functional block diagram ssm2141 ?n +in sense +v cc output ? ee reference 25kw 25kw 25kw 25kw 1 3 2 5 7 6 4 pin connections 8-pin plastic mini-dip (p suffix) narrow body so (s suffix) 1 2 3 4 8 7 6 5 top view (not to scale) nc = no connect ssm2141 reference sense output v+ nc ?n +in v rev. 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 which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of analog devices. a high common-mode rejection differential line receiver ssm2141 one technology way, p.o. box 9106, norwood, ma 02062-9106, u.s.a. tel: 617/329-4700 fax: general description the ssm2141 is an integrated differential amplifier intended to receive balanced line inputs in audio applications requiring a high level of noise immunity and optimum common-mode rejection. the ssm2141 typically achieves 100 db of common- mode rejection (cmr), whereas implementing an op amp with four off-the-shelf precision resistors will typically achieve only 40 db of cmrinadequate for high-performance audio. the ssm2141 achieves low distortion performance by maintaining a large slew rate of 9.5 v/ m s and high open-loop gain. distortion is less than 0.002% over the full audio bandwidth. the ssm2141 complements the ssm2142 balanced line driver. together, these devices comprise a fully integrated solution for equivalent transformer balancing of audio signals without the problems of distortion, emi fields, and high cost. additional applications for the ssm2141 include summing signals, differential preamplifiers, and 600 w low distortion buffer amplifiers. for similar performance with g = 1/2, see ssm2143. features high common-mode rejection dc: 100 db typ 60 hz: 100 db typ 20 khz: 70 db typ 40 khz: 62 db typ low distortion: 0.001% typ fast slew rate: 9.5 v/ m s typ wide bandwidth: 3 mhz typ low cost complements ssm2142 differential line driver applications line receivers summing amplifiers buffer amplifiersCdrives 600 v load c 781/461-3113
ssm2141Cspecifications electrical characteristics ssm2141 parameter symbol conditions min typ max units offset voltage v os v cm = 0 v C1000 25 1000 m v gain error no load, v in = 10 v, r s = 0 w 0.001 0.01 % input voltage range ivr (note 1) 10 v common-mode rejection cmr v cm = 10 v 80 100 db power supply rejection ratio psrr v s = 6 v to 18 v 0.7 15 m v/v output swing v o r l = 2 k w 13 14.7 v short-circuit current limit i sc output shorted to ground +45/C15 ma small-signal bandwidth (C3 db) bw r l = 2 k w 3 mhz slew rate sr r l = 2 k w 6 9.5 v/ m s total harmonic distortion r l = 100 k w 0.001 % thd r l = 600 w 0.01 capacitive load drive capability c l no oscillation 300 pf supply current i sy no load 2.5 3.5 ma notes 1 input voltage range guaranteed by cmr test. specifications subject to change without notice electrical characteristics parameter symbol conditions min typ max units offset voltage v os v cm = 0 v C2500 200 2500 m v gain error no load, v in = 10 v, r s = 0 w 0.002 0.02 % input voltage range ivr (note 1) 10 v common-mode rejection cmr v cm = 10 v 75 90 db power supply rejection ratio psrr v s = 6 v to 18 v 1.0 20 m v/v output swing v o r l = 2 k w 13 14.7 v slew rate sr r l = 2 k w 9.5 v/ m s supply current i sy no load 2.6 4.0 ma notes 1 input voltage range guaranteed by cmr test. specifications subject to change without notice rev. C2C (@ v s = 6 18 v, t a = +25 8 c, unless otherwise noted) (@ v s = 6 18 v, C40 8 c t a +85 8 c) c
ssm2141 rev. C3C absolute maximum ratings 1 supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 v input voltage 1 . . . . . . . . . . . . . . . . . . . . . . . . supply voltage output short-circuit duration . . . . . . . . . . . . . . continuous storage temperature range p package . . . . . . . . . . . . . . . . . . . . . . . C65 c to +150 c lead temperature (soldering, 60 sec) . . . . . . . . . . . . +300 c junction temperature . . . . . . . . . . . . . . . . . . . . . . . . +150 c operating temperature range . . . . . . . . . . . . C40 c to +85 c typical performance characteristics small signal transient response common-mode rejection vs. frequency total harmonic distortion vs. frequency large signal transient response power supply rejection vs. frequency dynamic intermodulation distortion vs. frequency package type u ja 2 u jc units 8-pin plastic dip (p) 103 43 c/w notes 1 for supply voltages less than 18 v, the absolute maximum input voltage is equal to the supply voltage. 2 q ja is specified for worst case mounting conditions, i.e., q ja is specified for device in socket for p-dip package. c
ssm2141C typical performance characteristics rev. C4C input offset voltage vs. temperature gain error vs. temperature supply current vs. supply voltage closed-loop output impedance vs. frequency supply current vs. temperature maximum output voltage vs. output current (sink) closed-loop gain vs. frequency slew rate vs. temperature maximum output voltage vs. output current (source) c
ssm2141 rev. C5C voltage noise density vs. frequency 10mv 1ms +10? 0v ?0? t a = +25 c v s = 15v note: external amplifier gain = 1000; therefore, vertical scale = 10?/div. voltage noise from 0 khz to 1 khz 5mv 1s +1? 0v ?? 0.1 to 10hz peak-to-peak noise low frequency voltage noise 10mv 2ms +10? 0v ?0? note: external amplifier gain = 1000; therefore, vertical scale = 10?/div. t a = +25 c v s = 15v voltage noise from 0 khz to 10 khz slew rate test circuit applications information the ssm2141 represents a versatile analog building block. in order to capitalize on fast settling time, high slew rate, and high cmr, proper decoupling and grounding techniques must be employed. for decoupling, place 0.1 m f capacitor located within close proximity from each supply pin to ground. c
ssm2141 rev. C6C maintaining common-mode rejection in order to achieve the full common-mode rejection capability of the ssm2141, the source impedance must be carefully controlled. slight imbalances of the source resistance will result in a degradation of dc cmreven a 5 w imbalance will degrade cmr by 20 db. also, the matching of the reactive source impedance must be matched in order to preserve the cmrr over frequency. figure 1. precision difference amplifier. rejects common-mode signal = [e 1 + e 2 ] 2 by 100 db figure 2. precision unity gain inverting amplifier figure 3. precision summing amplifier figure 4. precision summing amplifier with gain figure 5. suitable instrumentation amplifier requirements can be addressed by using an input stage consisting of a 1 , a 2 , r 1 and r 2 c
ssm2141 rev. c C7C outline dimensions compliant to jedec standards ms-001 controlling dimensions are in inches; millimeter dimensions (in parentheses) are rounded-off inch equivalents for reference only and are not appropriate for use in design. corner leads may be configured as whole or half leads. 070606-a 0.022 (0.56) 0.018 (0.46) 0.014 (0.36) seating plane 0.015 (0.38) min 0.210 (5.33) max 0.150 (3.81) 0.130 (3.30) 0.115 (2.92) 0.070 (1.78) 0.060 (1.52) 0.045 (1.14) 8 1 4 5 0.280 (7.11) 0.250 (6.35) 0.240 (6.10) 0.100 (2.54) bsc 0.400 (10.16) 0.365 (9.27) 0.355 (9.02) 0.060 (1.52) max 0.430 (10.92) max 0.014 (0.36) 0.010 (0.25) 0.008 (0.20) 0.325 (8.26) 0.310 (7.87) 0.300 (7.62) 0.195 (4.95) 0.130 (3.30) 0.115 (2.92) 0.015 (0.38) gauge plane 0.005 (0.13) min figure 6. 8-lead plastic dual in-line package [pdip] narrow body (n-8) dimensions shown in inches and (millimeters) controlling dimensions are in millimeters; inch dimensions (in parentheses) are rounded-off millimeter equivalents for reference only and are not appropriate for use in design. compliant to jedec standards ms-012-aa 012407-a 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.0157) 0.50 (0.0196) 0.25 (0.0099) 45 8 0 1.75 (0.0688) 1.35 (0.0532) seating plane 0.25 (0.0098) 0.10 (0.0040) 4 1 85 5.00 (0.1968) 4.80 (0.1890) 4.00 (0.1574) 3.80 (0.1497) 1.27 (0.0500) bsc 6.20 (0.2441) 5.80 (0.2284) 0.51 (0.0201) 0.31 (0.0122) coplanarity 0.10 figure 7.8-lead standard small outline package [soic_n] narrow body (r-8) dimensions shown in millimeters and (inches)
ssm2141 C8C rev. c ordering guide model 1 temperature range package description package option ssm2141pz ?40c t a +85c 8-lead pdip n-8 SSM2141SZ ?40c t a +85c 8-lead soic_n r-8 SSM2141SZ-reel ?40c t a +85c 8-lead soic_n r-8 1 z = rohs compliant part. revision history 6/11rev. b to rev. c updated outline dimensions ......................................................... 7 changes to ordering guide ............................................................ 8 5/91rev. a to rev. b ?2007 analog devices, inc. all rights reserved. trademarks and registered trademarks are the prop erty of their respective owners. d10008-0-6/11(c)
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