Preliminary
Hexawave, Inc.
HW3238C
Power Module
3/16/98
Features
l
Outline Drawing
Frequency : 3.4 ~ 3.6 GHz
High Linearity
50 ohm Input/ Output Impedances
l
l
Maximum Ratings
(T
C
=25¢
Parameters
DC Supply Voltage
DC Supply Voltage
RF Input Power
RF Output Power
(V
DD1
= V
DD2
= V
DD3
= 7V)
Operating Case Temp.
Storage Temperature
Symbol
V
DD
V
GG
P
IN
P
OUT
T
C
T
STG
)
J
Value
8
-5
+5
32
-20 to +70
-30 to +110
Unit
V
V
dBm
dBm
¢ J
¢ J
1. Lead dimension of cross section: 0.25 x 0.5 mm
2. Tolerance of lead pitch:
±0.3
mm
Unit: mm (inch)
1. P
IN
2. V
GG
3. V
DD1
4. V
DD2
5. V
DD3
6. P
OUT
Recommended Operating Condition
Parameters
DC Supply Voltage
DC Supply Voltage
RF Input Power
Symbol
V
DD
V
GG
P
IN
Typ.
7
-4
-6
)
J
Z
S
= Z
L
= 50 ohms, V
GG
= -4V
Typ.
-
24.0
29.0
30.0
-
-
-
-
-
Max.
3.6
-
-
-
580
-32
-70
-
-
Unit
GHz
dBm
dB
dBm
mA
dBc
dBc
dB
dB
V
DD
= 7V, PIN = -6 dBm
V
DD
= 7V, P
IN
= -6 dBm
V
DD
= 7V
V
DD
= 7V
V
DD
= 7V
P
OUT
= 24 dBm
Test Conditions
Max.
8
-5
+2
Unit
V
V
dBm
Electrical Characteristics
(T
C
= 25¢
Parameter
Frequency
Linear Output Power
Linear Gain
Power 1dB
Compression
Total Current
2nd Harmonics
Spurious Signals
Input Return Loss
Output Return Loss
Symbol
f
P
OUT
G
P
1dB
I
DD
2f
C
-
-
-
Min.
3.4
-
28.0
29.0
-
-
-
10
10
2 Prosperity Road II, Science-Based Industrial Park, Hsinchu, Taiwan TEL 886-3-578-5100
All rights reserved.
Hexawave Inc.
FAX 886-3-577-0512
All specifications are subject to change without notice.
Preliminary
Hexawave, Inc.
HW3238C
Power Module
3/16/98
APPLICATIONS INFORMATION
Mounting Considerations
For the HW3238C module, mounting is done by soldering the four "feet" to a suitable heatsink. This can be done
with a low temperature solder which liquefies below 150
¢ J
Under no circumstances should the HW3238C
.
modules be heated to a temperature greater than 165
¢ J
Internal construction of the module has been achieved
.
using 36% lead, 62% tin, 2% Ag solder which liquefies at about 180
¢ J
Also, remember that the modules are
.
NOT hermetic seal.
Nominal Operation
All electrical specifications are based on the nominal conditions of V
DD1,2,3
= 7VDC, V
GG
= -4VDC and linear output
power equal to 24 dBm at 3.4 ~ 3.8 GHz. While the modules are designed to have excess gain margin with
ruggedness, operation of these units outside the published specifications is not recommended unless prior
communications regarding intended use have been made with a factory representative.
Decoupling
External decoupling networks are recommended to ensure stable operation of the device. Pins 2, 3, 4, and 5 are
internally bypassed with a 1000 pF chip capacitor. Additional external decoupling is recommended as shown in
Figure 1. Inadequate decoupling will result in spurious outputs at certain operating frequencies and certain phase
angles of input and output VSWR.
Handling Considerations
GaAs FETs are more sensitive to electrostatic discharge (ESD) than Si bipolar transistors. Therefore, steps should
be taken in handling GaAs products to prevent damage. The use of ground straps, grounded breakers and test
equipment is strongly recommended.
Soldering Leads
Be sure the soldering iron is grounded. Temperature of the iron should not exceed 350
¢ J
.
to be soldered for not more than 5 seconds.
Apply heat to a lead
Load Mismatch
During final test each module is load mismatch tested in a fixture having the identical decoupling networks described
in Figure 1. Electrical conditions are V
DD2
= 8.0Vdc and V
GG1,2
= -4Vdc, Pin at 5 mW, and V
DD1
set for 31.5 dBm
output power and VSWR equal to 20:1.
Biasing and Use Considerations
In all cases, RF input power should not be applied until the bias voltages have been applied, and RF input power
should be turned off prior to removing the bias voltages. Bias application should be timed such that gate voltage
(V
GG1,2
) is always applied before the drain voltages (V
DD
), and when returning to the standby mode, gate voltage should
only be removed once the drain voltages have been removed.
2 Prosperity Road II, Science-Based Industrial Park, Hsinchu, Taiwan TEL 886-3-578-5100
All rights reserved.
Hexawave Inc.
FAX 886-3-577-0512
All specifications are subject to change without notice.
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