TRIMMER CAPACITORS
Gigahertz trimmers
GIGAHERTZ TRIMMER CAPACITORS
Description
•
Gigahertz trimmers
are tiny trimmer capacitors which provide a straight-forward technique for fine
tuning RF and microwave circuits by eliminating time consuming methods of abrasive trimming, cut
and try adjustment techniques, and inter-change of fixed capacitors.
• The design involved the need from a virtually indestructible miniature trimmer with superior electrical
characteristics.
• Gigahertz trimmers whistand the rigors of soldering heat, excessive tuning and rough handling. As a
result of the excellent dielectric and insulation properties of the sapphire housing, high breakdown
voltage is achieved. Incorporating the self-locking constant torque drive mechanism which eliminates
the need for external bushing slots, the new Gigahertz trimmers offer many improvements: a fixed
length, increased Q, essentially zero tuning noise and reduced susceptibility to solder flux intrusion
during installation.
• A variety of mounting styles is available for vertical, printed circuit, panel, cavity and strip-line
applications.
• Gigahertz trimmers can be delivered with permanent sealing cap which resists intrusion of solder flux
and cleaning agents and allows easy access to the tuning rotor.
Features
•
•
•
•
•
Very high Q
Excellent tuning stability and low dynamic noise
Two temperature coefficients available
Working voltage 500 VDC, test 1000 VDC
High ratio capacitance / volume
•
•
•
•
•
Removable or permanent sealing caps
Meets MIL-C-14 409
Meets ESA/SCC 3010
French military QPL
Non-magnetic version
Applications
•
•
•
•
•
•
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Impedance matching
Crystal and resonator trimming
Interstage coupling
Gap trimming in microstrip
Filter tuning
Cavity tweaking
Amplifier adjustment
SALES OFFICES
AMERICA: +1 (602) 780 1995
BELGIUM: +32 (0) 2 7159020
FRANCE: +33 (0) 01 49884900
/
WEB SITE: http://www.tekelec-temex.com
10-15
ASIA PACIFIC: +852 2813 9826
GERMANY: +49 (0) 895164-0
ITALY: +39 (0) 2 58 01 91 06
/
EUROPE: +33 (0) 1 49884900
/
AFRICA: +33 (0) 1 49884900
NL: +31 (0) 793461430
UK: +44 (0) 1256 883340
NORDIC: +46 (0) 8 590 303 00
SPAIN: +34 (0) 1 3204160
TRIMMER CAPACITORS
Gigahertz trimmers
Characteristics
Range
∆
Cvs
Rotation
See table
See curve
See curve
Torque
AT(X) 7260
All others
Rotational life
Insulation
resistance
Contact
resistance
Self resonant
frequency
Vibration
Measured at 75%
Max. capacitance
Shock
1 cN.cm
≥
1 g.cm
7 to 70 cN.cm Average 30 cN.cm
14 to 130 cN.cm Average 60 cN.cm
Meets
> 800 revolutions
MIL-C-14490D
>10
4
MΩ
@ 500 VDC
< 0.01
Ω
To > 12 GHz
See curve
60 g 10 - 2000 Hz
100 g 6 ms
Measured at
25° C and 50% RH
Low dynamic
noise
Operates B to
C band
MIL-STD-202 E
Method 204 C
MIL-STD-202 E
Method 213 B
Linear over
wide range
Rated 500 VDC Typical breakdown
Voltage
@ sea level
Test 1000 VDC
> 1500 VDC
> 5000
Measured at
Min. Q @ 250 MHz
See table
max. capacitance
Operating
Stable over
-55° C to +125° C
temperature
full range
Thermal shock
Temperature
coefficient
-55° C to +125° C
See table
Technical data
Series
Q factor Capacitance
Temp. coef.
Lead (see syles
at
range
Standard option
drawings)
250 MHz
(pF)
(x) = 3
(x) = 2
AT(x) 726 serie > 5000
0.3 - 1.2 350 ± 75 0 ± 50
AT(x) 727 serie > 3000
0.6 - 4.5 350 ± 75 0 ± 50
AT(x) 728 serie > 4000
0.4 - 2.5 350 ± 75 0 ± 50
AT(x) 729 serie > 3000*
0.8 - 8.0 350 ± 75 0 ± 75
* 100 MHz
How to order
Dimensions (mm)
A
B
C
D
E
F
G
H
± 0.3 ± 0.1 ± 0.1 ± 0.1 ± 0.1 ± 0.2 ± 0.1 ± 0.1
5.8
8.0
5.8
12.3
1.9
3.0
3.0
3.0
2.0
3.2
2.0
6.4
2.0
4.0
2.3
6.4
1.9
2.8
2.8
2.8
3.0
4.2
4.2
4.2
4.0
2.5
3.6
3.1
5.7
5.9
5.9
5.9
Ex: AT37275
AT
3
Temp.
coef.
350 ± 75
727
Serie
0.6 to 4.5 p
5
Model
Model 5
For strip line mounting (Model 1 only), add SL to reference No
ex.: AT37271 SL
For Gigahertz including permanent sealing cap, add S to the reference number ex. : AT27273 S
Self-resonant frequency
∆Cj
versus rotation
Frequency (GHz)
SALES OFFICES
Rotation (Nb of turn)
WEB SITE: http://www.tekelec-temex.com
10-16
AMERICA: +1 (602) 780 1995
BELGIUM: +32 (0) 2 715 90 20
FRANCE: +33 (0) 01 49 88 49 00
/
ASIA PACIFIC: +852 2813 9826
GERMANY: +49 (0) 89 51 64-0
ITALY: +39 (0) 2 58 01 91 06
/
EUROPE: +33 (0) 1 49 88 49 00
/
AFRICA: +33 (0) 1 49 88 49 00
NL: +31 (0) 79 3461430
UK: +44 (0) 1256 883340
NORDIC: +46 (0) 8 590 303 00
SPAIN: +34 (0) 1 320 41 60
TRIMMER CAPACITORS
Gigahertz trimmers
Model 0
Model 1
Model 3
Model 4
Model 5
Model 9
Note 1:
Note 2:
Note 3:
Note 4:
ATX726 series can be delivered with permanent sealing cap AT69600
ATX727, ATX728 and ATX729 can be delivered with permanent sealing cap AT69700
Total length A is increased by 0.1 mm with permanent sealing cap
ATX727, ATX728 and ATX729 series can be supplied with removable sealing cap AT69800
For fixing hole layout dimensions and tolerances,
consult page
10-40
For special and custom design models,
consult page
10-35
Non-magnetic Gigahertz trimmer capacitors
For nuclear magnetic resonance, medical electronics and other very low magnetic signature
applications, TEKELEC TEMEX produces a non-magnetic trimmer capacitors (model AT57290) ; this
model has a capacity range from 0.8 to 8.0 pF.
Packaging
- Bulk:
TEKELEC TEMEX standard bulk packaging
- Tape & reel: ATX7263, ATX7273 and ATX7283 are available on TEKELEC TEMEX standard tape and
reel packaging in quantities of 500 pieces per reel on carrier tape 16 mm width. Units
include permanent sealing cap.
TEKELEC TEMEX tuning tools
AT8762 for ATX726 SERIES
SALES OFFICES
AMERICA: +1 (602) 780 1995
BELGIUM: +32 (0) 2 715 90 20
FRANCE: +33 (0) 1 49 88 49 00
/
AT8777 for ATX727, ATX728 andX729.
WEB SITE: http://www.tekelec-temex.com
10-17
ASIA PACIFIC: +852 2813 9826
GERMANY: +49 (0) 89 51 64-0
ITALY: +39 (0) 2 58 01 91 06
/
EUROPE: +33 (0) 1 49 88 49 00
/
AFRICA: +33 (0) 1 49 88 49 00
NL: +31 (0) 79 3461430
UK: +44 (0) 1256 883340
NORDIC: +46 (0) 8 590 303 00
SPAIN: +34 (0) 1 320 41 60
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