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? 1999 burr-brown corporation pds-1531a printed in u.s.a. june, 1999 features l designed for low cost l g = 10v/v or g = 0.1v/v l single, dual versions l low offset voltage: 250 m v max, 3 m v/ c max l low gain error: 0.01% l high slew rate: 5v/ m s l fast settling time: 9 m s to 0.01% l low quiescent current: 950 m a l wide supply range: 2.25v to 18v l so-8 and so-14 packages applications l differential input amplifier building block l diff in/diff out amplifier l gain = C10 inverting amplifier l gain = +10 non-inverting amplifier l gain = +11 non-inverting amplifier l synchronous demodulator l current/differential line receiver l voltage-controlled current source l battery powered systems l low cost automotive description the ina143 and ina2143 are high slew rate, gain of 10v/v or 0.1v/v difference amplifiers 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 resistor maintains gain accuracy and common- mode rejection over temperature. they operate over a wide supply range, 2.25v to 18v (+4.5v to +36v single supply), and input common-mode voltage range extends beyond the positive and negative supply rails. ina143 ina2143 high-speed, precision, g = 10 or g = 0.1 difference amplifiers 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 the differential amplifier is the foundation of many commonly used circuits. the low cost ina143 and ina2143 provide this precision circuit function without using an expensive precision network. the single version, ina143, package is the so-8 surface mount. the dual version, ina2143, package is the so-14 surface mount. both are specified for operation over the extended industrial temperature range, C40 c to +85 c. operation is from C55 c to +125 c. 10k w 100k w sense ina143 output v+ ref ?n +in 5 6 1 2 7 v 4 3 10k w 100k w sense a ina2143 out a v+ ref a ?n a +in a 12 13 14 2 11 v 4 3 10k w 100k w 10k w 100k w 10k w 100k w 10k w 100k w b a sense b out b ref b ?n b +in b 10 9 8 6 5 ina143 in a 2143 for most current data sheet and other product information, visit www.burr-brown.com sbos116
2 ina143, ina2143 ina143u ina143ua ina2143u ina2143ua specifications: v s = 15v at t a = +25 c, v s = 15v, g = 10, r l = 10k 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. parameter conditions min typ max min typ max units offset voltage (1) rti initial (1) v cm = 0v 100 250 [ 500 m v vs temperature 1 3 see typical curve m v/ c vs power supply v s = 2.25v to 18v 5 20 [ 30 m v/v vs time 0.2 [ m v/ ? mo channel separation (dual) dc 140 db input impedance (3) differential 20 [ k w common-mode 55 [ k w input voltage range rti common-mode voltage range positive v o = 0v 1.1[(v+)C 1.5] 1.1[(v+) C1] [[ v negative v o = 0v 1.1[(vC) + 1.5] 1.1[(vC) + 1] [[ v common-mode rejection ratio v cm = C14.85v to 14.85v, r s = 0 w 86 96 80 [ db output voltage noise (3) rti f = 0.1hz to 10hz 1 [ m vp-p f = 10hz 45 [ nv/ ? hz f = 100hz 30 [ nv/ ? hz f = 1khz 27 [ nv/ ? hz gain initial 10 [ v/v error v o = C14v to +13.5v 0.01 0.05 [ 0.1 % vs temperature 1 10 [[ ppm/ c nonlinearity v o = C14v to +13.5v 0.0001 0.001 [ 0.002 % of fs output voltage output gain error < 0.1% positive r l = 10k w to ground (v+) C1.5 (v+) C1.3 [[ v negative r l = 10k w to ground (vC) +1 (vC) +0.8 [[ v positive r l = 100k w to ground (v+) C0.8 [ v negative r l = 100k w to ground (vC) +0.3 [ v current limit continuous-to-common C25, +32 [ ma capacitive load (stable operation) 1000 [ pf frequency response small-signal bandwidth C3db 0.15 [ mhz slew rate 5 [ v/ m s settling time: 0.1% v o = 10v step, c l = 100pf 6 [ m s 0.01% v o = 10v step, c l = 100pf 9 [ m s overload recovery time 50% overdrive 6 [ m s power supply rated voltage 15 [ v operating voltage range dual supplies 2.25 18 [[ v single supply +4.5 +36 [[ v quiescent current (per amplifier) i o = 0 0.95 1.2 [[ ma temperature range specification C40 +85 [[ c operation C55 +125 [[ c storage C55 +125 [[ c thermal resistance q ja so-8 surface mount 150 [ c/w so-14 surface mount 100 [ c/w [ specifications the same as ina143u, ina2143u. notes: (1) includes the effects of amplifiers input bias and offset currents. (2) internal resistors are ratio matched but hav e 20% absolute value. (3) includes effects of amplifiers input current noise and thermal noise contribution of resistor network.
3 ina143, ina2143 parameter conditions min typ max min typ max units offset voltage (1) rti initial (1) v cm = 0v 200 500 [ 750 m v vs temperature 1 [ m v/ c input voltage range rti common-mode voltage range positive v o = 0v 1.1[(v+)C 1.5] 1.1[(v+) C1] [[ v negative v o = 0v 1.1[(vC) + 1.5] 1.1[(vC) + 1] [[ v common-mode rejection ratio v cm = C3.85v to +3.85v, r s = 0 w 86 96 80 [ db gain initial 10 [ v/v gain error v o = C4v to +3.5v 0.01 0.05 [ 0.1 % nonlinearity v o = C4v to +3.5v 0.0001 0.001 [ 0.002 % of fs output voltage output gain error < 0.1% positive r l = 10k w to ground (v+) C1.5 (v+)C1.3 [[ v negative r l = 10k w to ground (vC) +1 (vC)+0.8 [[ v positive r l = 100k w to ground (v+)C0.8 [ v negative r l = 100k w to ground (vC)+0.3 [ v power supply rated voltage +5 [ v operating voltage range dual supplies 2.25 18 [[ v single supply +4.5 +36 [[ v quiescent current (per amplifier) i o = 0 0.92 1.2 [[ ma [ specifications the same as ina143u, ina2143u. notes: (1) includes the effects of amplifiers input bias and offset currents. ina143u ina143ua ina2143u ina2143ua specifications: v s = 5v at t a = +25 c, v s = 5v, g = 10, r l = 10k w connected to ground, and reference pin connected to ground, unless otherwise noted. supply voltage, v+ to vC .................................................................... 36v input signal (g = 10), voltage ..................................................... 1.1 ? v s current ........................................................ 0.5ma input signal (g = 0.1), voltage ..................................................... 11 ? v s current ....................................................... 0.5ma output short-circuit (to ground) (2) .......................................... 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 notes: (1) stresses above these ratings may cause permanent damage. exposure to absolute maximum conditions for extended periods may degrade device reliability. (2) one channel per package. 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 single ina143u so-8 surface mount 182 C40 c to +85 c ina143u ina143u rails """"" ina143u/2k5 tape and reel ina143ua so-8 surface mount 182 C40 c to +85 c ina143ua ina143ua rails """"" ina143ua/2k5 tape and reel dual ina2143u so-14 surface mount 235 C40 c to +85 c ina2143u ina2143u rails """"" ina2143u/2k5 tape and reel ina2143ua so-14 surface mount 235 C40 c to +85 c ina2143ua ina2143ua rails """"" ina2143ua/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 ina143ua/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
4 ina143, ina2143 pin configurations top view so-8 top view so-14 ref ?n +in v nc v+ output sense nc = no connection ina143 1 2 3 4 8 7 6 5 nc ?n a +in a v +in b ?n b nc ref a out a sense a v+ sense b out b ref b nc = no connection 1 2 3 4 5 6 7 14 13 12 11 10 9 8 a b ina2143
5 ina143, ina2143 typical performance curves at t a = +25 c, v s = 15v, g = 10, r l = 10k w connected to ground, and reference pin connected to ground, unless otherwise noted. gain vs frequency frequency (hz) closed-loop gain (db) 10k 100k 1m 5 0 ? ?0 ?5 ?0 v s = 15v or 5v common-mode rejection vs frequency frequency (hz) closed-mode rejection (db) 100 10k 100k 1k 1m 100 90 80 70 60 50 40 v s = 15v or 5v power supply rejection vs frequency frequency (hz) power supply rejection (db) 1 100 1k 10k 10 100k 120 100 80 60 40 20 ?srr +psrr maximum output voltage vs frequency frequency (hz) peak-to-peak output voltage (v) 10k 100k 1m 32 28 24 20 16 12 8 4 0 v s = 15v v s = 5v input common-mode voltage vs output voltage output voltage (v) common-mode voltage (v) ?5 0 5 10 ? ?0 15 20 15 10 5 0 ? ?0 ?5 ?0 v s = 5v v s = 15v total harmonic distortion+noise vs frequency frequency (hz) thd+n (%) 20 1k 10k 100 20k 0.1 0.01 0.001 500khz filter
6 ina143, ina2143 typical performance curves (cont) at t a = +25 c, v s = 15v, g = 10, r l = 10k w connected to ground, and reference pin connected to ground, unless otherwise noted. voltage noise density vs frequency frequency (hz) voltage noise (nv/ ? hz) 1 100 1k 10 10k 100 10 quiescent current vs temperature temperature ( c) quiescent current ( a) ?5 ?0 ?5 25 50 75 100 0 125 1400 1300 1200 1100 1000 900 800 700 per amplifier slew rate vs temperature temperature ( c) slew rate (v/ s) ?5 ?0 ?5 25 50 75 100 0 125 7 6 5 4 3 ?r +sr v s = 15v v s = 5v short-circuit current vs temperature temperature ( c) short-circuit |ma| ?5 ?0 ?5 25 50 75 100 0 125 40 35 30 25 20 15 +i sc +i sc ? sc ? sc v s = 15v v s = 5v output voltage swing vs output current output current (ma) output voltage (v) 0 15 20 25 30 10 5 35 ?0 c 25 c 85 c 85 c 25 c ?0 c v+ (v+) ? (v+) ?0 0 (v? +10 (v? +5 (v? 0.1hz to 10hz peak-to-peak voltage noise 500 m s/div 0.5 m v/div
7 ina143, ina2143 typical performance curves (cont) at t a = +25 c, v s = 15v, g = 10, r l = 10k w connected to ground, and reference pin connected to ground, unless otherwise noted. offset voltage production distribution v s = 15v percent of units (%) offset voltage ( v) 30 25 20 15 10 5 0 ?00 ?50 ?00 ?50 ?00 ?50 ?00 ?50 ?00 ?0 0 50 100 150 200 250 300 350 400 450 500 typical production distribution of packaged units. singles and duals included. offset voltage production distribution v s = 5v percent of units (%) offset voltage ( v) 20 18 16 14 12 10 8 6 4 2 0 ?00 ?00 ?00 ?00 ?00 ?00 ?00 0 100 200 300 400 500 600 700 typical production distribution of packaged units. singles and duals included. offset voltage drift production distribution v s = 15v percent of units (%) offset voltage drift ( v/ c) 60 50 40 30 20 10 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 typical production distribution of packaged units. singles and duals included. offset voltage drift production distribution v s = 5v percent of units (%) offset voltage drift ( v/ c) 60 50 40 30 20 10 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 typical production distribution of packaged units. singles and duals included. settling time vs capacitive load settling time ( s) capacitive load (pf) 20 15 10 5 0 0 500 1000 1500 0.01%, v s = 15v 0.01%, v s = 15v g = 10 g = 0.1 0.1%, v s = 15v 0.01%, v s = 5v channel separation vs frequency channel separation (db) frequency (hz) 150 140 130 120 110 100 1k 10k 100k ina2143
8 ina143, ina2143 typical performance curves (cont) at t a = +25 c, v s = 15v, g = 10, r l = 10k w connected to ground, and reference pin connected to ground, unless otherwise noted. small-signal step response 2.5 m s/div 100mv/div c l = 100pf c l = 1500pf large-signal step response 25 m s/div 5v/div c l = 500pf
9 ina143, ina2143 applications information the ina143 and ina2143 are high-speed difference ampli- fiers suitable for a wide range of general-purpose applica- tions. figure 1 shows the basic g = 10 configuration. the input and feedback resistors can be reversed to achieve g = 0.1, as shown in figure 2. for applications requiring g = 1, the ina133 and ina2133 are recommended. decoupling capacitors are strongly recommended for appli- cations with noisy or high impedance power supplies. the capacitors should be placed close to the device pins as shown in figure 1. all circuitry is completely independent in the dual version assuring lowest crosstalk and normal behavior when one amplifier is overdriven or short-cir- cuited. 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. a 5 w mismatch in source impedance will degrade the common-mode rejection of a typical device to approximately 86db (rti). 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 ina143s internal resistors are accurately ratio trimmed to match. that is, r 1 /r 2 and r 3 /r 4 are trimmed to equal 0.1. 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 100 w ), even if well matched, will degrade common-mode rejection. v 3 5 6 1 3 ina143 v o = 10 (v 3 v 2 ) 2 r 3 10k w r 4 100k w r 1 10k w r 2 100k w v 2 ?n +in 1 f v 4 1 f v+ 7 figure 1. g = 10 basic power supply and signal connections. operating voltage the ina143 and ina2143 operate from single (+4.5v to +36v) or dual ( 2.25v to 18v) supplies with excellent performance. specifications are production tested with 5v and 15v supplies. most behavior remains unchanged throughout the full operating voltage range. parameters which vary significantly with operating voltage are shown in the typical performance curves. offset voltage trim the ina143 and ina2143 are laser trimmed for low offset voltage and drift. most applications require no external offset adjustment. figure 3 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 3. the source impedance of a signal applied to the ref terminal should be less than 10 w to maintain good common-mode rejection. v 3 2 6 3 1 ina143 v o = 0.1 (v 3 v 2 ) 5 r 4 100k w r 3 10k w r 2 100k w r 1 10k w v 2 ?n +in figure 2. g = 0.1 difference amplifier. figure 3. offset adjustment. v 3 5 6 3 v o ina143 v o = 10 (v 3 v 2 ) offset adjustment range = 3mv compensates for impedance at pin 1?ee text. g = 10 2 r 4 100k w v 2 10 w 499k w 100 w 100k w +15v ?5v 1 r 3 10k w r 1 10k w r 2 100k w
10 ina143, ina2143 similar complete a 1 , a 2 feature burr-brown ia opa2227 low noise ina103 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 opa2237 single supply, low power, msop-8 ina122, ina126 the ina143 can be combined with op amps to form a complete instrumenta- tion amplifier with specialized performance characteristics. burr-brown offers many complete high performance ias. products with related performances are shown at the right in the table below. figure 9. precision g = 11 buffer. figure 4. difference amplifier with gain and cmr adjust. figure 5. precision g = C10 inverting amplifier. this circuit follows an 11/1 divider with a gain of 11 for an overall gain of unity. with an 11/1 divider, the input signal can exceed 55v without damage as long as input current is less than 0.5ma. figure 6. voltage follower with input protection. figure 7. precision instrumentation amplifier. figure 8. precision summing amplifier. 10 w 10 w 10k w 100k w 10k w 100k w 200 w 200 w v 1 v 2 2 3 5 1 6 v o gain adjust cmr adjust ina143 to eliminate adjustment interactions, first adjust gain with v 2 grounded. v 2 25 6 ina143 3 v o = ?0 ?v 2 1 gain error = 0.05% maximum nonlinearity = 0.001% maximum gain drift = 1ppm/ c 10k w 100k w 10k w 100k w 25 6 ina143 3 r 3 10k w v o = v in v in r 1 10k w r 4 100k w 1 r 2 100k w 55v without damage v 1 ?n 2 3 5 10k w 100k w 10k w 100k w 1 6 ina143 v 0 = 10 (1 + 2r 2 /r 1 ) (v 2 ?v 1 ) a 2 a 1 v 2 +in r 1 r 2 v o r 2 25 6 ina143 v 1 r 1 10k w r 4 100k w 1 r 2 100k w r 3 10k w 3 v 3 v o = v 1 + 10 ?v 3 10k w 100k w 5 6 ina143 v o = 11 ?v in 1 2 100k w 10k w v in 3 gain error = 0.05% maximum
important notice texas instruments and its subsidiaries (ti) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. all products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability. ti warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with ti's standard warranty. testing and other quality control techniques are utilized to the extent ti deems necessary to support this warranty. specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. customers are responsible for their applications using ti components. in order to minimize risks associated with the customer's applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. ti assumes no liability for applications assistance or customer product design. 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 of ti covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. ti's publication of information regarding any third party's products or services does not constitute ti's approval, warranty or endorsement thereof. copyright ? 2000, texas instruments incorporated

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