Preliminary
GaAs IC 35 dB Voltage Variable Attenuator
Single Positive Control 0.5–2.5 GHz
AV105-12
Features
s
Single Positive +5 V Control Voltage
s
35 dB Attenuation Range @ 0.9 GHz
s
Excellent Linearity Performance
PIN 1
INDICATOR
0.244 (6.20 mm)
0.228 (5.80 mm)
SOIC-8
PIN 8
0.050 (1.27 mm) BSC
Description
The AV105-12 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 8 dB/V slope, with input and output VSWR better
than 1.4:1 over all states. Its attenuation range at 1900
MHz is 31 dB. It operates with supply voltage of +5 V and
control voltage of 0 V to +5 V in a low cost SOIC-8
package. The RF ports require 25 pF DC blocking
capacitors.
PIN 1
0.068
(1.73 mm) MAX.
0.020 (0.51 mm) MAX.
0.049
(1.24 mm)
0.016
(0.41 mm)
0.016 MAX.
(0.41 mm) x
45˚ CHAMFER
0.197 (5.00 mm)
0.189 (4.80 mm)
0.010 (0.25 mm)
0.004 (0.10 mm)
0.158 (4.00 mm)
0.150 (3.80 mm)
0.010 (0.25 mm)
0.007 (0.17 mm)
8˚
MAX.
Electrical Specifications at 25°C (V
S
= 5 V)
Parameter
1
Insertion Loss (V
C
= 5 V)
Frequency
0.5–1.0 GHz
1.0–2.0 GHz
2.0–2.5 GHz
0.5–0.8
0.8–1.0
1.0–1.7
1.7–2.0
2.0–2.5
GHz
GHz
GHz
GHz
GHz
25
35
32
28
26
Min.
Typ.
2.8
3.2
3.5
33
38
35
31
30
1.8:1
Max.
3.1
3.6
3.8
Unit
dB
dB
dB
dB
dB
dB
dB
dB
Maximum Attenuation (V
C
= 0 V)
2
VSWR (I/O)
3
0.5–2.5 GHz
Operating Characteristics at 25°C (V
S
= 5 V)
Parameter
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
Ω
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.
350
250
Max.
Unit
nS
nS
dBm
0.9 GHz
0.0
15
V
S
5.0
800
800
V
V
µA
µA
Alpha Industries, Inc.
[781] 935-5150
•
Fax
[617] 824-4579
•
Email
sales@alphaind.com
•
www.alphaind.com
Specifications subject to change without notice. 3/99A
1
ALPHA [ ALPHA INDUSTRIES ]
