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