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

Figure 8, Typical Common Source Amplifier Gain vs Power Out

14

12

10

8

6

0

40

80

120

160

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

160

120

80

40

0

02

4

6

8

10

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

ARF449A/449B

5.5V

4.5V

5V

6V

VGS=8, 10 & 15V

1.0

10

RECTANGULAR PULSE DURATION (SECONDS)

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

0.8

0.1

0.05

0.01

0.005

0.001

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

Class C

V

DD

= 150V

f = 81.36 MHz

Table 1 - Typical Class C Large Signal Input-Output Impedance

Class C

V

DD

= 150V

f = 81.36 MHz

6.5V