
PRELIMINARY
FMA411
L
OW
-N
OISE
X-BAND
MMIC
Phone:
+1 408 850-5790
Fax: +1 408 850-5766
www.filcs.com
Revised:
7/19/04
Email:
sales@filcsi.com
PERFORMANCE
8.5 – 14.0 GHz Operating Bandwidth
2.6 dB Noise Figure
18 dB Small-Signal Gain
17.5 dm Output Power
+6V Single Bias Supply
Adjustable Operating Current
DC De-coupled Input and Output Ports
DESCRIPTION AND APPLICATIONS
The FMA411 is a 2-stage, reactively matched pHEMT low-noise MMIC amplifier designed for use
over the 8.5 to 14.0 GHz bandwidth. The amplifier requires a single +6V supply and one off-chip
component for supply de-coupling; the supply voltage can be varied from +3V to +6V if needed.
Both the input and output ports are DC de-coupled. Grounding of the amplifier is provided by plated
thru-vias to the bottom of the die, no additional ground is required. Operating current can be
adjusted using the Source resistor ladders located along the bottom edge, by bonding a particular pad
to ground, in order to optimize noise or power performance.
Typical applications include low-noise front end amplifiers, and general gain block utilizations in X-
band. The amplifier is unconditionally stable over all load states (-45 to +85
°
C), and conditionally
stable if the input port is open-circuited.
ELECTRICAL SPECIFICATIONS AT 22°C
Parameter
Symbol
BW
S
21
I
DSS
Test Conditions
Min
8.5
16.5
210
Typ
18
230
Max
14
21
270
Units
GHz
dB
mA
Operating Frequency Bandwidth
Small Signal Gain
Saturated Drain Current
(see Note)
Operating Current
Small Signal Gain Flatness
V
DD
= +6 V I
DD
≈
60% I
DSS
V
DD
= +3V
I
DQ
S
21
NF
IMD
V
DD
= +6V
125
140
±
0.8
2.6
-46
17.5
-10
-16
-40
165
±
1.2
3.5
mA
dB
V
DD
= +6 V I
DD
≈
60% I
DSS
V
DD
= +6 V I
DD
≈
60% I
DSS
V
DD
= +6 V I
DD
≈
60% I
DSS
P
OUT
= +6 dBm SCL
V
DD
= +6 V I
DD
≈
60% I
DSS
V
DD
= +6 V I
DD
≈
60% I
DSS
V
DD
= +6 V I
DD
≈
60% I
DSS
V
DD
= +6 V I
DD
≈
60% I
DSS
Noise Figure
dB
dBc
dBm
dB
dB
dB
3
rd
-Order Intermodulation Distortion
Power at 1dB Compression
Input Return Loss
Output Return Loss
Reverse Isolation
P
1dB
S
11
S
22
S
12
16
-6
-10
-35
NOTE:
Continuous operation at I
DSS
is not recommended