ALPHA AV141-321 Datasheet

Alpha Industries, Inc. [978] 241-7000 • Fax [978] 241-7906 • Email [e-mail] • www.alphaind.com 1

Specifications subject to change without notice. 1/02A

GaAs IC 25 dB Voltage
Variable Attenuator 2.7–4.0 GHz

Features

■ Power Control for 3.5 GHz Fixed
Wireless Applications

■ Minimum 25 dB Attenuation

■ Positive 0.2–1.2 V Control Voltage

■ QFN-12 3 x 3 mm Package

■ Low Cost

■ No External Components Needed

AV141-321

Description

The AV141-321 is a GaAs IC PHEMT voltage variable
attenuator that has been designed for WLAN applications.
Operating from 2.7–4.0 GHz, the AV141-321 is ideal for
low cost applications such as 3.5 GHz fixed wireless LAN
power control applications.

Parameter Frequency Min. Typ. Max. Unit

Insertion Loss (VC= 1.2 V) 2.7–4.0 GHz 0.7 1.0 dB

Maximum Attenuation (VC= 0.2 V) 2.7–4.0 GHz 25 30 dB

VSWR — All Ports 2.7–4.0 GHz 1.5 1.8

Electrical Specifications at 25°C

Parameter Condition Frequency Min. Typ. Max. Unit

Switching Characteristics Rise, Fall (10/90% or 90/10% RF) 80 50 ns

On, Off (50% CTL to 90/10% RF) 150 ns
Video Feedthru 25 mV

Maximum Input Power 2.7–4.0 GHz 13 dBm
for < 1 dB Attenuation Variation

Input 3rd Order Intercept Point (IIP3) 2.7–4.0 GHz 20 dBm

Control Voltage 0.2 1.2 V

Operating Characteristics at 25°C (0, +1.2 V)

Characteristic Value

RF Input Power 1 W Max. > 500 MHz

Control Voltage -0.2 V, +6 V

Operating Temperature -40°C to +85°C

Storage Temperature -65°C to +150°C

Absolute Maximum Ratings

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

2. For worst case state.

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

2. For worst case state.

Preliminary

GaAs IC 25 dB Voltage Variable Attenuator 2.7–4.0 GHz AV141-321

2 Alpha Industries, Inc. [978] 241-7000 • Fax [978] 241-7906 • Email [e-mail] • www.alphaind.com

Specifications subject to change without notice. 1/02A

Typical Performance Data at 25°C

Frequency (GHz)

Insertion Loss (dB)

Insertion Loss vs. Frequency

-1.0

-0.9

-0.8

-0.7

-0.6

-0.5

-0.4

2.8 3.0 3.2 3.4 3.6 3.8 4.0

Frequency (GHz)

Maximum Attenuation (dB)

Maximum Attenuation vs. Frequency

2.8 3.0 3.2 3.4 3.6 3.8 4.0

-40

-35

-30

-25

-20

-15

-10

-5

0

VC (V)

Attenuation (dB)

Attenuation vs. Control Voltage

-40

-35

-30

-25

-20

-15

-10

-5

0

0.2 0.4 0.6 0.8 1.0 1.2

VC (V)

VSWR

VSWR vs. Control Voltage

0.2 0.4 0.6 0.8 1.0 1.2

1.0

1.2

1.4

1.6

1.8

Input

Output

Frequency (GHz)

VSWR

Output VSWR vs. Frequency

1.0

1.2

1.4

1.6

1.8

2.8 3.0 3.2 3.4 3.6 3.8 4.0

Minimum Attenuation

Maximum Attenuation

Frequency (GHz)

IIP3 (dBm)

Input IP3 vs. Frequency

2.8 3.0 3.2 3.4 3.6 3.8 4.0

18

19

20

21

22