TEMEX
RF & MICROWAVE CAPACITORS
Multilayer ceramic “Porcelain” - Lasertrim®
LASER TRIM
®
CERAMIC CHIP CAPACITORS
Applications
Laser-Trim®‚ tuning capacitors are laser adjustable
monolithic ceramic surface mount devices for precise
functional tuning of R.F circuits.
.
Laser-Trim® have the high reliability expected of conven-
tional multi-layer chip capacitors and do not experience
capacitance drift, flux entrapment and other reliability
concerns associated with conventional trimmers.
These capacitors exhibit excellent post-trim “Q” and
“ESR” performances at frequencies of 100 - 2000 MHz.
Proposed in standard sizes 0603, 0805, 1206 and 1210
with nickel-barrier terminations and tape and reel pack-
aging, Laser-Trim® are compatible with high volume
S.M.T auto-placement and reflow techniques.
They are ideally suited for functional tuning applications
in oscillator, filter and antenna circuits in a variety of products mostly dealing with wireless
R.F such as:
•
•
•
•
•
•
•
Pagers
Transceivers
Remote control
Cellular communications
R.F Modems
Digital RF products
etc.
TEMEX reserves the right to modify herein specifications and information at any time when necessary to provide optimum performance and cost.
Major advantages
•
•
•
•
•
•
•
Ease of functional tuning process automation
High resolution, high accuracy tuning capability
High stability and reliability after adjustment
Reduced component placement & tuning cost
Standard & small component size
Non-interactive tuning process, no trim tool to affect the performance of the R.F circuits
Capability to trim inside electro-magnetic shields through very small access holes.
Electrical characteristics
Temperature coefficient
Quality factor
Insulation resistance
Rated voltage
Voltage proof
Test parameters
:
:
:
:
:
:
0 ± 30 ppm (achieved with 3 dielectric constant: C, L, N.)
See enclosed curves
100 seconds or 10 GΩ @ 50 V, 25° C
50 V dc
2.5 x Ur (50 mA max. -5 ± 1 sec)
1 MHz (± 5 %) -1 ± 0.2 Vrms
Laser-Trim® is a trade-mark Johanson Dielectrics Inc.
170
TEMEX
RF & MICROWAVE CAPACITORS
Multilayer ceramic “Porcelain” - Lasertrim®
LASER-TRIM‚ capacitors: 0603 & 0805 RANGE
Taping orientation
L
Top
electrode
W1
W
Termination
L3
L1
L and W: capacitor length and width
L1 and W1: top electrode length and width
L2
L2: safe trimmable top electrode length (active length).
TEMEX reserves the right to modify herein specifications and information at any time when necessary to provide optimum performance and cost.
SIZE
0603
0805
L mm
1.6 ± 0.3
2.0 ± 0.2
W mm
0.80 - 0.90
1.35 - 1.42
L1 mm
0.9/0.95
1.3/1.35
W1 mm
0.4/0.45
0.85/0.9
L2 mm
0.6
1.1
C max (pF)
1.0 to 10 pF
7 to 20 pF
L3 : unactive length.
(L3 is the distance between the termination and the laser-trimmed surface; L3 is the safe margin that
must remain untrimmed:
0.1 mm)
Other orientation: Please consult your local sales office.
171
TEMEX
RF & MICROWAVE CAPACITORS
Multilayer ceramic “Porcelain” - Lasertrim®
LASER-TRIM® RANGE 1206 & 1210 sizes
Part number
500L18C2R0XG
500L18L4R0XG
500L18L6R5XG
500L41C2R5XG
500L41C4R5XG
500L41L120XG
500L41N210XG
Size
1206
1206
1206
1210
1210
1210
1210
Pre-trim
minimum
capacitance
2.0 pF
4.0 pF
6.5 pF
2.5 pF
4.5 pF
12 pF
21 pF
Tuning
range
2.0 - 0.5 pF
4.0 - 0.8 pF
6.5 - 1.2 pF
2.5 - 0.5 pF
4.5 - 1.0 pF
12.0 - 2.5 pF
21.0 - 3.0 pF
Pre-trim”Q”
@
200 MHz
(minimum)
600
350
300
600
400
200
90
Pre-trim”Q”
@
900 MHz
(minimum)
100
50
40
125
75
25
....
Notes: 1 - The temperature coefficient is 0 ± 30 ppm for all types.
2 - Pre-trim minimum capacitance has a standard tolerance of: + 25 % / - 0 %.
Dimensions
Size
Length
1206 (L18)
mm
3.09
± 0.2
1.52
± 0.2
0.63
± 0.13
0.13 min.
0.10 min.
1206 (L18)
inch
0.122
± 0.008
0.060
± 0.008
0.025
± 0.005
0.005 min.
0.004 min.
1210 (L41)
mm
3.30
± 0.2
2.54
± 0.2
0.63
± 0.13
0.13 min.
0.10 min.
1210 (L41)
inch
0.130
± 0.008
0.100
± 0.008
0.025
± 0.005
0.005 min.
0.004 min.
TEMEX reserves the right to modify herein specifications and information at any time when necessary to provide optimum performance and cost.
Width
Thickness
Endband
Space
“x”&”y”
LASER-TRIM® Adjustable Ceramic chip capacitor
LENGTH
ENDBAND
WIDTH
x
y
x
THICKNESS
172
TEMEX
RF & MICROWAVE CAPACITORS
Multilayer ceramic “Porcelain” - Lasertrim®
Typical RF characteristics
Q vs. Frequency for L41C2R5
600
500
Q quality factor
400
300
200
100
0
0
500
1000
1500
2000
Frequency (MHz)
0% (3.0 pF)
25% (2.6 pF)
50% (1.8 pF)
75% (1.10 pF)
100% (0.5 pF)
ESR vs. Frequency for L41C2R5
2.0
100% (0.5 pF)
75% (1.0 pF)
1.5
ESR (Ω)
1.0
50% (1.8 pF)
25% (2.6 pF)
0% (3.0 pF)
0.5
0.0
0
500
1000
1500
Frequency (MHz)
2000
Data obtained using a Boonton 34A Laser parameters: Speed = 50 mm/sec. Q rate = 2.5 KHz, Scan increment = 12.5 µm ; Power = 2.2 watts.
Q vs. Frequency for L18L6R5
200
0% (7.2 pF)
25% (5.6 pF)
75% (2.2 pF)
100% (1.2 pF)
50% (4.1 pF)
ESR vs. Frequency for L18L6R5
4.0
Q (Quality factor)
150
100
3.0
ESR (Ω)
2.0
0% (7.2 pF)
25% (5.6 pF)
50% (4.1 pF)
75% (2.2 pF)
100% (1.2 pF)
50
1.0
TEMEX reserves the right to modify herein specifications and information at any time when necessary to provide optimum performance and cost.
0
0
500
1000
1500
Frequency (MHz)
2000
0.0
0
500
1000
1500
Frequency (MHz)
2000
Data obtained using a Boonton 34A Laser parameters: Speed = 50 mm/sec. Q rate = 2.5 KHz, Scan increment = 12.5 µm ; Power = 2.2 watts.
Q vs. Frequency for L41N210
300
250
ESR vs. Frequency for L41N210
1.5
0% (23 pF)
25% (16.8 pF)
Q (Quality factor)
ESR (Ω)
200
150
100
50
0
0
200
400
600
0% (7.2 pF)
25% (5.6 pF)
50% (4.1 pF)
75% (2.2 pF)
100% (1.2 pF)
50% (12.4 pF)
1.0
75% (6.8 pF)
100% (2.6 pF)
0.5
0.0
800
1000
0
200
Frequency (MHz)
600
400
Frequency (MHz)
800
1000
Data obtained using a Boonton 34A Laser parameters: Speed = 50 mm/sec. Q rate = 2.5 KHz, Scan increment = 12.5 µm ; Power = 2.2 watts.
173
TEMEX
RF & MICROWAVE CAPACITORS
Multilayer ceramic “Porcelain” - Lasertrim®
How to order?
500
L41
N
210
X
G
*
Standard
voltage:
500 = 50V
Case
size:
L41 = 1210
L18 = 1206
L15 = 0805
L14 = 0603
Pre-trim capacitance:
1st two digits are significant
third digit denotes number
of zeros; R is decimal point
ex: 2R0 = 2.0 pF
210 = 21 pF
C, L or N
L14: 1R0 to 1R5 = C
3R0 to 100 = N
L15: 1R5 to 5R0 = C
7R0 to 200 = N
L18 & L41: as per table for
standard items.
Initial capaci-
tance
tol-
erance is:
+25 % -0 %
Termination
(Gold over
nickel barrier)
Tape
code
E
U
T
R
Tape
type
embossed
embossed
paper
paper
Reel
size
7”
13”
7”
13”
174
TEMEX reserves the right to modify herein specifications and information at any time when necessary to provide optimum performance and cost.
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