LASERtrim(R) SMT Tuner Capacitors Key Features * * * * * * RoHS Compliant Parts Available Automates Functional Tuning High Resolution, High Accuracy Tuning Capability Highly Stable and Reliable After Adjustment Small, Standard SMD Chip Sizes Lower Placement Cost vs Mechanical Applications * Portable Cellular Products * Wireless LAN * Cable Modems * RFID * Wireless Transceivers * Custom Applications LASERtrim(R) tuning capacitors are laser adjustable monolithic ceramic surface mount devices for precise functional tuning of RF circuits. LASERtrims(R) have the high reliability expected of conventional multi-layer chip capacitors and do not experience capacitance drift, flux entrapment and other reliability concerns associated with mechanical trimmers. Excellent post-trim Q and ESR performance are exhibited at frequencies of 100 - 2000 MHz. Offered in chip sizes 0603 to 1210 with nickel barrier terminations and tape and reel packaging, LASERtrims(R) are compatible with high volume SMT auto-placement and reflow techniques. These high quality, drift-free devices are ideally suited for functional tuning applications in oscillator, filter, and antenna circuits in a variety of wireless RF products. Model Selection RoHS P/N EIACase Size Capacitance Initial Tuning Range Quality Factor 200 MHz 900 MHz 500L14N6R0XG4 0603 6.0 pF 6.0 - 1.00 pF > 40 --- 500L14N100XG4 500L14N120XG4 500L15M6R0XG4 500L15N100XG4 500L15N200XG4 500L18S2R0XG4 500L18M3R0XG4 500L18M4R0XG4 500L18M6R5XG4 500L18N100XG4 500L41S2R5XG4 500L41S3R2XG4 500L41M7R0XG4 101L41M7R0XG4 500L41M120XG4 500L41N210XG4 0603 0603 0805 0805 0805 1206 1206 1206 1206 1206 1210 1210 1210 1210 1210 1210 10.0 pF 12.0 pF 6.0 pF 10.0 pF 20.0 pF 2.0 pF 3.0 pF 4.0 pF 6.5 pF 10.0 pF 2.5 pF 3.2 pF 7.0 pF 7.0 pF 12.0 pF 21.0 pF 10.0 - 2.00 pF 12.0 - 2.00 pF 6.0 - 1.00 pF 10.0 - 1.20 pF 20.0 - 1.50 pF 2.0 - 0.50 pF 3.0 - 1.0 pF 4.0 - 1.00 pF 6.5 - 1.20 pF 10.0 - 2.00 pF 2.5 - 0.50 pF 3.2 - 0.50 pF 7.0 - 1.50 pF 7.0 - 1.50 pF 12.0 - 2.00 pF 21.0 - 3.00 pF > 125 > 125 > 300 > 75 > 50 > 600 > 500 > 500 > 300 > 125 > 600 > 450 > 400 > 400 > 200 > 75 ----> 35 ----> 100 ----> 40 --> 125 > 125 ----> 25 --- Initial capacitance has a tolerance of + 25% - 0%. Trim ranges are approximate and vary with laser settings and trim pattern. Custom LASERtrims(R) with features and performance tailored for specific applications are available. 38 www.johansontechnology.com Tuning Description LASERtrim(R) tuning capacitors are used to provide functional RF circuitry tuning. The tuning is normally performed at a laser station integrated into the automated assembly line at a point beyond any operations that may significantly alter the circuit's RF characteristics. Tuning is performed by a computer controlled YAG laser beam which removes or "trims" the top electrode material of the LASERtrim(R) thereby decreasing it's capacitance. Circuit parameters such as frequency or voltage are monitored during tuning and fed back to the laser controller achieving extremely precise results. Typical capacitance change in relation to the amount of electrode removal is shown in the graphs below. STIMULUS POWER SUPPLY & SIGNAL GENERATOR VISION SYSTEM CIRCUIT (VCO, BAND PASS FILTER CONTROLLER LASER BEAM MEASUREMENT (SPECTRUM ANALYZER, FREQUENCY COUNTER, LASER STATION Sectional Diagram: Sizes L14 & L15 Sectional Diagram: Sizes L18 & L41 End Terminations End Terminations Surface Electrode Surface Electrode U.S. PATENT 5264983 Gold Plating Electrode Nickel Ceramic Gold Plating Nickel Ceramic Typical Series Resonant Frequency Trimming Effect on Capacitance 10 0% 10% 20% 30% 40% L15N100 L18L6R5 L18C2R0 L41N210 ESR (Ohms) Residual Capacitance Electrode 50% 60% 70% 80% L41 CAP 90% L18 CAP 100% 0% 10% 20% 30% 40% 50% 60% 70% Electrode Area Removed 80% 90% 100% 1 0 5 10 15 20 25 Frequency (MHz) www.johansontechnology.com 39 LASERtrim(R) Typical RF Characteristics TYPICAL QUALTIY FACTOR: L15N100 TYPICAL ESR: L15N100 10 1000 50% Trim, 5.76pF 25% Trim, 8.09pF 100% Trim, 2.19pF ESR (Ohms) 0% Trim, 12.36pF Q 100 10 500 1000 Frequency (MHz) 1500 2000 0 500 TYPICAL QUALTIY FACTOR: L18C2R0 1000 Frequency (MHz) 0% Trim, 2.10pF 50% Trim, 1.27pF 0% Trim, 2.10pF 50% Trim, 1.27pF 25% Trim, 1.55pF 100% Trim, 0.48pF 25% Trim, 1.55pF 100% Trim, 0.48pF ESR (Ohms) Q 100 2000 1 0.1 0 500 1000 Frequency (MHz) 1500 2000 0 500 TYPICAL QUALTIY FACTOR: L18L6R5 1000 Frequency (MHz) 1500 2000 TYPICAL ESR: L18L6R5 1000 10 0% (7.2 pF) 50% (4.1 pF) 0% (7.2 pF) 50% (4.1 pF) 25% (5.6 pF) 100% (1.2 pF) 25% (5.6 pF) 100% (1.2 pF) ESR (Ohms) 100 Q 10 1 0.1 0 500 1000 Frequency (MHz) 1500 2000 0 500 1000 Frequency (MHz) For L41 size electrical characteristics and graphs, please contact the factory. 40 1500 10 1000 1 100% Trim, 2.19pF TYPICAL ESR: L18C2R0 10000 10 50% Trim, 5.76pF 25% Trim, 8.09pF 1 0.1 0 0% Trim, 12.36pF www.johansontechnology.com 1500 2000 Mechanical Characteristics L14 (EIA 0603) SIZE L W T x&y E/B E/B* Inches .058 .008 .032 .008 .025 MAX .004 MIN .005 MAX .012 MAX L15 (EIA 0805) L18 (EIA 1206) (mm) Inches .080 .008 (2.00 .20) .050 .008 (1.27 .20) .025 .005 (0.64 .13) .004 MIN (0.10 MIN ) .005 MIN (0.13 MIN ) N/A (L14 Only) (mm) Inches .122 .008 (3.09 .20) .060 .008 (1.52 .20) .025 .005 (0.64 .13) .004 MIN (0.10 MIN ) .005 MIN (0.13 MIN ) N/A (L14 Only) (mm) (1.47 .20) (0.81 .20) (0.64 MAX) (0.10 MIN) (0.13 MAX) (0.30 MAX) Top View L41 (EIA 1210) (mm) Inches .130 .008 (3.30 .20) .100 .008 (2.54 .20) .025 .005 (0.64 .13) .004 MIN (0.10 MIN ) .005 MIN (0.13 MIN ) N/A (L14 Only) Side View Bottom View W T y x L E/B E/B* Electrical Characteristics Temperature Coefficient: Dissipation Factor: Insulation Resistance: Dielectric Strength: Test Parameters: ENVIRONMENTAL: 50 Volts DC 0 30ppm /C, -55 to 125C .001 (0.1%) max, 25C > 10 G @ 25C,WVDC; 125C IR is 10% of 25C rating. 2.5 X WVDC, 25C, 50 mA max 1MHz 50kHz, 1.00.2 VRMS, 25C Meets the mechanical & environmental characteristics as given for the JTI SSeries capacitors (see second page of S-Series specification sheet), except terminal adhesion for all sizes is > 2.0 lbs. Capacitance Change WORKING VOLTAGE: 1.0% 0.5% 0.0% -0.5% -1.0% -55 -30 -5 20 45 70 95 120 Temperature (C) How to Order 500 L41 VOLTAGE CASE SIZE See Chart Standard Voltage: 500 = 50 V DIELECTRIC L = NPO C = HI-Q NPO N, M = RoHS NPO S = RoHS Hi-Q NPO N 210 X PRE-TRIM CAPACITANCE TOLERANCE TERMINATION Initial capacitance tolerance is +25% -0% G = Gold flashed 1st two digits are significant; third digit denotes number of zeros, R = decimal point. 2R0 = 2.0 pF 210 = 21 pF G MARKING Part marking not available this series www.johansontechnology.com T 4 TAPE MODIFIER Tape Code T R Tape Type Paper Paper Reel Size 7" 13" Tape specs. per EIA RS481. 41