MRF455 datasheet(2/3 Pages) MACOM

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

Characteristic

Unit

Max

Typ

Min

Symbol

FUNCTIONAL TESTS (Figure 1)

Common–Emitter Amplifier Power Gain

(VCC = 12.5 Vdc, Pout = 60 W, f = 30 MHz)

Gpe

—

Collector Efficiency

(VCC = 12.5 Vdc, Pout = 60 W, f = 30 MHz)

—

Series Equivalent Input Impedance

(VCC = 12.5 Vdc, Pout = 60 W, f = 30 MHz)

Zin

—

1.66–j.844

—

Ohms

Series Equivalent Output Impedance

(VCC = 12.5 Vdc, Pout = 60 W, f = 30 MHz)

Zout

—

1.73–j.188

—

Ohms

Parallel Equivalent Input Impedance

(VCC = 12.5 Vdc, Pout = 60 W, f = 30 MHz)

Zin

—

2.09/1030

—

Ω/pF

Parallel Equivalent Output Impedance

(VCC = 12.5 Vdc, Pout = 60 W, f = 30 MHz)

Zout

—

1.75/330

—

Ω/pF

Figure 1. 30 MHz Test Circuit Schematic

f = 30 MHz

Pin, INPUT POWER (WATTS)

234

VCC, SUPPLY VOLTAGE (VOLTS)

0.5

1.5

2.5

3.5

4.5

VCC = 13.6 V

f = 30 MHz

12.5 V

Pin = 3.5 V

1 W

1.75 W

121416

911

RF OUTPUT

DUT

12.5 Vdc

RF INPUT

C1, C2, C4 — ARCO 469

C3 — ARCO 466

C5 — 1000 pF, UNELCO

C6, C7 — 0.1

µF Disc Ceramic

C8 — 1000

µF/15 V Electrolytic

R1 — 10 Ohm/1.0 Watt, Carbon

L1 — 3 Turns, #18 AWG, 5/16

″ I.D., 5/16″ Long

L2 — VK200–20/4B, FERROXCUBE

L3 — 12 Turns, #18 AWG Enameled Wire, 1/4

″ I.D., Close Wound

L4 — 3 Turns 1/8

″ O.D. Copper Tubing, 3/8″ I.D., 3/4″ Long

L5 — 7 FERRITE Beads, FERROXCUBE #56–590–65/3B

Figure 2. Output Power versus Input Power

Figure 3. Output Power versus Supply Voltage

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