38
www.johansontechnology.comwww.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.
mo d e l se l e C T i o n
lasert r i M
®
sMt tu n e r Ca p a C i t o r s
Ke y Fe 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
ap p l i C a T i o n S
• Portable Cellular Products • Wireless LAN
• Cable Modems • RFID
• Wireless Transceivers • Custom Applications
CAPACITANCE QUALITY FACTOR
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.comwww.johansontechnology.com
VISION SYSTEM
CONTROLLER
LASER BEAM
STIMULUS
POWER SUPPLY &
SIGNAL GENERATOR
CIRCUIT
(VCO, BAND PASS FILTER
MEASUREMENT
(SPECTRUM ANALYZER,
FREQUENCY COUNTER,
LASER ST 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 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® 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.
Surface Electrode
End Te rminations
Gold Plating NickelElectrode Ceramic
U.S. PATENT 5264983
Surface Electrode
End Te rminations
Gold Plating NickelElectrode Ceramic
Sectional Diagram: Sizes L14 & L15 Sectional Diagram: Sizes L18 & L41
Tu n i n g DeSC RipTion
Typical Series Resonant Frequency
1
10
0510 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.comwww.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: L18C2R0TYPICAL ESR: L18C2R0
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: L18L6R5
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: L18L6R5
laserT r i m ® Ty p i C a l RF CH 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.comwww.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
el e C T r i C a l CH a r a C T e r i s T i C s
WORKING VOLTAGE:
50 Volts DC
TEMPERATURE COEFFICIENT:
0 ± 30ppm /°C, -55 to 125°C
DISSIPATION FACTOR:
.001 (0.1%) max, 25°C
INSULATION RESISTANCE:
> 10 GΩ @ 25°C,WVDC;
125°C IR is 10% of 25°C rating.
DIELECTRIC STRENGTH:
2.5 X WVDC, 25°C, 50 mA max
TEST PARAMETERS:
1MHz ±50kHz, 1.0±0.2 VRMS, 25°C
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)
me C H a n i C a l CH a r a C T e r i s T i C s
Ho w T o or 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
