Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579 Email sales@alphaind.com www.alphaind.com
1
Specifications subject to change without notice. 10/99A
Parameter
1
Condition
Frequency
Min.
Typ.
Max.
Unit
Switching Characteristics
Rise, On (10/90% or 50% CTL to 90% RF)
1.0
S
Fall, Off (90/10% RF or 50% CTL to 10% RF)
0.3
S
Intermodulation Intercept Point (IIP3)
3
For Two-tone Input Power +0 dBm
0.9 GHz
14
dBm
Control Voltage (V
C
)
0.0
V
S
V
Supply Voltage (V
S
)
3
Control Current (I
C
)
0.2 x V
C
mA
Supply Current (I
S
)
150
A
GaAs IC 35 dB Voltage Variable Attenuator
Single Positive 3 V Control 0.81.0 GHz
Features
I Single Positive 3 V Control Voltage
I 35 dB Attenuation Range @ 0.9 GHz
I Excellent Linearity Performance
SOT-6
AV109-73
0.074
(1.90 mm REF.)
0.071 (1.80 mm)
0.052 (1.30 mm)
0.037 (0.95 mm) REF.
0.122 (3.10 mm)
0.106 (2.70 mm)
0.006
(0.15 mm)
0.000
(0.00 mm)
0.057 (1.45 mm)
0.035 (0.90 mm)
0.020 (0.51 mm)
0.014 (0.350 mm)
0.126 (3.20 mm)
0.087 (2.20 mm)
PIN 6
PIN 1
PIN 1
INDICATOR
0.022 (0.61 mm)
0.004 (0.10 mm)
0.014
(0.26 mm)
0.004
(0.10 mm)
0.012
(0.30 mm)
TYP.
5.0 1
5.0 1
Description
The AV109-73 GaAs IC FET voltage variable attenuator
provides 35 dB attenuation range at 900 MHz controlled
by a single positive voltage. The VVA has a linear transfer
curve of 12 dB/V slope, with input and output VSWR better
than 2:1 over all states. It operates with supply voltage of
+3 V and control voltage of 0 V to +3 V in a low cost
SOT-6 package. The RF ports require 25 pF DC blocking
capacitors. In addition, an external grounding capacitor is
required.
Parameter
1
Frequency
Min.
Typ.
Max.
Unit
Insertion Loss (V
C
= 0 V)
0.81.0 GHz
3.3
dB
Maximum Attenuation (V
C
= 3 V)
2
0.81.0 GHz
35
dB
VSWR (I/O)
3
0.52.5 GHz
2.0:1
Electrical Specifications at 25C (V
S
= 3 V)
Operating Characteristics at 25C (V
S
= 3 V)
1. All measurements made in a 50
system, unless otherwise specified.
2. Maximum attenuation includes insertion loss.
3. For worst case state.
Preliminary
GaAs IC 35 dB Voltage Variable Attenuator Single Positive 3 V Control 0.81.0 GHz
AV109-73
2
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579 Email sales@alphaind.com www.alphaind.com
Specifications subject to change without notice. 10/99A
2.5
2.0
3.0
1.5
V
C
(V)
Attenuation vs. Control Voltage
Attenuation (dB)
0
0.5
1.0
-40
-35
-30
-25
-20
-15
-10
-5
0
V
C
(V)
VSWR vs. Control Voltage
VSWR
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
Input
Output
2.5
2.0
3.0
1.5
0
0.5
1.0
Typical Performance Data @ 0.9 GHz
(Unless Otherwise Specified)
GND
V
S
J
1
C
BL
GND
V
C
J
2
C
BL
C
BP
12
3
65
4
Characteristic
Value
RF Input Power
50 mW > 500 MHz
Supply Voltage
+7 V
Control Voltage
+3.3 V
Operating Temperature
-40C to +85C
Storage Temperature
-65C to +150C
JC
25C/W
Absolute Maximum Ratings
Pin Out
DC blocking capacitors (C
BL
) and RF bypass capacitors (C
BP
) supplied externally.
C
BL
= 25 pF for 900 MHz operation. C
BP
= 38 pF for 900 MHz operation.
Note: Exceeding these parameters may cause irreversible damage.
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