1
MRFA2604
MOTOROLA RF DEVICE DATA
The RF Line
Broadband R.F. Array for
TV Transmitter
The MRFA2604 is a solid state class AB amplifier specifically designed for TV
transposers and transmitters. This amplifier incorporates microstrip technology
and reliable Motorola pushpull transistors.
The MRFA2604 includes a thermal compensation (differential gain is
constant versus average picture level (APL)) which can be partially discon-
nected.
Specified 28 Volts, 470860 MHz Characteristics
Output Power = 175 Watts (CW)/230 Watts (Video)
Minimum Gain = 8.0 dB (@ Nominal Power)
50
Input and Output Impedance
Class AB Operation
Thermally Compensated
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Supply Voltage
VCC
32
Vdc
Current
Imax
15
Adc
Storage Temperature Range
Tstg
40 to +100
C
Operating Temperature (1)
Top
20 to + 70
C
NOMINAL OPERATION CONDITION
Supply Voltage/Quiescent Current (2)
VCC = 28 V
IQ = 0.9 A
ELECTRICAL CHARACTERISTICS IN CW
(TC = 25
C, VCC = 28 V, IQ = 0.5 A, without thermal correction)
Characteristic
Symbol
Min
Typ
Max
Unit
Instantaneous Bandwidth
BW
470
--
860
MHz
Power Gain (Pout = 175 W)
Gp
8.0
9.0
--
dB
Gain Ripple (Pout = 175 W)
Grple
--
0.5
1.0
dB
Output Power @ 1.0 dB Compression
Pout
175 (3)
190
--
W
Efficiency (Pout = 175 W)
45 (3)
50
--
%
Input Return Loss
IRL
--
20
15
dB
ELECTRICAL CHARACTERISTICS IN VIDEO
(TC = 25
C, Isup = 0.9 A, with thermal compensation)
Characteristic
Symbol
Min
Typ
Max
Unit
Output Power @ 28 V (Peak Sync. B/G standard)
Pout
230
240
--
W
Power Gain @ black level (Psync = 230 W, VCC = 28 V)
Gp
8.0
9.0
--
dB
(1) Temperature is measured at temperature test point (on the flange of the transistor).
(2) Tuned in the factory for optimum thermal correction @ 25
C.
(3) Thermal correction cannot be disconnected, and CW performances are slightly affected ( 5.0 W, 3% typical), but output power with a
video
signal remain the same.
Order this document
by MRFA2604/D
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Motorola, Inc. 1997
MRFA2604
230 W PEAK SYNC.
470 860 MHz
CLASS AB
RF POWER AMPLIFIER
CASE 43901, STYLE 1
REV 1
MRFA2604
2
MOTOROLA RF DEVICE DATA
TYPICAL CHARACTERISTICS
Figure 1. Maximum Average Output Power
versus Temperature
200
180
160
140
120
100
80
60
40
20
0
80
70
60
50
40
30
20
10
0
TRANSISTOR FLANGE TEMPERATURE (
C)
MAXIMUM
A
VERAGE OUTPUT
POWER (CW)
Figure 2. Maximum Peak Synch. Output Power
(B/G Standard) versus Temperature
400
360
320
280
240
200
160
120
80
40
0
80
70
60
50
40
30
20
10
0
TRANSISTOR FLANGE TEMPERATURE (
C)
MAXIMUM PEAK SYNCH. OUTPUT
POWER (CW)
Figure 3. Without Thermal Compensation
Figure 4. With Thermal Compensation
WARNING: Please read instructions carefully for operating/setup and mounting recommendations prior to operating this device.
Figure 5. Internal Schematic and External Connections
10
8
6
4
2
0
2
4
6
8
10
10
8
6
4
2
0
2
4
6
8
10
(TYPICAL)
(TYPICAL)
DIFFERENTIAL GAIN (%) WITH APL 10% / 90%
DIFFERENTIAL GAIN (%) WITH APL 10% / 90%
* Loads positions can be inverted if
required.
50
LOAD
INPUT
OUTPUT
50
LOAD
(*)
(*)
BIAS CIRCUIT
BALUN
INPUT
BALUN
MA
TCHING
NETWORK
OUTPUT
MA
TCHING
NETWORK
BALUN
INPUT
BALUN
MA
TCHING
NETWORK
OUTPUT
MA
TCHING
NETWORK
VCC
3
MRFA2604
MOTOROLA RF DEVICE DATA
CW MEASUREMENTS WITHOUT THERMAL COMPENSATION**
(see Figure 23)
Figure 6. Power Gain versus Frequency
10
9
8
900
450
f, FREQUENCY (MHz)
Figure 7. Gain Compression versus Frequency
0
1
2
f, FREQUENCY (MHz)
GAIN COMPRESSION (dB)
Figure 8. Supply Current versus Frequency
Figure 9. Power Gain versus Input Power
** Measurement results are typical values and are not guaranteed
f, FREQUENCY (MHz)
Pin, POWER (dB)
900
450
900
450
0.00
20
VCC = 28 V
ICQ = 500 mA
Pout = 180 W
VCC = 28 V
ICQ = 500 mA
Pout = 180 W
14
13
12
11
10
11
10
9
VCC = 28 V
ICQ = 500 mA
Pout = 180 W
VCC = 28 V
ICQ = 500 mA
Pmax = 200 W
HOT (TENTH SWEEP)
COLD (FIRST SWEEP)
P
G
, POWER GAIN (dB)
SUPPL
Y
CURRENT
(A)
POWER GAIN (dB)
MRFA2604
4
MOTOROLA RF DEVICE DATA
VIDEO MEASUREMENTS WITH THERMAL COMPENSATION, B/G STANDARD
(Measurement results are typical values and are not guaranteed)
Figure 10. Differential Gain 190 W Sync
Figure 11. Differential Gain 240 W Sync
Figure 12. Differential Phase 190 W Sync
Figure 13. Differential Phase 240 W Sync
DIFFERENTIAL GAIN (%) / CHANNEL 69 / 28 V/900 mA
DIFFERENTIAL GAIN (%) / CHANNEL 69 / 28 V/900 mA
DIFFERENTIAL PHASE (
) / CHANNEL 69 / 28 V/900 mA
DIFFERENTIAL GAIN (
) / CHANNEL 69 / 28 V/900 mA
Figure 14. "Red Field" 190 W Sync
Figure 15. "Red Field" 240 W Sync
"RED FIELD" / CHANNEL 69 / 28 V/900 mA
"RED FIELD" / CHANNEL 69 / 28 V/900 mA
SIDE BAND REGENERATION 10 dB/div2 MHz/div
SIDE BAND REGENERATION 10 dB/div2 MHz/div
190 W SYNC
190 W SYNC
190 W SYNC
10
8
6
4
2
0
2
4
6
8
10
6
4
2
0
2
4
6
240 W SYNC
240 W SYNC
240 W SYNC
10
8
6
4
2
0
2
4
6
8
10
6
4
2
0
2
4
6
5
MRFA2604
MOTOROLA RF DEVICE DATA
VIDEO MEASUREMENTS WITH THERMAL COMPENSATION, BG STANDARD
(Measurement results are typical values and are not guaranteed)
VCC = 28 V
ICQ = 900 mA
8 dB/ 16 dB/ 10 dB
860 MHz
665 MHz
470 MHz
Figure 16. "Horizontal Sweep" 190 W Sync
Figure 17. "Horizontal Sweep" 240 W Sync
"HORIZONTAL SWEEP" / CHANNEL 69 / 28 V/900 mA
"HORIZONTAL SWEEP" / CHANNEL 69 / 28 V/900 mA
SIDE BAND REGENERATION 10 dB/div2 MHz/div
SIDE BAND REGENERATION 10 dB/div2 MHz/div
Figure 18. Input Sync. versus Output Power
200
150
100
260
100
P, PEAK OUTPUT POWER (W)
INPUT
SYNC.
AMPLITUDE
(%)
Figure 19. Power Gain versus Input Power
10
9
8
Pin, POWER (dB)
POWER GAIN MAG. (dB)
0.00
20
VCC = 28 V
ICQ = 900 mA
CHANNEL 69
BLACK LEVEL
VCC = 28 V
ICQ = 900 mA
Pmax = 200 W
f = 860 MHz
250
140
180
220
20
10
0
POWER GAIN PHASE (
)
Figure 20. Delay versus Frequency
5
0
900
450
f, FREQUENCY (MHz)
TRANSMISSION DELA
Y
(ns)
Figure 21. Intermodulation versus Output Power
40
50
60
P, PEAK OUTPUT POWER (W)
INTERMODULA
TION (dB)
250
50
VCC = 28 V
ICQ = 900 mA
10
100
150
200
240 W SYNC
190 W SYNC
RELATIVE INPUT SYNC. LEVEL TO MAINTAIN OUTPUT
SYNC. @ 27% OF RF POWER
POWER SWEEP ON A NETWORK ANALYZER
(GAIN MAGNITUDE & GAIN PHASE)
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