MOTOROLA MRF894

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by MRF894/D
SEMICONDUCTOR TECHNICAL DATA
The RF Line
. . . designed for 24 volt UHF large–signal, common–base amplifier applications
in industrial and commercial FM equipment operating in the range of
804 – 960 MHz.
• Specified 24 Volt, 900 MHz Characteristics
Output Power = 30 Watts
Power Gain = 7.0 dB Min
Efficiency = 55% Min
30 W, 900 MHz
RF POWER
TRANSISTOR
NPN SILICON
• Series Equivalent Large–Signal Characterization
• Capable of 30:1 VSWR Load Mismatch at Rated Output Power and Supply
Voltage
• Gold Metallized, Emitter Ballasted for Long Life and Resistance to Metal
Migration
• Silicon Nitride Passivated
CASE 319–07, STYLE 1
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Collector–Emitter Voltage
VCEO
30
Vdc
Collector–Base Voltage
VCBO
50
Vdc
Emitter–Base Voltage
VEBO
4.0
Vdc
Collector Current — Continuous
IC
7.0
Adc
Total Device Dissipation @ TC = 25°C (1)
Derate above 25°C
PD
115
0.66
Watts
W/°C
Storage Temperature Range
Tstg
– 65 to +150
°C
Symbol
Max
Unit
RθJC
1.5
°C/W
THERMAL CHARACTERISTICS
Characteristic
Thermal Resistance, Junction to Case (2)
ELECTRICAL CHARACTERISTICS (TC = 25°C unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
Collector–Emitter Breakdown Voltage (IC = 25 mAdc, IB = 0)
V(BR)CEO
30
—
—
Vdc
Collector–Emitter Breakdown Voltage (IC = 25 mAdc, VBE = 0)
V(BR)CES
50
—
—
Vdc
Emitter–Base Breakdown Voltage (IE = 5.0 mAdc, IC = 0)
V(BR)EBO
4.0
—
—
Vdc
ICBO
—
—
10
mAdc
OFF CHARACTERISTICS
Collector Cutoff Current (VCB = 30 Vdc, IE = 0)
NOTES:
(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.
2. Thermal Resistance is determined under specified RF operating conditions by infrared measurement techniques.
REV 6
RF DEVICE DATA
MOTOROLA
Motorola, Inc. 1994
MRF894
21
ELECTRICAL CHARACTERISTICS — continued (TC = 25°C unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
hFE
10
—
120
—
Cob
—
45
—
pF
Common–Base Amplifier Power Gain
(Pout = 30 W, VCC = 24 Vdc, f = 900 MHz)
GPE
7.0
8.5
—
dB
Collector Efficiency
(Pout = 30 W, VCC = 24 Vdc, f = 900 MHz)
η
55
60
—
%
ON CHARACTERISTICS
DC Current Gain
(IC = 2.0 Adc, VCE = 5.0 Vdc)
DYNAMIC CHARACTERISTICS
Output Capacitance
(VCB = 30 Vdc, IE = 0, f = 1.0 MHz)
FUNCTIONAL TESTS
L1
L4
C9
C4
B
B
SOCKET
VRE
PORT
C1
+
ÇÇÇ
ÇÇÇ
ÇÇÇ
ÇÇÇ
TL1
+ 24 Vdc
SOCKET
+
C12
C2
ÇÇÇÇÇ
ÇÇÇÇÇ
ÇÇÇÇÇ
ÇÇÇÇÇ
C5
C7
DUT
C11
TL2
TL3
C6
B — Ferrite Bead, Ferroxcube 56–590–65–3B
C1, C13 — 5.0 µF, 50 Vdc
C2, C12 — 1000 pF Unelco
C3, C11 — 47 pF, 100 Mil Chip Capacitor
C4, C9 — 91 pF, Mini–Underwood
C5, C6 — 12 pF, Mini–Underwood
C7 — 18 pF, Mini–Underwood
C8 — 24 pF, Mini–Underwood
C10 — 0.8 – 8.0 pF Johanson Gigatrim
ÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇ
L3
L2
C3
C13
C8
TL4
C10
L1, L4 — 11 Turns #20 Enameled Over 10 Ω Carbon Resistor
L2, L3 — 4 Turns #20 Enameled, .15″ ID
TL1, TL4 — Micro Strip Line, 50 Ω
TL2 — Micro Strip, Zo = 30 Ω, λ/4 @ 875 MHz
TL3 — Micro Strip, Zo = 22 Ω, λ/4 @ 875 MHz
Board — 0.032″ Glass Teflon
Board — 2 oz. Cu CLAD, εr = 2.55
Figure 1. 850 – 900 MHz Broadband Circuit Schematic
MRF894
22
MOTOROLA RF DEVICE DATA
TYPICAL CHARACTERISTICS
50
900 MHz
30
960 MHz
20
VCC = 24 V
10
0
2
4
6
Pin, INPUT POWER (WATTS)
Pin = 8 W
30
6W
20
4W
10
VCC = 24 V
0
10
8
850
Figure 2. Output Power versus Input Power
950
10
Pin = 6 W
30
4W
80
GPB
8
G PB , POWER GAIN (dB)
40
3W
20
4
14
18
22
VCC, SUPPLY VOLTAGE (VOLTS)
26
Figure 4. Output Power versus Supply Voltage
MOTOROLA RF DEVICE DATA
30
60
VCC = 24 V
Pin = 6 W
VSWR
f = 900 MHz
10
70
ηc
6
2
10
0
900
925
f, FREQUENCY (MHz)
Figure 3. Output Power versus Frequency
50
Pout , OUTPUT POWER (WATTS)
875
INPUT VSWR
0
40
0
850
860
870
880
f, FREQUENCY (MHz)
η c , COLLECTOR EFFICIENCY
40
Pout , OUTPUT POWER (WATTS)
Pout , OUTPUT POWER (WATTS)
50
890
1.5:1
50
1.25:1
1:1
900
Figure 5. Typical Broadband Circuit Performance
MRF894
23
10
VCC = 24 Vdc, Pout = 30 W
5.0
f = 800 MHz
850
Zin
900
f
Frequency
MHz
Zin
Ohms
ZOL*
Ohms
800
850
900
960
0.9 + j4.5
1.3 + j4.7
1.6 + j4.4
1.5 + j3.7
1.0 + j0.7
1.1 + j0.9
1.2 + j1.1
1.2 + j1.3
960
Zo = 10 Ω
ZOL* = Conjugate of the optimum load impedance
ZOL* = into which the device output operates at a
ZOL* = given output power, voltage and frequency.
960
900
f = 800 MHz
0
ZOL*
850
1.0
2.0
3.0
4.0 5.0 6.0 7.0 8.0 9.0 10
Figure 6. Series Equivalent Impedance
MRF894
24
MOTOROLA RF DEVICE DATA
PACKAGE DIMENSIONS
Q 2 PL
-AL
IDENTIFICATION
NOTCH
6
5
0.15 (0.006)
M
T A
M
N
M
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
4
-N1
2
3
DIM
A
B
C
D
E
F
H
J
K
L
N
Q
K
F
D 2 PL
0.38 (0.015) M
B
0.38 (0.015)
T A
M
N
M
T A
M
M
N
M
J
H
C
E
-T-
SEATING
PLANE
STYLE 1:
PIN 1.
2.
3.
4.
5.
6.
INCHES
MIN
MAX
0.965 0.985
0.355 0.375
0.230 0.260
0.115 0.125
0.102 0.114
0.075 0.085
0.160 0.170
0.004 0.006
0.090 0.110
0.725 BSC
0.225 0.241
0.125 0.135
MILLIMETER
MIN
MAX
24.52 25.01
9.02
9.52
5.85
6.60
2.93
3.17
2.59
2.90
1.91
2.15
4.07
4.31
0.11
0.15
2.29
2.79
18.42 BSC
5.72
6.12
3.18
3.42
BASE (COMMON)
EMITTER (INPUT)
BASE (COMMON)
BASE (COMMON)
COLLECTOR (OUTPUT)
BASE (COMMON)
CASE 319–07
ISSUE M
MOTOROLA RF DEVICE DATA
MRF894
25
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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
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MRF894
26
◊
*MRF894/D*
MRF894/D
MOTOROLA RF DEVICE
DATA