HE891B Datasheet, PDF (1/1 Pages) BOWEI Integrated Circuits CO.,LTD. – Voltage Variable Attenuators

BOWEI
BOWEI INTEGRATED CIRCUITS CO.,LTD.
HE891B/HEM891B
Voltage Variable Attenuators
Features
●Thin film coustraction
●Hermetic package
●Operating temperature range : -55℃ ～+85℃
Specifications( measured in a 50Ωsystem ,Vcc=+5V, TA=-55℃～+85℃)
Parameter
Symbol Unit Guaranteed Typical
Frequency Range ^fL^～fH MHz 20～200
–
Attenuation(Max) AMax dB
57.0
–
Insertion loss
IL
dB
2.3
2.1
VSWR of input/output VSWRi –
1.8:1
1.3:1
VSWR of output VSWRo V
1.8:1
1.3:1
DC Current
ICC
mA
–
10
Control voltage/Current VCO/ ICO _V/mA
–
0～7/0～10
Absolute Maximum Ratings
DC Supply: +7VDC
1
4
2
Input Power:+23dBm
3
Storage Temp:+125℃
TO-8A-1
1
2
HEMXXX
4
Lot number
3
SMO-8C
Application Notes
1.Functional schematic shown as following,which include
an internal coupling capacitor.
2.Interexchangable input and output ports
3.See assembly section for mounting method
15
1.VCC
2
4
2.RF input
HExxx
3.VCO
3
4.RF output
The metal case is Ground
Typical Performance
Attenuation VS. Frequency
0
7.0V
2.0V
10
20
30
40
50
60
70
80
20
0.8V
0.6V
0V
100
200 250
Frequency(MHz)
VSWR VS. Frequency
2.2
2.0
1.8
1.6
1.4
VSWRi
1.2
VSWRo
1.0
20
100
200 250
Frequency(MHz)
Attenuation VS. Temperature
0
10
2.0V
20
0.8V
30
Ta=+25℃
Ta=+85℃
Ta= - 55℃
20
100
200 250
Frequency(MHz)
Attenuation VS.Control voltage
0
f=100MHz
20
40
60
80
0
2
4
6
8 10
Control voltage(V)
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