S-X15-EMI

X2Y Filter & Decoupling Capacitors ® 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. 152 3000pF 1500pF 222 4400pF 2200pF 472 9400pF 4700pF .020µF .010µF .030µF .015µF .044µF .022µF .078µF .039µF .094µF .047µF 0.20µF 0.10µF 0.36µF 0.18µF 103 153 223 393 473 104 184 50 50 16 25 25 16 10 100 100 100 100 100 50 50 1206 (X18 NPO X7R 1210 (X41) X7R 1410 (X44) X7R 1812 (X43) X7R 10 10 16 16 10 100 100 25 100 100 100 100 100 100 100 50 100 100 100 100 100 100 100 100 50 X7R NPO 10 10 X5R 0805 (X15) 16 50 100 100 100 100 100 100 100 100 50 X7R 1.0µF 102 2000pF 1000pF 50 2.0µF 940pF 470pF 471 50 105 440pF 220pF 221 50 0.94µF 0.47µF 200pF 100pF 101 50 X7R 474 47pF 94pF 470 50 0.80µF 0.40µF 33pF 66pF 330 50 404 27pF 54pF 270 50 0.68µF 0.33µF 22pF 44pF 220 50 334 10pF 20pF 100 50 0.44µF 0.22µF 100 pF; 1kHz ±50Hz; 1.0±0.2 VRMS C ≤ 100 pF; 1Mhz ±50kHz; 1.0±0.2 VRMS Test Conditions: Other: 1.0kHz±50Hz @ 1.0±0.2 Vrms See main catalog page 35 for additional dielectric specifications. Equivalent Circuits Cross-sectional View A G1 G2 W Dimensional View G CB A CB B EB T W L G B EB Case Size T 0402 (X07) IN mm 0603 (X14) IN mm 0805 (X15) IN mm 1206 (X18) IN mm 1210 (X41) IN mm L 1410 (X44) IN mm 1812 (X43) 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 0.025 ± 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 ± 0.102 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 www.johanson dielectrics.com 11 X2Y Filter & Decoupling Capacitors ® The X2Y® Design - A Balanced, Low ESL, “Capacitor Circuit” The X2Y® capacitor design starts with standard 2 terminal MLC capacitor’s 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, low inductance capacitors in a compact, four-terminal SMT chip. EMI Filtering: 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®. Power Bypass / Decoupling 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. GSM RFI Attenuation in Audio & Analog 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. Amplifier 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 µV < 0.1 µV 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 12 www.johanson dielectrics.com X2Y Filter & Decoupling Capacitors ® Common Mode Choke Replacement • 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. Measured Common Mode Rejection Parallel Capacitor Solution 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. X2Y’s very low mounted inductance allows designers to use a single, higher value part and completely avoid the antiresonance 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. X2Y High Performance Power Bypass - Improve Performance, Reduce Space & Vias 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_STXII.pdf www.johanson dielectrics.com 13