MRF173CQ Datasheet, PDF (2/6 Pages) Tyco Electronics – N-CHANNEL BROADBAND RF POWER MOSFET

ELECTRICAL CHARACTERISTICS — continued (T_C = 25°C unless otherwise noted)
Characteristic
Symbol
Min
Typ
Max
Unit
DYNAMIC CHARACTERISTICS
Input Capacitance (V_DS = 28 V, V_GS = 0 V, f = 1.0 MHz)
C_iss
—
110
—
pF
Output Capacitance (V_DS = 28 V, V_GS = 0 V, f = 1.0 MHz)
C_oss
—
105
—
pF
Reverse Transfer Capacitance (V_DS = 28 V, V_GS = 0 V, f = 1.0 MHz)
C_rss
—
10
—
pF
FUNCTIONAL CHARACTERISTICS
Noise Figure (V_DD = 28 V, f = 150 MHz, I_DQ = 50 mA)
NF
Common Source Power Gain
G_ps
(V_DD = 28 V, P_out = 80 W, f = 150 MHz, I_DQ = 50 mA)
Drain Efficiency (V_DD = 28 V, P_out = 80 W, f = 150 MHz, I_DQ = 50 mA)
η
Electrical Ruggedness
ψ
(V_DD = 28 V, P_out = 80 W, f = 150 MHz, I_DQ = 50 mA)
Load VSWR 30:1 at all phase angles
—
1.5
—
dB
11
13
—
dB
55
60
—
%
No Degradation in Output Power
Series Equivalent Input Impedance
(V_DD = 28 V, P_out = 80 W, f = 150 MHz, I_DQ = 50 mA)
Series Equivalent Output Impedance
(V_DD = 28 V, P_out = 80 W, f = 150 MHz, I_DQ = 50 mA)
Z_in
—
1.35–j5.15
—
Ohms
Z_out
—
2.72–j149
—
Ohms
+
R1
C8
C9
-
R2
Z1
RF
INPUT _C1
L1
C2
C16
R3
L2
C3
C10
RFC2
D.U.T.
RFC1
C11
L3
C4
C12
+
C13
-
V_DD = 28 V ₊
V_dc
C14
-
RF
L4
OUTPUT
C5
C15 _C6
C7
C1, C15 — 470 pF Unelco
C2, C3, C5 — 9–180 pF, Arco 463
C4, C6 — 15 pF, Unelco
C7 — 5–80 pF, Arco 462
C8, C10, C14, C16 — 0.1 µF
C9, C13 — 50 µF, 50 Vdc
C11, C12 — 680 pF, Feed Through
L1 — #16 AWG, 1–1/4 Turns, 0.3″ ID
L2 — #16 AWG Hairpin 1″ long
L3 — #14 AWG Hairpin 0.8″ long
L4 — #14 AWG Hairpin 1.1″ long
RFC1 — Ferroxcube VK200–19/4B
RFC2 — 18 Turns #18 AWG Enameled, 0.3″ ID
R1 — 10 kΩ, 10 Turns Bourns
R2 — 1.8 kΩ, 1/4 W
R3 — 10 kΩ, 1/2 W
Z1 — 1N5925A Motorola Zener
Figure 1. 150 MHz Test Circuit
REV 0
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