Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • 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.
