ALPHA AV104-12

Preliminary
GaAs IC 25 dB Voltage Variable Attenuator
Single Positive Control 0.5–2.5 GHz
AV104-12
Features
SOIC-8
■ Single Positive +5 V Control Voltage
PIN 8
0.050 (1.27 mm) BSC
■ 25 dB Attenuation Range @ 0.9 GHz
■ High IP3 (20 dBm @ 0.9 GHz)
0.244 (6.20 mm)
0.228 (5.80 mm)
PIN 1
INDICATOR
■ Excellent Linearity Performance
0.020 (0.51 mm) MAX.
PIN 1
Description
The AV104-12 GaAs IC FET voltage variable attenuator
provides 25 dB attenuation range at 900 MHz controlled
by a single positive voltage. The VVA has a linear transfer
curve of 5 dB/V slope, with input and output VSWR better
than 1.4:1 over all states. Its attenuation range at 1900
MHz is 22 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.
0.068
(1.73 mm) MAX.
0.197 (5.00 mm)
0.189 (4.80 mm)
0.010 (0.25 mm)
0.004 (0.10 mm)
0.016 MAX.
(0.41 mm) x
45˚ CHAMFER
0.049
(1.24 mm)
0.016
(0.41 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 (VS = 5 V)
Parameter1
Frequency
Insertion Loss (VC = 5 V)
0.5–1.0 GHz
1.0–2.0 GHz
2.0–2.5 GHz
Maximum Attenuation (VC = 0 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.
16
21
19
17
15
Typ.
Max.
Unit
2.7
3.0
3.2
3.0
3.4
3.7
dB
dB
dB
20
25
23
21
19
dB
dB
dB
dB
dB
1.4:1
Operating Characteristics at 25°C (VS = 5 V)
Parameter
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
1.5
µS
µS
20
dBm
0.0
VS
V
Supply Voltage (VS)
5.0
V
Control Current (IC)
2.5
mA
Supply Current (IS)
2.5
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 25 dB Voltage Variable Attenuator Single Positive Control 0.5–2.5 GHz
AV104-12
Typical Performance Data @ 0.9 GHz
0
0
-1
-5
Attenuation (dB)
Insertion Loss (dB)
(Unless Otherwise Specified)
-2
-3
-4
-10
-15
-20
-25
-5
0.5
1.0
1.5
2.0
-30
2.5
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
Frequency (GHz)
VC (V)
Insertion Loss vs. Frequency
Attenuation vs. Control Voltage
1.5
40
35
1.4
IIP3 (dBm)
VSWR
30
1.3
1.2
Input
20
15
10
1.1
5
Output
1
0
25
0
1
2
3
4
5
0
1
2
3
4
VC (V)
VC (V)
VSWR vs. Control Voltage
Input IP3 vs. Control Voltage
1.5
Attenuation Normalized to 25˚C
Attenuation (dB)
1.0
85˚C
0.5
0
-0.5
-20˚C
-1.0
-1.5
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VC (V)
Attenuation vs. Control Voltage
Over Temperature
2
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com
Specifications subject to change without notice. 3/99A
5
GaAs IC 25 dB Voltage Variable Attenuator Single Positive Control 0.5–2.5 GHz
Absolute Maximum Ratings
Characteristic
Pin Out
Value
Control Voltage
-0.2 V < VC < VS +0.2 V
-40°C to +85°C
CBL
GND
5
J1
GND
6
ΘJC
-65°C to +150°C
GND
3
Storage Temperature
GND
7
+4 to +8 V
8
Supply Voltage
2
100 mW > 500 MHz
1
RF Input Power
Operating Temperature
AV104-12
VC
CBL
J2
25°C/W
VS
4
Note: Exceeding these parameters may cause irreversible damage.
DC blocking capacitors (CBL) supplied externally.
CBL = 25 pF for operation >500 MHz.
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