The AT002S3鈥?2 GaAs FET MMIC bridge 鈥淭鈥?/div>
attenuator provides 35 dB minimum absolute
attenuation at 900 MHz.
The key feature of this attenuator is the requirement
of only one 鈥減ositive鈥?control voltage. On the RF
terminals, blocking capacitors greater than 0.001
碌f
are necessary.
Operating Characteristics at 25擄C
Impedance
Switching Characteristics
RISE, FALL (10/90% or 90/10% RF)
ON, OFF (50% CTL to 90/10% RF)
Video Feedthru
Attenuation Flatness
0.8鈥?.0 GHz
0鈥?0 dB
11鈥?0 dB
21鈥?0 dB
31鈥揗ax
+ 1.0 dB
+ 1.5 dB
+ 3.5 dB
+ 4.5 dB
50 Ohms Nominal
1.0
1.5
20
碌s
碌s
mV
Typ
Typ
Typ
Typ
Typ
Typ
Typ
Electrical Specifications at 25擄C
Insertion Loss
0.4 鈥?1.0 GHz
1.0 鈥?2.0 GHz
2.0 鈥?2.5 GHz
0.4鈥?.6
0.6鈥?.0
1.0鈥?.5
1.5鈥?.0
2.0鈥?.5
0.4 鈥?2.5 GHz
1.7
2.4
2.9
30
35
30
27
25
2.5:1
dB
dB
dB
dB
dB
dB
dB
dB
Max
Max
Max
Min
Min
Min
Min
Min
Max
Absolute
Attenuation
(V
1
=0V,
V
DD
=5V)
VSWR (I/O)
1,2
1.
2.
Compression Point (900 MHz) Worst Case for all
Attenuation States
0.1 dB
鈥?0
1.0 dB
鈥?
Control Voltages
V1 (Low)
V1 (High)
Bias Voltage, V
DD
0 to 0.2V @ 35
碌A(chǔ)
Max
+5V @ 30
碌A(chǔ)
Max
+5V @ 50
碌A(chǔ)
Max
dBm Typ
dBm Typ
For Insertion Loss and Absolute Attenuation States.
Better VSWR may be obtained by raising the +5V bias to +6V. Set control V1 to
operate from 0 to 6V.
1鈥?2
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ALPHA INDUSTRIES, INC.
鈥?/div>
20 SYLVAN ROAD, WOBURN, MA 01801
TEL: (617) 935鈥?150
鈥?/div>
FAX: (617) 824鈥?579
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