MRF421 datasheet(2/4 Pages) MACOM

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

Characteristic

Symbol

Min

Typ

Max

Unit

ON CHARACTERISTICS

DC Current Gain

(IC = 5.0 Adc, VCE = 5.0 Vdc)

hFE

—

DYNAMIC CHARACTERISTICS

Output Capacitance

(VCB = 12.5 Vdc, IE = 0, f = 1.0 MHz)

Cob

—

550

800

FUNCTIONAL TESTS

Common–Emitter Amplifier Power Gain

(VCC = 12.5 Vdc, Pout = 100 W, IC(max) = 10 Adc,

ICQ = 150 mAdc, f = 30, 30.001 MHz)

GPE

—

Collector Efficiency

(VCC = 12.5 Vdc, Pout = 100 W, IC(max) = 10 Adc,

ICQ = 150 mA, f = 30, 30.001 MHz)

—

Intermodulation Distortion (1)

(VCE = 12.5 Vdc, Pout = 100 W, IC = 10 Adc,

ICQ = 150 mA, f = 30, 30.001 MHz)

IMD

—

–33

–30

NOTE:

1. To proposed EIA method of measurement. Reference peak envelope power.

Figure 1. 30 MHz Test Circuit Schematic

C1, C2, C4 — 170–780 pF, ARCO 469

C3 — 80–480 pF, ARCO 466

C5, C7, C10 — ERIE 0.1

µF, 100 V

C6 — MALLORY 500

µF @ 15 V Electrolytic

C9 — 100

µF, 15 V Electrolytic

C8 — 1000 pF, 350 V UNDERWOOD

R1 — 10

Ω, 25 Watt Wirewound

R2 — 10

Ω, 1.0 Watt Carbon

CR1 — 1N4997

L1 — 3 Turns, #16 Wire, 5/16

″ I.D., 5/16″ Long

L2 — 12 Turns, #16 Enameled Wire Closewound, 1/4

″ I.D.

L3 — 1–3/4 Turns, 1/8

″ Tubing, 3/8″ I.D., 3/8″ Long

L4 — 10

µH Molded Choke

L5 — 10 Ferrite Beads — FERROXCUBE #56–590–65/3B

BIAS

INPUT

OUTPUT

12.5 Vdc

CR1

C10

D.U.T.

REV 1

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