Alpha Industries, Inc. [781] 935-5150
· Fax [617] 824-4579 · Email sales@alphaind.com · www.alphaind.com
1
Specifications subject to change without notice. 12/99A
3740 GHz GaAs MMIC
Driver Amplifier
Features
I Single Bias Supply Operation (5 V)
I 13 dB Typical Small Signal Gain
I 14 dBm Typical P
1 dB
Output Power
at 38 GHz
I 0.25 µm Ti/Pd/Au Gates
I 100% On-Wafer RF and DC Testing
I 100% Visual Inspection to MIL-STD-883
MT 2010
Chip Outline
AA038P2-00
Description
Alpha's two-stage reactively-matched 3740 GHz GaAs
MMIC driver amplifier has typical small signal gain of
13 dB with a typical P
1 dB
of 14 dBm at 38 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.
Parameter
Condition
Symbol
Min.
Typ.
2
Max.
Unit
Drain Current
I
DS
75
100
mA
Small Signal Gain
F = 3740 GHz
G
11
13
dB
Input Return Loss
F = 3740 GHz
RL
I
-9
-6
dB
Output Return Loss
F = 3740 GHz
RL
O
-12
-10
dB
Output Power at 1 dB Gain Compression
F = 38 GHz
P
1 dB
13
14
dBm
Saturated Output Power
F = 38 GHz
P
SAT
15
16
dBm
Thermal Resistance
1
JC
199
°C/W
Electrical Specifications at 25°C (V
DS
= 5 V)
0.000
0.000
0.761
3.050
1.525
1.413
0.458
1.414
2.418
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 (T
C
)
-55°C to +90°C
Storage Temperature (T
ST
)
-65°C to +150°C
Bias Voltage (V
D
)
7 V
DC
Power In (P
IN
)
16 dBm
Junction Temperature (T
J
)
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.
3740 GHz GaAs MMIC Driver Amplifier
AA038P2-00
2
Alpha Industries, Inc. [781] 935-5150
· Fax [617] 824-4579 · Email sales@alphaind.com · www.alphaind.com
Specifications subject to change without notice. 12/99A
-40.0
-30.0
-20.0
-10.0
0.0
10.0
20.0
Frequency (GHz)
(dB)
36
37
38
39
41
42
40
Typical Small Signal Performance
S-Parameters (V
DS
= 5 V)
S
21
S
22
S
12
S
11
Typical Performance Data
5 V
RF IN
RF OUT
.01
µF
50 pF
Bias Arrangement
Detail A
RF IN
RF OUT
V
See
Detail A
Circuit Schematic
For biasing on, adjust V
DS
from zero to the desired value
(5 V recommended). For biasing off, reverse the biasing on procedure.
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