www.vishay.com 119 ATA vishay electro-films document number: 61022 revision 14-aug-01 vishay electro-films ?france +33.4.93.37.28.24 fax: +33.4.93.37.27.31 ?germany +49.9287.710 fax: +49 9287.70435 ?israel +9 72.3.557.0945 fax: +972.3.558.9121 ?italy + 39.2.300.11911 fax: +39.2.300.11999 ?japan +81.42.729.0661 fax: +81.42.729.3400 ?singapore +65.788.6668 fax: +65. 788.0988 ?sweden +46.8.594.70590 fax: +46.8.594.70581 ?uk +44 191 514 8237 fax: +44 1953 457 722 ?usa: (401) 738-9150 fax: (401) 738 -4389 chip voltage dividers thin film voltage divider resistors features variable ratios chip size: 0.058 inch square resistor material: tantalum nitride, self-passivating oxidized silicon substrate for good power dissipation moisture resistant the ATA voltage divider is a versatile two-resistor tapped chip whose r a /r b ratio can be specified within the values of 1:1 to 20:1. these chips are manufactured using vishay electro-films (efi) sophisticated thin film equipment and manufacturing technology. the ATAs are 100% electrically tested and visually inspected to mil-std-883. standard electrical specifications applications vishay efi ATA voltage divider resistor-ratio chips are designed for the tight ratio tolerances generally required in amplifier feedback circuits. the great range of ratio choices makes them specially suitable for this application. parameter tcr tracking between r a and r b 5ppm/ c noise, mil-std-202, method 308 - 35db typical moisture resistance, mil-std-202, method 106 0.5% maximum ? r/r stability, 1000 hours, + 125 c, 25mw 0.25% maximum ? r/r operating temperature range - 55 c to + 125 c thermal shock, mil-std-202 method 107, test condition f 0.1% maximum ? r/r high temperature exposure + 150 c, 100 hours 0.2% maximum ? r/r dielectric voltage breakdown 200v insulation resistance 10 12 minimum operating voltage 100v maximum dc power rating at + 70 c (derated to zero at 175 c) 50mw per resistor 5 x rated power short-time overload, + 25 c, 5 seconds 0.1% maximum ? r/r temperature coefficient of resistance values and tolerances resistance (r a + r b ) 25k ? tolerances (r a + r b ) 5% greatest ratio (r a /r b ) 20:1 tcr 50ppm/ c product may not be to scale
document number: 61022 revision 14-aug-01 www.vishay.com 120 ATA vishay electro-films vishay electro-films ?france +33.4.93.37.28.24 fax: +33.4.93.37.27.31 ?germany +49.9287.710 fax: +49 9287.70435 ?israel +9 72.3.557.0945 fax: +972.3.558.9121 ?italy + 39.2.300.11911 fax: +39.2.300.11999 ?japan +81.42.729.0661 fax: +81.42.729.3400 ?singapore +65.788.6668 fax: +65. 788.0988 ?sweden +46.8.594.70590 fax: +46.8.594.70581 ?uk +44 191 514 8237 fax: +44 1953 457 722 ?usa: (401) 738-9150 fax: (401) 738 -4389 chip voltage dividers configurations option: gold back for eutectic die attach contact applications engineer parameter chip size 0.058 x 0.058 0.003 (1.47 x 1.47 0.076mm) chip thickness 0.010 0.002 (0.254 0.05mm) chip substrate material oxidized silicon, 10k? minimum sio 2 resistor material tantalum nitride, self-passivating bonding pads 0.005 x 0.005 (0.127 x 0.127mm) number of top pads 3 pad material 10k? minimum aluminum backing none, lapped semiconductor silicon attenuation table ratio temperature part # ATA 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 accuracy tracking ratio r a /r b 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 0.05% 5ppm/ c maximum 2ppm/ c typical attenuator 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0.025% to 2.5ppm/ c to factor 2 3 4 5 6 7 8 9 101112131415161718192021 0.048% 4.8ppm/ c maximum r b /r a + r b 1ppm/ c to 2ppm/ c typical attenuator 1 2 3 4 5 6 7 8 9 10 1 1 12 13 14 15 16 17 18 19 20 0.025% to 2.5ppm/ c to factor 2 3 4 5 6 7 8 9 101112131415161718192021 0.0025% 0.25ppm/ c maximum r a /r a + r b 1ppm/ c to 0.15ppm/ c typical *depends on ratio attenuator factor any ratio r a /r b from 1 to 20 is available to 0.05% rc is a parasitic resistor approximately 5 ? in value, which does not effect the performance of the device when it is used into a high impedence load. = r a r a +r b shaded areas represent bonding pads. r b r c r a r b r a example: 100% visualled, 25k ? , 5%, 100ppm/ c tcr, ratio = 19.0, aluminum pads, class h p/n: w ATA 003 1900 b j inspection product process ratio multiplier tolerance /packaging family code value code code w = 100% visually 003 = class h use first 4 c = 0.001 j = 5.0% inspected parts per 005 = class k significant digits b = 0.01 mil-std-883 of the ratio ra/rb x = sample, visually - any ratio between inspected loaded in matrix 1 to 20 trays (4% aql) ordering information mechanical specifications in inches 1 3 2 thin film voltage divider resistors 1 2 3
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