38 www.johansontechnology.com www.johansontechnology.com lasertrim ? tuning capacitors are laser adjustable monolithic ceramic surface mount devices for precise functional tuning of rf circuits. lasertrims ? 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 ? 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. initial capacitance has a tolerance of + 25% - 0%. trim ranges are approximate and vary with laser settings and trim pattern. custom lasertrims? with features and performance tailored for specific applications are available. m o d e l s e l e c t i o n laser t r i m ? smt t u n e r c a p a c i t o r s k e y f e a t u r e s ? 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 a p p l i c a t i o n s ? portable cellular products ? wireless lan ? cable modems ? rfid ? wireless transceivers ? custom applications c apacitance quality f actor rohs p/n eiacase size initial tuning range 200 mhz 900 mhz 500l14n6r0xg4 0603 6.0 pf 6.0 - 1.00 pf > 40 --- 500l14n100xg4 0603 10.0 pf 10.0 - 2.00 pf > 125 --- 500l14n120xg4 0603 12.0 pf 12.0 - 2.00 pf > 125 --- 500l15m6r0xg4 0805 6.0 pf 6.0 - 1.00 pf > 300 > 35 500l15n100xg4 0805 10.0 pf 10.0 - 1.20 pf > 75 --- 500l15n200xg4 0805 20.0 pf 20.0 - 1.50 pf > 50 --- 500l18s2r0xg4 1206 2.0 pf 2.0 - 0.50 pf > 600 > 100 500l18m3r0xg4 1206 3.0 pf 3.0 - 1.0 pf > 500 --- 500l18m4r0xg4 1206 4.0 pf 4.0 - 1.00 pf > 500 --- 500l18m6r5xg4 1206 6.5 pf 6.5 - 1.20 pf > 300 > 40 500l18n100xg4 1206 10.0 pf 10.0 - 2.00 pf > 125 --- 500l41s2r5xg4 1210 2.5 pf 2.5 - 0.50 pf > 600 > 125 500l41s3r2xg4 1210 3.2 pf 3.2 - 0.50 pf > 450 > 125 500l41m7r0xg4 1210 7.0 pf 7.0 - 1.50 pf > 400 --- 101l41m7r0xg4 1210 7.0 pf 7.0 - 1.50 pf > 400 --- 500l41m120xg4 1210 12.0 pf 12.0 - 2.00 pf > 200 > 25 500l41n210xg4 1210 21.0 pf 21.0 - 3.00 pf > 75 ---
39 www.johansontechnology.com www.johansontechnology.com vision system contr oller laser beam stimulus po wer suppl y & signal genera to r circuit (vco , band p ass fil ter measurement (spectr um anal yzer, frequency counter, laser s t a tion lasertrim ? 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 circuits rf characteristics. tuning is performed by a computer controlled yag laser beam which removes or trims the top electrode material of the lasertrim ? thereby decreasing its 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. surf ace electrode end te r minations gold plating nic ke l electrode cer amic u. s. pa tent 5264983 surf ace electrode end te r minations gold plating nic ke l electrode cer amic sectional diagram: sizes l14 & l15 sectional diagram: sizes l18 & l41 t u n i n g d e scr ip t ion typical series resonant frequenc y 1 10 05 10 15 20 25 esr (ohms) frequency (mhz) l15n100 l18c2r0 l18l6r5 l41n210 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% residual capacitance electrode area removed l41 cap l18 cap trimming effect on capacitance
40 www.johansontechnology.com www.johansontechnology.com 10 100 1000 10000 0 500 1000 1500 2000 q frequency (mhz) 0% trim, 2.10pf 25% trim, 1.55pf 50% trim, 1.27pf 100% trim, 0.48pf typical qualtiy factor: l18c2r 0 t ypical esr: l18c2r 0 0.1 1 10 0 500 1000 1500 2000 esr (ohms) frequency (mhz) 0% trim, 2.10pf 25% trim, 1.55pf 50% trim, 1.27pf 100% trim, 0.48pf typical esr: l15n100 0.1 1 10 0 500 1000 1500 2000 esr (ohms) frequency (mhz) 0% trim, 12.36pf 25% trim, 8.09pf 50% trim, 5.76pf 100% trim, 2.19pf 10 100 1000 0 500 1000 1500 2000 q frequency (mhz) 0% trim, 12.36pf 25% trim, 8.09pf 50% trim, 5.76pf 100% trim, 2.19pf typical qualtiy factor: l15n100 typical esr: l18l6r 5 0.1 1 10 0 500 1000 1500 2000 esr (ohms) frequency (mhz) 0% (7.2 pf) 25% (5.6 pf) 50% (4.1 pf) 100% (1.2 pf) 1 10 100 1000 0 500 1000 1500 2000 q frequency (mhz) 0% (7.2 pf) 25% (5.6 pf) 50% (4.1 pf) 100% (1.2 pf) typical qualtiy factor: l18l6r 5 laser t r i m ? t y p i c a l rf c h a r a c t e r i s t i c s for l41 size electrical characteristics and graphs, please contact the factory.
41 www.johansontechnology.com www.johansontechnology.com l e/b t w e/b* x y 4 500 voltage standard voltage: 500 = 50 v marking part marking not available this series dielectric l = npo c = hi-q npo n, m = rohs npo s = rohs hi-q npo 210 pre-trim capacitance 1st two digits are significant; third digit denotes number of zeros, r = decimal point 2r0 = 2 0 pf 210 = 21 pf g termination g = gold flashed x tolerance initial capacitance tolerance is +25% -0% l41 case size see chart e l e c t r i c a l c h a r a c t e r i s t i c s working voltage: 50 volts dc t emperature coefficient : 0 30ppm /c, -55 to 125c d issipation f actor: .001 (0.1%) max, 25c i nsulation r esistance: > 10 g @ 25c,wvdc; 125c ir is 10% of 25c rating. dielectric strength: 2.5 x wvdc, 25c, 50 ma max test p arameters: 1mhz 50khz, 1.00.2 vrms, 25c environmental: meets the mechanical & environmental characteristics as given for the jti s- series capacitors (see second page of s-series specification sheet), except terminal adhesion for all sizes is > 2.0 lbs. -1.0% -0.5% 0.0% 0.5% 1.0% -55 -30 -5 20 45 70 95 120 capacitance change temperature (c) m e c h a n i c a l c h a r a c t e r i s t i c s h o w t o o r d e r l14 (eia 0603) inches (mm) 058 008 (1 47 20) 032 008 (0 81 20) 025 max (0 64 max) 004 min (0 10 min) 005 max (0 13 max) 012 max (0.30 max) l15 (eia 0805) inches (mm) 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) l18 (eia 1206) inches (mm) 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) l41 (eia 1210) inches (mm) 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) size l w t x & y e/b e/b* top view side view bottom view n tape modifier tape tape reel code type size t paper 7 r paper 13 tape specs per eia rs481 t
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