Characteristic

Symbol

Min

Typ

Max

Unit

OFF CHARACTERISTICS

Drain–Source Breakdown Voltage (VGS = 0, ID = 50 mA)

V(BR)DSS

65

—

—

Vdc

Zero Gate Voltage Drain Current (VDS = 28 V, VGS = 0)

IDSS

—

—

10

mAdc

Gate–Source Leakage Current (VGS = 20 V, VDS = 0)

IGSS

—

—

1.0

µAdc

ON CHARACTERISTICS

Gate Threshold Voltage (VDS = 10 V, ID = 100 mA)

VGS(th)

1.0

3.0

6.0

Vdc

Forward Transconductance (VDS = 10 V, ID = 3.0 A)

gfs

1.75

2.5

—

mhos

DYNAMIC CHARACTERISTICS

Input Capacitance (VDS = 28 V, VGS = 0, f = 1.0 MHz)

Ciss

—

175

—

pF

Output Capacitance (VDS = 28 V, VGS = 0, f = 1.0 MHz)

Coss

—

190

—

pF

Reverse Transfer Capacitance (VDS = 28 V, VGS = 0, f = 1.0 MHz)

Crss

—

40

—

pF

FUNCTIONAL CHARACTERISTICS (Figure 1)

Noise Figure

(VDD = 28 Vdc, ID = 2.0 A, f = 150 MHz)

NF

—

3.0

—

dB

Common Source Power Gain

(VDD = 28 Vdc, Pout = 125 W, f = 150 MHz, IDQ = 100 mA)

Gps

9.0

11.8

—

dB

Drain Efficiency

(VDD = 28 Vdc, Pout = 125 W, f = 150 MHz, IDQ = 100 mA)

η

50

60

—

%

Electrical Ruggedness

(VDD = 28 Vdc, Pout = 125 W, f = 150 MHz, IDQ = 100 mA,

VSWR 30:1 at all Phase Angles)

ψ

No Degradation in Output Power

Figure 1. 150 MHz Test Circuit

C1 — 15 pF Unelco

C2 — Arco 462, 5.0 – 80 pF

C3 — 100 pF Unelco

C4 — 25 pF Unelco

C6 — 40 pF Unelco

C7 — Arco 461, 2.7 – 30 pF

C5, C8 — Arco 463, 9.0 – 180 pF

C9, C11, C14 — 0.1

µF Erie Redcap

C10 — 50

µF, 50 V

C12, C13 — 680 pF Feedthru

D1 — 1N5925A Motorola Zener

L1 — #16 AWG, 1–1/4 Turns, 0.213

″ ID

L2 — #16 AWG, Hairpin

0.25

″

0.062

″

L3 — #14 AWG, Hairpin

0.47

″

0.2

″

L4 — 10 Turns #16 AWG Enameled Wire on R1

RFC1 — 18 Turns #16 AWG Enameled Wire, 0.3

″ ID

R1 — 10

Ω, 2.0 W

R2 — 1.8 k

Ω, 1/2 W

R3 — 10 k

Ω, 10 Turn Bourns

R4 — 10 k

Ω, 1/4 W

BIAS

ADJUST

+

–

RF OUTPUT

RF INPUT

VDD = 28 V

+

–

C9

C10 D1

R3

R2

C11

C12

L4

R1

C13

C14

RFC1

R4

DUT

C1

C2

C3

L1

L2

C4

C5

L3

C6

C7

C8

2

REV 7