SMR1DZ/smr3dz (z-foil) vishay foil resistors ultra high precision z-foil molded surface mount resistor with tcr down to 0.05 ppm/c , pcr of 5 ppm at rated power, flexible terminations, and load life stability of 0.005 % (50 ppm) document number: 63118 for any ques tions, contact: foil@vishay.com www.vishay.com revision: 30-jul-07 1 im pr oved pr od u c t any value at any tolerance available within resistance range introduction the smrxdz is an ultra high precision molded surface mountable resistor offering a ll the elements of precision; including low tcr, tight tolerance, long term stability, low noise, low thermal emf, and non-measurable voltage coefficient. one of the important parameters influencing stability is the temperature co efficient of resistance (tcr). although the tcr of foil resistors is considered extremely low, this characteristic has been further refined over the years. the smrxdz utilizes ultr a high precision bulk metal ? z-foil. the z-foil technology provides a significant reduction of the resistive element?s sensit ivity to ambient temperature variations (tcr) and to self heating when power is applied (power coefficient). voltage division with tight tracking < 2 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): 0.05 ppm/c typical (0 c to + 60 c) 0.2 ppmc typical (- 55 c to + 125 c, + 25 c ref.) ? tolerance: to 0.01 % ? power coefficient of resistance (pcr) ? r due to self heating?: 5 ppm at rated power ? 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 volts ? load life stability: 0.005 % (70 c, 2000 hours 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 ? non hot spot design ? terminal finishes available: lead (pb)-free tin/lead alloy ? matched sets with tcr tracking are available upon request ? for higher performances please contact us ? any value available within resistance range (e.g. 1k234) ? prototype samples available from 48 hours. for more information, please contact foil@vishay.com applications ? precision amplifiers ? high precision instrumentation ? medical ? automatic test equipment (ate) ? industrial ? audio (high end stereo equipment) ? eb application ? military, airborne and space ? pulse application ? measurement instrumentation * pb containing terminations are not rohs compliant, exemptions may apply table 1 - 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 % 0.2 1.8 20 to < 50 0.02 % 0.2 2.8 10 to < 20 0.05 % 0.2 4.8 5 to < 10 0.1 % 0.2 6.8 figure 1 - power derating curve a v aila b le p b -free rohs* compliant r 1 r 2 vi n v out - + smrxdz 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
SMR1DZ/smr3dz (z-foil) vishay foil resistors ultra high precision z-foil molded surface mount resistor with tcr down to 0.05 ppm/c , pcr of 5 ppm at rated power, flexible terminations, and load life stability of 0.005 % (50 ppm) www.vishay.com for any questions, contact: foil@vishay.com document number: 63118 2 revision: 30-jul-07 i mpro ve d product note 1. as shown + 0.01 to allow for measurement error at low values table 2 - performance specifications test conditions maximum limit 1) SMR1DZ smr3dz SMR1DZ smr3dz 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 + 175 c; 30 minutes; 5 cycles 0.01 % (100 ppm) short time overload 6.25 x rated power; 5 seconds 0.01 % (100 ppm) low temperature operation - 65 c, 24 hours (no load): 45 minutes at rated power 0.01 % (100 ppm) dielectric withstanding voltag e atmospheric pressure; ac 200 v; 1 minute 0.01 % (100 ppm) insulation resistance (m ) dc 100 v; 1 minute over 10 000 resistance to soldering heat (%) 260 c; 10 seconds 0.02 %, 0.01 % typical moisture resistance + 65 c to - 10 c; 90 % to 98 % rh; rated power; 240 hours 0.02 % (200 ppm) shock 100 g; sawtooth 0.01 % (100 ppm) vibration, high frequency 10 ~ 2000 ~ 10 hz; 20 g; x, y, z each 2.5 hours 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 hours 0.05 % (500 ppm) weight 0.1143 g 0.244 g packaging bulk (loose) or tape and reel, per eia-481-1
document number: 63118 for any ques tions, contact: foil@vishay.com www.vishay.com revision: 30-jul-07 3 SMR1DZ/smr3dz (z-foil) ultra high precision z-foil molded surface mount resistor with tcr down to 0.05 ppm/c , pcr of 5 ppm at rated power, flexible terminations, and load life stability of 0.005 % (50 ppm) vishay foil resistors im pr oved pr od u c t notes ? for more details, see table 1 ? the tcr values for < 80 w are influenced by the termination composition and the result in deviation from this curve figure 2 - dimensions in inches (millimeters) model l w h p tw th (minimum) SMR1DZ 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) smr3dz 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 z tolera n ce z-foil i n dicator 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 SMR1DZ reflow 0.110 (2.79) 0.106 (2.69) 0.124 (3.15) 0.337 (8.55) 0.050 (1.27) smr3dz 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 z-foil + 500 + 200 + 100 0 - 100 - 200 - 300 - 500 - 55 - 25 + 25 + 60 + 75 + 100 + 125 ambient temperature (c) r r (ppm) 0 0.05 ppm/c - 0.1 ppm/c 0.1 ppm/c 0.14 ppm/c 0.2 ppm/c - 0.16 ppm/c - 400 + 300 + 400
SMR1DZ/smr3dz (z-foil) vishay foil resistors ultra high precision z-foil molded surface mount resistor with tcr down to 0.05 ppm/c , pcr of 5 ppm at rated power, flexible terminations, and load life stability of 0.005 % (50 ppm) www.vishay.com for any questions, contact: foil@vishay.com document number: 63118 4 revision: 30-jul-07 i mpro ve d product note * for non-standard requests, please contact application engineering. table 3 - global part number information new global part number: y174510k0000t9r (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 1745 = SMR1DZ 1746 = smr3dz 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 y1745 10k0000 t 9 r: type: SMR1DZ value: 10.0 k absolute tolerance: 0.01 % termination: lead (pb)-free packaging: tape and reel historical part number: SMR1DZ 10k000 tcr0.2 t s t (will continue to be used) SMR1DZ 10k000 tcr0.2 t s t model ohmic value tcr characteristic resistance tolerance termination packaging SMR1DZ smr3dz 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 7451 k00 0 y1 0 r 0 t 9
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