Alpha Industries, Inc. [781] 935-5150 •Fax [617] 824-4579 •Email sales@alphaind.com •www.alphaind.com 1
Specifications subject to change without notice. 8/00A
37–40 GHz GaAs MMIC
Low Noise Amplifier
Features
■Single Bias Supply Operation (5 V)
■3.5 dB Typical Noise Figure at 38 GHz
■13 dB Typical Small Signal Gain
■0.25 µm Ti/Pd/A u Gates
■100% On-Wafer RF, DC and Noise
Figure Testing
■100% Visual Inspection to MIL-STD-883
MT 2010
Chip Outline
AA038N3-00
Description
Alpha’s three-stage reactively-matched 37–40 GHz
MMIC low noise amplifier has typical small signal gain of
13 dB with a typical noise figure of 3.5 dB at 38 GHz.
The chip uses Alpha’ s prov en 0.25 µm lo w noise PHEMT
technology, and is based upon MBE la yers 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.
Parameter Condition Symbol Min. Typ.3Max. Unit
Drain Current VD= 5 V IDS 20 27 mA
Small Signal Gain F = 37–40 GHz G 10 13 dB
Noise Figure F = 38 GHz NF 3.5 3.8 dB
Input Return Loss F = 37–40 GHz RLI-12 -6 dB
Output Return Loss F = 37–40 GHz RLO-12 -6 dB
Output Power at 1 dB Gain Compression1F = 38 GHz P1 dB 6 dBm
Thermal Resistance2ΘJC 202 °C/W
Electrical Specifications at 25°C
0.000
0.085
1.283
1.525
1.610
0.000
1.310
1.225
0.655
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)6 V
DC
Power In (PIN) 10 dBm
Junction Temperature (TJ) 175°C
Absolute Maximum Ratings
1. Not measured on a 100% basis.
2. Calculated value based on measurement of discrete FET.
3.Typical represents the median parameter value across the specified
frequency range for the median chip.
37–40 GHz GaAs MMIC Low Noise Amplifier AA038N3-00
2Alpha Industries, Inc. [781] 935-5150 •Fax [617] 824-4579 •Email sales@alphaind.com •www.alphaind.com
Specifications subject to change without notice. 8/00A
Frequency (GHz)
Typical Small Signal Performance
S-Parameters (VDS = 5 V)
S-Parameters (dB)
-25
-20
-15
-10
-5
0
5
10
15
20
35 36 37 38 39 40 41 42 43
S11
S22
S12
S21
Typical Performance Data Bias Arrangement
D
Detail A
RF IN RF OUT
VD
Circuit Schematic
For biasing on, adjust VDS from zero to the desired value
(5 V recommended).For biasing off, reverse the biasing on procedure.
