SPF-3043 Sirenza, SPF-3043 Datasheet - Page 2

• Manufacturer Part Number: SPF-3043
• Description: Low Noise Phemt GAAS Fet
• Manufacturer: Sirenza

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The SPF-3043 is a depletion mode FET and requires a
negative gate voltage to achieve pinchoff. As such, power
supply sequencing circuitry is strongly recommended to
prevent damaging bias transients during turn-on. Active
bias circuitry is also recommended to maintain a constant
drain current from part-to-part.
[3]
Refer to the application note for additional RF data, PCB layouts, BOMs, biasing instructions, and other key
issues to be considered. For the latest application note please visit our site at www.sirenza.com.
Peak RF Performance Under Optimum Matching Conditions
[4]
[5]
[6]
Note: Optimum NF, P1dB, and OIP3 performance cannot be achieved simultaneously.
522 Almanor Ave., Sunnyvale, CA 94085
MTTF is inversely proportional to the device junction
temperature. For junction temperature and MTTF consid-
erations the device operating conditions should also
satisfy the following expression:
where:
Typical Performance - Engineering Application Circuits (See App Note AN-043)
(
P
F
G
Z
0
0
2
2
5
Z
Z
1
1
(
F
G
OUT
0
1
S
S
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9 .
9 .
1 .
4 .
5 .
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9 .
9 .
H
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4
5
0
q
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0
0
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0
q
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0
OPT
SOPT
SOPT
Junction Temperature Calculation
, Z
, Z
, Z
P
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T
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R
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(
L
J
L
DC
DC
TH
V
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5
5
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5
5
L
D
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= Lead Temperature (pin 2) (C)
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V
S
)
(
= I
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L
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3
5
3
5
D
*, The input matching circuit losses have been de-emebedded.
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DS
(
m
J
I
4
4
4
4
4
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8
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, where Z
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D
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Biasing Details
0
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N
and Z
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LOPT
n i
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3 .
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9 .
5 .
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[
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)
have been tuned for max P1dB
have been tuned for max OIP3
d (
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5 .
4 .
3 .
a
x
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Phone: (800) SMI-MMIC
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