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high-speed, precision difference amplifier (g = 1) ? 1999 burr-brown corporation pds-1482b printed in u.s.a. march, 1999 features l designed for low cost l low offset voltage: 750 m v max l low offset drift: 2 m v c l low gain error: 0.05% max l wide bandwidth: 3mhz l high slew rate: 14v/ m s l fast settling time: 3 m s to 0.01% l wide supply range: 4v to 18v l low quiescent current: 2.4ma l so-8 surface-mount package INA154 description the INA154 is a high slew rate, unity-gain difference amplifier consisting of a precision op amp with a precision resistor network. the on-chip resistors are laser trimmed for accurate gain and high common- mode rejection. excellent tcr tracking of the resis- tors maintains gain accuracy and common-mode re- jection over temperature. the input common-mode voltage range extends beyond the positive and nega- tive supply rails. it operates on 4v to 18v supplies. the difference amplifier is the foundation of many commonly used circuits. the INA154 provides this circuit function without using an expensive precision resistor network. the INA154 is available in a so-8 surface-mount package and is specified for operation over the extended industrial temperature range, C40 c to +85 c. applications l differential input amplifier l instrumentation amplifier building block l unity-gain inverting amplifier l summing amplifier l differential current receiver l volta ge-co ntrolled current source l synchronous demodulator international airport industrial park ? mailing address: po box 11400, tucson, az 85734 ? street address: 6730 s. tucson bl vd., tucson, az 85706 ? tel: (520) 746-1111 twx: 910-952-1111 ? internet: http://www.burr-brown.com/ ? cable: bbrcorp ? telex: 066-6491 ? fax: (520) 889-1510 ? i mmediate product info: (800) 548-6132 2 3 4 ?n +in v 25k w 25k w 25k w 25k w 5 1 sense ref 6 output 7 v+ INA154 for most current data sheet and other product information, visit www.burr-brown.com sbos104
2 INA154 specifications: v s = 15v at t a = +25 c, v s = 15v, r l = 2k w connected to ground, and reference pin connected to ground, unless otherwise noted. the information provided herein is believed to be reliable; however, burr-brown assumes no responsibility for inaccuracies or o missions. burr-brown assumes no responsibility for the use of this information, and all use of such information shall be entirely at the users own risk. pr ices and specifications are subject to change without notice. no patent rights or licenses to any of the circuits described herein are implied or granted to any third party. burr-brown does not authorize or warrant any burr-brown product for use in life support devices and/or systems. INA154u INA154ua parameter conditions min typ max min typ max units offset voltage (1) rto initial 100 750 ] 1500 m v vs temperature 2 20 ]] m v/ c vs power supply v s = 4v to 18v 5 60 ]] m v/v vs time 0.5 ] m v/mo input impedance (2) differential 50 ] k w common-mode 50 ] k w input voltage range common-mode voltage range positive v o = 0v 2(v+) C 5 2(v+) C 4 ]] v negative v o = 0v 2(vC) + 5 2(vC) + 2 ]] v common-mode rejection ratio v cm = C25v to 25v, r s = 0 w 80 90 74 ] db output voltage noise (3) rto f = 0.1hz to 10hz 2.6 ] m vp-p f = 1khz 52 ] nv/ ? hz gain initial 1 ] v/v error v o = C13v to +13v 0.02 0.05 ] 0.1 % vs temperature 1 10 ]] ppm/ c nonlinearity v o = C13v to +13v 0.0001 0.001 ] 0.002 % of fs output voltage, positive (v+) C 2 (v+) C 1.8 ]] v negative (vC) + 2 (vC) + 1.6 ]] v current limit, continuous to common 60 ] ma capacitive load (stable operation) 500 ] pf frequency response small-signal bandwidth C3db 3.1 ] mhz slew rate 14 ] v/ m s settling time: 0.1% 10v step, c l = 100pf 2 ] m s 0.01% 10v step, c l = 100pf 3 ] m s overload recovery time 50% overdrive 3 ] m s power supply rated voltage 15 ] v operating voltage range 4 18 ]] v quiescent current i o = 0ma 2.4 2.9 ]] ma temperature range specified C40 +85 ]] c operation C55 +125 ]] c storage C55 +125 ]] c thermal resistance, q ja so-8 surface-mount 150 ] c/w ] specifications the same as INA154u. notes: (1) includes effects of amplifiers input bias and offset currents. (2) 25k w resistors are ratio matched but have 20% absolute value. (3) includes effects of amplifiers input current noise and thermal noise contribution of resistor network.
3 INA154 pin configuration top view so-8 supply voltage, v+ to vC .................................................................... 40v input voltage range ......................................................................... 80v output short circuit (to ground) ............................................. continuous operating temperature .................................................. C55 c to +125 c storage temperature ..................................................... C55 c to +125 c junction temperature .................................................................... +150 c lead temperature (soldering, 10s) ............................................... +300 c note: (1) stresses above these ratings may cause permanent damage. exposure to absolute maximum conditions for extended periods may degrade device reliability. absolute maximum ratings (1) electrostatic discharge sensitivity this integrated circuit can be damaged by esd. burr-brown recommends that all integrated circuits be handled with ap- propriate precautions. failure to observe proper handling and installation procedures can cause damage. esd damage can range from subtle performance degradation to complete device failure. precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. package specified drawing temperature package ordering transport product package number (1) range marking number (2) media INA154u so-8 surface-mount 182 C40 c to +85 c INA154u INA154u rails " " " " " INA154u/2k5 tape and reel INA154ua so-8 surface-mount 182 C40 c to +85 c INA154ua INA154ua rails " " " " " INA154ua/2k5 tape and reel notes: (1) for detailed drawing and dimension table, please see end of data sheet, or appendix c of burr-brown ic data book. (2 ) models with a slash (/) are available only in tape and reel in the quantities indicated (e.g., /2k5 indicates 2500 devices per reel). ordering 2500 pieces of INA154u/2k5 will get a single 2500-piece tape and reel. for detailed tape and reel mechanical information, refer to appendix b of burr-brown ic data book. package/ordering information ref ?n +in v nic v+ output sense 1 2 3 4 8 7 6 5 nc = no internal connection
4 INA154 typical performance curves at t a = +25 c and v s = 15v, unless otherwise noted. gain vs frequency frequency (hz) voltage gain (db) 1k 10k 100k 1m 10m 10 0 ?0 ?0 ?0 common-mode rejection ratio vs frequency frequency (hz) common-mode rejection ratio (db) 1k 10k 100k 1m 100 80 60 40 20 0 power supply rejection ratio vs frequency frequency (hz) power supply rejection ratio (db) 100 1k 10k 100k 1m 120 100 80 60 40 20 0 ?srr +psrr maximum output voltage vs frequency frequency (hz) output voltage (vp-p) 100 1k 10k 100k 1m 10m 40 30 20 10 0 input common-mode voltage range vs output voltage output voltage (v) common-mode voltage (v) ?0 ?5 ?0 ? 0 5 10 15 20 40 30 20 10 0 ?0 ?0 ?0 ?0 ?0 v ref = 0v r l = 2k w v s = 15v total harmonic distortion + noise vs frequency frequency (hz) thd+noise (%) 20 100 1k 10k 20k 1 0.1 0.010 0.001 0.0001 v o = 10vrms r l = 600 w r l = 100k w r l = 2k w
5 INA154 typical performance curves (cont) at t a = +25 c, and v s = 15v, unless otherwise noted. quiescent current vs temperature temperature ( c) quiescent current (ma) ?5 ?0 ?5 0 25 50 75 100 125 4 3 2 1 0 slew rate vs temperature temperature ( c) slew rate (v/ s) ?5 ?0 ?5 0 25 50 75 100 +sr 125 16 14 12 10 8 ?r short-circuit current vs temperature temperature ( c) short-circuit current (ma) ?5 ?0 ?5 0 25 50 75 100 125 80 60 40 20 0 ?0 ?0 ?0 ?0 +i sc ? sc output voltage noise spectral density vs frequency frequency (hz) voltage noise (nv/ ? hz) 1 10 100 1k 10k 100k 1m 10k 1k 100 10 output noise voltage vs noise bandwidth frequency (hz) noise voltage ( vrms) 1 10 100 1k 10k 100k 100 10 1 0.1 output voltage swing vs output current 14 13 12 11 10 9 ? ?0 ?1 ?2 ?3 ?4 0 20 40 60 80 100 output current (ma) output voltage swing (v) ?5 c ?5 c 25 c 85 c 85 c 125 c 125 c 25 c
6 INA154 typical performance curves (cont) at t a = +25 c, and v s = 15v, unless otherwise noted. small-signal step response 1 m s/div 50mv/div large-signal step response 1 m s/div 5v/div c l = 100pf c l = 500pf small-signal overshoot vs load capacitance load capacitance (pf) overshoot (%) 0 400 800 1200 1600 2000 70 60 50 40 30 20 10 0 r l = 2k w 100mv step offset voltage production distribution percent of units (%) offset voltage ( v) ?000 ?00 ?00 ?00 ?00 ?00 ?00 ?00 ?00 ?00 0 100 200 300 400 500 600 700 800 900 1000 25 20 15 10 5 0 typical production distribution of packaged units. offset voltage drift production distribution percent of units (%) offset voltage drift ( v/ c) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 25 20 15 10 5 0 typical production distribution of packaged units. c l = 500pf
7 INA154 applications information figure 1 shows the basic connections required for operation of the INA154. decoupling capacitors are strongly recom- mended in applications with noisy or high impedance power supplies. the capacitors should be placed close to the device pins as shown in figure 1. as shown in figure 1, the output is referred to the reference terminal (pin 1). a voltage applied to this pin will be summed with output signal. the differential input signal is connected to pins 2 and 3. the source impedances con- nected to the pinouts must be nearly equal to assure good common-mode rejection. a 5 w mismatch in source imped- ance will degrade the common-mode rejection of a typical device to approximately 80db (a 10 w mismatch degrades cmr to 74db). if the source has a known impedance mismatch, an additional resistor in series with the opposite input can be used to preserve good common-mode rejection. do not interchange pins 1 and 3 or pins 2 and 5, even though nominal resistor values are equal. the resistors are laser trimmed for precise resistor ratios to achieve accurate gain and highest cmr. interchanging these pins would not provide specified performance. operating voltage the INA154 operates from 4v to 18v supplies with excellent performance. most behavior remains unchanged throughout the full operating voltage range. parameters which vary significantly with operating voltage are shown in the typical performance curves. input voltage range the INA154 can accurately measure differential signals that are beyond the positive or negative power supply rails. the linear common-mode range extends from 2?(v+) C 5v to 2?(vC) +5v. see the typical performance curve, input common-mode range vs output voltage. offset voltage trim the INA154 is laser trimmed for low offset voltage and drift. most applications require no external offset adjust- ment. figure 2 shows an optional circuit for trimming the output offset voltage. the output is referred to the output reference terminal (pin 1), which is normally grounded. a voltage applied to the ref terminal will be summed with the output signal. this can be used to null offset voltage as shown in figure 2. the source impedance of a signal applied to the ref terminal should be less than 10 w to maintain good common-mode rejection. figure 1. basic power supply and signal connections. v 3 5 6 3 v o INA154 v o = v 3 v 2 offset adjustment range = 1v 2 r 3 r 1 r 2 r 4 v 2 10 w 150k w 10 w 100k w +15v ?5v 1 figure 2. offset adjustment. v 3 5 6 3 INA154 v out = v 3 v 2 2 ref r 1 25k w r 3 25k w r 2 25k w r 4 v 2 25k w r l 1 f v 4 1 f v+ 7 1
8 INA154 the INA154 can be combined with op amps to form a complete instru- mentation amplifier with specialized performance characteristics. burr- brown offers many complete high performance ias. products with related performances are shown at the right. similiar complete a 1 , a 2 feature burr-brown ias opa227 low noise ina103 opa129 ultra low bias current (fa) ina116 opa277 low offset drift, low noise ina114, ina128 opa2134 fet input (pa) ina111, ina121 figure 5. boosting output current. figure 6. pseudoground generator. figure 4. precision instrumentation amplifier. 5 6 1 3 INA154 2 v 1 v o a 2 a 1 r 2 r 2 r 1 ?n v 2 +in v o = (1 + 2r 2 /r 1 ) (v 2 ? 1 ) v 1 v 2 5 6 1 3 v 0 = v 1 + v 2 INA154 2 figure 3. precision summing amplifier. 5 6 1 INA154 buf634 2 3 v o r l ?n +in (low i q mode) buf634 inside feedback loop contributes no error. 5 6 2 (v+)/2 INA154 v+ 1 7 4 v+ ground ground 3
9 INA154 figure 7. precision voltage-to-current conversion. the difference amplifier is a highly versatile building block that is useful in a wide variety of applications. see the ina105 data sheet for additional applications ideas, including: ? current receiver with compliance to rails ? precision unity-gain inverting amplifier ? 10v precision voltage reference ? 5v precision voltage reference ? precision unity-gain buffer ? precision average value amplifier ? precision g = 2 amplifier (see ina157) ? precision g = 1/2 amplifier (see ina157) ? precision bipolar offsetting ? precision summing amplifier with gain ? instrumentation amplifier guard drive generator ? precision summing instrumentation amplifier ? precision absolute value buffer ? precision voltage-to-current converter with differential inputs ? differential input voltage-to-current converter for low i out ? isolating current source ? differential output difference amplifier ? isolating current source with buffering amplifier for greater accuracy ? window comparator with window span and window center inputs ? precision voltage-controlled current source with buff- ered differential inputs and gain ? digitally controlled gain of 1 amplifier 5 7 6 3 v 3 INA154 2 4 v 2 1 4 2 +15v opa227 ref102 6 10v i o = 4 to 20ma 0v to 10v in 12.5k w 1k w 50k w r load v+ set r 1 = r 2 r 2 50.1 w r 1 50.1 w 2n3904 25k w 25k w 25k w 25k w for 4-20ma applications, the ref102 sets the 4ma low-scale output for 0v input. i o = v 3 ?v 2 + 1 40k w 1 r 2
packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish msl peak temp (3) INA154u active soic d 8 75 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr INA154u/2k5 active soic d 8 2500 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr INA154u/2k5e4 active soic d 8 2500 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr INA154ua active soic d 8 75 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr INA154uag4 active soic d 8 75 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr INA154ug4 active soic d 8 75 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr (1) the marketing status values are defined as follows: active: product device recommended for new designs. lifebuy: ti has announced that the device will be discontinued, and a lifetime-buy period is in effect. nrnd: not recommended for new designs. device is in production to support existing customers, but ti does not recommend using this part in a new design. preview: device has been announced but is not in production. samples may or may not be available. obsolete: ti has discontinued the production of the device. (2) eco plan - the planned eco-friendly classification: pb-free (rohs), pb-free (rohs exempt), or green (rohs & no sb/br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. tbd: the pb-free/green conversion plan has not been defined. pb-free (rohs): ti's terms "lead-free" or "pb-free" mean semiconductor products that are compatible with the current rohs requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. where designed to be soldered at high temperatures, ti pb-free products are suitable for use in specified lead-free processes. pb-free (rohs exempt): this component has a rohs exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. the component is otherwise considered pb-free (rohs compatible) as defined above. green (rohs & no sb/br): ti defines "green" to mean pb-free (rohs compatible), and free of bromine (br) and antimony (sb) based flame retardants (br or sb do not exceed 0.1% by weight in homogeneous material) (3) msl, peak temp. -- the moisture sensitivity level rating according to the jedec industry standard classifications, and peak solder temperature. important information and disclaimer: the information provided on this page represents ti's knowledge and belief as of the date that it is provided. ti bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. efforts are underway to better integrate information from third parties. ti has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ti and ti suppliers consider certain information to be proprietary, and thus cas numbers and other limited information may not be available for release. in no event shall ti's liability arising out of such information exceed the total purchase price of the ti part(s) at issue in this document sold by ti to customer on an annual basis. package option addendum www.ti.com 16-feb-2009 addendum-page 1
tape and reel information *all dimensions are nominal device package type package drawing pins spq reel diameter (mm) reel width w1 (mm) a0 (mm) b0 (mm) k0 (mm) p1 (mm) w (mm) pin1 quadrant INA154u/2k5 soic d 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 q1 package materials information www.ti.com 11-mar-2008 pack materials-page 1
*all dimensions are nominal device package type package drawing pins spq length (mm) width (mm) height (mm) INA154u/2k5 soic d 8 2500 346.0 346.0 29.0 package materials information www.ti.com 11-mar-2008 pack materials-page 2
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