rail-to-rail output jfet input instrumentation preliminary technical data AD8220 rev. pra information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. specifications subject to change without notice. no license is granted by implication or otherwise under any patent or patent rights of analog devices. trademarks and registered trademarks are the property of their respective owners. one technology way, p.o. box 9106, norwood, ma 02062-9106, u.s.a. tel: 781.329.4700 www.analog.com fax: 781.461.3113 ?2005 analog devices, inc. all rights reserved. features high accuracy dc performance 90 db cmrr (g = 1), typ 4pa typ input bias current 1 na max input bias current over temperature 2 uv/c typ input offset voltage drift excellent ac specificatons 80 db min cmrr to 10 khz ( g = 1), typ 1.75 mhz C3db bandwidth (g=1) low settling time versatile rail-to-rail output 700 a quiscent supply current (typ) available in space-saving msop package gain set with one resistor (gain range 1 to 1000) 2.3 v to 18 v dual supplies +4.6 v to +36 v single supply specified over C40c to +85c applications medical instrumentation precision data acquisition systems transducer interfaces connection diagram AD8220 top view (not to scale) -in 1 rg 2 rg 3 +in 4 5 +vs vout vref -vs 8 7 6 figure 1. msop connection diagram general description the AD8220 is a gain programmable, high performance instru- mentation amplifier that draws a typical input bias current of 4pa and rejects high frequency common mode signals. the cmrr of instrumentation amplifiers on the market today falls off at 200 hz. in contrast, the AD8220 maintains a cmrr of 80 db over an extended frequency at g = 1. the combination of extremely high input impedance and high cmrr over frequency makes the AD8220 useful in applications such as patient monitoring where input impedance is high and high frequency disturbances must be rejected. the rail to rail output, low power consumption and small msop package make this precision instrumentation amplifier attractive for use in multi-channel applications. programmable gain affords the user design flexibility. a single resistor sets the gain from 1 to 1000. the AD8220 operates on both single and dual supplies and is well suited for situations where 10 v input voltages are encountered. in addition its rail to rail output stage allows for maximum dynamic range when constrained by low single supply voltages. performance is specified over the entire industrial temperature range of C40c to +85c. ( datasheet : )
AD8220 preliminary technical data rev. pra | page 2 of 8 table of contents features .............................................................................................. 1 applications ....................................................................................... 1 connection diagram ....................................................................... 1 general description ......................................................................... 1 revision history ............................................................................... 2 specifications .....................................................................................3 absolute maximum ratings ............................................................6 thermal characteristics ...............................................................6 esd caution ...................................................................................6 outline dimesions ............................................................................7 revision history 8/05revision pra: preliminary version
preliminary technical data AD8220 rev. pra | page 3 of 8 specifications v s = 5, 15 v, v ref = 0 v, t a = +25c, g = 1, r l = 2 k, unless otherwise noted. table 1. arm grade parameter min typ max unit conditions common-mode rejection ratio (cmrr) cmrr dc to 60 hz with 1 k source imbalance v cm = C10 v to +10 v g = 1 90 db g = 10 110 db g = 100 116 db g = 1000 116 db cmrr at 10 khz v cm = C10 v to +10 v g = 1 80 db g = 10 100 db g = 100 116 db g = 1000 116 db noise rti nois e = e ni 2 + ( e no / g ) 2 voltage noise, 1 khz input voltage noise, e ni 15 nv/hz v in+ , v inC , v ref = 0 output voltage noise, e no 100 nv/hz rti f = 0.1 hz to 10 hz g = 1 v p-p g = 10 v p-p g = 100 to 1000 v p-p current noise 1 fa/hz f = 1 khz 6 pa p-p f = 0.1 hz to 10 hz voltage offset 1 input offset, v osi 0.2 1 mv v s = 15 v over temperature 1.6 mv v s = 15 v ; t = C40c to +85c average tc 2 10 v/c v s = 15 v output offset, v oso 1 mv v s = 5 v to 15 v over temperature 1.6 mv t = C40c to +85c average tc 10 v/c offset rti vs. supply (psr) v s = 2.5 v to 15 v g = 1 80 90 db g = 10 95 110 db g = 100 110 130 db g = 1000 110 130 db input current input bias current 4 20 pa over temperature 1 na t = C40c to +85c average tc pa/c input offset current 5 pa over temperature 1 na t = C40c to +85c average tc 1 pa/c reference input r in 40 k i in 50 a v in+ , v inC , v ref = 0 voltage range Cv s +v s v gain to output 1 0.0001 v/v
AD8220 preliminary technical data rev. pra | page 4 of 8 arm grade parameter min typ max unit conditions power supply operating range 2.3 18 v v s = 2.3 v to 18 v quiescent current 700 a over temperature 1,000 a t = C40c to +85c dynamic response small signal C3 db bandwidth g = 1 1,800 khz g = 10 1,000 khz g = 100 120 khz g = 1000 12 khz settling time 0.01% 10 v step g = 1 to 10 5 s g = 100 12 s g = 1000 100 settling time 0.001% 10 v step g = 1 to 100 s g = 1000 s slew rate 1.7 2 v/s g = 1 2 2.5 v/s g = 5 to 100 gain g = 1 + 49.4 k/rg gain range 1 1,000 v/v gain error v out 10 v g = 1 0.10 0.30 % g = 10 0.10 0.30 % g = 100 0.10 0.30 % g = 1000 0.10 0.30 % gain nonlinearity v out = ?10 v to +10 v g = 1 5 10 ppm r l = 10 k g = 10 ppm r l = 10 k g = 100 ppm r l = 10 k g = 1 to 100 ppm r l = 2 k gain vs. temperature g = 1 3 10 ppm/c g > 1 2 ?50 ppm/c input input impedance differential 1000||6 g||pf common mode 1000||12 g||pf input operating ?v s +v s ? 2.5 v v s = 2.3 v to 5 v voltage range 3 over temperature v t = ?40c to +85c input operating ?v s + 0.2 +v s ? 2.5 v v s = 5 v to 18 v voltage range over temperature v t = ?40c to +85c overload recovery s output r l = 10 k output swing ?v s + 0.1 ?v s ? 0.1 v v s = 2.3 v to 5 v over temperature ?v s + 0.1 ?v s ? 0.1 v t = ?40c to +85c
preliminary technical data AD8220 rev. pra | page 5 of 8 arm grade parameter min typ max unit conditions output swing ?v s + 0.1 ?v s ? 0.1 v v s = 5 v to 18 v over temperature ?v s + 0.1 ?v s ? 0.1 v t = ?40c to +85c capacitance load drive 300 pf short-circuit current 20 ma temperature range specified performance ?40 +85 c tbd specified performance ?40 +125 c 1 total rti v os = (v osi ) + (v oso /g). 2 does not include the effects of external resister r g . 3 one input grounded. g = 1.
AD8220 preliminary technical data rev. pra | page 6 of 8 absolute maximum ratings table 2. parameter rating supply voltage 18 v internal power dissipation output short circuit current input voltage (common-mode) v s differential input voltage v s storage temperature ?65c to +150c stresses above those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. thermal characteristics specification is for device in free air. table 3. package type ja 1 unit msop 135 c/w 1 4-layer jedec board. esd caution esd (electrostatic discharge) sensitive device. electros tatic charges as high as 4000 v readily accumulate on the human body and test equipment and can discharge wi thout detection. although this product features proprietary esd protection circuitry, permanent dama ge may occur on devices subjected to high energy electrostatic discharges. therefore, proper esd pr ecautions are recommended to avoid performance degradation or loss of functionality.
preliminary technical data AD8220 rev. pra | page 7 of 8 outline dimesions 0.80 0.60 0.40 8 0 85 4 1 4.90 bsc pin 1 0.65 bsc 3.00 bsc seating plane 0.15 0.00 0.38 0.22 1.10 max 3.00 bsc coplanarity 0.10 0.23 0.08 compliant to jedec standards mo-187aa figure 2. 8-lead mini small outline package [msop] (rm-8) dimensions shown in millimeters
AD8220 preliminary technical data rev. pra | page 8 of 8 t notes ?2005 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d03579-0-8/05(pra) ttt
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