C31E13.pdf 05.3.14 catalog to prevent smoking and/or burning, Pleaseread readrating ratingand and!CAUTION !CAUTION(for (forstorage, storage,operating, operating,rating, rating,soldering, soldering,mounting mountingand andhandling) handling)ininthis thisPDF catalog to prevent smoking and/or burning, etc. etc. !Note *Please you are requested approvespecifications. our product specifications or to transact approval for product before ordering. *This Thiscatalog cataloghas hasonly onlytypical typicalspecifications. specificationsTherefore, because there is no space fortodetailed Therefore, please approvethe our productsheet specifications or specifications transact the approval sheet for product specifications before ordering. Features (BLM_R Series) The chip ferrite beads BLM series is designed to function nearly as a resistor at noise frequencies, which greatly reduces the possibility of resonance and leaves signal wave forms undistorted. The BLM series is effective in circuits without stable ground lines because the BLM series does not need a connection to ground. The nickel barrier structure of the external electrodes provides excellent solder heat resistance. The BLM_R series can be used in a digital Interface. Resistance of BLM_R series especially grows in the lower frequency range. Therefore BLM_R series is less effective for digital signal waveform at low frequency range and can suppress the ringing. Equivalent Circuit 1 (Resistance element becomes dominant at high frequencies.) BLM18R Series (0603 Size) 0.80.15 0.40.2 1.60.15 0.80.15 BLM18R Series (in mm) Impedance (at 100MHz/20C) (ohm) Rated Current (mA) DC Resistance (max.) (ohm) Operating Temperature Range (C) BLM18RK121SN1 120 25% 200 0.25 -55 to +125 BLM18RK221SN1 220 25% 200 0.30 -55 to +125 BLM18RK471SN1 470 25% 200 0.50 -55 to +125 BLM18RK601SN1 600 25% 200 0.60 -55 to +125 BLM18RK102SN1 1000 25% 200 0.80 -55 to +125 Part Number Impedance-Frequency (Typical) BLM18R Series 1200 BLM18RK601SN1 Impedance () 900 BLM18RK102SN1 BLM18RK471SN1 BLM18RK221SN1 BLM18RK121SN1 600 300 0 1 10 100 1000 Frequency (MHz) 43 C31E13.pdf 05.3.14 catalog to prevent smoking and/or burning, Pleaseread readrating ratingand and!CAUTION !CAUTION(for (forstorage, storage,operating, operating,rating, rating,soldering, soldering,mounting mountingand andhandling) handling)ininthis thisPDF catalog to prevent smoking and/or burning, etc. etc. !Note *Please you are requested approvespecifications. our product specifications or to transact approval for product before ordering. *This Thiscatalog cataloghas hasonly onlytypical typicalspecifications. specificationsTherefore, because there is no space fortodetailed Therefore, please approvethe our productsheet specifications or specifications transact the approval sheet for product specifications before ordering. Impedance-Frequency Characteristics 1 BLM18RK221SN1 400 150 300 Impedance () Impedance () BLM18RK121SN1 200 Z R 100 Z R 200 100 50 X X 0 0 1 10 100 1 1000 10 100 1000 Frequency (MHz) Frequency (MHz) BLM18RK471SN1 BLM18RK601SN1 600 1000 Z 450 750 Z Impedance () Impedance () R 300 150 R 500 250 X X 0 1 10 100 1000 Frequency (MHz) BLM18RK102SN1 Z 900 Impedance () R 600 X 300 0 10 100 Frequency (MHz) 44 1 10 100 Frequency (MHz) 1200 1 0 1000 1000 C31E13.pdf 05.3.14 catalog to prevent smoking and/or burning, Pleaseread readrating ratingand and!CAUTION !CAUTION(for (forstorage, storage,operating, operating,rating, rating,soldering, soldering,mounting mountingand andhandling) handling)ininthis thisPDF catalog to prevent smoking and/or burning, etc. etc. !Note *Please you are requested approvespecifications. our product specifications or to transact approval for product before ordering. *This Thiscatalog cataloghas hasonly onlytypical typicalspecifications. specificationsTherefore, because there is no space fortodetailed Therefore, please approvethe our productsheet specifications or specifications transact the approval sheet for product specifications before ordering. BLM21R Series (0805 Size) 0.850.2 0.50.2 1 1.250.2 2.00.2 EIA CODE : 0805 BLM21R Series (in mm) Impedance (at 100MHz/20C) (ohm) Rated Current (mA) DC Resistance (max.) (ohm) Operating Temperature Range (C) BLM21RK121SN1 120 25% 200 0.15 -55 to +125 BLM21RK221SN1 220 25% 200 0.20 -55 to +125 BLM21RK471SN1 470 25% 200 0.25 -55 to +125 BLM21RK601SN1 600 25% 200 0.30 -55 to +125 BLM21RK102SN1 1000 25% 200 0.50 -55 to +125 Part Number Impedance-Frequency (Typical) BLM21R Series 1200 BLM21RK601SN1 Impedance () 900 BLM21RK102SN1 BLM21RK471SN1 BLM21RK221SN1 BLM21RK121SN1 600 300 0 1 10 100 1000 Frequency (MHz) Impedance-Frequency Characteristics BLM21RK121SN1 BLM21RK221SN1 200 300 150 225 Z R Impedance () Impedance () Z R 100 50 150 75 X X 0 1 10 100 Frequency (MHz) 1000 0 1 10 100 1000 Frequency (MHz) Continued on the following page. 45 C31E13.pdf 05.3.14 catalog to prevent smoking and/or burning, Pleaseread readrating ratingand and!CAUTION !CAUTION(for (forstorage, storage,operating, operating,rating, rating,soldering, soldering,mounting mountingand andhandling) handling)ininthis thisPDF catalog to prevent smoking and/or burning, etc. etc. !Note *Please you are requested approvespecifications. our product specifications or to transact approval for product before ordering. *This Thiscatalog cataloghas hasonly onlytypical typicalspecifications. specificationsTherefore, because there is no space fortodetailed Therefore, please approvethe our productsheet specifications or specifications transact the approval sheet for product specifications before ordering. Continued from the preceding page. Impedance-Frequency Characteristics BLM21RK471SN1 BLM21RK601SN1 1000 600 Z 750 1 R Impedance () Impedance () 450 300 X 150 X 0 1 10 100 1000 BLM21RK102SN1 1200 900 Impedance () Z R 600 X 300 0 10 100 Frequency (MHz) 1 10 100 Frequency (MHz) Frequency (MHz) 46 R 250 0 1 Z 500 1000 1000 C31E13.pdf 05.3.14 catalog to prevent smoking and/or burning, Pleaseread readrating ratingand and!CAUTION !CAUTION(for (forstorage, storage,operating, operating,rating, rating,soldering, soldering,mounting mountingand andhandling) handling)ininthis thisPDF catalog to prevent smoking and/or burning, etc. etc. !Note *Please you are requested approvespecifications. our product specifications or to transact approval for product before ordering. *This Thiscatalog cataloghas hasonly onlytypical typicalspecifications. specificationsTherefore, because there is no space fortodetailed Therefore, please approvethe our productsheet specifications or specifications transact the approval sheet for product specifications before ordering. EMI Suppression Effect !Waveform Distortion Suppressing Performance of BLM--R Series Noise Suppression Effect of BLM_R Series [Measuring Circuits] Measuring Point AC04 1MHz AC00 Filter 1 Pattern 20cm EMI Suppression Effect / Description Type of Filter Signal waveform (100nsec/div, 2V/div) Expand (10nsec/div, 2V/div) Spectrum 85 Level (dB V) 80 Initial (No filter) 75 70 65 60 55 50 45 30 50 100 150 200 250 Frequency (MHz) 300 150 200 250 Frequency (MHz) 300 150 200 250 Frequency (MHz) 300 Ringing is caused on the signal waveform. Such ringing contains several hundred MHz harmonic components and generates noise. Signal waveform (100nsec/div, 2V/div) Expand (10nsec/div, 2V/div) Spectrum 85 Level (dB V) 80 Resister (47) is used 75 70 65 60 55 50 45 30 50 100 Comparing initial waveform, ringing is suppressed a little. However there still remains high level waveform distortion. Signal waveform (100nsec/div, 2V/div) Expand (10nsec/div, 2V/div) Spectrum 85 BLM18RK221SN1 (220 at 100MHz) is used Level (dB V) 80 75 70 65 60 55 50 45 30 50 100 BLM18R has excellent performance for noise suppression and waveform distortion suppression. BLM18R suppresses drastically not only spectrum level in more than 100MHz range but waveform distortion. 47