ALPHA AV105-12 Datasheet

Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [e-mail] • www.alphaind.com 1

Specifications subject to change without notice. 3/99A

Parameter Condition Frequency Min. Typ. Max. Unit

Switching Characteristics Rise, On (10/90% or 50% CTL to 90% RF) 350 nS

Fall, Off (90/10% RF or 50% CTL to 10% RF) 250 nS
Intermodulation Intercept Point (IIP3)3For Two-tone Input Power +0 dBm 0.9 GHz 15 dBm
Control Voltage (VC) 0.0 V

S

V
Supply Voltage (VS) 5.0 V
Control Current (IC) 800 µA
Supply Current (IS) 800 µA

GaAs IC 35 dB Voltage Variable Attenuator
Single Positive Control 0.5–2.5 GHz

Features

■ Single Positive +5 V Control Voltage

■ 35 dB Attenuation Range @ 0.9 GHz

■ Excellent Linearity Performance

SOIC-8

AV105-12

0.049

(1.24 mm)

0.016

(0.41 mm)

0.016 MAX.

(0.41 mm) x

45˚ CHAMFER

PIN 1

0.197 (5.00 mm)

0.189 (4.80 mm)

0.068

(1.73 mm) MAX.

0.010 (0.25 mm)

0.004 (0.10 mm)

0.010 (0.25 mm)

0.007 (0.17 mm)

0.158 (4.00 mm)

0.150 (3.80 mm)

8˚

MAX.

0.020 (0.51 mm) MAX.

0.244 (6.20 mm)

0.228 (5.80 mm)

0.050 (1.27 mm) BSC

PIN 8

PIN 1

INDICATOR

Description

The A V105-12 GaAs IC FET voltage variable attenuator
provides 35 dB attenuation range at 900 MHz controlled
by a single positive v oltage.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 v oltage 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.

Parameter

1

Frequency Min. Typ. Max. Unit

Insertion Loss (VC = 5 V) 0.5–1.0 GHz 2.8 3.1 dB

1.0–2.0 GHz 3.2 3.6 dB

2.0–2.5 GHz 3.5 3.8 dB

Maximum Attenuation (VC= 0 V)

2

0.5–0.8 GHz 25 33 dB

0.8–1.0 GHz 35 38 dB

1.0–1.7 GHz 32 35 dB

1.7–2.0 GHz 28 31 dB

2.0–2.5 GHz 26 30 dB

VSWR (I/O)

3

0.5–2.5 GHz 1.8:1

Electrical Specifications at 25°C (VS= 5 V)

Operating Characteristics at 25°C (VS= 5 V)

1.All measurements made in a 50 Ω system, unless otherwise specified.

2.Maximum attenuation includes insertion loss.

3. For worst case state.

Preliminary

GaAs IC 35 dB Voltage Variable Attenuator Single Positive Control 0.5–2.5 GHz AV105-12

2 Alpha Industries, Inc.[781] 935-5150 • Fax [617] 824-4579 • Email [e-mail] • www.alphaind.com

Specifications subject to change without notice. 3/99A

0

-1

-2

-3

-4

2.52.0

Frequency (GHz)

Insertion Loss vs. Frequency

Insertion Loss (dB)

-5

0.5 1.0 1.5

4 53

VC (V)

Attenuation vs. Control Voltage

Attenuation (dB)

0 1 2

-40

-35

-30

-25

-20

-15

-10

-5

0

2.52.0

Frequency (GHz)

Maximum Attenuation vs. Frequency

Maximum Attenuation (dB)

0.5 1.0 1.5

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

Typical Performance Data @ 0.9 GHz

(Unless Otherwise Specified)

4 53

VC (V)

VSWR vs. Control Voltage

VSWR

0 1 2

1.00

1.10

1.20

1.30

1.40

1.50

Input

Output

40

30

15
10

20

4 53

VC (V)

Input IP3 vs. Control Voltage

IIP3 (dBm)

0

0 1 2

35

25

5

4.0 5.03.0

VC (V)

Attenuation vs. Control Voltage

Over Temperature

Attenuation (dB)

0 1.0 2.0

-3.0

-2.0

-1.0

0

1.0

2.0

3.0
Attenuation Normalized to 25˚C

85˚C

-20˚C