MAAM12022 MA-COM [M/A-COM Technology Solutions, Inc.], MAAM12022 Datasheet - Page 6

• Manufacturer Part Number: MAAM12022
• Description: GaAs MMIC Low Noise Amplifier SOIC-8 Platform
• Manufacturer: MA-COM [M/A-COM Technology Solutions, Inc.]

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changes to the product(s) or information contained herein without notice.
GaAs MMIC Low Noise Amplifier SOIC-8 Platform
Application Note
M540
MAAM12022 over the 1.2 - 1.6 GHz
Frequency Range
Both the MAAM12021 and MAAM12022 can be tuned to
cover the 1.2 - 1.6 GHz frequency range with the addition
of some external matching networks. The matching net-
works to accomplish this for both LNAs are shown sche-
matically in Figure 13. Distributed matching is shown,
although an equivalent lumped element approach would
also suffice. The gain performance of the MAAM12022
when matched using the distributed topology of Figure
13 is shown in Figure 14; the nose figure performance is
shown in Figure 15. For this LNA, the external matching
has even improved the noise figure in the original fre-
quency range, but at the expense of input match in that
range.
External matching networks can be used to extend the
frequency range of all the LNAs in this product platform.
In fact, the AM50-0002 has been designed to require an
external matching network to achieve a good match and
minimum noise figure performance at the intended fre-
quency.
MAAM12022, it may be possible to improve the noise
figure of the LNA at the expense of input match. It is
also possible to combine external tuning with the bias
options described in the previous subsection to create
additional performance possibilities with these LNAs.
AM50-0001 as A Transmit Driver
Amplifier
The AM50-0001 was originally designed for the cellular
industry as a high dynamic range, base station receive
amplifier with a noise figure of 1.5 dB and output IP3 of
+30 dBm. However, if V
the same current drain of 50 mA, the AM50-0001 can put
out more than +20 dBm of power as shown in the output
power versus input power curve of Figure 16.
In some instances, as shown above for the
DD
(pin 7) is set to 8 volts with
Performance Data & Recommended
Board Layouts
To facilitate ease of evaluation by the customer for either
alternative matching networks or to simulate system per-
formance directly, de-embedded S-parameter and noise
parameter data is available for all members of the GaAs
MMIC LNA family discussed in this application note.
These data files are in DOS ASCII Touchstone® format.
Please note that not all biases of each device are avail-
able; please consult the factory. Additional performance
data, which is discussed in the product applications sec-
tions, is also available.
Another avenue for evaluating these MMIC LNAs is by
mounting the SOIC-8 to an FR4 board. A typical sample
board layout is shown in Figure 17. This sample board
accommodates the AM50-0002 and includes the recom-
mended external input matching network for 1.575 GHz
operation. A similar sample board layout accommodates
the other six LNAs in this product platform. The .dxf files
for these layouts are available from the factory. Addition-
ally, these sample boards, as well as LNA samples, can
be ordered from the factory.
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Rev. V3