1
MRF426MOTOROLA RF DEVICE DATA
The RF Line
. . . designed for high gain driver and output linear amplifier stages in 1.5 to
30 MHz HF/SSB equipment.
•Specified 28 Volt, 30 MHz Characteristics —
Output Power = 25 W (PEP)
Minimum Gain = 22 dB
Efficiency = 35%
•Intermodulation Distortion @ 25 W (PEP) —
IMD = –30 dB (Max)
•100% Tested for Load Mismatch at all Phase Angles with 30:1 VSWR
•Class A and AB Characterization
•BLX 13 Equivalent
MAXIMUM RATINGS
Rating Symbol Value Unit
Collector–Emitter Voltage VCEO 35 Vdc
Collector–Base Voltage VCBO 65 Vdc
Emitter–Base Voltage VEBO 4.0 Vdc
Collector Current — Continuous IC3.0 Adc
Withstand Current — 5 s — 6.0 Adc
Total Device Dissipation @ TC = 25°C (1)
Derate above 25°CPD70
0.4 Watts
W/°C
Storage Temperature Range Tstg –65 to +150 °C
THERMAL CHARACTERISTICS
Characteristic Symbol Max Unit
Thermal Resistance, Junction to Case RθJC 2.5 °C/W
ELECTRICAL CHARACTERISTICS (TC = 25°C unless otherwise noted.)
Characteristic Symbol Min Typ Max Unit
OFF CHARACTERISTICS
Collector–Emitter Breakdown Voltage (IC = 50 mAdc, IB = 0) V(BR)CEO 35 — — Vdc
Collector–Base Breakdown Voltage (IC = 50 mAdc, IE = 0) V(BR)CBO 65 — — Vdc
Emitter–Base Breakdown Voltage (IE = 10 mAdc, IC = 0) V(BR)EBO 4.0 — — Vdc
Collector Cutoff Current (VCE = 28 Vdc, VBE = 0) ICES — — 10 mAdc
NOTE: (continued)
1. This device is designed for RF operation. The total device dissipation rating applies only when the device is operated as an RF amplifier .
Order this document
by MRF426/D
SEMICONDUCTOR TECHNICAL DATA
25 W (PEP), 30 MHz
RF POWER
TRANSISTOR
NPN SILICON
CASE 211–07, STYLE 1
Motorola, Inc. 1994
MRF426
2MOTOROLA RF DEVICE DATA
ELECTRICAL CHARACTERISTICS — continued (TC = 25°C unless otherwise noted.)
Characteristic UnitMaxTypMinSymbol
ON CHARACTERISTICS
DC Current Gain
(IC = 1.0 Adc, VCE = 5.0 Vdc) hFE 10 35 — —
DYNAMIC CHARACTERISTICS
Output Capacitance
(VCB = 30 Vdc, IE = 0, f = 1.0 MHz) Cob — 60 80 pF
FUNCTIONAL TESTS (SSB)
Common–Emitter Amplifier Gain
(VCC = 28 Vdc, Pout = 25 W (PEP), f1 = 30 MHz,
f2 = 30.001 MHz, ICQ = 25 mA)
GPE 22 25 — dB
Collector Efficiency
(VCC = 28 Vdc, Pout = 25 W (PEP), f1 = 30 MHz,
f2 = 30.001 MHz, ICQ = 25 mA)
η35 — — %
Intermodulation Distortion (2)
(VCC = 28 Vdc, Pout = 25 W (PEP), f1 = 30 MHz,
f2 = 30.001 MHz, ICQ = 25 mA)
IMD(d3) — –35 –30 dB
Load Mismatch
(VCC = 28 Vdc, Pout = 25 W (PEP), f1 = 30 MHz,
f2 = 30.001 MHz, ICQ = 25 mA, VSWR 30:1 at All Phase Angles)
ψNo Degradation in Output Power
CLASS A PERFORMANCE
Intermodulation Distortion (2) and Power Gain
(VCC = 28 Vdc, Pout = 8.0 W (PEP), f1 = 30 MHz,
f2 = 30.001 MHz, ICQ = 1.2 Adc)
GPE
IMD(d3)
IMD(d5)
—
—
—
23.5
–40
–55
—
—
—
dB
NOTE:
2. To Mil–Std–1311 Version A, Test Method 2204B, Two Tone, Reference each Tone.
Figure 1. 30 MHz Linear Test Circuit
C1, C2 — ARCO 469, 190–780 pF
C3, C4 — ARCO 464, 25–280 pF
C5 — 120 pF Dipped Mica
C6, C7 — 100 µF, 15 Vdc
C8 — 680 pF F.T. Allen Bradley
C9 — 1.0 µF 35 V Tantalum
CR1 — 1N4997
L1 — 3 Turns #16 0.25″ ID
L2 — 6 Turns #16 0.5″ ID
L3 — 7 Turns #20 0.38″ ID
L4 — 10 µH Molded Choke Delevan
RFC1 — Ferroxcube VK200/20–4B
RFC2 — 3–Ferroxcube 5653065–3B
RF — Input/Output Connectors UG53 A/µ
R1 — 10 Ω 1/2 Watt 10%
Adjust Bias (Base) for ICQ = 20 mA with No RF Applied
BIAS
INPUT
RF
INPUT
RF OUTPUT
+
–
28 Vdc
RFC1
C6 C7 CR1
L4
L3
C1
C2 R1
DUT
L2
C8
C9
RFC2
C5
C3
C4
L1
3
MRF426MOTOROLA RF DEVICE DATA
Figure 2. Output Power versus Input Power Figure 3. Output Power versus Supply Voltage
Figure 4. Power Gain versus Frequency Figure 5. Intermodulation Distortion
versus Output Power
Figure 6. DC Safe Operating Area
P , OUTPUT POWER (WATTS)
out
50
200 Pin, INPUT POWER (mW)
f = 30 MHz
ICQ = 25 mA
VCC = 28 Vdc
40
30
20
10
040 60 80 100
P , OUTPUT POWER (WATTS PEP)
out
2016 VCC, SUPPLY VOLTAGE (VOLTS)
40
30
20
10
024 28 32
f = 30, 30.001 MHz
ICQ = 25 mA
IMD(d3) = –35 dB
GPE, POWER GAIN (dB)
40
1.5 f, FREQUENCY (MHz)
2 3 5 7 10 302015
VCC = 28 V
ICQ = 25 mA
Pout = 25 W PEP
35
30
25
20
15
IMD, INTERMODULATION DISTORTION (dB)
–25
0Pout, OUTPUT POWER (WATTS PEP)
10 20 30
–30
–35
–40
–45
–50
d3
d5
f = 30, 30.001 MHz
ICQ = 25 mA
VCC = 28 V
5
1VCE, COLLECTOR–EMITTER VOLTAGE (VOLTS)
2
IC, COLLECTOR CURRENT (AMP)
5 10 20 50 100
TC = 25
°
C
0.05
0.1
0.25
0.5
1
2.5
MRF426
4MOTOROLA RF DEVICE DATA
Figure 7. Output Capacitance versus Frequency Figure 8. Output Resistance versus Frequency
Figure 9. Series Equivalent Input Impedance
1.5 f, FREQUENCY (MHz)
2 3 5 7 10 302015
2500
f, FREQUENCY (MHz)
2 3 5 7 10 302015
25
1.5
2000
1500
1000
500
0
15
5
VCC = 28 V
ICQ = 25 mA
Pout = 25 W PEP
VCC = 28 V
ICQ = 25 mA
Pout = 25 W PEP
Cout, PARALLEL EQUIVALENT OUTPUT
CAPACITANCE (pF)
Rout, PARALLEL EQUIVALENT OUTPUT
RESISTANCE (OHMS)
7.5
f = 2.0 MHz
15
30
Zo = 10
Ω
4.0
0
8.0
10.0
18.0 20.0
16.0
12.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
9.0
14.0
1.0 2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
12.0
14.014.0
12.0
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0 1.0
VCC = 28 V
ICQ = 25 mA
Pout = 25 W PEP
f
MHz Zin
Ohms
2.0
4.0
7.5
15
30
6.20 – j6.65
4.65 – j5.50
3.25 – j4.05
2.45 – j2.90
1.4 – j0.77
5
MRF426MOTOROLA RF DEVICE DATA
PACKAGE DIMENSIONS
CASE 211–07
ISSUE N
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
A
UM
M
Q
RB
1
4
32
D
K
E
SEATING
PLANE
C
J
H
S
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A0.960 0.990 24.39 25.14
B0.370 0.390 9.40 9.90
C0.229 0.281 5.82 7.13
D0.215 0.235 5.47 5.96
E0.085 0.105 2.16 2.66
H0.150 0.108 3.81 4.57
J0.004 0.006 0.11 0.15
K0.395 0.405 10.04 10.28
M40 50 40 50
Q0.113 0.130 2.88 3.30
R0.245 0.255 6.23 6.47
S0.790 0.810 20.07 20.57
U0.720 0.730 18.29 18.54
_ _ _ _
STYLE 1:
PIN 1. EMITTER
2. BASE
3. EMITTER
4. COLLECTOR
MRF426
6MOTOROLA RF DEVICE DATA
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty , representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit,
and specifically disclaims any and all liability , including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different
applications. All operating parameters, including “T ypicals” must be validated for each customer application by customer’s technical experts. Motorola does
not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in
systems intended for surgical implant into the body , or other applications intended to support or sustain life, or for any other application in which the failure of
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against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part.
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MRF426/D
*MRF426/D*
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