MRF428 datasheet(2/5 Pages) MACOM

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ELECTRICAL CHARACTERISTICS — continued (TC = 25 °C unless otherwise noted.)

Characteristic

Symbol

Min

Typ

Max

Unit

FUNCTIONAL TESTS

Common-Emitter Amplifier Gain

(VCC = 50 Vdc, POUT = 150 W (PEP), IC(max) = 3.32 Adc,

f = 30 MHz)

GPE

—

Output Power

(VCE = 50 Vdc, f = 30 MHz)

POUT

150

—

W (PEP)

Collector Efficiency

(VCC = 50 Vdc, POUT = 150 W (PEP), IC(max) = 3.32 Adc,

f = 30 MHz)

—

Intermodulation Distortion (1)

(VCE = 50 Vdc, POUT = 150 W (PEP), IC = 3.32 Adc)

IMD

—

-33

-30

Electrical Ruggedness

(VCC = 50 Vdc, POUT = 150 W (PEP), IC(max) = 3.32 Adc,

VSWR 30:1 at all Phase Angles)

No Degradation in Output Power

ON CHARACTERISTICS

DC Current Gain

(IC = 5.0 Adc, VCE = 5.0 Vdc)

hFE

—

DYNAMIC CHARACTERISTICS

Output Capacitance

(VCB = 50 Vdc, IE = 0, f = 1.0 MHz)

COB

—

220

250

NOTE:

1. To Mil-Std-1311 Version A, Test Method 2204B, Two Tone, Reference each Tone.

R2 — 10

Ω, 1.0 Watt

CR1 — 1N4997

L1 — 3 Turns, #16 Wire, 5/16” I.D., 5/16” Long

L2 — 10

µH Molded Choke

L3 — 12 Turns, #16 Enameled Wire Closewound, 1/4” I.D.

L4 — 5 Turns, 1/8” Copper Tubing, 9/16” I.D., 3/4” Long

L5 — 10 Ferrite Beads — Ferroxcube #56-590-65/3B

C1,C2,C7 — 170-780 pF, Arco 469

C3,C8,C9 — 0.1

µF, 100 V Erie

C4 — 500

µF @ 6.0 V

C5 — 9.0-180 pF, Arco 463

C6 — 80-480 pF, Arco 466

C10 — 30

µF, 100 V

R1 — 10

Ω, 10 Watt

Figure 1. 30 MHz Test Circuit Schematic

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