MRF140 datasheet(4/8 Pages) MACOM

4 / 8 page

Figure 7. Series Equivalent Impedance

Figure 8. 150 MHz Test Circuit (Class AB)

C1, C2, C8 — Arco 463 or equivalent

C3 — 25 pF, Unelco

C4 — 0.1

µF, Ceramic

C5 — 1.0

µF, 15 WV Tantalum

C6 — 15 pF, Unelco J101

C7 — 25 pF, Unelco J101

C9 — Arco 262 or equivalent

C10 — 0.05

µF, Ceramic

C11 — 15

µF, 35 WV Electrolytic

L1 — 3/4

″, #18 AWG into Hairpin

L2 — Printed Line, 0.200

″ x 0.500″

L3 — 7/8

″, #16 AWG into Hairpin

L4 — 2 Turns, #16 AWG, 5/16 ID

RFC1 — 5.6

µH, Molded Choke

RFC2 — VK200–4B

R1, R2 — 150

Ω, 1.0 W Carbon

RF INPUT

DUT

+ 28 V

OUTPUT

BIAS

0-12 V

- C11

C10

RFC1

150

7.0

f = 2.0 MHz

150

f = 2.0 MHz

ZOL*

Zin

VDD = 28 V

IDQ = 250 mA

Pout = 150 W PEP

Zo = 10 Ohms

NOTE: Gate Shunted by 25 Ohms.

ZOL* = Conjugate of the optimum load impedance

ZOL* = into which the device output operates at a

ZOL* = given output power, voltage and frequency.

REV 9

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