ALPHA AV108-59

Preliminary
GaAs IC 35 dB Voltage Variable Attenuator
Single Positive 3 V Control 0.5–2.5 GHz
AV108-59
Features
MSOP-8
■ Single Positive +3 V Control Voltage
■ 35 dB Attenuation Range @ 0.9 GHz
0.0256 (0.65 mm) TYP.
PIN 1
INDICATOR
0.118 (3.00 mm)
± 0.004 (0.1 mm)
SQ.
■ Excellent Linearity Performance
Description
PIN 1
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.
0.012 (0.30 mm)
7.0˚
0.038 (0.95 mm) TYP.
0.030 (0.75 mm)
0.017
(0.43 mm)
0.193 (4.90 mm)
REF.
+ 0.006 (0.15 mm)
- 0.002 (0.05 mm)
0.007 (0.18 mm)
± 0.005 (0.12 mm)
0.006 (0.15 mm)
0.002 (0.05 mm)
8.0˚
MAX.
0.028 (0.70 mm)
0.016 (0.40 mm)
Electrical Specifications at 25°C (VS = 3 V)
Parameter1
Frequency
Insertion Loss (VC = 0 V)
0.5–1.0 GHz
1.0–2.0 GHz
2.0–2.5 GHz
Maximum Attenuation (VC = 3 V)2
0.5–0.8
0.8–1.0
1.0–1.7
1.7–2.0
2.0–2.5
VSWR (I/O)3
0.5–2.5 GHz
GHz
GHz
GHz
GHz
GHz
Min.
25
34
28
25
23
Typ.
Max.
Unit
3.4
3.5
3.8
3.6
3.8
4.2
dB
dB
dB
32
37
33
30
26
dB
dB
dB
dB
dB
1.8:1
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.
0.9 GHz
Control Voltage (VC)
Typ.
Max.
Unit
1.0
0.3
µS
µS
10
dBm
0.0
VS
V
Supply Voltage (VS)
3
V
Control Current (IC)
0.2 x VC
mA
Supply Current (IS)
150
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 [email protected] • www.alphaind.com
Specifications subject to change without notice. 3/99A
1
GaAs IC 35 dB Voltage Variable Attenuator Single Positive 3 V Control 0.5–2.5 GHz
AV108-59
Typical Performance Data @ 0.9 GHz
(Unless Otherwise Specified)
0.0
0
Maximum Attenuation (dB)
Insertion Loss (dB)
-0.5
-1.0
-1.5
-20.
-2.5
-3.0
-3.5
-4.0
-4.5
-5.0
-10
-15
-20
-25
-30
-35
-40
0.5
1.0
1.5
2.0
2.5
0.50
1.00
1.50
2.50
Frequency (GHz)
Insertion Loss vs. Frequency
Maximum Attenuation vs. Frequency
0
2.0
-5
1.9
1.8
-10
1.7
-15
-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
3.0
0
0.5
1.0
VC (V)
1.5
2.0
2.5
3.0
VC (V)
Attenuation vs. Control Voltage
VSWR vs. Control Voltage
5
30
Attenuation Normalized to 25˚C
4
Insertion Loss (dB)
25
IIP3 (dBm)
2.00
Frequency (GHz)
VSWR
Attenuation (dB)
-5
20
15
10
5
3
85˚C
2
1
70˚C
0
25˚C
-1
-2
-20˚C
-3
-4
0
-5
0
0.5
1.0
1.5
2.0
2.5
3.0
0
0.5
VC (V)
1.5
2.0
2.5
3.0
VC (V)
Input IP3 vs. Control Voltage
2
1.0
Attenuation vs. Control Voltage
Over Temperature
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com
Specifications subject to change without notice. 3/99A
GaAs IC 35 dB Voltage Variable Attenuator Single Positive 3 V Control 0.5–2.5 GHz
Absolute Maximum Ratings
Characteristic
Pin Out
Value
Storage Temperature
-65°C to +150°C
ΘJC
25°C/W
GND
5
-40°C to +85°C
CBL
VC
CBL
VS
4
Operating Temperature
J1
GND
6
+3.3 V
7
Control Voltage
8
+7 V
GND
3
Supply Voltage
GND
2
50 mW > 500 MHz
1
RF Input Power
AV108-59
J2
DC blocking capacitors (CBL) supplied externally.
CBL = 25 pF for operation >500 MHz.
Note: Exceeding these parameters may cause irreversible damage.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com
Specifications subject to change without notice. 3/99A
3