7 Electrical Data ID Code Inductance Value at C (-/+%) Less than % performance variations versus temperature (- C / + C) Minimum impedance attenuation : Ω from khz to MHz Compact SMD package (x pins) Applied standards : MIL-STD-, ECSS-Q-7-, DO- Materials meet UL9-V rating Thermal index according to IEC : H ( C) Operating/storage temperature range : - C to + C Approx weight : grams MAX RMS Current for MAX DC Resistance ( C) CMC M WR µh 7. A.7 mω CMC M WR µh. A. mω CMC M9 WR 7 µh.7 A. mω CMC M WR µh. A. mω CMC M7 WR 7 µh. A 7. mω CMC M99 WR 99 µh. A. mω CMC M WR µh. A. mω CMC M WR µh. A. mω CMC M WR µh. A 9. mω Typical Dimensions (mm, top view) CMC Common Mode Chokes Series Notes. Dielectric strength test : v (Hz- min). Max power dissipation at + C : mw. Heat increase at Max current C. : ratio (sector wound construction). Interwinding capacitances < pf. Variation of «L» values over the working temperature range % 7. Admissible temp. during reflow soldering : + C / seconds Connections - -. ±.. to. µm - 7- /. PCB Layout (suggested). x. x.7. ±...7. ±. Pin.. Packaging Tape and Reel: units per reel of diameter mm Marking CM xxx So W Unreeling P Po P: Po:. W:. So: none xr yywwp yyww : Date code Tel : + () 9 www.microspire.com Specifications may change without prior notice - Revised /9
Electrical Data ID Code Inductance Value at C (-/+%) CMC 7 Common Mode Chokes Series Less than % performance variations versus temperature (- C / + C) Minimum impedance attenuation : Ω from khz to MHz Compact SMD package (x pins) Applied standards : MIL-STD-, ECSS-Q-7-, DO- RMS current range : from. A to.7 A for C heating above C Materials meet UL9-V rating Thermal index according to IEC : H ( C) Operating/storage temperature range : - C to + C Approx weight : grams Typical SRF Max Impedance (Typical) Max Attenuation (Z = Ω) MAX RMS Current for MAX DC Resistance ( C) Typical Leakage Inductance (khz) CMC7 M WR. mh MHz kω db.7 A mω. µh CMC7 M WR. mh MHz.9 kω db. A mω. µh CMC7 M WR.9 mh MHz.7 kω db A mω. µh CMC7 M WR. mh. MHz. kω db A mω. µh CMC7 M WR. mh. MHz 9. kω db.7 A 9 mω. µh CMC7 M WR. mh. MHz. kω db.7 A mω µh CMC7 9M WR 9. mh. MHz 9 kω 9 db. A mω 7 µh Typical Dimensions (mm, top view) Notes. Dielectric strength test : v (Hz - min). : ratio (sector wound construction). ±. Connections. to µm. ±.. x. x. 7. ±. PCB Layout (suggested). 7. ±. Pin x... Packaging Tape and Reel: units per reel of diameter mm Marking Unreeling P Po So W P: Po:. W:. So: none xr yywwp CM 7 xxx yyww : Date code Tel : + () 9 www.microspire.com Specifications may change without prior notice - Revised /9
9 CMC 7 Common Mode Chokes Series IMPEDANCE (kω),, Impedance 9M M M M M M M CMC7,, FREQUENCY (MHz) ATTENUATION (db) Attenuation CMC7 9M M M M M M M,, FREQUENCY (MHz) Typical values at C with mt at khz Typical values ( Z = Ω ) at C with mt at khz L/L (%) Variation vs Temperature % % % % % % % -% -% -% -% CMC7 range Standard MnZn ferrite High perm ferrite -7 - - 7 7 Operating Temperature ( C) Change in inductance value ( < mt at khz ) Attenuation Measurement Circuit CMC Ω Ω SIN VTEST Ω VDUAL Ω VREF Att. (db) = log VTEST VREF CMC7 range uses very high performance materials and therefore, offers remarkable temperature stability figures compared to standard or high-perm ferrite cores. Tel : + () 9 www.microspire.com Specifications may change without prior notice - Revised /
CMC 7 Common Mode Chokes Series Derating Curves T = 9 C T = C CMC7 M T = C T = C 7 9 T = 9 C T = C CMC7 M T = C T = C 7 9 T = 9 C T = C CMC7 M T = C T = C 7 9 T = 9 C 7 9 T = C CMC7 M T = C T = C CMC7 M T = 9 C T = C T = C T = C,,, T = 9 C T = C CMC7 M T = C T = C 7 9,, T = 9 C T = C CMC7 9M T = C T = C 7 9 7 9 All thermal measurements under atmospheric conditions with component mounted on dm PCB without cooling device. All above graphs indicate maximum RMS current allowed through component v. ambient temperature for a defined T. Maximum operating temperature is + C. Example : CMC7 M for application with Tamb = + C Max current allowed is < Arms with T < C. If temp increase allowed in application is limited to T < C, current must be reduced to Arms. Tel : + () 9 www.microspire.com Specifications may change without prior notice - Revised /
Technical note - Appendix CMC - - & CMC 7 Temperature Application The operating temperature announced in the datasheets takes into account maximum ambient temperature around the component + its self heating temperature in operation. Typical T range is - C + C for usual embedded applications (avionics, defence, space...) in order to ensure a good ageing of the products. Microspire guarantees an extended lifetime in this operational T range, because only high temperature class materials are used and offer sufficient safety margin: all plastic materials used are H class according to IEC standard ( C during. hours ) and magnetic cores show a high Curie temperature value ( Tc > C ). Typical values for admissible current at + C ambient for a C nominal temperature increase are defined without any heatsink in our litterature. When using an appropriate cooling device, these values can be slightly increased The associated derating curves allow to check maximum current possible in the component versus acceptable temperature increase above ambient temperature of the application. Example.7A 9.7A CMC K AREA WHERE OPERATING T = 9 C TEMPERATURE IS > + C T = C EXTENDED LIFETIME GUARANTEED AREA T = C T= C 7 9 In this example, CMC K is chosen for an application at Tamb = + C. Max recommended RMS current is then < A with T < C. If temperature increase in the application is limited to T < C. current value must be reduced to < A. MAX OPERATING TEMP (GUARANTEED) With the above data, it is clear that the «theoretical» maximum possible current reaches zero for + C ambient temperature (because heating above is not recommended)! However, it still remains possible to load the component with current leading to operating temperature greater than + C but in this case, extended lifetime for the product is not guaranteed any longer. Heating values versus current above + C operating temperature can still be calculated upon request. Tel : + () 9 www.microspire.com Specifications may change without prior notice - Revised /