Figure 5, Typical Threshold Voltage vs Temperature

Figure 6, Typical Output Characteristics

1.2

1.1

1.0

0.9

0.8

0.7

-50

-25

0

25

50

75

100 125 150

25

20

15

10

5

0

1

5

10

15

20

25

30

ARF460A/B

6.5V

5.5V

6V

7V

VGS=15 & 10V

9V

8V

4.5V

5V

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

Freq. (MHz)

Zin (Ω)

Z

2.0

13.5

27

40

65

20.9 - j 9.2

2.4 - j 6.8

.57 - j 2.6

.31 - j 0.5

.44 + j 1.9

38 - j 2.6

31 - j 14

19.6 - j 17.6

12.5 - j 15.8

6.0 - j 10.5

Zin - Gate shunted with 25Ω!!

Z

Conjugate of optimum load for 150 Watts output at Vdd = 125V

1.0

RECTANGULARPULSEDURATION(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

SINGLE PULSE

0.5

0.1

0.3

0.7

0.9

0.05

0.60

0.50

0.40

0.30

0.20

0.10

0

Figure 9a, TRANSIENT THERMAL IMPEDANCE MODEL

0.0284

0.165

0.307

0.00155F

0.00934F

0.128F

Power

(Watts)

Junction

temp. ( ”C)

RC MODEL

Case temperature