MRF5035 Datasheet, PDF (2/8 Pages) Motorola, Inc – N-CHANNEL BROADBAND RF POWER FET

ELECTRICAL CHARACTERISTICS — continued (TC = 25°C unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
ON CHARACTERISTICS
Gate Threshold Voltage
(VDS = 10 Vdc, ID = 25 mAdc)
VGS(th)
1.25
2.3
3.5
Vdc
Drain–Source On–Voltage
(VGS = 10 Vdc, ID = 3 Adc)
VDS(on)
—
—
0.422
Vdc
Forward Transconductance
(VDS = 10 Vdc, ID = 3 Adc )
gfs
3.2
—
—
S
DYNAMIC CHARACTERISTICS
Input Capacitance
(VDS = 12.5 Vdc, VGS = 0, f = 1 MHz)
Ciss
—
88
—
pF
Output Capacitance
(VDS = 12.5 Vdc, VGS = 0, f = 1 MHz)
Coss
—
197
—
pF
Reverse Transfer Capacitance
(VDS = 12.5 Vdc, VGS = 0, f = 1 MHz)
Crss
18
24
29
pF
FUNCTIONAL TESTS (In Motorola Test Fixture)
Common–Source Amplifier Power Gain
(VDD = 12.5 Vdc, Pout = 35 W,
IDQ = 400 mA)
Gps
f = 512 MHz
f = 175 MHz
Drain Efficiency
(VDD = 12.5 Vdc, Pout = 35 W,
IDQ = 400 mA)
η
f = 512 MHz
f = 175 MHz
Load Mismatch
ψ
(VDD = 15.5 Vdc, 2 dB Overdrive, f = 512 MHz,
Load VSWR = 20:1, All Phase Angles at Frequency of Test)
dB
6.5
7.5
—
—
12
—
%
50
55
—
—
55
—
No Degradation in Output Power
R1
VGG
R2
B1
+
C1
C2
C3 ^L1
Socket
N1
RF Input
Z1 ^C15 Z2
C4
R3
Z3 Z4
C5
C7
DUT ^C8
C6
C9
+
VDD
B2
C13
C14
R4
L2
Z7
C10
C12
Z8 C16
C11
Z9 ^N2
RF Output
Components List
B1, B2
Short Ferrite Bead, Fair Rite Products
C1, C14
10 µF, 50 V, Electrolytic
C2
1500 pF, Chip Capacitor
C3
140 pF, Chip Capacitor
C4, C11
0–10pF, Trimmer Capacitor
C5
30 pF, Chip Capacitor
C6, C7
43 pF, Chip Capacitor
C8, C9
36 pF, Chip Capacitor
C10
3.6 pF, Chip Capacitor
C12, C15, C16 120 pF, Chip Capacitor
C13
0.1 µF, Chip Capacitor
L1
5 Turns, 18 AWG, 0.116″ ID
L2
8 Turns, 20 AWG, 0.125″ ID
N1, N2
R1
R2
R3
R4
Z1, Z9
Z2
Z3
Z4
Z7
Z8
Board
Type N Flange Mount
1 kΩ, 1/4 W, Carbon
1 MΩ, 1/4 W, Carbon
100 Ω, 1/4 W, Carbon
110 Ω, 1/4 W, Carbon
Transmission Line*
Transmission Line*
Transmission Line*
Transmission Line*
Transmission Line*
Transmission Line*
Glass Teflon® 0.060″
*See Photomaster for Dimensions
Figure 1. 512 MHz Narrowband Test Circuit Electrical Schematic
MRF5035
2
MOTOROLA RF DEVICE DATA