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ec== :--=s= == = -r--= .-- = =z r =
RF MOSFET 2 - 175 MHz
Features
l l l l l
Power
Transistor,
5W, 28V
DU2805S
v2.00
N-Channel Enhancement Mode Device DMOS Structure Lower Capacitances for Broadband Operation High Saturated Output Power Lower Koise Figure Than Bipolar Devices
Absolute Maximum Ratings at 25C
Parameter Symbol Rating 65 20 I Units
Drain-SourceVoltage Gate-Source Voltage Drain-Source Current Power Dissipation JunctionTemperature ( Storage Temperature Thermal Resistance I I
VOS V0s `05 PO T, TSTG 0JC I
V
v
1.4
15.8 200
I
* W
"C
I
1 -55to+150 11.1
I
"C "C/w
I
Electrical Characteristics
at 25C
Specifications
Subject to Change Without Notlce.
M/A-COM,
North America: Tel. (800) 366-2266 Fax (800) 618-8883 m Asia/Pacific: Tel. +81 (03) 3226-1671 Fax +81 (03) 3226-1451
l
Inc.
Europe:
Tel. +44 (1344) 869 595 Fax +44 (1344) 300 020
RF MOSFET Power Transistor,
5W, 28V
DU2805S
v2.00
Typical Broadband Performance
Curves
CAPACITANCES
vs VOLTAGE
25
GAIN vs FREQUENCY
V,,=28 V I,,=50 mA P,,&O W
F=l .O MHz
10 60 100 FREQUENCY (MHz) 150
200
v,, w
POWER OUTPUT
V,,=28
6
vs POWER INPUT
mA
POWER OUTPUT
V,,=28 V IDo=
vs VOLTAGE
V I,,=50
mA F=175 MHz P,,=315 mW
5 z t4 2 $3
1
/
0 0.01
0.02 0.04
0.1 0.2 POWER INPUT(W)
0.3
0.4
0.45
2.5
5
10
15
v,, (V)
20
25
30
35
- Continued
Specifications Subject to Change Wiiout Notice.
next page -
M/A-COM,
Inc. Tel. (800) 366-2266 Fax (800) 618-8883 = Asia/Pacific: Tel. +81 (03) 3226-1671 Fax +81 (03) 3226-1451
n
North America:
Europe:
Tel. +44 (1344) 869 595 Fax +44 (1344) 300 020
RF MOSFET Power Transistor,
5W, 28V
DU2805S
v2.00
Typical Device Impedance
Frequency
100
(MHz)
Z,, (OHMS) 15.0 - j 121.0 I 1 39.0 - j 77.0 41 .O - j 38.0 34.0 - j 14.0 V,,=28 V, I,,=50 mA, POUT=5Watts
1 ( 1 1
Z,,,,
(OHMS) 1
57.0 + j 23.0 55.0 + i 23.0 56.0+ j 19.0 56.0 + j 20.0
200
Z,, is the series equivalent
input impedance
of the device from gate to gate. as measured from drain to ground.
is Z LOAD the optimum series equivalent
load impedance
RF Test Fixture
-IL
L T
VDS J4
0
PARTS LIST Cl c2 c3 wc5 C6,CB c7 c9 Cl0 Ll I2 L3 TRIMMER CAPACITOR 5-8OpF TRIMMER CAPACITOR 7-1OOpF CAPACITOR 15pF TRIMMER CAPACfTOR 918OpF CAPACITOR 1OOOpF CAPACITOR 5OOpF FEEDTHROUGH CAPACITOR 1OOOpF ELECTROLYTIC CAPACITOR 25uF 50 VOLTS
2 TURNS OF NO. 12 AWG ON `0.25 8 TURNS OF NO. 12 AWG ON `0.25 1 TURN OF NO. 12 AWG W/ SIEMENS DOUBLE APERTURE CORE B62152-AOOOl-X001
Ql BOARD
DU2805S FR4 0.062"
Specifications Subject to Change Without Notice.
M/A-COM,
North America: Tel. (800) 366-2266 Fax (800) 618-8883
n
Inc.
Asia/Pacific:
Tel. +81 (03) 3226-1671 Fax +81 (03) 3226-1451
Europe:
Tel. +44 (1344) 869 595 Fax +44 (1344) 300 020

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