Preliminary
GaAs IC 35 dB Voltage Variable Attenuator
Single Positive 3 V Control 0.5鈥?.5 GHz
AV108-59
Features
s
Single Positive +3 V Control Voltage
s
35 dB Attenuation Range @ 0.9 GHz
s
Excellent Linearity Performance
PIN 1
INDICATOR
MSOP-8
0.0256 (0.65 mm) TYP.
0.118 (3.00 mm)
鹵 0.004 (0.1 mm)
SQ.
0.193 (4.90 mm)
REF.
Description
The AV108-59 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. Its attenuation range at 1900 MHz
is 25 dB. It operates with supply voltage of +3 V and control
voltage of 0 V to +3 V in a low cost MSOP-8 package. The
RF ports require 25 pF DC blocking capacitors.
PIN 1
0.012 (0.30 mm)
+ 0.006 (0.15 mm)
- 0.002 (0.05 mm)
7.0藲
0.038 (0.95 mm) TYP.
0.030 (0.75 mm)
0.017
(0.43 mm)
0.007 (0.18 mm)
鹵 0.005 (0.12 mm)
8.0藲
MAX.
0.006 (0.15 mm)
0.002 (0.05 mm)
0.028 (0.70 mm)
0.016 (0.40 mm)
Electrical Specifications at 25擄C (V
S
= 3 V)
Parameter
1
Insertion Loss (V
C
= 0 V)
Frequency
0.5鈥?.0 GHz
1.0鈥?.0 GHz
2.0鈥?.5 GHz
0.5鈥?.8
0.8鈥?.0
1.0鈥?.7
1.7鈥?.0
2.0鈥?.5
GHz
GHz
GHz
GHz
GHz
25
34
28
25
23
Min.
Typ.
3.4
3.5
3.8
32
37
33
30
26
1.8:1
Max.
3.6
3.8
4.2
Unit
dB
dB
dB
dB
dB
dB
dB
dB
Maximum Attenuation (V
C
= 3 V)
2
VSWR (I/O)
3
0.5鈥?.5 GHz
Operating Characteristics at 25擄C (V
S
= 3 V)
Parameter
1
Switching Characteristics
Intermodulation Intercept Point (IIP3)
3
Control Voltage (V
C
)
Supply Voltage (V
S
)
Control Current (I
C
)
Supply Current (I
S
)
1. All measurements made in a 50
鈩?/div>
system, unless otherwise specified.
2. Maximum attenuation includes insertion loss.
3. For worst case state.
Condition
Rise, On (10/90% or 50% CTL to 90% RF)
Fall, Off (90/10% RF or 50% CTL to 10% RF)
For Two-tone Input Power +0 dBm
Frequency
Min.
Typ.
1.0
0.3
Max.
Unit
碌S
碌S
dBm
0.9 GHz
0.0
10
V
S
3
0.2 x V
C
150
V
V
mA
碌A(chǔ)
Alpha Industries, Inc.
[781] 935-5150
鈥?/div>
Fax
[617] 824-4579
鈥?/div>
Email
sales@alphaind.com
鈥?/div>
www.alphaind.com
Specifications subject to change without notice. 3/99A
1
1
2
3
