? semiconductor components industries, llc, 2013 september, 2013 ? rev. 2 1 publication order number: nuf84100mn/d nuf8410mn 8-channel emi filter with integrated esd protection the nuf8410mn is an eight ? channel (c ? r ? c) pi ? style emi filter array with integrated esd protection. its typical component values of r = 100 and c = 8.5 pf deliver a cutoff frequency of 250 mhz and stop band attenuation greater than ? 20 db from 800 mhz to 3.0 ghz. this performance makes the part ideal for parallel interfaces with data rates up to 167 mbps in applications where wireless interference must be minimized. the specified attenuation range is very effective in minimizing interference from 2g/3g, gps, bluetooth ? and wlan signals. the nuf8410mn is available in the low ? profile 16 ? lead 1.6 mm x 4.0 mm dfn16 surface mount package. features/benefits ? 8.0 kv esd protection on each channel (iec61000 ? 4 ? 2 level 4, contact discharge) ? r/c values of 100 and 8.5 pf deliver exceptional s21 performance characteristics of 250 mhz f 3db and ? 20 db stop band attenuation from 800 mhz to 3.0 ghz ? integrated emi/esd system solution in dfn package offers exceptional cost, system reliability and space savings ? this is a pb ? free device applications ? emi filtering for lcd and camera data lines ? emi filtering and protection for i/o ports and keypads figure 1. electrical schematic see table 1 for pin description c d = 8.5 pf c d = 8.5 pf r = 100 filter + esd n filter + esd n figure 2. insertion loss characteristic ? 45 ? 40 ? 30 ? 20 ? 10 0 frequency (hz) s21 (db) 1.0e+6 1.0e+7 1.0e+8 1.0e+9 1.0e+10 ? 35 ? 25 ? 15 ? 5 device package shipping ? ordering information NUF8410MNT4G dfn16 (pb ? free) 4000 / tape & reel marking diagram http://onsemi.com ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our t ape and reel packaging specifications brochure, brd8011/d. http://onsemi.com dfn16 case 506ac 1 16 840 = specific device code a = assembly location y = year w = work week = pb ? free package 840 ayw (*note: microdot may be in either location) *date code orientation and/or position may vary depending upon manufacturing location.
nuf8410mn http://onsemi.com 2 figure 3. pin diagram 4 3 2 1 (bottom view) gnd 9 10 11 12 8 7 6 5 13 14 15 16 table 1. functional pin description filter device pins description filter 1 1 & 16 filter + esd channel 1 filter 2 2 & 15 filter + esd channel 2 filter 3 3 & 14 filter + esd channel 3 filter 4 4 & 13 filter + esd channel 4 filter 5 5 & 12 filter + esd channel 5 filter 6 6 & 11 filter + esd channel 6 filter 7 7 & 10 filter + esd channel 7 filter 8 8 & 9 filter + esd channel 8 ground pad gnd ground maximum ratings parameter symbol value unit esd discharge iec61000 ? 4 ? 2 contact discharge v pp 8.0 kv operating temperature range t op ? 40 to 85 c storage temperature range t stg ? 55 to 150 c maximum lead temperature for soldering purposes (1.8 in from case for 10 seconds) t l 260 c stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above t he recommended operating conditions is not implied. extended exposure to stresses above the recommended operating conditions may af fect device reliability. electrical characteristics (t j = 25 c unless otherwise noted) parameter symbol test conditions min typ max unit maximum reverse working voltage v rwm 5.0 v breakdown voltage v br i r = 1.0 ma 6.0 7.0 8.0 v leakage current i r v rwm = 3.3 v 100 na resistance r a i r = 20 ma 85 100 115 diode capacitance c d v r = 2.5 v, f = 1.0 mhz 8.5 11 pf line capacitance c l v r = 2.5 v, f = 1.0 mhz 17 22 pf 3 db cut ? off frequency (note 1) f 3db above this frequency, appreciable attenuation occurs 250 mhz 6 db cut ? off frequency f 6db above this frequency, appreciable attenuation occurs 395 mhz 1. 50 source and 50 load termination.
nuf8410mn http://onsemi.com 3 typical performance curves (t a = 25 c unless otherwise specified) 90 92 94 96 98 100 102 104 106 108 110 ? 40 ? 200 20406080 figure 4. insertion loss characteristic temperature ( c) resistance ( ) figure 5. typical capacitance figure 6. typical resistance over temperature ? 45 ? 40 ? 30 ? 20 ? 10 0 frequency (hz) s21 (db) 1.0e+6 1.0e+7 1.0e+8 1.0e+9 1.0e+10 ? 35 ? 25 ? 15 ? 5 0 0.4 0.8 1.2 1.6 0 1.0 2.0 3.0 4.0 5.0 reverse voltage (v) normalized capacitance 0.2 0.6 1.0 1.4
nuf8410mn http://onsemi.com 4 theory of operation the nuf8410mn combines esd protection and emi filtering conveniently into a small package for today?s size constrained applications. the capacitance inherent to a typical protection diode is utilized to provide the capacitance value necessary to create the desired frequency response based upon the series resistance in the filter. by combining this functionality into one device, a large number of discrete components are integrated into one small package saving valuable board space and reducing bom count and cost in the application. application example the accepted practice for specifying bandwidth in a filter is to use the 3 db cutoff frequency. utilizing points such as the 6 db or 9 db cutoff frequencies results in signal degradation in an application. this can be illustrated in an application example. a typical application would include emi filtering of data lines in a camera or display interface. in such an example it is important to first understand the signal and its spectral content. by understanding these things, an appropriate filter can be selected for the desired application. a typical data signal is pattern of 1?s and 0?s transmitted over a line in a form similar to a square wave. the maximum frequency of such a signal would be the pattern 1-0-1-0 such that for a signal with a data rate of 100 mbps, the maximum frequency component would be 50 mhz. the next item to consider is the spectral content of the signal, which can be understood with the fourier series approximation of a square wave, shown below in equations 1 and 2 in the fourier series approximation. from this it can be seen that a square wave consists of odd order harmonics and to fully construct a square wave n must go to infinity. however, to retain an acceptable portion of the waveform, the first two terms are generally suf ficient. these two terms contain about 85% of the signal amplitude and allow a reasonable square wave to be reconstructed. therefore, to reasonably pass a square wave of frequency x the minimum filter bandwidth necessary is 3x . all on semiconductor emi filters are rated according to this principle. attempting to violate this principle will result in significant rounding of the waveform and cause problems in transmitting the correct data. for example, take the filter with the response shown in figure 7 and apply three different data waveforms. to calculate these three different frequencies, the 3 db, 6 db, and 9 db bandwidths will be used. equation 1: x(t) 1 2 2 a n 1 1 2n 1 sin((2n 1) 0 t) (eq. 1) equation 2 (simplified form of equation 1): x(t) 1 2 2 sin( 0 t) 1 sin(3 0 t) 3 sin(5 0 t) 5 (eq. 2) magnitude (db) frequency (hz) 100k 1m 100m 1g 10g 10m figure 7. filter bandwidth ? 3 db ? 6 db ? 9 db f 1 f 2 f 3 from the above paragraphs it is shown that the maximum supported frequency of a waveform that can be passed through the filter can be found by dividing the bandwidth by a factor of three (to obtain the corresponding data rate multiply the result by two). the following table gives the bandwidth values and the corresponding maximum supported frequencies and the third harmonic frequencies.
nuf8410mn http://onsemi.com 5 table 2. frequency chart bandwidth maximum supported frequency third harmonic frequency 3 db ? 100 mhz 33.33 mhz (f 1 ) 100 mhz 6 db ? 200 mhz 66.67 mhz (f 2 ) 200 mhz 9 db ? 300 mhz 100 mhz (f 3 ) 300 mhz considering that 85% of the amplitude of the square is in the first two terms of the fourier series approximation most of the signal content is at the fundamental (maximum supported) frequency and the third harmonic frequency. if a signal with a frequency of 33.33 mhz is input to this filter, the first two terms are suf ficiently passed such that the signal is only mildly affected, as is shown in figure 8a. if a signal with a frequency of 66.67 mhz is input to this same filter, the third harmonic term is significantly attenuated. this serves to round the signal edges and skew the waveform, as is shown in figure 8b. in the case that a 100 mhz signal is input to this filter, the third harmonic term is attenuated even further and results in even more rounding of the signal edges as is shown in figure 8c. the result is the degradation of the data being transmitted making the digital data (1?s and 0?s) more difficult to discern. this does not include effects of other components such as interconnect and other path losses which could further serve to degrade the signal integrity. while some filter products may specify the 6 db or 9 db bandwidths, actually using these to calculate supported frequencies (and corresponding data rates) results in significant signal degradation. to ensure the best signal integrity possible, it is best to use the 3 db bandwidth to calculate the achievable data rate. figure 8. input and output waveforms of filter input waveform output waveform input waveform output waveform input waveform output waveform a) frequency = f 1 b) frequency = f 2 c) frequency = f 3
nuf8410mn http://onsemi.com 6 package dimensions dfn16, 4x1.6, 0.5p case 506ac issue d notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension b applies to terminal and is measured between 0.25 and 0.30 mm from terminal. 4. coplanarity applies to the exposed pad as well as the terminals. dim min max millimeters a 0.80 1.00 a1 0.00 0.05 a3 0.20 ref b 0.18 0.30 d 4.00 bsc d2 3.10 3.30 e 1.60 bsc e2 0.30 0.50 e 0.50 bsc k 0.20 ??? l 0.20 0.40 0.15 c d e b a 2x 2x 16x a a1 (a3) 0.15 c pin one reference 0.08 c 0.10 c c seating plane d2 e2 bottom view b e 16x 0.10 b 0.05 a c c l 16x k 16x side view top view note 3 18 9 16 2x 0.25 x 0.40 mm test pad size (a3) 0.50 4.10 0.50 pitch 1.91 0.51 16x 0.28 16x *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint* detail a l1 detail a l optional construction l1 0.00 0.15 dimension: millimeters recommended on semiconductor and are registered trademarks of semiconductor co mponents industries, llc (scillc). scillc owns the rights to a numb er of patents, trademarks, copyrights, trade secrets, and other inte llectual property. a listing of scillc?s pr oduct/patent coverage may be accessed at ww w.onsemi.com/site/pdf/patent ? marking.pdf. scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and s pecifically disclaims any and all liability, including without limitation special, consequential or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/ or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including ?typical s? must be validated for each customer application by customer?s technical experts. scillc does not convey any license under its patent rights nor the right s of others. scillc products are not designed, intended, or a uthorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in whic h the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or us e scillc products for any such unintended or unauthorized appli cation, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unin tended or unauthorized use, even if such claim alleges that scil lc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyrig ht laws and is not for resale in any manner. publication ordering information n. american technical support : 800 ? 282 ? 9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81 ? 3 ? 5817 ? 1050 nuf8410mn/d bluetooth is a registered trademark of bluetooth sig. literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 303 ? 675 ? 2175 or 800 ? 344 ? 3860 toll free usa/canada fax : 303 ? 675 ? 2176 or 800 ? 344 ? 3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your local sales representative
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