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features swing: to within 200mv of either output rail low offset drift: 3 v/ c low offset voltage: 250 v high cmr: 94db low gain error: 0.01% low gain error drift: 1ppm/ c wide supply range: single: 2.7v to 20v dual: 1.35v to 10v msop-8 package single-supply difference amplifier description the INA152 is a small (msop-8), low-power, unity- gain difference amplifier consisting of a cmos op amp and a precision resistor network. the on-chip resistors are laser trimmed for accurate gain and high common-mode rejection. excellent tcr tracking of the resistor maintains gain accuracy and common- mode rejection over temperature. the input common- mode voltage range extends to above the positive and applications difference input amplifier building block unity-gain inverting amplifier gain = 1/2 amplifier gain = 2 amplifier summing amplifier synchronous demodulator current and differential line receiver voltage-controlled current source battery-powered systems low-cost automotive instrumen- tation negative rails and the output swings to within 50mv of either rail. the difference amplifier is the foundation of many commonly used circuits. the INA152 provides preci- sion circuit function without using an expensive pre- cision network. the INA152 is specified for operation over the ex- tended industrial temperature range, ?0 c to +85 c. INA152 copyright ?2001, texas instruments incorporated sbos184 printed in u.s.a. january, 2001 www.ti.com v in+ v+ v ref 40k ? 40k ? 40k ? 40k ? v in sense v o INA152 2 3 74 1 5 6
INA152 2 sbos184 specifications: v s = 10v INA152ea parameter conditions min typ max units offset voltage rto (1) (2) input offset voltage v cm = 0v 250 1500 v vs temperature t a = 40 c to +85 c 3 15 v/ c vs power supply v s = 1.35v to 10v 5 30 v/v vs time 0.5 v/mo input voltage range (3) common-mode voltage range v in+ v in = 0v 2(v ) 2(v+) 2v common-mode rejection 80 94 db input impedance (4) differential 80 k ? common-mode 80 k ? output noise voltage (1) (5) rto f o = 10hz 97 nv/ hz f o = 1khz 87 nv/ hz f b = 0.1hz to 10hz 2.4 vp-p gain initial (6) 1 v/v gain error 0.01 0.1 % gain temperature drift coefficient 1 10 ppm/ c nonlinearity (v ) + 0.3v < v o < (v+) 0.350v 0.002 0.005 % of fs frequency response small signal 800 khz slew rate 0.4 v/ s settling time, 0.1% 9v step 23 s , 0.01% 9v step 25 s overload recovery 50% overdrive 5 s output voltage r l = 10k ? to gnd (v+) 0.35 (v+) 0.02 v (v ) + 0.3 (v ) + 0.15 v load capacitance stability 500 pf short-circuit curent continuous to common +7, 12 ma power supply rated voltage 10 v voltage range 1.35 10 v 2.7 20 v current, quiescent i o = 0ma 500 650 a temperature range specification 40 +85 c operating 55 +125 c ja , junction to ambient 150 c/w t a = +25 c, v s = 10v, r l = 10k ? connected to ground, and reference pin connected to ground, unless otherwise noted. notes: (1) referred to output in unity-gain difference configuration. note that this circuit has a gain of 2 for the op amp s offset voltage and noise voltage. (2) includes effects of amplifier s input bias and offset currents. (3) limit i in through 40k ? resistors to 1ma. (4) 40k ? resistors are ratio matched but have 20% absolute value. (5) includes effects of amplifier s input current noise and thermal noise contribution of resistor network. (6) connected as difference amplifier. INA152 3 sbos184 INA152ea parameter conditions min typ max units offset voltage rto (1) (2) input offset voltage v cm = v out = 0v 250 1500 v vs temperature t a = 40 c t a 85 c 3 15 v/ c input voltage range (3) voltage range, common-mode v in + v in = 0v 2.5 +5.5 v common-mode rejection 0v < v cm < +5v, r src = 0 ? 80 94 db output voltage (v+) 0.2 v (v ) + 0.2 v r l = 10k ? to gnd (v ) + 0.05 v specifications: v s = +5v t a = +25 c, v s = +5v, ref connected to v s /2, r l = 10k ? connected to v s /2, unless otherwise noted. pin configuration electrostatic discharge sensitivity this integrated circuit can be damaged by esd. burr-brown recommends that all integrated circuits be handled with appropriate 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. top view msop-8 supply voltage, v+ to v .................................................................. +22v signal input terminals .................................................. +20v continuous output short-circuit to gnd duration .................................... continuous operating temperature .................................................. 55 c to +125 c storage temperature ..................................................... 55 c to +125 c junction temperature .................................................................... +150 c lead temperature (soldering, 10s) ............................................... +300 c absolute maximum ratings (1) package specified drawing temperature package ordering transport product package number range marking number (1) media INA152ea msop-8 337 40 c to +85 c b52 INA152ea/250 tape and reel " " " " " INA152ea/2k5 tape and reel note: (1) models with a slash (/) are available only in tape and reel in the quantities indicated (e.g., /2k5 indicates 2500 de vices per reel). ordering 2500 pieces of INA152ea/2k5 will get a single 2500-piece tape and reel. package/ordering information ref v in v in+ v nc v+ v o sense 1 2 3 4 8 7 6 5 INA152 nc = no internal connection notes: (1) referred to output in unity-gain difference configuration. note that this circuit has a gain of 2 for the op amp s offset voltage and noise voltage. (2) includes effects of amplifier s input bias and offset currents. (3) limit i in through 40k ? resistors to 1ma. INA152 4 sbos184 typical performance curves at t a = +25 c, v s = 10v, r l = 10k ? connected to gnd, and ref = gnd, unless otherwise noted. gain vs frequency closed-loop gain (db) 20 0 20 40 60 80 frequency (hz) 10k 100k 1m 10m c l = 500pf common-mode rejection vs frequency commom-mode rejection (db) 100 80 60 40 20 frequency (hz) 100 1k 10k 100k 1m v s = 10v or 2.5v power-supply rejection vs frequency power-supply rejection (db) 120 100 80 60 40 20 0 frequency (hz) 10 100 1k 10k 100k 1m +psrr psrr maximum output voltage vs frequency peak-to-peak output voltage (v) 25 20 15 10 5 0 frequency (hz) 100 1k 10k 100k 1m quiescent current vs temperature quiescent current ( a) 700 600 500 400 300 200 100 0 temperature ( c) 75 125 50 25 0 25 50 75 100 v s = 10v v s = 2.5v short-circuit current vs temperature short-circuit current (ma) 10 5 0 5 10 15 20 25 temperature ( c) 60 120 40 20 0 20 40 60 80 100 v s = 10v v s = 2.5v INA152 5 sbos184 typical performance curves (cont.) at t a = +25 c, v s = 10v, r l = 10k ? connected to gnd, and ref = gnd, unless otherwise noted. 0.1hz to 10hz peak-to-peak voltage noise 1 v/div 1s/div slew rate vs temperature slew rate (v/ s) 0.5 0.45 0.4 0.35 0.3 0.25 temperature ( c) 60 120 40 20 0 20 40 60 80 100 output voltage swing vs output current output voltage swing (v) 10 8 6 4 2 0 2 4 6 8 10 output current (ma) 015 2.5 5 7.5 10 12.5 v s = 10v +85 c 40 c +25 c +85 c 40 c +25 c output voltage vs output current output voltage swing (v) 2.5 2 1.5 1 0.5 0 0.5 1 1.5 2 2.5 output current (ma) 014 2 4 6 8 10 12 v s = 2.5v +85 c 40 c +25 c +85 c 40 c +25 c output voltage vs output current output voltage swing (v) 1.5 1 0.5 0 0.5 1 1.5 output current (ma) 02.5 0.5 1 1.5 2 v s = 1.35v +85 c 40 c +25 c +85 c 40 c +25 c noise spectral density noise (nv/ hz) 1k 100 10 frequency (hz) 0.1 1 10 100 1k INA152 6 sbos184 typical performance curves (cont.) at t a = +25 c, v s = 10v, r l = 10k ? connected to gnd, and ref = gnd, unless otherwise noted. large-signal step response 2v/div 25 s/div settling time vs load capacitance settling time ( s) 45 40 35 30 25 20 loading capacitance (pf) 100 1000 0.01% 0.1% input common-mode voltage vs output voltage common-mode voltage (v) 25 20 15 10 5 0 5 10 15 20 25 output voltage (v) 10 10 7.5 5 2.5 0 2.5 5 7.5 v s = 10v v s = +5v v s = 2.5v offset voltage production distribution percentage of units (%) 16 14 12 10 8 6 4 2 0 offset voltage ( v) v s = 10v 1000 800 600 400 200 0 200 400 600 800 1000 offset voltage production distribution percentage of units (%) 16 14 12 10 8 6 4 2 0 offset voltage ( v) v s = 2.5v 1000 800 600 400 200 0 200 400 600 800 1000 small-signal step response 50mv/div 50mv/div 50ms/div c l = 25 c l = 470pf INA152 7 sbos184 typical performance curves (cont.) at t a = +25 c, v s = 10v, r l = 10k ? connected to gnd, and ref = gnd, unless otherwise noted. offset voltage drift percentage of units (%) 40 35 30 25 20 15 10 5 0 offset voltage drift ( v/ c) v s = 10v 12345678910 offset voltage drift percentage of units (%) 40 35 30 25 20 15 10 5 0 offset voltage drift ( v/ c) v s = 2.5v 12345678910 INA152 8 sbos184 applications information the INA152 is a low-power difference amplifier suitable for a wide range of general-purpose applications. figure 1 shows the basic connections required for operation of the INA152. decoupling capacitors are strongly recommended in applications with noisy or high-impedance power sup- plies. the capacitors should be placed close to the device pins, as shown in figure 1. as shown in figure 1, the differential input signal is con- nected to pins 2 and 3. the source impedances connected to the inputs must be nearly equal to assure good common- mode rejection. an 8 ? mismatch in source impedance will degrade the common-mode rejection of a typical device to approximately 80db (a 16 ? 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. the INA152? internal resistors are accurately ratio trimmed to match. that is, r 1 is trimmed to match r 2, and r 3 is trimmed to match r 4 . however, the absolute values may not be equal (r 1 + r 2 may be slightly different than r 3 + r 4 ). thus, large series resistors on the input (greater than 250 ? ), even if well matched, will degrade common-mode rejection. circuit-board layout constraints might suggest possible varia- tions in connections of the internal resistors. it might appear that pins 1 and 3 could be interchanged, however, because of the ratio trimming technique used (see paragraph above) cmrr will be degraded. if pins 1 and 3 are interchanged, pins 2 and 5 must also be interchanged to maintain proper ratio matching. operating voltage the INA152 operates from single (+2.7v to +20v) or dual ( 1.35v to 10v) supplies with excellent performance. speci- fications are production tested with +5v and 10v supplies. most behavior remains unchanged throughout the full oper- ating voltage range. parameters that vary significantly with operating voltage are shown in the typical performance curves. input voltage the INA152 can accurately measure differential signals that are above and below the supply rails. linear common-mode range extends from 2 ?[(v+) ?1v] to 2 ?(v? (nearly twice the supplies). see the typical performance curve, ?nput common-mode voltage vs output voltage? offset voltage trim the INA152 is laser trimmed for low offset voltage and drift. most applications require no external offset adjustment. 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 ? to maintain good common- mode rejection. figure 1. precision difference amplifier (basic power supply and signal connections). figure 2. offset adjustment. v 3 +in 5 6 1 3 INA152 v o = v 3 v 2 gain error = 0.01% cmr = 94db nonlinearity = 0.002% 2 r 3 40k ? r 4 40k ? r 1 40k ? r 2 40k ? v 2 in 1 f v 4 1 f v+ 7 v 3 5 6 3 v o INA152 v o = v 3 v 2 offset adjustment range = 1mv 2 r 3 r 1 r 2 r 4 v 2 10 ? 100k ? 10 ? 100k ? +v v 1 INA152 9 sbos184 typical applications figure 3. precision instrumentation amplifier. the INA152 can be combined with op amps to form a complete instrumen- tation amplifier (ia) with specialized performance characteristics. texas instruments offers many complete high performance ias. products with related performances are shown at the right in the table below. figure 4. current receiver with compliance to rails. figure 5. pseudoground generator. figure 6. precision unity-gain inverting amplifier. 5 6 1 3 INA152 2 v 1 in v o a 2 a 1 r 2 r 2 r 1 v 2 +in v o = (1 + 2r 2 /r 1 ) (v 2 v 1 ) 100 ? (1) 1% v 5 6 3 INA152 2 100 ? (1) 1% 1 v 0 0 to 2v i in 0 to 20ma note: (1) input series resistors should be less than 250 ? (1% max mismatch) to maintain excellent cmr. with 100 ? resistors, gain error is increased to 0.5%. 5 6 2 v o = (v+)/2 INA152 v+ 1 7 4 v+ common common 3 5 6 v o = v 2 INA152 2 v 2 13 similar complete a 1 , a 2 feature texas instruments ia opa2227 low noise ina163 opa129 ultra low bias current (fa) ina116 opa2277 low offset drift, low noise ina114, ina128 opa2130 low power, fet-input (pa) ina121 opa2234 single supply, precision, low power ina122, ina118 INA152 10 sbos184 figure 7. precision gain = 2 amplifier. figure 10. precision summing amplifier. figure 12. precision summing amplifier with gain. v 1 5 6 1 3 v o = 2 v 1 INA152 2 v o = v 1 + v 3 v 1 5 6 1 3 INA152 2 v 3 v 1 6 1 3 v o INA152 v 3 25 r 1 r 2 v o = 1 + r 2 r 1 v 1 + v 3 2 ( )( ) figure 9. precision average value amplifier. (v 1 + v 3 ) 2 v o = v 1 5 6 1 3 2 INA152 v 3 figure 8. precision gain = 1/2 amplifier. v 3 5 6 3 2 INA152 1 v o = v 3 2 figure 11. 5v precision voltage reference. 5 6 1 3 INA152 2 4 2 +10v 6 5v out +5v out ref02 INA152 11 sbos184 figure 13. instrumentation amplifier guard drive generator. figure 14. precision summing instrumentation amplifier. shield 5 6 1 2 INA152 a 1 a 2 11 12 a 3 output g = 1 + 50k ? r g feedback 3 noise (60hz hum) noise (60hz hum) transducer or analog signal 13 7 v+ v 8 ref 10 25k ? 25k ? 25k ? 25k ? ina115 1 25k ? 25k ? 4 2 3 14 15 5 r g 100k ? v 1 a 3 INA152 2 v 2 v 3 v o = v 3 + v 4 v 1 v 2 INA152 v 4 b INA152 12 sbos184 figure 15. precision voltage-to-current converter with differential inputs. figure 16. differential input voltage-to-current converter for low i out . figure 17. isolating current source. figure 18. differential output difference amplifier. figure 19. isolating current source with buffering amplifier for greater accuracy. 5 6 3 INA152 2 1 v 1 v 2 load i o = (v 1 v 2 ) (1/40k + 1/r) i o r r 5 6 3 INA152 2 1 v 3 v 2 load i o = (v 3 v 2 )/r i o r opa130 5 6 3 INA152 2 1 v 3 v 2 load i o r r gate can be +v s 5v i o = (v 3 v 2 ) (1/40k + 1/r) r < 200 ? 5 6 3 INA152 2 v 01 1 5 6 3 INA152 a b 2 v 01 v 02 = 2 (v 2 v 1 ) v 02 1 v 2 v 1 5 6 3 INA152 2 1 v 3 v 2 load i o r gate can be +v cc 5v i o = (v 3 v 2 ) r (r 200 ? ) INA152 13 sbos184 figure 23. high output current precision difference amplifier. figure 20. differential input data acquisition. figure 21. digitally controlled gain of 1 amplifier. figure 22. precision absolute value buffer. 5 6 1 INA152 ads7806 2 3 4 7 +5v v s 12 bits out 0v-4v input transducer or analog signal 5v eliminates errors due to different grounds. 5 6 3 1 INA152 2 1 v o dg188 v 1 logic in logic in 0 1 v o v 1 +v 1 v 1 input 5 6 3 1 v 0 = |v 1 | INA152 2 r 4 r 3 r 1 r 2 opa130 10pf d 1 d 2 r 5 2k ? 5 6 1 INA152 buf634 2 3 v o r l in +in buf634 inside feedback loop contributes no error. package option addendum www.ti.com 10-jun-2014 addendum-page 1 packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish (6) msl peak temp (3) op temp (c) device marking (4/5) samples INA152ea/250 active vssop dgk 8 250 green (rohs & no sb/br) cu nipdau | cu nipdauag level-3-260c-168 hr -40 to 85 b52 INA152ea/250g4 active vssop dgk 8 250 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr -40 to 85 b52 INA152ea/2k5 active vssop dgk 8 2500 green (rohs & no sb/br) cu nipdau | cu nipdauag level-3-260c-168 hr -40 to 85 b52 (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. (4) there may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) multiple device markings will be inside parentheses. only one device marking contained in parentheses and separated by a "~" will appear on a device. if a line is indented then it is a continuation of the previous line and the two combined represent the entire device marking for that device. (6) lead/ball finish - orderable devices may have multiple material finish options. finish options are separated by a vertical ruled line. lead/ball finish values may wrap to two lines if the finish value exceeds the maximum column width. 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 package option addendum www.ti.com 10-jun-2014 addendum-page 2 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. 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 INA152ea/250 vssop dgk 8 250 180.0 12.4 5.3 3.4 1.4 8.0 12.0 q1 INA152ea/2k5 vssop dgk 8 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 q1 package materials information www.ti.com 26-jan-2013 pack materials-page 1 *all dimensions are nominal device package type package drawing pins spq length (mm) width (mm) height (mm) INA152ea/250 vssop dgk 8 250 210.0 185.0 35.0 INA152ea/2k5 vssop dgk 8 2500 367.0 367.0 35.0 package materials information www.ti.com 26-jan-2013 pack materials-page 2 important notice texas instruments incorporated and its subsidiaries (ti) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per jesd46, latest issue, and to discontinue any product or service per jesd48, latest issue. buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. all semiconductor products (also referred to herein as ? components ? ) are sold subject to ti ? s terms and conditions of sale supplied at the time of order acknowledgment. ti warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in ti ? s terms and conditions of sale of semiconductor products. testing and other quality control techniques are used to the extent ti deems necessary to support this warranty. except where mandated by applicable law, testing of all parameters of each component is not necessarily performed. ti assumes no liability for applications assistance or the design of buyers ? products. buyers are responsible for their products and applications using ti components. to minimize the risks associated with buyers ? products and applications, buyers should provide adequate design and operating safeguards. ti does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right relating to any combination, machine, or process in which ti components or services are used. information published by ti regarding third-party products or services does not constitute a license to use such products or services or a warranty or endorsement thereof. use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from ti under the patents or other intellectual property of ti. reproduction of significant portions of ti information in ti data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. ti is not responsible or liable for such altered documentation. information of third parties may be subject to additional restrictions. resale of ti components or services with statements different from or beyond the parameters stated by ti for that component or service voids all express and any implied warranties for the associated ti component or service and is an unfair and deceptive business practice. ti is not responsible or liable for any such statements. buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements concerning its products, and any use of ti components in its applications, notwithstanding any applications-related information or support that may be provided by ti. buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause harm and take appropriate remedial actions. buyer will fully indemnify ti and its representatives against any damages arising out of the use of any ti components in safety-critical applications. in some cases, ti components may be promoted specifically to facilitate safety-related applications. with such components, ti ? s goal is to help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and requirements. nonetheless, such components are subject to these terms. no ti components are authorized for use in fda class iii (or similar life-critical medical equipment) unless authorized officers of the parties have executed a special agreement specifically governing such use. only those ti components which ti has specifically designated as military grade or ? enhanced plastic ? are designed and intended for use in military/aerospace applications or environments. buyer acknowledges and agrees that any military or aerospace use of ti components which have not been so designated is solely at the buyer ' s risk, and that buyer is solely responsible for compliance with all legal and regulatory requirements in connection with such use. ti has specifically designated certain components as meeting iso/ts16949 requirements, mainly for automotive use. in any case of use of non-designated products, ti will not be responsible for any failure to meet iso/ts16949. products applications audio www.ti.com/audio automotive and transportation www.ti.com/automotive amplifiers amplifier.ti.com communications and telecom www.ti.com/communications data converters dataconverter.ti.com computers and peripherals www.ti.com/computers dlp ? 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