MRF8S7235N FREESCALE [Freescale Semiconductor, Inc], MRF8S7235N Datasheet - Page 8

• Manufacturer Part Number: MRF8S7235N
• Description: RF Power Field Effect Transistor
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

8
MRF8S7235NR3
(1) Load impedance for optimum P1dB power.
Z
Z
(1) Load impedance for optimum P1dB efficiency.
Z
Z
source
load
source
load
(MHz)
(MHz)
728
748
768
728
748
768
f
f
= Impedance as measured from gate contact to ground.
= Impedance as measured from drain contact to ground.
= Impedance as measured from gate contact to ground.
= Impedance as measured from drain contact to ground.
Figure 11. Load Pull Performance — Maximum Drain Efficiency Tuning
1.00 - j0.80
0.70 - j1.10
0.80 - j1.25
1.00 - j0.80
0.70 - j1.10
0.80 - j1.25
Z
Z
source
source
(Ω)
(Ω)
Figure 10. Load Pull Performance — Maximum P1dB Tuning
V
V
DD
DD
= 28 Vdc, I
= 28 Vdc, I
Input
Load Pull
Tuner
Input
Load Pull
Tuner
1.40 + j0.20
1.20 + j0.10
1.10 + j0.20
0.50 - j0.70
0.50 - j0.60
0.50 - j0.60
Z
Z
load
load
(Ω)
(Ω)
(1)
(1)
DQ
DQ
= 1200 mA, Pulsed CW, 10 μsec(on), 10% Duty Cycle
= 1200 mA, Pulsed CW, 10 μsec(on), 10% Duty Cycle
Z
Z
source
source
(dBm)
(dBm)
55.3
55.4
55.3
52.4
52.6
52.6
Device
Under
Test
Device
Under
Test
P1dB
P1dB
(W)
339
347
339
(W)
174
182
182
Z
Z
load
load
Max Drain Efficiency
Max Output Power
η
η
54.1
53.9
53.5
67.4
67.0
67.1
D
D
(%)
(%)
Output
Load Pull
Tuner
Output
Load Pull
Tuner
(dBm)
(dBm)
56.2
56.2
56.1
53.1
53.5
53.3
P3dB
P3dB
Freescale Semiconductor, Inc.
(W)
417
417
407
(W)
204
224
214
η
η
57.2
56.9
56.9
70.0
69.9
69.9
D
D
(%)
(%)
RF Device Data