ALPHA AV111-12 Datasheet

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

Specifications subject to change without notice. 6/01A

HIP3™ Variable Attenuator

0.80–1.00 GHz

Features

■ +40 dBm IP3 Typical

■ Low Loss 1 dB Typical

■ Attenuation 30 dB Typical

■ Good VSWR <1.5:1 Typical

■ Low Phase Shift

AV111-12

Description

The AV111-12 is a current controlled variable attenuator
from Alpha’s series of HIP3™ components. It is designed
to meet the wide dynamic range required in spread
spectrum wireless base station applications. A monolithic
quadrature hybrid is teamed with a silicon PIN diode pair
in a plastic surface mount package reducing size and
assuring consistency from part to part.

Parameter Min. Typ. Max. Unit

Frequency 0.80 1.0 GHz

Insertion Loss (0 mA Control Current) 1.0 1.5 dB

Attenuation @ 1.2 mA Control Current (900 MHz) 17.5 21.5 dB

VSWR All Ports 1.5 1.8

Input 3rd Order Intercept +37 +40 dBm

Relative Phase Shift Up to 20 dB Attenuation

1

7 10 Deg.

Group Delay 0.4 0.9 ns

Electrical Specifications at 25°C

Parameter

2

Condition Frequency Min. Typ. Max. Unit

Switching Characteristics

3

Rise, Fall (10/90% or 90/10% RF) 5 µs
On, Off (50% CTL to 90/10% RF) 8 µs
Video Feedthru (Peak) 5 mV

Maximum Input Power for <1 dB +15 dBm
Attenuation Variation

Operating Characteristics at 25°C (0, +5 V)

1. When built with external components as shown in the Pin Out diagram.

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

3. 0–4 mA square wave total control current.

SOIC-8

SOIC-8

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

Specifications subject to change without notice. 6/01A

HIP3™ Variable Attenuator 0.80–1.00 GHz AV111-12

VSWR

Input/Output VSWR vs. Current

Current (mA)

1.00

1.10

1.20

1.30

1.40

1.50

1.60

1.70

0.50 1.0 1.5 2.0 2.5 3.0

800 MHz

900 MHz

1 GHz

Attenuation (dB)

0 0.5 1.0 1.5 2.0

Attenuation vs. Current

-50

-40

-30

-20

-10

-45

-35

-25

-15

-5

0

Current (mA)

1000 MHz

900 MHz

800 MHz

Relative Phase Shift (Degrees)

Relative Phase vs. Frequency

0

4

8

12

16

20

24

Frequency (GHz)

0.80 0.84 0.88 0.92 0.96 1.00

0.5 mA
0 mA

1.0 mA

1.2 mA

1.4 mA

Attenuation (dB)

0.80 0.85 0.90 0.95 1.00

Attenuation vs. Frequency

-30

-25

-20

-15

-10

-5

0

Frequency (GHz)

0 mA

0.1 mA

0.5 mA

0.9 mA

1.2 mA

1.4 mA

Relative Phase vs. Attenuation

-25

-20

-15

-10

-5

0

5

10

15

20

25

Attenuation (dB)

Relative Phase Shift (Degrees)

-35 -30 -25 -20 -15 -10 -5 0

800 MHz

900 MHz

1000 MHz

Current (mA)

400 600 700 900500 800 1000

Typical PIN Diode Current vs. Voltage

0.01

0.1

1

100

10

Voltage (V)

Typical Performance Data