? semiconductor components industries, llc, 2017 february, 2017 ? rev. 8 1 publication order number: NUF4001MU/d NUF4001MU 4-channel emi filter with integrated esd protection the NUF4001MU is a four?channel (c?r?c) pi?style emi filter array with integrated esd protection. its typical component values of r = 100 and c = 13 pf deliver a cutoff frequency of 150 mhz and stop band attenuation greater than ?25 db from 800 mhz to 5.0 ghz. this performance makes the part ideal for parallel interfaces with data rates up to 100 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 NUF4001MU is available in the low?profile 8?lead 1.2x1.8mm udfn8 surface mount package. features/benefits ? 14 kv esd protection on each channel (iec61000?4?2 level 4, contact discharge) ? 16 kv esd protection on each channel (hbm) ? r/c values of 100 and 13 pf deliver exceptional s21 performance characteristics of 150 mhz f 3db and ?25 db stop band attenuation from 800 mhz to 5.0 ghz ? integrated emi/esd system solution in udfn package offers exceptional cost, system reliability and space savings ? these devices are pb?free, halogen free/bfr free and are rohs compliant applications ? emi filtering for lcd and camera data lines ? emi filtering and protection for i/o ports and keypads figure 1. electrical schematic figure 2. typical insertion loss curve see table 1 for pin description c d = 13 pf c d = 13 pf r=100 filter + esd n filter + esd n ?50 ?40 ?35 ?30 ?25 ?20 ?15 ?10 ?5 0 1.0e+6 10.0e+6 100e+6 1.0e+9 10.0e+ 9 frequency (hz) s21 (db) ?45 udfn8 case 517ad device package shipping ? ordering information NUF4001MUt2g udfn8 (pb?free) 3000 / tape & ree l marking diagram www. onsemi.com 41 = specific device code m = month code = pb?free package ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our t ape and reel packaging specification s brochure, brd8011/d. 1 8 41 m 1
NUF4001MU www. onsemi.com 2 figure 3. pin diagram (bottom view) 14 5 8 table 1. functional pin description filter device pins description filter 1 1 & 8 filter + esd channel 1 filter 2 2 & 7 filter + esd channel 2 filter 3 3 & 6 filter + esd channel 3 filter 4 4 & 5 filter + esd channel 4 ground pad gnd ground maximum ratings parameter symbol value unit esd discharge iec61000?4?2 contact discharge machine model human body model v pp 14 1.6 16 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 those listed in the maximum ratings table may damage the device. if any of these limits are exceeded, device function ality should not be assumed, damage may occur and reliability may be affected. 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 = 10 ma 85 100 115 diode capacitance c d v r = 2.5 v, f = 1.0 mhz 10 13 16 pf line capacitance c l v r = 2.5 v, f = 1.0 mhz 20 26 32 pf 3 db cut?off frequency (note 1) f 3db above this frequency, appreciable attenuation occurs 150 mhz 6 db cut?off frequency (note 1) f 6db above this frequency, appreciable attenuation occurs 260 mhz product parametric performance is indicated in the electrical characteristics for the listed test conditions, unless otherwise noted. product performance may not be indicated by the electrical characteristics if operated under different conditions. 1. 50 source and 50 load termination.
NUF4001MU www. onsemi.com 3 typical performance curves (t a = 25 c unless otherwise specified) ?50 ?40 ?35 ?30 ?25 ?20 ?15 ?10 ?5 0 1.0e+6 10.0e+6 100e+6 1.0e+9 10.0e+9 frequency (hz) s21 (db) 90 92 94 96 98 100 102 104 106 108 110 ?40 ?20 0 20 40 60 80 0 0.5 1.0 1.5 2.0 0 1.0 2.0 3.0 4.0 5.0 figure 4. insertion loss characteristic reverse voltage (v) normalized capacitance temperature ( c) resistance ( ) ?60 ?40 ?30 ?20 ?10 0 10.0e+6 100e+6 1.0e+9 10.0e+ 9 frequency (hz) s41 (db) figure 5. insertion loss characteristic figure 6. typical capacitance vs. reverse biased voltage (normalized capacitance cd at 2.5 v) figure 7. typical resistance over temperature ?45 ?50
NUF4001MU www. onsemi.com 4 theory of operation the NUF4001MU 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 8 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 8. 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. 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
NUF4001MU www. onsemi.com 5 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 9a. 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 9b. 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 9c. 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 9. 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
NUF4001MU www. onsemi.com 6 package dimensions udfn8, 1.8x1.2, 0.4p case 517ad issue d notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters. 3. dimension b applies to plated terminal and is measured between 0.15 and 0.30 mm from terminal. 4. coplanarity applies to the exposed pad as well as the terminals. a b e d d2 e2 bottom view b e 8x 0.10 b 0.05 a c c k 8x note 3 2x 0.10 c pin one reference top view 2x 0.10 c 8x a a1 (a3) 0.05 c 0.05 c c seating plane side view l 8x 1 8 dim min max millimeters a 0.45 0.55 a1 0.00 0.05 a3 0.13 ref b 0.15 0.25 d 1.80 bsc d2 0.90 1.10 e 1.20 bsc e2 0.20 0.30 e 0.40 bsc l 0.20 0.30 detail b 1.10 0.25 0.35 7x 0.35 1.50 0.40 pitch dimensions: millimeters 0.45 *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* 1 package outline j 0.19 ref l1 ??? 0.10 8x a1 a3 ?? 0.20 typ NUF4001MU/d bluetooth is a registered trademark of bluetooth sig. on semiconductor and are trademarks of semiconductor components industries, llc dba on semiconductor or its subsidiaries i n the united states and/or other countries. on semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property . a listing of on semiconductor?s product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent?marking.pdf . on semiconductor reserves the right to make changes without further notice to any products herein. on semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does o n semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. buyer is responsible for its products and applications using on semiconductor products, including compliance with all laws, reg ulations and safety requirements or standards, regardless of any support or applications information provided by on semiconductor. ?typical? parameters which may be provided in on semiconductor data sheets and/or specifications can and do vary in dif ferent applications and actual performance may vary over time. all operating parameters, including ?typic als? must be validated for each customer application by customer?s technical experts. on semiconductor does not convey any license under its patent rights nor the right s of others. on semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any fda class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. should buyer purchase or use on semicondu ctor products for any such unintended or unauthorized application, buyer shall indemnify and hold on semiconductor and its officers, employees, subsidiaries, affiliates, and distrib utors 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 unintended or unauthorized use, even if such claim alleges that on semiconductor was negligent regarding the design or manufacture of the part. on semiconductor is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. p ublication 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 literature fulfillment : literature distribution center for on semiconductor 19521 e. 32nd pkwy, aurora, colorado 80011 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 loc al sales representative ?
|
