THERMAL VARIABLE ATTENUATORS
E-TA
■
APPLICATIONS
Temperature compensation of microwave high power
amplifier.
■
FEATURES
Flat VSWR characteristic to the temperature change.
Linear attenuation characteristic to temperature fluctuation.
RoHS compliant.
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SPECIFICATIONS
Electrical characteristics
E-TA3216
Attenuation
Tolerance
Impedance
VSWR
DC ~ 2 GHz : Less than 1.3
2 ~ 3 GHz : Less than 1.7
(at 25 °C)
1, 2, 3, 4, 5 dB
at 25 °C
DC ~ 3 GHz : +0.5 dB, DC ~ 1 GHz : -0.5 dB
1 ~ 3 GHz : -1.0dB (at 25 °C, 50
Ω
load)
50
Ω
Less than 1.3
(at 25 °C)
E-TA2012
1, 2, 3, 4, 5, 6, 7, 8, 9, 10 dB
at 25 °C
± 0.5 dB
(at 25 °C, 50
Ω
load)
Temperature Coefficient
N5 ∼ N8 at 1 GHz：
N1 ∼ N8 at 1 GHz：
Please refer to the chart of “Example of Attenuation vs. Temperature” Please refer to the chart of “Example of Attenuation vs. Temperature”
Frequency Range
Power Rating
Operating Temperature Range
Temperature Characteristics
TCA : Temperature Coefficient of Attenuation N1 ~ N8 (dB/dB/°C)
N1 ; – 0.0119
N2 ; – 0.0088
N3 ; – 0.0062
N4 ; – 0.0047
N5 ; – 0.0041
N6 ; – 0.0035
100 mW
DC ~ 3 GHz
63 mW
– 40 °C ~ +100 °C
N7 ; – 0.0026
N8 ; – 0.0019
Note. Temperature coefficient of E-TA3216 is N5 ~ N8 and E-TA2012 is N1 ~ N8.
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PART NUMBER DESIGNATION
E-TA2012 T 1 dB N8
Series name and size
E-TA3216, E-TA2012
Temperature Coefficient of Attenuation
(N1, N2, N3, N4, N5, N6, N7, N8)
Form of packaging
T : Taping (1000 pcs/reel)
Blank : Bulk (100 pcs/in plastic bags)
Attenuation [dB]
(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
E-TA
THERMAL VARIABLE ATTENUATORS
■
OUTLINE DIMENSIONS
E-TA3216
Unless otherwise specified, tolerance :
±
0.2 (Unit : mm)
3.2
0.2
1.0
0.15
0.8
1.0
0.2
0.45
E-TA2012
Unless otherwise specified, tolerance :
±
0.2 (Unit : mm)
2.0
0.7
0.45
Side view
1.0 max
Date code
①, ②
In/ Out terminal
①
②
マーカ
Marker
Date code
①, ②
In/ Out terminal
①
②
マーカ
Marker
Top view
③
④
Unit marked on
this surface
0.25
1.6
③
④
Unit marked on
this surface
③, ④
Ground terminal
③, ④
Ground terminal
＜
Marking
＞
Date code (2 digits)
9 A
Year
（
One last digit)
Month(A~H,J,Y,L,M)
Model code (3 digits)
1 N1
Attenuation(1~10dB)
Temperature Coefficient of attenuation(N1~N8)
1.25
Top view
0.3
0.15
0.15
0.9
Side view
E-TA
THERMAL VARIABLE ATTENUATORS
■
RECOMMENDED PAD OUTLINE DIMENSIONS
Unless otherwise specified, tolerance :
±
0.3 (Unit : mm)
E-TA3216
3.0
1.2
0.55
0.6
1.2
E-TA2012
2.3
0.8
0.7
0.7
0.8
0.9
0.5
0.55
2.0
0.7
Note) The zero point is center of mounting
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EXAMPLE OF ATTENUATION VS. TEMPERATURE : 3 dB
● E-TA2012 3dB N*
5.5
N1
3 dB Attenuation vs. Temperature
5.0
N2
4.5
N3
4.0
N4
3.5
3.0
2.5
2.0
1.5
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100
1.9
0
0
N5
N6
N7
N8
E-TA
THERMAL VARIABLE ATTENUATORS
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ENVIRONMENTAL CHARACTERISTICS
Test item
A short time overload voltage
Load life
Test conditions
Apply the rated voltage of 2.5 times for 5 sec.
70 ± 3 °C, Apply rated voltage for 90 minutes followed by 30 minutes
Intermission. This cycle is repeated for 1000 hours.
60 ± 2 °C, 90 ~ 95 %RH, Apply rated voltage for 90 minutes followed by
30 minutes Intermission. This cycle is repeated for 1000 hours.
Thermal shock
Vibration
– 40 °C ~ 100 °C (0.5 h), 5 cycles
（Vibration）10 ∼ 55 Hz、
（Amplitude）1.5 mm、
10-55-10 Hz/minutes、xyz 2h each
Specifications
Attenuation ± 0.1 dB
Attenuation ± 0.2 dB
Attenuation ± 0.2 dB
Attenuation ± 0.1 dB
Attenuation ± 0.1 dB
Soldering heat
Peak temperature 255 °C, two times maximum
Attenuation ± 0.1 dB
Solderability
245 ± 5 °C (lead free), 3 ± 0.5 s
95 % or more of the immersed area
should be adequately wetted.
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REFLOW PROFILE FOR SOLDERING HEAT EVALUATION
(°C)
250
Temperature
200
150
100
50
Peak : 250
+5
0
°C
Over 230
°C
180
°C
150
°C
Pre Heating Zone
90
±
30 s
30
±
10 s
Heating time
Soldering Zone
Reflow : two times maximum
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PACKAGING SPECIFICATIONS
Taping packaging specifications
Bulk pack specifications
E-TA
THERMAL VARIABLE ATTENUATORS
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CAUTION
①
②
③
④
①
②
③
④
⑤
⑥
⑦
use.
Note1. Specifications are subject to change without notice.
Specifications in this catalog are reference.
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