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Alpha Industries, Inc. [781] 935-5150 Fax [617] 824-4579 Email sales@alphaind.com www.alphaind.com 1Specifications 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)3 For Two-tone Input Power +0 dBm 0.9 GHz 15 dBm

Control Voltage (VC) 0.0 VS V

Supply Voltage (VS) 5.0 V

Control Current (IC) 800 A

Supply Current (IS) 800 A

GaAs IC 35 dB Voltage Variable AttenuatorSingle Positive Control 0.52.5 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) BSCPIN 8

PIN 1

INDICATOR

DescriptionThe AV105-12 GaAs IC FET voltage variable attenuatorprovides 35 dB attenuation range at 900 MHz controlled

by a single positive voltage. The VVA has a linear transfercurve of 8 dB/V slope, with input and output VSWR betterthan 1.4:1 over all states. Its attenuation range at 1900

MHz is 31 dB. It operates with supply voltage of +5 V andcontrol voltage of 0 V to +5 V in a low cost SOIC-8

package. The RF ports require 25 pF DC blockingcapacitors.

Parameter1 Frequency Min. Typ. Max. Unit

Insertion Loss (VC = 5 V) 0.51.0 GHz 2.8 3.1 dB

1.02.0 GHz 3.2 3.6 dB

2.02.5 GHz 3.5 3.8 dB

Maximum Attenuation (VC = 0 V)2 0.50.8 GHz 25 33 dB

0.81.0 GHz 35 38 dB

1.01.7 GHz 32 35 dB1.72.0 GHz 28 31 dB

2.02.5 GHz 26 30 dB

VSWR (I/O)3 0.52.5 GHz 1.8:1

Electrical Specifications at 25C (VS = 5 V)

Operating Characteristics at 25C (VS = 5 V)

1. All measurements made in a 50 system, unless otherwise specified.2. Maximum attenuation includes insertion loss.3. For worst case state.

Preliminary

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GaAs IC 35 dB Voltage Variable Attenuator Single Positive Control 0.52.5 GHz AV105-12

2 Alpha Industries, Inc. [781] 935-5150 Fax [617] 824-4579 Email sales@alphaind.com www.alphaind.comSpecifications subject to change without notice. 3/99A

0

-1

-2

-3

-4

2.52.0

Frequency (GHz)

Insertion Loss vs. Frequency

InsertionLoss(dB)

-50.5 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

MaximumAttenuatio

n(dB)

0.5 1.0 1.5-45

-40

-35

-30

-25

-20

-15

-10

-5

0

Typical Performance Data @ 0.9 GHz(Unless Otherwi se Specifi ed)

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

1510

20

4 53

VC(V)

Input IP3 vs. Control Voltage

IIP3(dBm)

00 1 2

35

25

5

4.0 5.03.0

VC(V)

Attenuation vs. Control VoltageOver Temperature

Attenuation(dB)

0 1.0 2.0-3.0

-2.0

-1.0

0

1.0

2.0

3.0Attenuation Normalized to 25C

85C

-20C

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GaAs IC 35 dB Voltage Variable Attenuator Single Positive Control 0.52.5 GHz AV105-12

Alpha Industries, Inc. [781] 935-5150 Fax [617] 824-4579 Email sales@alphaind.com www.alphaind.com 3Specifications subject to change without notice. 3/99A

1

2

3

4

8

7

6

5

GND

GND

GND

VS

J1

VC

J2

GND

CBL

CBL

Characteristic Value

RF Input Power 50 mW > 500 MHz

Supply Voltage +4 to +8 V

Control Voltage -0.2 V < VC < VS +0.2 V

Operating Temperature -40C to +85C

Storage Temperature -65C to +150C

JC 25C/W

Absolute M aximum Ratings Pin Out

DC blocking capacitors (CBL) supplied externally.CBL = 25 pF for operation >500 MHz.

Note: Exceeding these parameters may cause irreversible damage.