10 x 2 y ? f i lter & d ecou p l i ng c a p ac i tors x2y ? filter capacitors employ a unique, patented low inductance design featuring two balanced capacitors that are immune to temperature, voltage and aging performance differences. these components offer superior decoupling and emi filtering performance, virtually eliminate parasitics, and can replace multiple capacitors and inductors saving board space and reducing assembly costs. a d v antage s ? one device for emi suppression or decoupling ? replace up to 7 components with one x2y ? differential and common mode attenuation ? matched capacitance line to ground, both lines ? low inductance due to cancellation effect a pplication s ? amplifier filter & decoupling ? high speed data filtering ? emc i/o filtering ? fpga / asic / -p decoupling ? ddr memory decoupling x2y ? technology patents and registered trademark under license from x2y attenuators, llc emi filtering (1 y-cap.) <10pf 10pf 22pf 27pf 33pf 47pf 100pf 220pf 470pf 1000pf 1500pf 2200pf 4700pf .010f .015f .022f .039f .047f 0.10f 0.18f 0.22f 0.33f 0.40f 0.47f 1.0f power bypass (2 y-caps.) <20pf 20pf 44pf 54pf 66pf 94pf 200pf 440pf 940pf 2000pf 3000pf 4400pf 9400pf .020f .030f .044f .078f .094f 0.20f 0.36f 0.44f 0.68f 0.80f 0.94f 2.0f size cap. code xrx 100 220 270 330 470 101 221 471 102 152 222 472 103 153 223 393 473 104 184 224 334 404 474 105 0402 (x07) npo 50 50 50 50 50 50 50 x7r 50 50 50 50 50 50 16 0603 (x14) npo 100 100 100 100 100 50 50 50 x7r 100 100 100 100 100 100 100 100 50 25 25 16 10 10 x5r 16 10 10 10 0805 (x15) npo 100 100 100 100 100 100 100 50 x7r 100 100 100 100 100 100 100 100 50 50 50 25 10 1206 (x18 npo voltage ratings 6.3 = 6.3 vdc 10 = 10 vdc 16 = 16 vdc 25 = 25 vdc 50 = 50 vdc 100 = 100 vdc 500 = 500 vdc 100 x7r 100 100 100 100 100 16 16 10 1210 (x41) x7r 500 100 100 100 25 16 1410 (x44) x7r 500 100 1812 (x43) x7r 500 100 contact factory for part combinations not shown. filtering capacitance is specified as line-to-ground ( terminal a or b to g) power bypass capacitance is specified power-to-ground (a + b to g) rated voltage is from line to ground in circuit 1, power to ground in circuit 2 . h ow to o rder x2 y ? c apacitor s p/n written: 101x14w102mv4t 100 x14 w 102 m v 4 t voltage size dielectric capacitance tolerance termination marking packing 6r3 = 6.3 v 100 = 10 v 160 = 16 v 250 = 25 v 500 = 50 v 101 = 100 v 501 = 500 v x07=0402 x14=0603 x15=0805 x18=1206 x41=1210 x44=1410 x43=1812 n = npo w = x7r x = x5r 1st two digits are signifi - cant; third digit denotes number of zeros, r = decimal. 102 = 1000 pf 104 = 0.10 f 5r6 = 5.6pf m = 20% * d = 0.50 pf *values < 10 pf only v = ni barrier with 100% tin plating (matte) f = polyterm flexible termination t = snpb 4 = unmarked (not available) e =embossed 7 t =punched 7 no code = bulk tape specs. per eia rs481 www.johanso n dielectrics.com
11 dimensional view cross-sectional view g g a b equivalent circuits g1 a g2 b eb cb l w t eb cb l w t x 2 y ? f i lter & d ecou p l i ng c a p ac i tors c a s e s ize 0402 (x07) 0603 (x14) 0805 (x15) 1206 (x18) 1210 (x41) 1410 (x44) 1812 (x43) in mm in mm in mm in mm in mm in mm in mm l 0.045 0.003 1.14 3 0.076 0.064 0.005 1.626 0.127 0.080 0.008 2.032 0.203 0.124 0.010 3.15 0 0.254 0.125 0.010 3.175 0.254 0.14 0 0.010 3.556 0.254 0.174 0.010 4.420 0.254 w 0.025 0.003 0.635 0.076 0.035 0.005 0.889 0.127 0.050 0.008 1.270 0.203 0.063 0.010 1.600 0.254 0.098 0.010 2.489 0.254 0.098 0.010 2.490 0.254 0.125 0.010 3.175 0.254 t 0.020 max 0.508 max 0.026 max 0.660 max 0.040 max 1.016 max 0.050 max 1.270 max 0.070 max 1.778 max 0.070 max 1.778 max 0.090 max 2.286 max eb 0.008 0.003 0.203 0.076 0.010 0.006 0.254 0.152 0.012 0.008 0.305 0.203 0.016 0.010 0.406 0.254 0.018 0.010 0.457 0.254 0.018 0.010 0.457 0.254 0.022 0.012 0.559 0.305 cb 0.012 0.003 0.305 0.076 0.018 0.004 0.457 0.10 2 0.022 0.005 0.559 0.127 0.040 0.005 1.016 0.127 0.045 0.005 1.14 3 0.127 0.045 0.005 1.14 3 0.127 0.045 0.005 1.14 3 0.127 e ectrica c h aracteri s tic s npo x7r x5r t emperature coefficient : 030ppm/c (-55 to +125c) 15% (-55 to +125c) 15% (-55 to +85c) dielectric strength: vrated 100vdc: dwv = 2.5 x wvdc, 25c, 50ma max. vrated = 500vdc: dwv = 1.5 x wvdc, 25c, 50ma max. d issipation f actor: 0.1% max. wvdc 50 vdc: 2.5% max. wvdc = 25 vdc: 3.5% max. wvdc = 10-16 vdc: 5.0% max. wvdc = 6.3 vdc: 10% max. wvdc 50 vdc: 5% max. wvdc 25 vdc: 10% max. insu lation r esistance (min. @ 25c, wvdc) c 0.047f: 1000 ?f or 100 g?, whichever is less c> 0.047f: 500 ?f or 10 g?, whichever is less test conditions: c > 100 pf; 1khz 50hz; 1.00.2 vrms c 100 pf; 1mhz 50khz; 1.00.2 vrms 1.0khz50hz @ 1.00.2 vrms other: see main catalog page 35 for additional dielectric specifications. emi filtering s21 signal-to-ground power bypass s21 power-to-ground 10.0 1.00 0.10 0.01 approximate impedance () 10.0 1.00 0.10 0.01 approximate impedance () labeled capacitance values below follow the p/n order code (single y cap value) effective capacitance measured in circuit 2 is 2x of the labled single y cap value. www.johanso n dielectrics.com
12 t h e x2 y ? d e s ign - a b alanced , l ow e s l , c apacitor c ircuit the x2y ? capacitor design starts with standard 2 terminal mlc capacitors opposing electrode sets, a & b, and adds a third electrode set (g) which surround each a & b electrode. the result is a highly vesatile three node capacitive circuit containing two tightly matched, lo w inductance capacitors in a compact, four-terminal smt chip. a mpli f ier i nput f ilter e x ample in this example, a single johanson x2y ? component was used to filter noise at the input of a dc instrumentation amplifier. this reduced component count by 3-to-1 and costs by over 70% vs. conventional filter components that included 1% film y-capacitors. parameter x2y ? 10nf discrete 10nf, 2 @ 220 pf comments dc offset shift < 0.1 v < 0.1 v referred to input common mode rejection 91 db 92 db source: analog devices, a designers guide to instrumentation amplifiers (2nd edition) by charles kitchin and lew counts emi f iltering : the x2y ? component contains two shunt or line-to-ground y capacitors. ultra-low esl (equivalent series inductance) and tightly matched inductance of these capacitors provides unequaled high frequency common-mode noise filtering with low noise mode conversion. x2y ? components reduce emi emissions far better than unbalanced discrete shunt capacitors or series inductive filters. differential signal loss is determined by the cut off frequency of the single line-to-ground (y) capacitor value of an x2y ? . x 2 y ? f i lter & d ecou p l i ng c a p ac i tors p ower b ypa ss / d ecoupling for power bypass applications, x2ys ? two y capacitors are connected in parallel. this doubles the total capacitance and reduces their mounted inductance by 80% or 1/5th the mounted inductance of similar sized mlc capacitors enabling high-performance bypass networks with far fewer components and vias. low esl delivers improved high frequency performance into the ghz range. g s m r f i a ttenuation in a udio & a nalog gsm handsets transmit in the 850 and 1850 mhz bands using a tdma pulse rate of 217hz. these signals cause the gsm buzz heard in a wide range of audio products from headphones to concert hall pa systems or silent signal errors created in medical, industrial process control, and security applications. testing was conducted where an 840mhz gsm handset signal was delivered to the inputs of three different amplifier test circuit configurations shown below whose outputs were measured on a hf spectrum analyzer. 1) no input filter, 2 discrete mlc 100nf power bypass caps. 2) 2 discrete mlc 1nf input filter, 2 discrete mlc 100nf power bypass caps. 3) a single x2y 1nf input filter, a single x2y 100nf power bypass cap. x2y configuration provided a nearly flat response above the ambient and up to 10 db imrpoved rejection than the conventional mlcc configuration. www.johanso n dielectrics.com
13 x2 y h ig h p er f ormance p ower b ypa ss - i mpro v e p er f ormance , r educe s pace & v ia s actual measured performance of two high performance serdes fpga designs demonstrate how a 13 component x2y bypass network significantly out performs a 38 component mlc network. for more information see http://johansondielectrics.com/pdfs/jdi_x2y_stx ii.pdf c ommon m ode c h oke r eplacement ? superior high frequency emissions reduction ? smaller sizes, lighter weight ? no current limitation ? vibration resistant ? no saturation concerns see our website for a detailed application note with component test comparisons and circuit emissions measurements. x 2 y ? f i lter & d ecou p l i ng c a p ac i tors p arallel c apacitor s olution a common design practice is to parallel decade capacitance values to extend the high frequency performance of the filter network. this causes an unintended and often over-looked effect of anti-resonant peaks in the filter networks combined impedance. x2ys very low mounted inductance allows designers to use a single, higher value part and completely avoid the anti- resonance problem. the impedance graph on right shows the combined mounted impedance of a 1nf, 10nf & 100nf 0402 mlc in parrallel in red. the mlc networks anti-resonance peaks are nearly 10 times the desired impedance. a 100nf and 47nf x2y are plotted in blue and green. (the total capacitance of x2y (circuit 2) is twice the value, or 200nf and 98nf in this example.) the sigle x2y is clearly superior to the three paralleled mlcs. measured common mode rejection www.johanso n dielectrics.com
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