SD1480
RF & MICROWAVE TRANSISTORS
VHF APPLICATIONS
.
.
.
.
.
.
.
136 - 175 MHz
28 VOLTS
EFFICIENCY 55%
COMMON EMITTER
GOLD METALLIZATION
INTERNAL INPUT MATCHING
P
OUT
=
125 W MIN. WITH 9.2 dB GAIN
.500 6LFL (M111)
epoxy sealed
ORDER CODE
SD1480
BRANDING
SD1480
PIN CONNECTION
DESCRIPTION
The SD1480 is a common emitter 28 V Class C
epitaxial silicon NPN planar transistor designed
primarily for VHF communications applications.
This internally matched device incorporates dif-
fused emitter ballasting resistors nad provides high
gain and stable operation across the entire 136
- 175 MHz VHF communications band.
ABSOLUTE MAXIMUM RATINGS
(T
case
=
25
°
C)
Symbol
Parameter
Value
Unit
1. Collector
2. Base
3. Emitter
4. Emitter
V
CBO
V
CEO
V
CES
V
EBO
I
C
P
DISS
T
J
T
STG
Collector-Base Voltage
Collector-Emitter Voltage
Collector-Emitter Voltage
Emitter-Base Voltage
Device Current
Power Dissipation
Junction Temperature
Storage Temperature
65
36
65
4.0
20
270
+200
−
65 to +150
V
V
V
V
A
W
°
C
°
C
°C/W
1/6
THERMAL DATA
R
TH(j-c)
Junction-Case Thermal Resistance
June 20, 1994
0.65
SD1480
ELECTRICAL SPECIFICATIONS
(T
case
=
25
°
C)
STATIC
Symbol
Test Conditions
Value
Min.
Typ.
Max.
Unit
BV
CBO
BV
CES
BV
CEO
BV
EBO
I
CES
h
FE
DYNAMIC
Symbol
I
C
=
100 mA
I
C
=
100 mA
I
C
=
100 mA
I
E
=
10 mA
V
CE
=
30 V
V
CE
=
5 V
I
E
=
0 mA
V
BE
=
0 V
I
B
=
0 mA
I
C
=
0 mA
I
E
=
0 mA
I
C
=
5 A
65
65
35
4.0
—
20
—
—
—
—
—
—
—
—
—
—
15
200
V
V
V
V
mA
—
Test Conditions
Value
Min.
Typ.
Max.
Unit
P
OUT
P
G
η
c
C
OB
f
=
150 MHz
f
=
150 MHz
f
=
150 MHz
f
=
1 MHz
P
IN
=
15 W
P
OUT
=
125 W
P
OUT
=
125 W
V
CB
=
28 V
P
IN
=
15 W
V
CE
=
28 V
V
CE
=
28 V
V
CE
=
28 V
V
CE
=
28 V
125
9.2
55
—
20:1
—
—
—
—
—
—
—
—
250
—
W
dB
%
pF
VSWR
Load
f
=
150 MHz
Mismatch
TYPICAL PERFORMANCE
OUTPUT CAPACITANCE vs COLLECTOR BASE
VOLTAGE
INPUT CAPACITANCE vs EMITTER BASE VOLTAGE
2/6
SD1480
TYPICAL PERFORMANCE (cont’d)
POWER OUTPUT vs POWER INPUT
INPUT VSWR vs FREQUENCY
POWER OUTPUT vs COLLECTOR EMITTER
VOLTAGE
POWER GAIN & COLLECTOR EFFICIENCY vs
FREQUENCY
3/6
SD1480
TEST CIRCUIT
C1
C2
C3
C4, C5
C6
C7
C8
C9
C10
C11
C12
C13, C15
C14
C16
:
:
:
:
:
:
:
:
:
:
:
:
:
:
.080pF Arco 462
25mF Underwood
2.020pF Arco 402
15pF Underwood
240pF ATC Chip Capacitor
270pF ATC Chip Capacitor
150pF Underwood
180pF Underwood
100pF Underwood
8.20pF Johanson JMC5501
33pF Underwood
.15
µ
F Disc Capacitor
100pF Underwood
10
µ
F Electrolytic
L1
L2
L3
L4
Z1
Z2
Z3
Z4
PCB:
: See Detail A
: Ferroxcube VK200 19/4B
: 1 Turn #16 AWG 250 I.D. Close Wound
: 5 Turns #16 AWG 250 I.D. Close Wound
:
:
:
:
Microstrip, .330”
Microstrip, .200”
Microstrip, .200”
Microstrip, .200”
W x 1.600” L
W x .400” L
W x .600” L
W x 1.600” L
3M 1oz. Doulbe Sided 1/16” Teflon-Glass, Er
=
2.5
5/6
Embedded System
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