2 www.johansondielectrics.com x2y ? technology overview x2y ? components share many common traits with conventional multi-layer ceramic capacitors (mlcc) to facilitate adoption by end-user s into their manufacturing processes same component sizes (0603, 0805, 1206, etc.) same pick and place equipment same voltage ratings same dielectric, electrode and termination materials same industry test standards for component reliability the x2y ? design - a capacitive circuit a standard bypass capacitor has opposing electrode layers stacked inside. an x2y ? adds another set of electrode layers to effectively surround each existing electrode within the stack of a two-terminal capacitor. the only external difference is two additional side terminatio ns, creating a four-terminal capacitive circuit, which allows circuit designers a multitude of attachment options. x2y ? for today?s circuits circuit designers today are challenged with maintaining signal and power integrity amid increasing electro-magnetic compliance (emc) requirements, while at the same time lowering system costs. x2y ? technology is an enabler to this end, providing a quantum leap in circuit performance. x2y ? replaces multiple standard passives and integrated passive components with a single device, freeing precious board space for ad ditional active components or design miniaturization. in short, x2y ? gives end-users the cost advantage they need to compete in today?s market. g1 a g2 b g1 g2 a b signal (pwr 1) return (pwr 2) signal (power) return (ground) g1 g2 a b x2y ? circuit 1: filtering when used in circuit 1 configuration the x2y ? filter capacitor is connected across two signal lines. differential mode noise is filtered to ground by the two y capacitors, a & b. common mode noise is cancelled within the device. x2y ? circuit 2: decoupling when used in circuit 2 configuration a & b capacitors are placed in parallel effectively doubling the apparent capacitance while maintaining an ultra-low inductance.
3 www.johansondielectrics.com emi filtering with x2y ? many experts agree that balance is the key to a ?quiet? circuit. x2y ? is a balanced circuit device with two equal halves, tightly matched in both phase and magnitude with respect to ground. this effectively eliminates the need for a common mode choke*. several advantages are gained by two balanced capacitors sharing a single ceramic component body. other x2y ? filter applications dc-dc converters, power i/o, connectors (rj45, d-sub), audio/voice/data, can, high-speed differential. effectively replaces common mode chokes, inductors, ferrites and feedthru capacitors. exceptional common mode rejection effects of aging & temperature are equal on both caps effect of voltage variation eliminated matched line-to-ground capacitance common mode choke replacement in this example, a 5 h common mode choke is replaced by an 0805, 1000pf x2y ? component acheiving superior emi filtering by a component a fraction of the size and cost. common mode choke 9.0 x 6.0 x 5.0 mm x2y ? 2.0 x 1.3 x 1.0 mm dc motor emi reduction: a superior solution one x2y ? component has successfully replaced 7 discrete filter components while achieving superior emi filtering. inamp input filter example 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 designer?s guide to instrumentation amplifiers (2nd edition)? by charles kitchin and lew counts signal line filter for usb & rj45 one x2y ? component can effectively filter high speed signal lines replacing replacing multiple inductive and ferrite components. signal lines filtered with x2y? signal lines filtered with lc filter chip no filter cmc 5uh x2y? 1000pf ambient
4 www.johansondielectrics.com mounted performance system performance 1:5 mlcc replacement example x2y?s ? proven technology enables end- users to use one x2y capacitor to replace five conventional mlccs in a typical high performance ic bypass design. vias are nearly cut in half, board space is reduced and savings are in dollars per pcb. decoupling with x2y ? the low inductance advantages of the x2y ? capacitor circuit enables high-performance bypass networks at reduced system cost. low esl (device only and mounted) broadband performance effective on pcb or package lower via count, improves routing reduces component count lowers placement cost 104 mlcs 0402 47nf 20 x2y ? 0603 100nf transfer impedance seen by fpga component performance the x2y ? has short, multiple and opposing current paths resulting in lower device inductance. mutual coupling from opposing polarity vias lowers inductance when mounted on a pcb.
5 www.johansondielectrics.com dimensional view x2y ? f ilter & d ecoupling c apacitors 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 dvantages superior noise suppression differential and common mode attenuation replace multiple components with one device matched capacitance line to ground, both lines low inductance due to cancellation effect a pplications fpga / asic decoupling -processor decoupling broadband emi filtering dc motor noise suppression cellular handsets cross-sectional view g g a b equivalent circuits g1 a g2 b cb w chip size dielectric voltage (wvdc) capacitance range johanson part number eia jdi circuit 1 order code circuit 2 0402 x07 x7r 6.3 5000pf - .012f 502 - 123 .010f - .024f 6r3x07w***mv4* 50 1500pf 152 3000pf 500x07w152mv4* 0603 x14 npo 50 1.0pf - 220pf 1r0 - 221 2.0pf - 440pf 500x14n***mv4* x7r 6.3 0.10f 104 0.20f 6r3x14w104mv4* 25 .018f - .022f 183 - 223 .036f - .044f 250x14w***mv4* 50 470pf - .012f 471 - 123 940pf - .024f 500x14w***mv4* 0805 x15 npo 50 10pf - 470pf 100 - 471 20pf - 940pf 500x15n***mv4* 100 10pf - 330pf 100 - 331 20pf - 660pf 101x15n***mv4* x7r 50 1000pf - .039f 102 - 393 2000pf - .078f 500x15w***mv4* 100 1000pf - .022f 102 - 223 2000pf - .044f 101x15w***mv4* 1206 x18 npo 50 1000pf 102 2000pf 500x18n102mv4* x7r 50 .022f - 0.10f 223 - 104 .044f - 0.20f 500x18w***mv4* 100 .022f - .047f 223 - 473 .044f - 0.20f 101x18w***mv4* 1210 x41 x7r 50 .047f - 0.27f 473 - 274 .094f - 0.54f 500x41w***mv4* 100 .047f - 0.15f 473 - 154 .094f - 0.30f 101x41w***mv4* 1410 x44 x7r 50 0.22f - 0.40f 224 - 404 0.44f - 0.80f 500x44w***mv4* 100 0.22f - 0.22f 224 - 224 0.44f - 0.44f 101x44w***mv4* 1812 x43 x7r 50 0.22f - 0.56f 224 - 564 0.44f - 1.12f 500x43w***mv4* 100 0.22f - 0.47f 224 - 474 0.44f - 0.94f 101x43w***mv4* circuit 1 (balanced filtering) = a (or b) to g circuit 2 (decoupling) = a + b to g [a to b capacitance = 1/2 c1] rated voltage is for a or b to ground. a to b rating is 2 x vrated contact the factory for other voltage ra tings and capacitance values. x2y ? technology patents and registered trademark under license from x2y attenuators, llc eb l t
6 www.johansondielectrics.com x2y ? f ilter & d ecoupling c apacitors h ow to o rder x2y ? emi f ilter c apacitors p/n written: 500x18w473mv4e voltage 6r3 = 6.3 v 250 = 25 v 500 = 50 v 101 = 100 v marking 4 = unmarked dielectric n = npo w = x7r capacitance 1st two digits are significant; third digit denotes number of zeros. 474 = 0.47 f 105 = 1.00 f tolerance m = 20% case size x07 = 0402 x14 = 0603 x15 = 0805 x18 = 1206 x41 = 1210 x43 = 1812 4 termination v = ni barrier w/ 100% sn plating v w x18 500 473 m tape modifier code tape reel e embossed 7? u embossed 13? t paper 7? r paper 13? tape specs. per eia rs481 e m echanical c haracteristics 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 1.143 0.076 0.064 0.005 1.626 0.127 0.080 0.008 2.032 0.203 0.124 0.010 3.150 0.254 0.125 0.010 3.175 0.254 0.140 0.010 3.556 0.254 0.174 0.010 4.420 0.254 w 0.024 0.003 0.610 0.076 0.035 0.004 0.889 0.102 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 0.009 0.004 0.229 0.102 0.009 0.004 0.229 0.102 0.009 0.004 0.229 0.102 0.009 0.005 0.229 0.127 0.009 0.005 0.229 0.127 0.009 0.005 0.229 0.127 cb 0.010 0.003 0.305 0.076 0.018 0.004 0.457 0.102 0.022 0.005 0.559 0.127 0.040 0.005 1.016 0.127 0.045 0.005 1.143 0.127 0.045 0.005 1.143 0.127 0.045 0.005 1.143 0.127
7 www.johansondielectrics.com s older p ad r ecommendations 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 x 0.020 0.51 0.03 0 0.76 0.050 1.27 0.065 1.65 0.100 2.54 0.100 2.54 0.125 3.18 y 0.020 0.51 0.025 0.64 0.035 0.89 0.040 1.02 0.040 1.02 0.040 1.02 0.040 1.02 g 0.024 0.61 0.040 1.02 0.050 1.27 0.080 2.03 0.080 2.03 0.100 2.54 0.130 3.30 v 0.015 0.38 0.020 0.51 0.022 0.56 0.040 1.02 0.045 1.14 0.045 1.14 0.045 1.14 u 0.039 0.99 0.060 1.52 0.080 2.03 0.120 3.05 0.160 4.06 0.160 4.06 0.190 4.83 z 0.064 1.63 0.090 2.29 0.120 3.05 0.160 4.06 0.160 4.57 0.180 4.57 0.210 5.33 v v v v v v z x u v g y z x u v g y x2y ? f ilter & d ecoupling c apacitors o ptimizing x2y p erformance with p roper a ttachment t echniques x2y ? capacitors excel in low inductance performance for a myriad of appli- cations including emi/rfi ? ltering, power supply bypass / decoupling. how the capacitor is attached to the application pcb is every bit as important as the capacitor itself. proper attention to pad layout and via placement insures superior device performance. poor pcb layouts squander performance, requir- ing more capacitors, and more vias to do the same job. figure 1 compares the x2y ? recommended layout against a poor layout. because of its long extents from device terminals to vias, and the wide via separation, the poor layout shown performs badly. it exhibits approximately 200% l1 inductance, and 150% l2 inductance compared to recommended x2y ? layouts. for further details on via placement and it?s effect on mounted inductance, please refer to x2y attenuators, llc. application note #3008 ?get the most from x2y capacitors with proper attachment techniques? at www.x2y.com good layout poor layout figure 1
15191 bledsoe st., sylmar, california 91342 tel (818) 364-9800 fax (818) 364-6100 http://www.johansondielectrics.com ? 2005 publication jd0512 printed in usa johanson technology, inc. camarillo, california www.johansontechnology.com lasertrim ? tuning capacitors 900 mhz - 6.0 ghz ceramic components high frequency capacitors & inductors single layer microwave capacitors johanson dielectrics, inc. sylmar, california www.johansondielectrics.com x2y? emi filter capacitors high voltage ceramic capacitors surface mount ceramic capacitors y1 & y2 safety certified capacitors advanced monolythic ceramics olean, new york www.amccaps.com radial leaded high voltage mlccs switchmode ceramic capacitors ceramic planar array filters high temperature radial leaded mlccs
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