Figure 8, Typical Common Source Amplifier Gain vs Power Out

14

12

10

8

6

0

150

300

450

600

Figure 5, Typical Threshold Voltage vs Temperature

1.2

1.1

1.0

0.9

0.8

0.7

0.6

-50 -25

0

25

50

75 100 125 150

600

450

300

150

0

0

6

12

18

24

30

25

20

15

10

5

0

1

5

10

15

20

25

30

Figure 7, Typical Power Out vs Power In

Figure 6, Typical Output Characteristics

ARF450

5.5V

4.5V

5V

6V

VGS=8, 10 & 15V

V

V

f = 81.36 MHz

Push-Pull

V

V

f = 81.36 MHz

Push-Pull

6.5V

Freq. (MHz)

Z

Z

2.0

13.5

27.0

40.0

65.0

80.0

100.0

93.0 - j 10

63.0 - j 43

32.0 - j 43

17.5 - j 34

7.7 - j 22

5.1 - j 16

3.4 - j 12

23.00 - j 7.0

4.30 - j 9.1

1.00 - j 4.2

0.42 - j 1.7

Table 1 - Typical Class C Large Signal Input-Output Impedance (per section)

1.0

10

RECTANGULAR PULSE DURATION (SECONDS)

Figure 9, Typical Maximum Effective Transient Thermal Impedance, Junction-To-Case vs Pulse Duration

Note:

Duty Factor D =

t1/t

2

Peak TJ = PDM x ZθJC + TC

t1

t2

0.1

SINGLE PULSE

0.02

0.05

0.2

D=0.5

0.01

0.6

0.1

.01

.005

.001

.05