SPF-3143 데이터 시트보기 (PDF) - Sirenza Microdevices => RFMD
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SPF-3143 Datasheet PDF : 3 Pages
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Junction Temperature Calculation
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:
PDC < (TJ - TL) / RTH
where:
PDC = IDS * VDS (W)
TJ = Junction Temperature (C)
TL = Lead Temperature (pin 2) (C)
RTH = Thermal Resistance (C/W)
Biasing Details
The SPF-3143 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.
Preliminary
SPF-3143 Low Noise pHEMT GaAs FET
Absolute Maximum Ratings
Parameter
Symbol Value
Unit
Drain Current
IDS
180
mA
Forward Gate Current
IGSF
600
uA
Reverse Gate Current
IGSR
600
uA
Drain-to-Source Voltage
VDS
7
V
Gate-to-Source Voltage
VGS
<-3 OR >0
V
RF Input Power
PIN
15
dBm
Storage Temperature Range
Tstor -40 to + 150
C
Power Dissipation
PDISS
325
mW
Junction Temperature
TJ
150
C
Operation of this device beyond any one of these limits may cause
permanent damage. For reliable continuous operation, the device voltage
and current must not exceed the maximum operating values specified in the
table on page 1.
Peak RF Performance Under Optimum Matching Conditions
Freq
VDS
IDQ
NFMIN [4]
Gmax
P1dB [5] OIP3 [6]
(GHz)
(V) (mA)
(dB)
(dB)
(dBm) (dBm)
3
20
0.25
21.5
15
29
0.90
5
40
0.36
23.3
18
31
3
20
0.50
18.3
15
29
1.90
5
40
0.58
19.1
18
31
[4] ZS=ΓOPT, ZL=ZL*, The input matching circuit losses have been de-emebedded.
[5] ZS=ZSOPT, ZL=ZLOPT, where ZSOPT and ZLOPT have been tuned for max P1dB
[6] ZS=ZSOPT, ZL=ZLOPT, where ZSOPT and ZLOPT have been tuned for max OIP3
Note: Optimum NF, P1dB, and OIP3 performance cannot be achieved simultaneously.
G
ZSOPT
D
Z LOPT
S
Typical Performance - Noise Parameters
Freq
VDS
(GHz)
(V)
3
0.90
5
3
1.90
5
IDS
(mA)
20
40
20
40
NFMIN [7]
(dB)
0.25
0.36
0.50
0.58
ΓOPT
Mag ∠ Ang
0.70 ∠ 12.1
0.66 ∠ 12.6
0.46 ∠ 26.4
0.38 ∠ 28.1
rN
0.14
0.14
0.13
0.13
Gmax
(dB)
21.5
23.3
18.3
19.1
[7] ZS=ΓOPT, ZL=ZL*, NFMIN is a noise parameter for which the input matching circuit losses have been de-emebedded. The noise
parameters were measured using a Maury Microwave Automated Tuner System. The device was mounted on a 0.010” PCB with plated-
thru holes close to pins 2 and 4.
303 Technology Court, Broomfield, CO 80021
Phone: (800) SMI-MMIC
2
http://www.sirenza.com
EDS-103162 Rev B
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