EMDF101W334M1GV001E

EMI FILTER & DECOUPLING CAPACITORS ® EMI® 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. ADVANTAGES • • • • • APPLICATIONS One device for EMI suppression or decoupling Replace up to 7 components with one EMI Differential and common mode attenuation Matched capacitance line to ground, both lines Low inductance due to cancellation effect • • • • • Amplifier Filter & Decoupling High Speed Data Filtering EMC I/O Filtering FPGA / ASIC / µ-P Decoupling DDR Memory Decoupling 222 4400pF 2200pF 472 9400pF 4700pF .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 50 50 50 50 16 0603 (X14) 25 25 16 10 0805 (X15) 1206 (X18) X7R NP0 100 100 100 100 100 100 50 NP0 X7R 1210 (X41) X7R 1410 (X44) X7R 1812 (X43) X7R 10 100 100 100 100 100 100 100 50 X7R NP0 50 100 100 100 100 100 100 100 100 50 X7R 1.0µF 152 3000pF 1500pF 50 2.0µF 102 2000pF 1000pF .020µF .010µF 471 50 105 940pF 470pF 221 50 0.94µF 0.47µF 440pF 220pF 101 50 474 200pF 100pF 470 50 0.80µF 0.40µF 47pF 94pF 330 50 404 33pF 66pF 270 0402 (X07) 0.66µF 0.33µF 27pF 54pF 220 SIZE 334 22pF 44pF 100 50 Power Bypass (2 Y-Caps.) 0.44µF 0.22µF 10pF 20pF XRX NP0 EMI Filtering (1 Y-Cap.) 224 100 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 CB See page 81 for additional dielectric specifications. W Cross-sectional View Dimensional View CB G A EB T W B L G CASE SIZE EB 0402 (X07) IN MM 0603 (X14) IN MM 0805 (X15) IN MM 1206 (X18) L IN MM T 1210 (X41) IN MM 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 EMI FILTER & DECOUPLING CAPACITORS THE EMI DESIGN - A BALANCED, LOW ESL, “CAPACITOR CIRCUIT” The EMI 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 EMI 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. EMI 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 EMI. POWER BYPASS / DECOUPLING For Power Bypass applications, EMI’s 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 EMI 1nF input filter, a single EMI 100nF power bypass cap. EMI 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 EMI 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 EMI 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 EMI 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. EMI’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 EMI are plotted in BLUE and GREEN. (The total capacitance of EMI (Circuit 2) is twice the value, or 200nF and 98nF in this example.) The sigle EMI is clearly superior to the three paralleled MLCs. EMI HIGH PERFORMANCE POWER BYPASS - IMPROVE PERFORMANCE, REDUCE SPACE & VIAS Actual measured performance of two high performance SerDes FPGA designs demonstrate how a 13 component EMI bypass network significantly out performs a 38 component MLC network. www.johanson dielectrics.com 13