ALPHA AA028P3-00 Datasheet

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

Specifications subject to change without notice. 12/99A

27–31 GHz GaAs MMIC
Driver Amplifier

Features

■ Single Bias Supply Operation (6 V)

■ 19 dB Typical Small Signal Gain

■ 16 dBm Typical P

1 dB

Output Power

at 28 GHz

■ 0.25 µm Ti/Pd/Au Gates

■ 100% On-Wafer RF and DC Testing

■ 100% Visual Inspection to MIL-STD-883

MT 2010

Chip Outline

AA028P3-00

Description

Alpha’s three-stage reactively-matched 27–31 GHz
GaAs MMIC driver amplifier has typical small signal gain
of 19 dB with a typical P

1 dB

of 16 dBm at 28 GHz. The
chip uses Alpha’s proven 0.25 µm MESFET technology,
and is based upon MBE layers and electron beam
lithography for the highest uniformity and repeatability.
The FETs employ surface passivation to ensure a
rugged, reliable part with through-substrate via holes and
gold-based backside metallization to facilitate a
conductive epoxy die attach process. All chips are
screened for gain, output power and S-parameters prior
to shipment for guaranteed performance. Designed for
27–31 GHz LMDS and digital radio bands.

Parameter Condition Symbol Min. Typ.

2

Max. Unit

Drain Current I

DS

145 200 mA

Small Signal Gain F = 27–31 GHz G 17 19 dB

Input Return Loss F = 27–31 GHz RL

I

-10 -6 dB

Output Return Loss F = 27–31 GHz RL

O

-10 -6 dB

Output Power at 1 dB Gain Compression F = 28 GHz P

1 dB

14 16 dBm

Saturated Output Power F = 28 GHz P

SAT

15 18 dBm

Thermal Resistance

1

Θ

JC

101 °C/W

Electrical Specifications at 25°C (VDS= 6 V)

0.000

0.000

0.763

1.525

3.050

0.380

1.243

2.106

1.415

Dimensions indicated in mm.
All DC (V) pads are 0.1 x 0.1 mm and RF In, Out pads are 0.07 mm wide.
Chip thickness = 0.1 mm.

Characteristic Value

Operating Temperature (TC) -55°C to +90°C

Storage Temperature (TST) -65°C to +150°C

Bias Voltage (VD)7 V

DC

Power In (PIN) 16 dBm

Junction Temperature (TJ) 175°C

Absolute Maximum Ratings

1. Calculated value based on measurement of discrete FET.

2. Typical represents the median parameter value across the specified

frequency range for the median chip.

27–31 GHz GaAs MMIC Driver Amplifier AA028P3-00

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

Specifications subject to change without notice. 12/99A

-50

-40

-30

-20

-10

0

10

20

30

26 28 30 32

S

11

S

12

S

21

S

22

Frequency (GHz)

(dB)

Typical Small Signal Performance

S-Parameters (VDS = 6 V)

Typical Performance Data

6 V

RF IN RF OUT

.01 µF 50 pF

Bias Arrangement

Detail A

RF IN RF OUT

V

DS

SEE

DETAIL A

Circuit Schematic

For biasing on, adjust VDSfrom zero to the desired value
(6 V recommended). For biasing off, reverse the biasing on procedure.