G
iga
H
ertz
Sapphire Trimmer Capacitors
R
O
HS
COMPLIANT
D
ESCRIPTION
Sapphire dielectric
High self resonance frequency and very good Q
Rated voltage 500 VDC
Multi-turn, very fine resolution
Low temperature coefficient
Low capacitance drift and very stable over time
Self-locking constant torque drive mechanism
Surface mount models available on tape and reel
Meet MIL-C-144409
Compliant to ESA/SCC 3010
Terminations are
gold plated
Non magnetic
model
ROHS
compliant
High Reliability
versions available on special order
Custom design upon request
Maximum Soldering Temperature 260° 3 s Max
C,
A
PPLICATIONS
RF power amplifier
Filter tuning
Crystal trimming
Impedance matching
Low power amplifiers
Medical applications
Dielectric constant of sapphire does not change with frequency and temperature. Sapphire is
inert crystal, moisture resistant and mechanically strong.
I. E
LECTRICAL
S
PECIFICATIONS
P/N
Capacitance range
Standard models
AT 272X8 models
Working Voltage
Test Voltage
Working Temp. range
Temp. Coeff.
Standard models
AT 272X8 models
Q factor @ Max Capacitance
Insulation Resistance
AT 2726X ROHS
AT SM260 ROHS
AT 2727X ROHS
AT SM270 ROHS
AT 2728X ROHS
AT SM280 ROHS
AT 27290X ROHS
AT SM290 ROHS
0.3 to 1.2 pF
0.35 to 1.2 pF
> 4 turns
0.6 to 4.5 pF
0.4 to 2.5 pF
0.65 to 4.5 pF
0.45 to 2.5 pF
> 8 turns
> 4 turns
500 VDC
1000 VDC
-55° to + 125°
C
C
0+/-50 ppm/°
C
0+/-50 ppm/°
C
-50+/-75 ppm/°
C
-50+/-75 ppm/°
C
>3000
>4000
@250 MHz
@250 MHz
>10000 M min @ 500 VDC
0.8 to 8.0 pF
0.85 to 8.0 pF
> 16 turns
0+/-50 ppm/°
C
-50+/-75 ppm/°
C
>5000
@250 MHz
0+/-75 ppm/°
C
-50+/-75 ppm/°
C
>3000
@100 MHz
TEMEX – CERAMICS,
PARC INDUSTRIEL BERSOL 1, VOIE ROMAINE, 33600 PESSAC, France
TEL +33(0)5 56 46 66 66 FAX +33(0)5 56 36 31 98
www.temex-ceramics.com
FTC-GigaHertz.doc Ed 2
TEMEX Ceramics reserves the right to modify herein specifications and information at any time when necessary to provide optimum performance and cost.
G
iga
H
ertz
Sapphire Trimmer Capacitors
R
O
HS
COMPLIANT
II. Q
UALITY
F
ACTOR
Typical Q factor of ROHS GigaHetz series tuned at Max capacitance
10000
1000
100
10
1
0
150
300
400
500
600
750
1000
1250
1500
1750
Frequency MHz
AT 2726's
AT 2727's
AT 2728's
AT 2729's
III. M
ECHANICAL &
G
ENERAL
S
PECIFICATIONS
P/N
Rotating Torque
Max Torque on rotor stop
Rotational life
Vibration
Shock
AT 2726X ROHS AT 2727X ROHS AT 2728X ROHS AT 27290X ROHS
AT SM260 ROHS AT SM270 ROHS AT SM280 ROHS AT SM290 ROHS
7 to 60 g.cm
80 g.cm
10 to 100 g.cm
10 to 100 g.cm
150 g.cm
120 g.cm
> 800 revolutions
60g, 10-2000 Hz
100g, 6ms
10 to 100 g.cm
150 g.cm
VI S
ELF
R
ESONANT
F
REQUENCY
For surface mount version, self resonant frequency is improving when width of terminal is increasing.
With more width terminal, Equivalent Serial Resistance (ESR) is lower.
As example for the same capacity range, self resonant frequency of model 8 is higher than for model 3.
TEMEX – CERAMICS,
PARC INDUSTRIEL BERSOL 1, VOIE ROMAINE, 33600 PESSAC, France
TEL +33(0)5 56 46 66 66 FAX +33(0)5 56 36 31 98
www.temex-ceramics.com
FTC-GigaHertz.doc Ed 2
TEMEX Ceramics reserves the right to modify herein specifications and information at any time when necessary to provide optimum performance and cost.
Q facto r
G
iga
H
ertz
Sapphire Trimmer Capacitors
R
O
HS
COMPLIANT
V. M
ODELS
Model 0
Model 1
Terminal 1.0 mm width x 0.2 mm thickness
Model 3
Model 8
TEMEX Ceramics reserves the right to modify herein specifications and information at any time when necessary to provide optimum performance and cost.
Terminal 1.0 mm width x 0.2 mm thickness
AT SM series
Terminals are gold plated
Others models available upon request
Custom designs available upon request
VI. D
IMENSIONS in mm
X is the model
P/N
AT 2726X ROHS
AT 2727X ROHS
AT 2728X ROHS
AT 2729X ROHS
A
5.8
8.0
5.8
12.3
B
1.9
3.0
3.0
3.0
C
2.0
3.2
2.0
6.4
E
1.9
2.8
2.8
2.8
H
5.9
5.9
5.9
5.9
L
3.1
4.1
4.1
4.1
R1
2.3
2.8
2.8
2.8
R2
2;8
3.3
3.3
3.3
P/N
AT SM260 ROHS
AT SM270 ROHS
AT SM280 ROHS
AT SM290 ROHS
M
6.4
8.8
6.6
13.1
N
0.8
1.0
1.0
1.0
P
5.1
7.6
5.1
11.4
Q
3.0
4.0
4.0
4.0
TEMEX – CERAMICS,
PARC INDUSTRIEL BERSOL 1, VOIE ROMAINE, 33600 PESSAC, France
TEL +33(0)5 56 46 66 66 FAX +33(0)5 56 36 31 98
www.temex-ceramics.com
FTC-GigaHertz.doc Ed 2
G
iga
H
ertz
Sapphire Trimmer Capacitors
R
O
HS
COMPLIANT
VII. N
ON
M
AGNETIC
M
ODEL
AT 57290 ROHS
is a Non Magnetic RoHS GigaHertz trimmer capacitor with a very low magnetic
signature, made of non magnetic alloy and silver plated, specially designed for medical applications such as
MRI, NMR and spectroscopy.
Outline Drawing, E
lectrical Characteristics,
Mechanical Specifications and Dimensions
Capacitance range (pF)
Working Voltage (VDC)
Withstanding Voltage (VDC)
Working Temp. range
Temp. Coeff. (ppm/°
C)
Q factor @ Max Capacitance
Insulation Resistance (M )
Rotating Torque g.cm
Max Torque on rotor stop g.cm
A in mm
B in mm
0.8 to 8.0
500
1000
-55° to + 125°
C
C
375+/-75
>3000
@100 MHz
10000 min @ 500 VDC
10 to 100
150
12.3
3.0
VIII. S
OLDERING
Typical solder pad layout
AT 27263 ROHS, AT 27273 ROHS, AT 27283 ROHS, AT 27293 ROHS models
Dia A
1.2
Dim in mm
2.0
AT 27263 ROHS
2.4
1.7
Dia A
B
B
AT 27273 ROHS
AT 27283 ROHS
AT 27293 ROHS
3.6
2.3
AT SM Models
L+/-0.2
A +/-0.2
Dim in
mm
X+/-0.1
L
A
X
AT
SM 260
ROHS
6.2
3.2
3.4
AT
SM 270
ROHS
8.7
5.2
4.4
AT
SM 280
ROHS
6.2
2.8
4.4
AT
SM 290
ROHS
12.5
9.0
4.4
TEMEX – CERAMICS,
PARC INDUSTRIEL BERSOL 1, VOIE ROMAINE, 33600 PESSAC, France
TEL +33(0)5 56 46 66 66 FAX +33(0)5 56 36 31 98
www.temex-ceramics.com
FTC-GigaHertz.doc Ed 2
time when necessary to provide optimum performance and cost.
TEMEX Ceramics reserves the right to modify herein specifications and information at any time when necessary to provide optimum performance and cost.
G
iga
H
ertz
Sapphire Trimmer Capacitors
R
O
HS
COMPLIANT
AT 27268 ROHS
AT 27278 ROHS, AT 27288 ROHS, AT 27298 ROHS
Recommended reflow solder temperature profile
C
Maximum Soldering Temperature
260° MAX
Temp °
C
260°
C
220°
C
PEAK 3 s Max
180°
C
150°
C
PREHEAT
1 to 2 mn
HEATING
30 to 60 s
Time
Hand soldering :
Use a temperature controlled 40 Watts iron set at 260° maximum. The solder joint
C
should be made on 3 seconds or less.
IX.
R
ECOMMENDATIONS
F
OR
C
LEANING
es the right to modify herein specifications and information at any time when necessary to provide optimum performance and cost.
GigaHertz Trimmer capacitors are compatible with a wide variety of cleaning process including those
that utilize aqueous or semi-aqueous solutions, alcohol solutions, de-ionized water and numerous other
cleaners. However, due to the large variety of such processes, the customer through cleaning process
evaluation in conjunction with TEMEX-CERAMICS product purchased must determine actual compatibility.
Capacitors without sealing caps should be protected from intrusion of cleaning solutions in the internal bushing
thread. It is recommended these units be installed after circuit boards have been cleaned. Units with seal caps
may be immersed in liquid, vapour and ultrasonic system.
X. P
ACKAGING
Parts are delivered in bulk for quantity lower than 500 p.
GigaHertz trimmers AT 27263 ROHS, AT 27273 ROHS, AT 27283 ROHS, AT 27268 ROHS, AT 27278
ROHS, AT 27288 ROHS, AT SM 270 ROHS and AT SM 280 ROHS are available on tape and reel, quantity per
reel 500p.
Models 0 and 1, trimmers AT 27293 ROHS, AT 27298 ROHS and AT SM 290 ROHS are not available
on tape.
When delivered on tape, GigaHertz trimmers include a permanent sealing cap which is moisture proof
and resists intrusion of dirt, dust, solder flux and cleaning agents, and allows easy access, accurate tuning after
assembly and cleaning. References of sealing caps are AT 69600 for AT 2726X ROHS family and AT 69700 for
AT 2727X ROHS, AT 2728X ROHS and AT 2729X ROHS families. For sealing caps of AT SM series, contact
TEMEX – CERAMICS,
PARC INDUSTRIEL BERSOL 1, VOIE ROMAINE, 33600 PESSAC, France
TEL +33(0)5 56 46 66 66 FAX +33(0)5 56 36 31 98
www.temex-ceramics.com
FTC-GigaHertz.doc Ed 2
RF/无线
