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polyfet rf devices
General Description
Silicon VDMOS and LDMOS
transistors designed specifically
for broadband RF applications.
Suitable for Militry Radios,
Cellular and Paging Amplifier Base
Stations, Broadcast FM/AM, MRI,
Laser Driver and others.
"Polyfet" process features
low feedback and output capacitances
resulting in high F transistors with high
input impedance and high efficiency.
Total
Device
Dissipation
220
TM
t
ABSOLUTE MAXIMUM RATINGS ( T =
Junction to
Case Thermal
Resistance
o
Watts V
0.75
C/W
Maximum
Junction
Temperature
LX703
SILICON GATE ENHANCEMENT MODE
RF POWER TRANSISTORLDMOS
100.0
Watts
Package Style
HIGH EFFICIENCY, LINEAR
HIGH GAIN, LOW NOISE
o
25 C )
Storage
Temperature
o
-65 C to 150 C200 C A V
DC Drain
Current
oo
13.0
Drain to
Gate
Voltage
70 V
Single Ended
LX2
Drain to
Source
Voltage
70
Gate to
Source
Voltage
20
Gps
η
Bvdss
Idss
Igss
Vgs
Idsat
Ciss
Crss
Coss
RF CHARACTERISTICS (
PARAMETERSYMBOL MIN TYP MAX UNITS TEST CONDITIONS
Common Source Power Gain
Drain Efficiency
Load Mismatch ToleranceVSWR
12
55
100.0
WATTS OUTPUT )
20:1 Relative
dB
%
0.80
Idq = A, Vds = V, F =
Idq =
0.80
A, Vds = V, F =
Idq = 0.80
A, Vds = V, F =
28.0
28.0
28.0
ELECTRICAL CHARACTERISTICS ( EACH SIDE )
PARAMETERSYMBOL MIN TYP MAX UNITS TEST CONDITIONS
Drain Breakdown Voltage
Zero Bias Drain Current
Gate Leakage Current
Gate Bias for Drain Current
Forward TransconductancegM Vds = 10V, Vgs = 5V
Saturation Current
Common Source Input Capacitance
Common Source Feedback Capacitance
Common Source Output Capacitance
65
6.0
1
1 7
4.8
0.25
30.00
180.0
4.8
90.0
V
mA
uA
V
Mho
Ohm
Amp
pF
pF
pF
0.60Ids = mA, Vgs = 0V
Vds =
Vds = 0V Vgs = 30V
Vgs = 20V, Ids = Rdson Saturation Resistance
Vgs = 20V, Vds = 10V
Vds =
Vds =
Vds =
28.0
0.60
V, Vgs = 0V
A, Vgs = VdsIds =
16.00
Vgs = 0V, F = 1 MHz28.0
Vgs = 0V, F = 1 MHz28.0
Vgs = 0V, F = 1 MHz28.0
MHz
500
500
MHz
500
MHz
A
POLYFET RF DEVICES
1110 Avenida Acaso, Camarillo, Ca 93012 Tel:(805) 484-4210 FAX: (805) 484-3393 EMAIL:Sales@polyfet.com URL:www.polyfet.com
REVISION 03/08/2001
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LX703
ID IN AMPS
POUT VS PIN GRAPH
LX703 POUT VS PIN Freq=500MHz, VDS=28V, Idq=.6A
52
50
48
Efficiency = 60%
46
44
42
40
38
23 25 27 29 31 33 35 37 39
30
25
20
15
10
5
1dB compresion = 100W
PIN IN dBm
L1B 3 DIE IV
Gain
Pout
16.00
15.00
14.00
13.00
12.00
11.00
10.00
9.00
CAPACITANCE VS VOLTAGE
L1B 3DIE CAPACITANCE
1000
Ciss
100
Coss
10
Crss
1
0 5 10 15 20 25 30
VDS IN VOLTS
ID & GM VS VGSIV CURVE
100
10
1
L1B 3 DIE ID, GM vs VG
ID
GM
0
0 2 4 6 8 10 12 14 16 18 20
vg=2v Vg=4v Vg=6v vg=8v vg=10v vg=12v
VDS IN VOLTS
0.1
0 2 4 6 8 10 12 14
Vgs in Volts
S11 & S22 SMITH CHART PACKAGE DIMENSIONS IN INCHES
Tolerance .XX +/-0.01 .XXX +/-.005 inches
POLYFET RF DEVICES
1110 Avenida Acaso, Camarillo, Ca 93012 Tel:(805) 484-4210 FAX: (805) 484-3393 EMAIL:Sales@polyfet.com URL:www.polyfet.com
REVISION 03/08/2001
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