Parameters considered to be the
most important to system perfor-
mance are bounded by minimum
or maximum values. For the
Standard statistics tables or
Electronic devices may be sub-
jected to ESD damage in any of
the following areas:
Storage & handling
Inspection
calculations provide the probabil-
ity of a parameter falling between
any two values, usually symmetri-
MGA-71543, these parameters are: cally located about the mean.
Vref test, NFtest,Gatest,IIP3 test,and
ILtest. Each of the guaranteed
parameters is 100% tested as part
of the normal manufacturing and
test process.
Referring to Figure 15 for
Assembly & testing
In-circuit use
example, the probability of a
parameter being between 1σ is
68.3%; between 2σ is 95.4%; and
between 3σ is 99.7%.
The MGA-71543 is an ESD Class 1
device. Therefore, proper ESD
precautions are recommended
when handling, inspecting, testing,
assembling, and using these
devices to avoid damage.
Values for most of the parameters
in the table of Electrical Specifica-
tions that are described by typical
data are the mathematical mean
(µ), of the normal distribution
taken from the characterization
data. For parameters where
measurements or mathematical
averaging may not be practical,
such as S-parameters or Noise
parameters and the performance
curves, the data represents a
nominal part taken from the
center of the characterization
distribution. Typical values are
intended to be used as a basis for
electrical design.
Phase Reference Planes
The positions of the reference
plane used to specify S-parameters
and Noise Parameters for the
MGA-71543 are shown in
Figure 16. As seen in the illustra-
tion, the reference planes are
located at the point where the
package leads contact the test
circuit.
Any user-accessible points in
wireless equipment (e.g., antenna
or battery terminals) provide an
opportunity for ESD damage.
For circuit applications in which
the MGA-71543 is used as an input
or output stage with close cou-
pling to an external antenna, the
RFIC should be protected from
high voltage spikes due to human
contact with the antenna.
Reference Planes
Test Circuit
To assist designers in optimizing
not only the immediate amplifier
circuit using the MGA-71543, but
to also evaluate and optimize
tradeoffs that affect a complete
wireless system, the standard
deviation (σ) is provided for
many of the Electrical Specifica-
tion parameters (at 25°C). The
standard deviation is a measure of
the variability about the mean. It
will be recalled that a normal
distribution is completely de-
scribed by the mean and standard
deviation.
Figure 16. Phase Reference Planes.
Electrostatic Sensitivity
RFICs are electro-
static discharge (ESD)
sensitive devices.
Figure 17. In-circuit ESD Protection.
Although the MGA-71543 is robust
in design, permanent damage may
occur to these devices if they are
subjected to high-energy electro-
static discharges. Electrostatic
charges as high as several thou-
sand volts (which readily accumu-
late on the human body and on
test equipment) can discharge
without detection and may result
in failure or degradation in
performance and reliability.
A best practice, illustrated in
Figure17, is to place a shunt
inductor (RFC) at the antenna
connection to protect the receiver
and transmitter circuits. It is often
advantageous to integrate the
RFIC into a diplexer or T/R switch
control circuitry.
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