VCS232Z (z-foil technology) vishay foil resistors document number: 63095 for technica l questions, contact: foil@vishay.com www.vishay.com revision: 08-aug-06 111 ultra high precision z-foil power current sensing resistor with absolute tcr of 0.05 ppm/c and load life stability to 0.005% sales ? americas: foilsales.usa@vishay.com ? asia/japan: foilsales.asia@vishay.com ? uk/holland/scandinavia: foilsales.eunorth@vishay.com ? germany/czech republic/austria: foilsales.eucentral@vishay.com ? france/switzerland/southern eu rope: foilsales.eusouth@vishay.com ? israel: foilsales.israel@vishay.com new pr oduct any value at any tolerance available with resistance range introduction VCS232Z is the industry?s first device to prove high rated power, excellent load life stability along with low tcr and all in one resistor. the new z-foil technology provides a significant reduction of the resistive component s sensitivity to ambient temperature variations (tcr) and applied power changes (pcr). the latest development in foil resistors technology have reduced the temperature coefficient of resistance (tcr), to below 0.2 ppm/c (part per million per degree centigrade). 0.05 ppm/c absolute tcr removes error due to temperature gradients. by taking advantage of the overall stability and reliability of vishay bulk metal ? z-foil resistors, designers can significantly reduce circuit erro rs and greatly improve overall circuit performances. model VCS232Z is a 4 lead kelvin connected device. our application engineering department is available to advise and make recommendations for non-standard technical requirements and special applications. please contact us. features ? temperature coefficient of resistance (tcr): 0.05 ppm/c (industrial range) 0.2 ppm/c (mil range) ? resistance range: 0.25 to 500 ? power coefficient ? r due to self heating?: 4 ppm/w typical ? load life stability: < 0.005% 2w at 25c for 2000 hours ? power rating @ + 25c: 2 watts ? tolerance: to 0.02% ? electrostatic discharge (esd) above 25 000 volts ? short time overload 0.005% ? non hot spot design ? thermal emf: 0.05v/c ? rise time: 1ns without ringing ? current noise < - 40db ? non inductive/capacitive design ? voltage coefficient < 0.1 ppm/v ? thermal finishes available lead (pb)-free tin/lead alloy ? maximum current: 3 amps ? for better performances please contact us applications ? automatic test equipment (ate) ? high precision instrumentation ? electron beam application ? current sensing applications ? pulse applications ? military ? power amplifier ? power supplies figure 1 - trimming to values (conceptual illustration) product may not be to scale c u rrent path after trimming 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 a v aila b le p b -free rohs* compliant * pb containing terminations are not rohs compliant, exemptions may apply figure 2 - dimensions in inches (millimeters) dimensions - maximum inches (mm) - unless otherwise noted model l h w ll (minimum) ls 0.20 ( 0.5) lt 0.20 ( 0.5) d 1 (nominal) d 2 (nominal) VCS232Z 1.240 (32.0) 0.512 (13.0) 0.177 (4.50) 0.500 (12.7) 0.688 (17.5) 1.083 (27.5) 0.040 (1.00) 0.032 (0.80) lt h l w ll d 1 ls d 2 tin/lead or lead (pb)-free solder coated copper leads through hole i 1 e 1 e 2 i 2
VCS232Z (z-foil technology) vishay foil resistors ultra high precision z-foi l power current sensing resistor with absolute tcr of 0.05 ppm/c and load life stabili ty to 0.005% www.vishay.com for technical ques tions, contact: foil@vishay.com document number: 63095 112 revision: 08-aug-06 sales ? americas: foilsales.usa@vishay.com ? asia/japan: foilsales.asia@vishay.com ? uk/holland/scandinavia: fo ilsales.eunorth@vishay.com ? germany/czech republ ic/austria: foilsales.eucentral@vishay.com ? france/switzerland/southern eu rope: foilsales.eusouth@vishay.com ? israel: foilsales.israel@vishay.com new pr oduct * measurement error 0.0005r weight = 1.2 gms maximum * mil-range (- 55c to + 125c, + 25c ref.) contact applications engineeri ng for other available values * specify the resistance value for each resistor of the network - even if all values are the same. example: VCS232Zt1r0000tcr0.2ab model: VCS232Z (z-foil) value: r1 = 1 termination: lead (pb)-free tcr0.2: 0.2 ppm/c typical refers to any value in the resistance range tolerance: absolute = 0.05% packaging: bulk pack table 1 - performances* test or condition typical r maximum r low temperature storage 24 hours @ - 55 c 0.002% (20 ppm) 0.005% (50 ppm) short time overload 6.25 x rated power 0.002% (20 ppm) 0.005% (50 ppm) dwv 0.002% (20 ppm) 0.005% (50 ppm) moisture resistance 0.01% (100 ppm) 0.02% (200 ppm) terminal strength 0.002% (20 ppm) 0.005% (50 ppm) load life (2 watt, + 25c, 2000 hours) 0.005% (50 ppm) 0.01% (100 ppm) high temperature exposure 2000 hours @ + 150 c 0.01% (100 ppm) 0.02% (200 ppm) figure 3 - power derating curve table 2 - VCS232Z resistance range ( ) tightest resistance tolerance typical tcr and max. spread (ppm/c)* 0.25 to < 10 0.05% 0.2 ppm/c 2.8 ppm/c 10 to 500 0.02% 0.2 ppm/c 1.8 ppm/c (further derating not necessary) + 100 + 75 + 50 + 25 0 - 50 0 + 50 + 100 + 150 + 200 ambient temperature ( c) f o t n e c r e p r e w o p d e t a r - 55 c + 25 c figure 4 - typical tcr curve z-foil (for more details see table 2) + 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 table 3 - ordering information model resistance value termination absolute tcr absolute tolerance packaging VCS232Z resistance range letter designator multiplier factor t = lead (pb)-free none = tin/lead alloy tcr0.2 q = 0.02% a = 0.05% b = 0.1% c = 0.25% d = 0.5% f = 1% b = bulk 0.25 to < 500 rx 1.0 example: 249r00 = 249 through hole
legal disclaimer notice vishay document number: 91000 www.vishay.com revision: 08-apr-05 1 notice specifications of the products displayed herein are subjec t to change without notice. vishay intertechnology, inc., or anyone on its behalf, assume s no responsibility or liability fo r any errors or inaccuracies. information contained herein is intended to provide a product description only. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. except as provided in vishay's terms and conditions of sale for such products, vishay assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and /or use of vishay products including liab ility or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyrigh t, or other intellectual property right. the products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify vishay for any damages resulting from such improper use or sale.
|
