd gnd 4ms /div turn-on time from shutdown MAX44280 toc29 output 500mv/div v ss v ss 10s /div shdn 2v/div stability vs. capacitive load and isolation resistance (r load in series c load ) MAX44280 toc26 capacitive load (pf) isolation resistance () 3500 3000 2500 2000 1500 1000 500 10 20 30 40 50 60 0 0 4000 unstable stable stable unstable gain = 10v/v gain = 5v/v stability vs. capacitive and resistive load (r load || c load ) MAX44280 toc27 capacitive load (pf) resistive load () 1000 10 100 1000 10,000 100,000 1 100 10,000 unstable stable stable unstable gain = 10v/v gain = 5v/v MAX44280 1.8v, 50mhz, low-offset, low-power, rail-to-rail i/o op amp
????????????????????????????????????????????????????????????????? maxim integrated products 9 MAX44280 1.8v, 50mhz, low-offset, low-power, rail-to-rail i/o op amp pin description pin configurations pin name function 1 in+ positive input 2 v ss negative power supply. bypass with a 0.1 f f capacitor to ground. 3 in- negative input 4 out output 5 shdn active-low shutdown 6 v dd positive power supply. bypass with a 0.1 f f capacitor to ground. top view sc70 v ss 2 in+ 1 in- 3 shdn 5 v dd 6 out 4 MAX44280 + 12 3 65 4 v dd out shdn in+ + in- v ss thin dfn (ultra-thin lga) MAX44280
???????????????????????????????????????????????????????????????? maxim integrated products 10 MAX44280 1.8v, 50mhz, low-offset, low-power, rail-to-rail i/o op amp detailed description the MAX44280 is a high-speed low-power op amp ideal for signal processing applications due to the devices high precision and low-noise cmos inputs. the device self-calibrates on power-up to eliminate effects of tem - perature and power-supply variation. the MAX44280 also features a low-power shutdown mode that greatly reduces quiescent current while the device is not operational and recovers in 30s. crossover distortion this op amp features a low-noise integrated charge pump that creates an internal voltage rail 1v above v dd, which is used to power the input differential pair of pmos transistors as shown in figure 1 . such a unique architecture eliminates crossover distor - tion common in traditional cmos input architecture ( figure 2 ), especially when used in a noninverting configuration, such as for sallen-key filters. the charge pumps operating frequency lies well above the unity-gain frequency of the amplifier. thanks to its high- frequency operation and ultra-quiet circuitry, the charge pump generates little noise, does not require external components, and is entirely transparent to the user. figure 1. comparing the input structure of the MAX44280 to standard op-amp inputs figure 2. crossover distortion of typical amplifiers standard input structure MAX44280 inputs structure internal charge pump crossover distortion MAX44280 time amplifier output
???????????????????????????????????????????????????????????????? maxim integrated products 11 MAX44280 1.8v, 50mhz, low-offset, low-power, rail-to-rail i/o op amp applications information power-up autotrim the ic features an automatic trim that self-calibrates the v os of this device to less than 50 f v of input offset voltage on power-up. this self-calibration feature allows the device to eliminate input offset voltage effects due to power supply and operating temperature variation simply by cycling its power. the autotrim sequence takes approximately 10ms to complete and is triggered by an internal power-on-reset (por) circuitry. during this time, the inputs and outputs are put into high impedance and left unconnected. shutdown operation the MAX44280 features an active-low shutdown mode that puts both inputs and outputs into high impedance and substantially lowers the quiescent current to less than 1 f a. putting the output into high impedance allows multiple outputs to be multiplexed onto a single output line without the additional external buffers. the device does not self-calibrate when exiting shutdown mode and retains its power-up trim settings. the device also recovers from shutdown in under 30 f s. the shutdown logic levels of the device is independent of supply, allowing the shutdown feature of the device to operate off of a 1.8v or 3.3v microcontroller, regardless of supply voltage. rail-to-rail input/output the input voltage range of the ic extends 100mv above v dd and below v ss . the wide input common-mode voltage range allows the op amp to be used as a buf - fer and as a differential amplifier in a wide-variety of signal processing applications. output voltage high/low is designed to be only 50mv above v ss and below v dd allowing maximum dynamic range in single-supply appli - cations. the high output current and capacitance drive capability of the device make it ideal as an adc driver and a line driver. input bias current the ic features a high-impedance cmos input stage and a specialized esd structure that allows low-input bias current operation at low-input, common-mode volt - ages. low-input bias current is useful when interfacing with high-ohmic sensors. it is also beneficial for design - ing transimpedance amplifiers for photodiode sensors. this makes the device ideal for ground-referenced medi - cal and industrial sensor applications. active filters the MAX44280 is ideal for a wide variety of active filter circuits that makes use of the wide bandwidth, rail-to-rail input/output stages and high-impedance cmos inputs. driver for interfacing with the max11645 adc the ics tiny size and low noise make it a good fit for driv - ing 12- to 16-bit resolution adcs in space-constrained applications. the typical application circuit shows the MAX44280 amplifier output connected to a lowpass filter driving the max11645 adc. the max11645 is part of a family of 3v and 5v, 12-bit and 10-bit, 2-channel adcs. the max11645 offers sample rates up to 94ksps and measures two single-ended inputs or one differential input. these adcs dissipate 670 f a at the maximum sam - pling rate, but just 6 f a at 1ksps and 0.5 f a in shutdown. offered in the ultra-tiny, 1.9mm x 2.2mm wlp and f max- 8 packages, the max11645 adcs are an ideal fit to pair with the MAX44280 amplifier in portable applications. where higher resolution is required, refer to the max1069 (14-bit) and max1169 (16-bit) adc families.
???????????????????????????????????????????????????????????????? maxim integrated products 12 MAX44280 1.8v, 50mhz, low-offset, low-power, rail-to-rail i/o op amp ordering information + denotes a lead(pb)-free/rohs-compliant package. chip information process: bicmos part temp range pin-package top mark MAX44280axt+ -40 n c to +125 n c 6 sc70 +aed MAX44280ayt+ -40 n c to +125 n c 6 thin f dfn (ultra-thin lga) +az
???????????????????????????????????????????????????????????????? maxim integrated products 13 MAX44280 1.8v, 50mhz, low-offset, low-power, rail-to-rail i/o op amp package information for the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. package type package code outline no. land pattern no. 6 sc70 x6sn+1 21-0077 90-0189 6 thin f dfn (ultra-thin lga) y61a1+1 21-0190 90-0233
???????????????????????????????????????????????????????????????? maxim integrated products 14 MAX44280 1.8v, 50mhz, low-offset, low-power, rail-to-rail i/o op amp package information (continued) for the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status.
???????????????????????????????????????????????????????????????? maxim integrated products 15 MAX44280 1.8v, 50mhz, low-offset, low-power, rail-to-rail i/o op amp package information (continued) for the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status.
maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 16 ? 2012 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. revision history revision number revision date description pages changed 0 12/11 initial release 1 4/12 updated package thermal characteristics , electrical characteristics , and ordering information . 2, 3, 12 MAX44280 1.8v, 50mhz, low-offset, low-power, rail-to-rail i/o op amp

▲Up To Search▲

Price & Availability of MAX44280

	To Download MAX44280 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .