sales and corporate offce 1717 chicago avenue riverside, california 92507-2364 phone: (951) 788-1700 fax: (951) 369-1151 applications engineering 17271 north umpqua hwy. roseburg, oregon 97470-9422 phone: (541) 496-0700 fax: (541) 496-0408 ? 2003-2007 caddock electronics, inc. e-mail: caddock@caddock.com ? web: www.caddock.com for caddock distributors listed by country see caddock.com/contact/dist.html 28_il117.1004 cd2015fc standard resistance values: tolerance cd2015fc 1% standard. cd2520fc standard resistance values: 0.010 0.015 0.020 0.025 tolerance cd2520fc 1% standard. 0.030 0.033 0.040 0.050 0.075 0.10 0.20 custom resistance values and non-standard tolerances can be manufactured for high quantity applications. please contact caddock applications engineering. recommended circuit board layout (current and sense connections): fig. 1a: recommended kelvin layout. 0.20 0.010 model resistance min. max. power capability information cd2015fc cd2520fc 0.20 0.010 150 c 1.0 watt max. chip temperature general applications high power applications thermal resistance - r jc film (j) to solder pad (c) (see note 2) 12.0c/watt power rating at 70 c (see note 1) 9.0c/watt 150 c dimensions in inches and (millimeters) .200 .012 (5.08 .30 a b d .150 .012 (3.81 .30) .062 min. (1.57 min.) c .063 .006 (1.60 .15) .250 .012 (6.35 .30) .200 .012 (5.08 .30) .078 min. (1.98 min.) .063 .006 (1.60 .15 comments solderable pedestal solderable pedestal 1.5 watts type cd low resistance precision chip resistors style fc - flip chip version is a surface mount version with solderable pedestal terminals for fip chip soldering. note 1: general applications - the power rating for general applications is based upon 0.5 sq. in. (300 mm 2 ) of termination pad or trace area (2 oz. copper) connected to each end of the resistor. maximum chip temperature is 150c. use derating curve to derate appropriately for the maximum ambient temperature and for the temperature limitations of the adjacent materials. note 2: thermal resistance - in high power applications where the circuit board material provides high heat sinking benefts (such as ims, alumina, or other) the thermal resistance of the chip resistor is useful to establish the maximum power capability of the chip resistor in the application. the flm temperature is measured at the center of the resistor element and solder pad temperature at the center of the solderable pedestal (point x in the recommended circuit layout shown below). maximum temperature of the chip resistor (at the center of chip) should not exceed 150c through the temperature range of the application . style fc derating curve for general applications ambient temperature, c ra ted load, % o 100 80 60 40 20 0 25 100 150 70 c = current connection s = sense connection note: actual width of current trace is based on magnitude of current. point of connection should be in the area shown. low resistance chip down to 0.010 at 1% with unique pedestal terminal design for current sense in hybrid and smt applications 0.010 0.015 0.020 0.025 0.030 0.033 0.040 0.050 0.075 0.10 0.20 s s x x c c type cd low resistance precision chip resistors utilize the proven caddock micronox ? resistance flms to achieve the unique low resistance range in this family. the special performance features of the type cd low resistance precision film resistor include: ? style fc - flip chip version for surface mount applications. style wb - wire bond version for hybrid applications with metallized back surface for solder down heat sinking of the chip, includes bondable termination pedestals to receive aluminum wire bonds. ? resistance as low as 0.010 ohm at 1%. ? pedestal terminals in this design provide an ultra low resistance connection pad which maintains the precision 0.010 1% at the point of customer kelvin connection to the resistor chip. the pedestal terminal with its copper core also provides heat spreading which enhances the high power handling capability. ? thermal resistance is provided to optimize high power designs when utilizing higher thermal conductivity circuit board substrates such as ims or alumina. ? high pulse handling and overload capability . ? low inductance provides excellent high frequency and pulse response. page 1 of 2 ca d k do c electronics, inc.
sales and corporate offce 1717 chicago avenue riverside, california 92507-2364 phone: (951) 788-1700 fax: (951) 369-1151 applications engineering 17271 north umpqua hwy. roseburg, oregon 97470-9422 phone: (541) 496-0700 fax: (541) 496-0408 e-mail: caddock@caddock.com ? web: www.caddock.com for caddock distributors listed by country see caddock.com/contact/dist.html ? 2003-2007 caddock electronics, inc. 28_il117.1004 is a hybrid mountable version with copper pedestal terminals and an aluminum surface layer for wire bonding. the back surface of these devices is metallized for solder attachment of the chip resistor to a heat sinking substrate. specifcations: temperature coeffcient: tc referenced to +25c, ? r taken at +150c. 0.050 ohm to 0.20 ohm, 0 to +100 ppm/c. 0.010 ohm to 0.049 ohm, 0 to +200 ppm/c. inductance: less than 5 nh typical. load life: 1000 hours at rated power, based upon 150c max. chip temperature, ? r (0.5% + 0.0005 ohm). momentary overload: 1.5 times rated power, for 5 seconds, ? r (0.5% + 0.0005 ohm). operating temperature: -55c to +150c. measurement note: all measurements are taken using kelvin connections per the recommended connection locations. ordering information: ko signifies tape thickness and dimension 12mm 0.473? ao bo 7? dia. (178 mm) .512? arbor hole (13mm) packaging information: style fc, fip chip resistors, are shipped with the bare ceramic side up in the pocket, with the solderable pedestals facing down. style wb, wire bondable resistors, are shipped with the wire bondable pedestals facing up in the pocket. the illustration shows the orientation of the cd2015 chip resistors in the tape. the cd2520 chip resistors are rotated 90 from what is shown in the illustration. style wb - wire bond version note 3: thermal resistance - in high power applications where the circuit board material provides high heat sinking benefts (such as ims, alumina, or other) the thermal resistance of the chip resistor is useful to establish the maximum power capability of the chip resistor in the application. the flm temperature is measured at the center of the resistor element and the solder pad temperature is measured at the soldered interface with the circuit board. maximum temperature of the chip resistor (at the center of chip) should not exceed 150c through the temperature range of the application. wb resistor mounting circuit board: ims, ceramic (alumina) , or other. sense wire current wire film temperature measuring point solder pad, soldered interface with circuit board. sense wire current wire location for sense (potential) connection: general information for type cd - style fc and style wb - chip resistors solder attachment notes: during soldering of the type cd resistor the soldering temperature profle must not cause the pedestal terminals of this device to exceed 220c. style fc - flip chip version resistors have a bare ceramic back surface. the recommended solder for flip chip solder attachment is 62sn / 36pb / 2ag. style wb - wire bond version resistors have a metallized back surface for soldering to a substrate or a heat sink. the recommended solder is 62sn / 36pb / 2ag. model resistance min. max. power capability information max. chip temperature thermal resistance r jc film (j) to solder pad (c) (see note 3) dimensions in inches and (millimeters) a b d c comments 8.33c/watt 150c .200 .012 (5.08 .30) .150 .012 (3.81 .30) .062 min. (1.57 min.) .061 .005 (1.55 .13) terminals have an aluminum surface layer for wire bonding. aluminum wire to be used for bonding. CD2015WBA 0.20 0.010 cd2520wba 0.20 0.010 5.00c/watt 150c .250 .012 (6.35 .30) .200 .012 (5.08 .30) .078 min. (1.98 min.) .061 .005 (1.55 .13) terminals have an aluminum surface layer for wire bonding. aluminum wire to be used for bonding. custom resistance values and non-standard tolerances can be manufactured for high quantity applications. please contact caddock applications engineering. cd 2520 fc - 0.10 - 1% type cd physical size 2015 = 0.200? x 0.150? 2520 = 0.250? x 0.200? style: fc or wba resistor value () see charts for availability tolerance: 1% 0.010 and above. full reel quantities: 1000 pieces per reel for cd2015 and cd2520 quantities of less than 250 will be shipped in tape without reel and without tape leader at the option of caddock. tape dimensions and materials will be consistent with eia-481-1. reels will be marked with a label containing caddock logo, part number, resistor value, tolerance, packaging date, and quantity. dimensions in inches and (millimeters) d a b c carrier tape and pocket dimensions: tape is 12mm carrier tape (8mm pitch) 0.189? (4.80mm) size 2015 0.209? (5.31mm) 0.087? (2.21mm) 0.271? (6.88mm) size 2520 0.216? (5.49mm) 0.066? (1.68mm) ao bo ko note: the sense connection for each pedestal is positioned inboard of the current connection (single or multiple current wires). tolerance CD2015WBA 1% standard. CD2015WBA standard resistance values: 0.010 0.015 0.020 0.025 0.030 0.033 0.040 0.050 0.075 0.10 0.20 tolerance cd2520wba 1% standard. cd2520wba standard resistance values: 0.010 0.015 0.020 0.025 0.030 0.033 0.040 0.050 0.075 0.10 0.20 type cd low resistance precision chip resistors page 2 of 2 electronics, inc.
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