DMD1029
DMD1029-A
Document Number 6859
Issue 3
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed
to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use.
Semelab encourages customers to verify that datasheets are current before placing orders.
PDPower Dissipation
BVDSS Drain – Source Breakdown Voltage *
BVGSS Gate – Source Breakdown Voltage*
ID(sat) Drain Current*
Tstg Storage Temperature
TjMaximum Operating Junction Temperature
875W (438W -A Version)
70V
±20V
35A
–65 to 150°C
200°C
MECHANICAL DATA GOLD METALLISED
MULTI-PURPOSE SILICON
DMOS RF FET
350W – 28V – 175MHz
PUSH–PULL
APPLICATIONS
•VHF/UHF COMMUNICATIONS
from 1 MHz to 400 MHz
METAL GATE RF SILICON FET
TetraFET
* Per Side
FEATURES
•SUITABLE FOR BROAD BAND APPLICATIONS
•SIMPLE BIAS CIRCUITS
•ULTRA-LOW THERMAL RESISTANCE
•BeO FREE
•LOW Crss
• HIGH GAIN – 16 dB MINIMUM
M
K
J
I
O
N
A
C
(
2 p
l
s
)
D
F
E
(
4 p
l
s
)
B
G
(
t
y
p
)
P
(
2 p
l
s
)
1
5 4
32
H
D1
PIN 1 SOURCE (COMMON) PIN 2 DRAIN 1
PIN 3 DRAIN 2 PIN 4 GATE 2
PIN 5 GATE 1
DIM Millimetres Tol. Inches Tol.
A15.24 0.50 0.600 0.020
B10.80 0.13 0.425 0.005
C45° 5° 45° 5°
D9.78 0.13 0.385 0.005
E8.38 0.13 0.330 0.005
F27.94 0.13 1.100 0.005
G1.52R 0.13 0.060R 0.005
H10.16 0.15 0.400 0.006
I21.84 0.23 0.860 0.009
J0.10 0.02 0.004 0.001
K1.96 0.13 0.077 0.005
M1.02 0.13 0.040 0.005
N4.45 0.38 0.175 0.015
O34.04 0.13 1.340 0.005
P1.63R 0.13 0.064R 0.005
ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C unless otherwise stated)
DMD1029
DMD1029-A
Document Number 6859
Issue 3
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed
to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use.
Semelab encourages customers to verify that datasheets are current before placing orders.
Parameter Test Conditions Min. Typ. Max. Unit
70
7
7
1 7
5.6
0.1
16
60
20:1
420
210
17.5
VGS = 0 ID= 100mA
VDS = 28V VGS = 0
VGS = 20V VDS = 0
ID= 10mA VDS = VGS
VDS = 10V ID= 6A
ID= 10mA VDS = VGS
PO= 350W
VDS = 28V IDQ = 2A
f = 175MHz
VDS = 28V VGS = –5V f = 1MHz
VDS = 28V VGS = 0 f = 1MHz
VDS = 28V VGS = 0 f = 1MHz
V
mA
µA
V
mhos
V
dB
%
—
pF
pF
pF
ELECTRICAL CHARACTERISTICS (Tcase = 25°C unless otherwise stated)
Drain–Source Breakdown
Voltage
Zero Gate Voltage
Drain Current
Gate Leakage Current
Gate Threshold Voltage*
Forward Transconductance*
Gate Threshold Voltage
Matching Between Sides
Common Source Power Gain
Drain Efficiency
Load Mismatch Tolerance
Input Capacitance
Output Capacitance
Reverse Transfer Capacitance
RTHj–case Thermal Resistance Junction – Case Max. 0.2°C / W
0.4 °C / W -A Version
THERMAL DATA
* Pulse Test: Pulse Duration = 300 µs , Duty Cycle ≤2%
TOTAL DEVICE
PER SIDE
PER SIDE
BVDSS
IDSS
IGSS
VGS(th)
gfs
VGS(th)match
GPS
η
VSWR
Ciss
Coss
Crss
DMD1029
DMD1029-A
Document Number 6859
Issue 3
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed
to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use.
Semelab encourages customers to verify that datasheets are current before placing orders.
0
50
100
150
200
250
300
350
400
P
W
0
3
6
9
12
15
18
21
24
Gain
dB
175MHz, Idq=2A, Vds=28V
350MHz, Idq=1.4A, Vds=30V
0
50
100
150
200
250
300
350
400
P
out
W
0
10
20
30
40
50
60
70
80
Efficiency
%
175MHz, Idq=2A, Vds=28
350MHz, Idq=1.4A, Vds=30
Figure 1 – Gain vs. Power Output. Figure 2 – Efficiency vs. Power Output.
0
50
100
150
200
250
300
350
P
out
W PEP
-60
-50
-40
-30
-20
-10
IMD3
dBc
IMD3 (dBc)
f
1
= 175 MHz
f
2
= 175.1 MHz
V
ds
= 28V
I
dq
= 2A
Figure 3 – IMD vs. Power Output
DMD1029
DMD1029-A
Document Number 6859
Issue 3
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed
to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use.
Semelab encourages customers to verify that datasheets are current before placing orders.
0
5
10
15
20
25
30
35
40
45
50
0.00
5.00
10.00
15.00
20.00
25.00
30.00
35.00
V
DS
(V)
I
DS
(A)
Vg=13 V
Vg=12 V
Vg=11 V
Vg=10 V
Vg=9V
Vg=8 V
Vg=7 V
Vg=6 V
Vg=5 V
1
10
100
1000
0 5 10 15 20 25 30
Vds V
Capacitance pF
Output capacitance
Input Capacitance
Reverse transfer capacitance
Figure 4 – Typical IV Characteristics.
Figure 5 – Typical CV Characteristics.
DMD1029
DMD1029-A
Document Number 6859
Issue 3
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed
to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use.
Semelab encourages customers to verify that datasheets are current before placing orders.
T2
T3
T4
T6
T5
T1
1u
1u
2-18 pF
47pF
680pF
680pF
2-18 pF
12
1n
L2
L1
10k
1n
100k
DMD1029
DMD1029
T1 7cm RG316 coax on Siemens A1 x 1 2 hole core
T2,3 7cm RG316 coax on Siemens A1 x 1 2 hole core
T4,5 14cm RG316 coax
T6 11cm RG316 coax
L1 8.5 turns 1mm dia wire, 4mm internal diameter
DMD1029 175MHz TEST JIG
L2 1.5 turns 1mm dia wire on Siemens A1 x 1 2 hole core
Gate-Bias
28V
100n
1n
100u
100n
90pF