3

MRF644

MOTOROLA RF DEVICE DATA

Figure 2. Power Output versus Power Input

Figure 3. Power Output versus Frequency

Figure 4. Power Output versus Supply Voltage

Figure 5. Power Saturation Profile

Figure 6. Series Equivalent Input–Output Impedance

VCC, SUPPLY VOLTAGE (VOLTS)

40

4

10

30

20

0

6

8

10

12

14

16

18

20

Pin, POWER INPUT (WATTS)

40

1

10

30

20

0

2

3

4

5

6

7

8

9

f, FREQUENCY (MHz)

460

480

500

520

440

40

10

30

20

0

Pin, POWER INPUT (WATTS)

2

1

40

10

30

20

0

3

4

5

6

7

8

9

Pin = 8 W

VCC = 13.6 V

6 W

f = 470 MHz

12.5 V

VCC = 12.5 V

f = 470 MHz

Pin = 6 W

f = 470 MHz

VCC = 13.6 V

12.5 V

0

20

5.0

10

15

20

15

10

5.0

5.0

f = 450 MHz

470

25

10

f = 450 MHz

512

512

ZOL*

Zin

FREQUENCY

MHz

Zin

(OHMS)

ZOL*

(OHMS)

450

470

512

1.21 + j3.47

1.21 + j3.25

1.06 + j2.09

1.76 + j1.96

1.90 + j2.14

1.96 + j2.34

ZOL* = Conjugate of the optimum load impedance into which the device output

operates at a given output power, voltage and frequency.