smr1d/smr3d vishay foil resistors high precision bulk metal ? foil molded surface mount resistor with tcr down to 2 ppm/c , flexible terminations, and load life stabil ity of 0.005 % (50 ppm) document number: 63102 for any ques tions, contact: foil@vishay.com www.vishay.com revision: 14-nov-07 1 any value at any tolerance available within resistance range introduction the smrxd is a precision molded surface mountable resistor offering all the elements of precision; including low tcr, tight tolerance, long term stability, low noise, low thermal emf, and non-measurable voltage coefficient. it utilizes the bulk metal ? foil technology for the resistive element with its inherent low and predictable tcr and long term stability. this surface mountable product affords similar performance to the time tested s series molded through-hole product. the flexible terminations of this product also reduce stress transference from the pcb to the resistor. voltage division with tight tracking < 3 ppm/c can be achieved with 2 randomly selected units even with a large ratio between the two values. our application engineering department is available to advise and make recommendations. for non-standard technical requirements and special applications, please contact us. note 1. tighter performances are available features ? temperature coefficient of resistance (tcr): 2 ppmc typical (- 55 c to + 125 c, + 25 c ref.) ? tolerance: to 0.01 % ? flexible terminations ensure minimal stress transference from the pcb due to a difference in thermal coefficient of expansions (tce) ? electrostatic discharge (esd) above 25 000 v ? load life stability: 0.005 % (70 c, 2000 h at rated power) ? resistance range: 5 to 80 k (for higher and lower values, please contact us) ? power rating: to 600 mw at 70 c ? non inductive, non capacitive design ? current noise: - 40 db ? voltage coefficient: < 0.1 ppm/v ? non inductive: < 0.08 h ? non hot spot design ? terminal finishes available: lead (pb)-free tin/lead alloy ? matched sets with tcr tracking are available upon request ? any value available within resistance range (e.g. 1k234) ? prototype samples available from 48 h. for more information, please co ntact foil@vishay.com ? for better performances please review smrxdz datasheet applications ? military, airborne and space ? precision amplifiers ? high precision instrumentation ? medical ? automatic test equipment (ate) ? industrial ? audio (high end stereo equipment) ? eb application ? pulse application ? measurement instrumentation * pb containing terminations are not rohs compliant, exemptions may apply table 1 - the smrxd series is listed in the following dscc specifications model dscc mil spec smr1d 06020 mil-prf-55182 smr3d 06021 mil-prf-55182 table 2 - tolerance and tcr versus resistance value (- 55 c to + 125 c, + 25 c ref.) value standard tolerance 1) typical tcr and max. spread 1) (ppm/c) 50 to 80 k 0.01 % 2 3 20 to < 50 0.02 % 2 4 10 to < 20 0.05 % 2 6 5 to < 10 0.1 % 2 8 figure 1 - power derating curve a v aila b le p b -free rohs* compliant r 1 r 2 v in v o u t - + smrxd 200 175 150 125 100 75 50 25 0 - 75 - 25 + 25 + 75 + 125 + 175 ambient temperature (c) percent of rated power ( % ) - 55 c + 70 c
smr1d/smr3d vishay foil resistors high precision bulk metal ? foil molded surface mount resistor with tcr down to 2 ppm/c , flexible terminations, and load life stability of 0.005 % (50 ppm) www.vishay.com for any questions, contact: foil@vishay.com document number: 63102 2 revision: 14-nov-07 note 1. as shown + 0.01 to allow for measurement error at low values table 3 - performance specifications test conditions maximum limit 1) smr1d smr3d smr1d smr3d resistance range 5 to 33 k 5 to 80 k rated power 5 to 10 k 0.250 w at 70 c 0.125 w at 125 c 10 k to 33 k 0.160 w at 70 c 0.08 w at 125 c 5 to 30 k 0.6 w at 70 c 0.3 w at 125 c 30 k to 80 k 0.4 w at 70 c 0.2 w at 125 c see figure 1 maximum working voltage 73 v 180 v maximum operating temperature + 175 c (see figure 1) working temperature range - 55 c to + 125 c (mil range) thermal shock - 65 c to + 150 c; 30 min; 5 cycles 0.01 % (100 ppm) short time overload 6.25 x rated power; 5 s 0.01 % (100 ppm) low temperature storage 24 h at - 65 c 0.01 % (100 ppm) low temperature operation 45 min, rated power at - 65 c 0.01 % (100 ppm) dielectric withstanding voltag e atmospheric pressure; ac 200 v; 1 min 0.01 % (100 ppm) insulation resistance (m ) dc 100 v; 1 min over 10 000 resistance to soldering heat (%) 260 c; 10 s 0.02 %, 0.01 % typical moisture resistance + 65 c to - 10 c; 90 % to 98 % rh; rated power; 240 h 0.02 % (200 ppm) shock 100 g; sawtooth 0.01 % (100 ppm) vibration, high frequency 10 ~ 2000 ~ 10 hz; 20 g; y, z each 4 h 0.01 % (100 ppm) load life stability (2000 h) 0.04 w at + 70 c 0.25 w at + 70 c 0.125 w at + 125 c 0.1 w at + 70 c 0.6 w at + 70 c 0.3 w at + 125 c ty p i c a l 0.005 % 0.02 % 0.02 % ty p i c a l 0.005 % 0.015 % 0.015 % high temperature exposure 175 c; no load 2000 h 0.05 % (500 ppm) weight 0.1143 g 0.244 g packaging bulk (loose) or tape and reel, per eia-481-1
document number: 63102 for any ques tions, contact: foil@vishay.com www.vishay.com revision: 14-nov-07 3 smr1d/smr3d high precision bulk metal ? foil molded surface mount resistor with tcr down to 2 ppm/c , flexible terminations, and load life stability of 0.005 % (50 ppm) vishay foil resistors figure 2 - dimensions in inches (millimeters) model l w h p tw th (minimum) smr1d 0.236 0.012 (5.99 0.30) 0.126 0.012 (3.20 0.30) 0.098 0.012 (2.49 0.30) 0.051 0.012 (1.30 0.30) 0.087 0.004 (2.21 0.10) 0.039 (0.99) smr3d 0.287 0.012 (7.29 0.30) 0.170 0.012 (4.32 0.30) 0.110 0.012 (2.79 0.30) 0.051 0.012 (1.30 0.30) 0.095 0.004 (2.41 0.10) 0.039 (0.99) th minim u m side view stand off w bottom view l p p end view h t w top view 100r0t (date code) - v tolera n ce lead (p b )-free i n dicator v alue (5 digits) figure 3 - recommended mounting pad geometries in inches (millimeters) model method a min. b ref c ref d 0.04 ( 1.02) e ref smr1d reflow 0.110 (2.79) 0.106 (2.69) 0.124 (3.15) 0.337 (8.55) 0.050 (1.27) smr3d reflow 0.118 (3.00) 0.106 (2.69) 0.175 (4.45) 0.388 (9.86) 0.050 (1.27) per ipc-sm-782 rev. a e a c b d reflow solder pads figure 4 - trimming to values (conceptual illustration) m u t u al ind u ctance red u ction d u e to change in c u rrent direction c u rrent path before trimming trimming process remo v es this material from shorting strip area changing c u rrent path and increasing resistance note: foil sho w n in b lack, etched spaces in w hite c u rrent path after trimming interloop capacitance red u ction in series figure 5 - typical tcr curve (for more details, see table 2) note: the tcr values for < 80 are influenced by the termination composition and the result in deviation from this curve - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 - 55 2 ppm/c (+ 25 c reference) + 150 + 100 + 50 0 - 50 - 100 - 150 - 200 r r (ppm) ambient tem p erature ( c )
smr1d/smr3d vishay foil resistors high precision bulk metal ? foil molded surface mount resistor with tcr down to 2 ppm/c , flexible terminations, and load life stability of 0.005 % (50 ppm) www.vishay.com for any questions, contact: foil@vishay.com document number: 63102 4 revision: 14-nov-07 note * for non-standard requests, please co ntact application engineering. table 4 - global part number information new global part number: y112110k0000t9r (preferred part number format) denotes precision value aer* yr = k = k 0 = standard 9 = lead (pb)-free 1 - 999 = custom product code resistance tolerance packaging 1121 = smr1d 1169 = smr3d t = 0.01 % q = 0.02 % a = 0.05 % b = 0.1 % c = 0.25 % d = 0.5 % f = 1.0 % l = bulk pack r = tape and reel for example: above global order y1121 10k0000 t 9 r: type: smr1d value: 10.0 k absolute tolerance: 0.01 % termination: lead (pb)-free packaging: tape and reel historical part number: smr1d 10k000 tcr2 t s t (will continue to be used) smr1d 10k000 tcr2 t s t model ohmic value tcr characteristic resistance tolerance termination packaging smr1d smr3d 10.0 k t = 0.01 % q = 0.02 % a = 0.05 % b = 0.1 % c = 0.25 % d = 0.5 % f = 1.0 % s = lead (pb)-free b = tin/lead b = bulk pack t = tape and reel 1211 k00 0 y1 0 r 0 t 9
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