MRF891 Datasheet, PDF (3/4 Pages) Motorola, Inc – RF POWER TRANSISTORS NPN SILICON

8
850 MHz
7
900 MHz
6
960 MHz
5
4
3
VCC = 24 Vdc
2
1
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Pin, INPUT POWER (WATTS)
Figure 2. Output Power versus Input Power
8
f = 900 MHz
6
Pin = 1 W
0.6 W
4
0.2 W
2
18
20
22
24
26
28
VCC, SUPPLY VOLTAGE (VOLTS)
Figure 3. Output Power versus Supply Voltage
8
Pin = 1 W
7
6
0.6 W
5
4
3
2
VCC = 24 Vdc
1
0.2 W
0
850
875
900
925
950
f, FREQUENCY (MHz)
Figure 4. Output Power versus Frequency
8
7
Pin = 0.6 W
VCC = 24 Vdc
6
Pout
5
4
60%
η_c
3
50%
2
2.0:1
1
INPUT VSWR
1.6:1
0
850
875
900
925
f, FREQUENCY (MHz)
1.2:1
950
Figure 5. Typical Broadband Circuit Performance
VCC = 24 Vdc, Pout = 5.0 W, Eff > 50%
f
Zin
MHz
Ohms
850
1.1 + j3.0
900
1.0 + j3.25
960
1.18 + j3.5
960 ^Zin
900
f = 850 MHz
Zo = 10 Ω
f = 850 MHz
VCC = 24 Vdc, Pout = 5.0 W, Eff > 50%
f
ZOL*
MHz
Ohms
850
8.34 – j13.2
900
9.1 – j13.8
960
10.4 – j14.6
ZOL* = Conjugate of the optimum load
impedance into which the device output
operates at a given output power ,
voltage and frequency.
900
960
ZOL*
Figure 6. Series Equivalent Input Impedance
Figure 7. Series Equivalent Output Impedance
MOTOROLA RF DEVICE DATA
MRF891 MRF891S
2–13