1
TGA4902-SM
April 2012 © Rev C
TriQuint Semiconductor: www. triquint.com (972)994-8465 Fax (972)994-8504 Info-mmw@tqs.com
-25
-20
-15
-10
-5
0
5
10
15
20
25
25 26 27 28 29 30 31 32 33 34 35
Frequency (GHz)
S-Parameter (dB)
Product Description
The TriQuint TGA4902-SM is a Ka-
Band packaged medium Power
Amplifier. The TGA4902-SM operates
from 25-35 GHz and is designed using
TriQuint’s power pHEMT production
process.
The TGA4902-SM typically provides 25
dBm of output power at 1 dB gain
compression, with small signal gain of
18 dB.
The TGA4902-SM is ideally suited for
VSAT ground terminal market, Point-to-
Point Radio, Point-to-Multipoint
Communications.
Evaluation Boards are available.
Lead-free and RoHS compliant.
Primary Applications
•Ka-Band VSAT
•Point-to-Point Radio
•Point-to-Multipoint Communications
Preliminary Measured Data
Bias Conditions: Vd = 6 V, Id = 220 mA, Tuned
ORL
Gain
IRL
Key Features
•Typical Frequency Range: 25 - 35 GHz
•25 dBm Nominal P1dB
•18 dB Nominal Gain
•Bias 6 V, 220 mA
•Package Dimensions:
4.0 x 4.0 x 0.9 mm
15
17
19
21
23
25
27
25 26 27 28 29 30 31 32 33 34 35
Frequency (GHz)
P1dB (dBm)
Ka Band Packaged MPA
Datasheet subject to change without notice
2
TGA4902-SM
April 2012 © Rev C
TriQuint Semiconductor: www. triquint.com (972)994-8465 Fax (972)994-8504 Info-mmw@tqs.com
TABLE I
MAXIMUM RATINGS 1/
SYMBOL PARAMETER VALUE NOTES
Vd
Drain Voltage 8 V 2/
Vg
Gate Voltage Range -5 TO 0 V
Id
Drain Current 296 mA 2/ 3/
⏐Ig⏐ Gate Current 8.8 mA 3/
P
IN
Input Continuous Wave Power 20 dBm
P
D
Power Dissipation 1.89 W 2/ 4/
T
CH
Operating Channel Temperature 200 °C 5/ 6/
Mounting Temperature (30 Seconds) 260 °C
T
STG
Storage Temperature -65 to 150 °C
1/ These ratings represent the maximum operable values for this device.
2/ Combinations of supply voltage, supply current, input power, and output power shall not exceed P
D
.
3/ Total current for the entire MMIC.
4/ When operated at this bias condition with a base plate temperature of 85 °C, the median life is
2.3E4 hours
5/ Junction operating temperature will directly affect the device median time to failure (Tm). For
maximum life, it is recommended that junction temperatures be maintained at the lowest possible
levels.
6/ These ratings apply to each individual FET.
3
TGA4902-SM
April 2012 © Rev C
TriQuint Semiconductor: www. triquint.com (972)994-8465 Fax (972)994-8504 Info-mmw@tqs.com
TABLE II
ELECTRICAL CHARACTERISTICS
(Ta = 25 0C, Nominal)
PARAMETER TYPICAL UNITS
Frequency Range 25 - 35 GHz
Drain Operating 6 V
Quiescent Current 220 mA
Small Signal Gain 18 dB
Input Return Loss 15 dB
Output Return Loss 10 dB
Output Power @ 1 dB Compression Gain 25 dBm
Temperature Coefficient -0.017 dB/0C
4
TGA4902-SM
April 2012 © Rev C
TriQuint Semiconductor: www. triquint.com (972)994-8465 Fax (972)994-8504 Info-mmw@tqs.com
TABLE III
THERMAL INFORMATION
PARAMETER TEST
CONDITIONS
T
CH
(°C)
θ
JC
(°C/W)
Tm
(HRS)
θ
JC
Thermal Resistance
(channel case)
Vd = 6 V
I
D
= 220 mA
Pdiss = 1.32 W
150
60.7
1.0E+6
Note: Worst case condition with no RF applied, 100% of DC power is dissipated, Case
Temperature @ 70 °
C
Median Lifetime (Tm) vs. Channel Temperature
5
TGA4902-SM
April 2012 © Rev C
TriQuint Semiconductor: www. triquint.com (972)994-8465 Fax (972)994-8504 Info-mmw@tqs.com
15
16
17
18
19
20
21
22
23
24
25
26
27
25 26 27 28 29 30 31 32 33 34 35
Fre
q
uenc
y
(
GHz
)
P1dB (dBm)
Preliminary Measured Data
Bias Conditions: Vd = 6 V, Id =220 mA, Tuned
0
2
4
6
8
10
12
14
16
18
20
22
24
26
20 22 24 26 28 30 32 34 36 38 40
Frequency (GHz)
Gain (dB)
6
TGA4902-SM
April 2012 © Rev C
TriQuint Semiconductor: www. triquint.com (972)994-8465 Fax (972)994-8504 Info-mmw@tqs.com
Preliminary Measured Data
Bias Conditions: Vd = 6 V, Id =220 mA
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
20 22 24 26 28 30 32 34 36 38 4
0
Frequency (GHz)
Input Return Loss (dB)
Tuned
*
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
20 22 24 26 28 30 32 34 36 38 40
Frequency (GHz)
Output Return Loss (dB)
Tuned
*
* As build performance without tuning stubs
7
TGA4902-SM
April 2012 © Rev C
TriQuint Semiconductor: www. triquint.com (972)994-8465 Fax (972)994-8504 Info-mmw@tqs.com
Package Pinout Diagram
Pin Description
1, 5, 6, 10, 11, 15, 16, 20, 21 GND
2, 4, 7, 12, 14, 19 NC
3 RF Input
8Vg1
9Vg2
13 RF Output
17 Vd1
18 Vd2
Bottom ViewTop View
Dot indicates Pin 1
TGA
4902
Date Code
Lot Code
8
TGA4902-SM
April 2012 © Rev C
TriQuint Semiconductor: www. triquint.com (972)994-8465 Fax (972)994-8504 Info-mmw@tqs.com
GaAs MMIC devices are susceptible to damage from Electrostatic Discharge. Proper precautions should
be observed during handling, assembly and test.
Mechanical Drawing
Units: Millimeters
9
TGA4902-SM
April 2012 © Rev C
TriQuint Semiconductor: www. triquint.com (972)994-8465 Fax (972)994-8504 Info-mmw@tqs.com
Recommended Board Layout Assembly
100pF
Tuning
100pF
10 Ohm
1 uF
Vg ~ -0.6V
to get 220mA Id
Tuning
Vd = 5-6V
1 uF
10 Ohm
10
TGA4902-SM
April 2012 © Rev C
TriQuint Semiconductor: www. triquint.com (972)994-8465 Fax (972)994-8504 Info-mmw@tqs.com
Ordering Information
Part Package Style
TGA4902-SM QFN 4x4 Surface Mount
Recommended Surface Mount Package Assembly
Proper ESD precautions must be followed while handling packages.
TriQuint recommends using a conductive solder paste for attachment. Follow solder paste and reflow oven
vendors’ recommendations when developing a solder reflow profile. Typical solder reflow profiles are listed
in the table below.
Hand soldering is not recommended. Solder paste can be applied using a stencil printer or dot placement.
The volume of solder paste depends on PCB and component layout and should be well controlled to
ensure consistent mechanical and electrical performance.
Solder attach process requires the use of no clean flux.
This part is not rated for high moisture environments.
Typical Solder Reflow Profiles
Reflow Profile SnPb Pb Free
Ramp-up Rate 3 °C/sec 3 °C/sec
Activation Time and
Temperature 60 – 120 sec @ 140 – 160 °C 60 – 180 sec @ 150 – 200 °C
Time above Melting Point 60 – 150 sec 60 – 150 sec
Max Peak Temperature 240 °C 260 °C
Time within 5 °C of Peak
Temperature 10 – 20 sec 10 – 20 sec
Ramp-down Rate 4 – 6 °C/sec 4 – 6 °C/sec