ALPHA AV109-73

Preliminary
GaAs IC 35 dB Voltage Variable Attenuator
Single Positive 3 V Control 0.8–1.0 GHz
AV109-73
Features
SOT-6
■ Single Positive 3 V Control Voltage
0.074
(1.90 mm REF.)
■ 35 dB Attenuation Range @ 0.9 GHz
■ Excellent Linearity Performance
0.126 (3.20 mm)
0.087 (2.20 mm)
PIN 6
0.071 (1.80 mm)
0.052 (1.30 mm)
PIN 1
INDICATOR
PIN 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.
0.020 (0.51 mm)
0.014 (0.350 mm)
0.037 (0.95 mm) REF.
0.057 (1.45 mm)
0.035 (0.90 mm)
0.006
(0.15 mm)
0.000
(0.00 mm)
0.012
(0.30 mm)
TYP.
5.0˚ ± 1˚
0.014
(0.26 mm)
0.004
(0.10 mm)
5.0˚ ± 1˚
0.122 (3.10 mm)
0.106 (2.70 mm)
0.022 (0.61 mm)
0.004 (0.10 mm)
Electrical Specifications at 25°C (VS = 3 V)
Parameter1
Frequency
Min.
Typ.
Max.
Unit
Insertion Loss (VC = 0 V)
0.8–1.0 GHz
3.3
dB
Maximum Attenuation (VC = 3 V)2
0.8–1.0 GHz
35
dB
VSWR (I/O)3
0.5–2.5 GHz
2.0:1
Operating Characteristics at 25°C (VS = 3 V)
Parameter1
Condition
Switching Characteristics
Rise, On (10/90% or 50% CTL to 90% RF)
Fall, Off (90/10% RF or 50% CTL to 10% RF)
Intermodulation Intercept Point (IIP3)3
For Two-tone Input Power +0 dBm
Frequency
Min.
Typ.
Max.
0.9 GHz
Control Voltage (VC)
14
0.0
dBm
VS
Supply Voltage (VS)
3
Control Current (IC)
Supply Current (IS)
0.2 x VC
150
Unit
µS
µS
1.0
0.3
V
mA
µA
1. All measurements made in a 50 Ω system, unless otherwise specified.
2. Maximum attenuation includes insertion loss.
3. For worst case state.
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
1
GaAs IC 35 dB Voltage Variable Attenuator Single Positive 3 V Control 0.8–1.0 GHz
AV109-73
Typical Performance Data @ 0.9 GHz
0
2.0
-5
1.9
1.8
-10
1.7
-15
VSWR
Attenuation (dB)
(Unless Otherwise Specified)
-20
-25
1.6
1.5
Input
1.4
1.3
-30
1.2
-35
1.1
-40
Output
1.0
0
0.5
1.0
1.5
2.0
2.5
0
3.0
0.5
VC (V)
Absolute Maximum Ratings
2.5
3.0
VSWR vs. Control Voltage
Value
Storage Temperature
-65°C to +150°C
VS
CBL
VC
CBL
4
-40°C to +85°C
GND
5
Operating Temperature
6
+3.3 V
3
Control Voltage
J1
2
+7 V
1
50 mW > 500 MHz
Supply Voltage
CBP
J2
GND
25°C/W
Note: Exceeding these parameters may cause irreversible damage.
2
2.0
Pin Out
RF Input Power
ΘJC
1.5
VC (V)
Attenuation vs. Control Voltage
Characteristic
1.0
DC blocking capacitors (CBL) and RF bypass capacitors (CBP) supplied externally.
CBL = 25 pF for 900 MHz operation. CBP = 38 pF for 900 MHz operation.
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