Product Data Sheet
January 15, 2008
1
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
CATV TIA/Gain Block
TGA2803-SM
Key Features and Performance
•
Frequency Range: 40MHz -
1GHz
•
20 dB Flat Gain
•
800 Ω
Transimpedance
*
•
<5pA/ √Hz
Equivalent Input Noise
Current *
•
1.5 dB 75 Ω
Noise Figure
•
Ultra-Low Distortion (45dBm IP3 typ.)
•
Low DC Power Consumption
•
Single Supply Bias (+8V)
•
Proven GaAs Technology
•
20L Package Dimension: 4.0 x 4.0 x 0.9
mm
*
Includes 1:1 balun, No photodiode or auto-
transformer
Product Description
The TriQuint TGA2803-SM is an ultra-
linear, packaged TIA/Gain Block
which operates from 40MHz to
1000MHz.
The TGA2803-SM typically provides
flat gain along with ultra-low distortion.
It also provides high output power with
low DC power consumption.
This amplifier is ideally suited for use
in CATV distribution systems or other
applications requiring extremely low
noise and distortion.
Demonstration Boards are available.
Lead-free and RoHS
compliant.
Bottom ViewTop View
Primary Applications
•
HFC Nodes
•
CATV Line Amplifiers
•
Head End Equipment
0
4
8
12
16
20
24
0 200 400 600 800 1000 1200
Frequency (MHz)
Gain (dB)
Typical 75 ΩGain
w/External Balun Losses Removed
75 Ω
Output TOI
35
39
43
47
51
55
0 100 200 300 400 500 600 700 800 900
Frequency (MHz)
OTOI (dBm)
Input Referred Current Noise
with High Impedance source
0
1
2
3
4
5
6
0 200 400 600 800 1000 1200
Frequency (MHz)
Noise Current(pA/rt(Hz))
TGA
2803
Product Data Sheet
January 15, 2008
2
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
TGA2803-SM
Table II
DC Specifications
Symbol Parameter Typ Unit
VDD Bias Supply Voltage 8 V
IDD Bias Supply Current 350 mA
VG1 Gate 1 Voltage (Pin 19) 0.90 V
VG2 Gate 2 Voltage (Pin 7) 2.66 V
Vout1 RF Output 1 Voltage (Pin 14/15) VDD V
Vout2 RF Output 2 Voltage (Pin 11/12) VDD V
Table I
Maximum Ratings 1/
Symbol Parameter Min Max Units Notes
V
DD
Bias Supply Voltage 0 15 V
I
DD
Bias Supply Current 500 mA 1/ 2/
P
IN
RF Input Power 77 dBmV 3/
T
ASSY
Assembly Temperature (30 seconds max) 260 °C
T
CH
Channel Temperature 150 °C
T
STG
Storage Temperature -65 150 °C
1/ These values reflect maximum operable values for this device. Operating above the
recommended values may directly affect T
m
.
2/ Total Current
3/ Total Input Power
Product Data Sheet
January 15, 2008
3
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Table III
RF Specifications 1/
T
A
=25°C, V
DD
=8V
Symbol Parameter Min Typ Max Units Note
BW
Bandwidth 40 1000 MHz
S
21
Power Gain 17 20 26 dB 2/
GF Gain Flatness ± 0.3 dB 2/
NF
Noise Figure 1.5 dB 2/
TZ
Transimpedance 800
Ω
I
n
Equivalent Input Current Noise 5 pA/rtHz 4/
IP
3
Two-Tone, Third-Order Intercept (450 MHz) 46 dBm
IP
3
Two-Tone, Third-Order Intercept (750 MHz) 39 42 dBm 2/ 3/
Harmonics (2
nd
, 3
rd
, 4
th
) (40 to 500MHz) -64 -58 dBc 5/
IRL Input Return Loss 16 dB
ORL Output Return Loss 20 dB
I
D
Drain Current 350 500 mA 6/
P_sat
Saturated Output Power (750 MHz) 26 28 dBm
1/ Using electrical application circuit on pg. 8
2/ 1:1 Balun losses have been removed from the measurement
3/ Measured at 16dBm output power per tone
4/ Measured with open-circuited input
5/ Measured at 15dBm fundamental frequency output power
6/ Increasing drain current will improve linearity of device
TGA2803-SM
TABLE IV
THERMAL INFORMATION
Parameter Test Conditions
T
CH
(
o
C)
θ
JC
(°C/W)
T
M
(HRS)
θ
JC
Thermal Resistance
(channel to backside of
package)
Vd = 8 V
Id = 350 mA
Pdiss = 2. 8 W
128
15.4
7.2 E+6
Note: Worst case condition with no RF applied, 100% of DC power is
dissipated. Package backside temperature @ 85 °C
Product Data Sheet
January 15, 2008
4
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Typical Measured S-Parameters (75 Ω
)
Using Application Circuit
(includes effects of external baluns)
-40
-36
-32
-28
-24
-20
-16
-12
-8
-4
0
0 200 400 600 800 1000 1200
Frequency (MHz)
S11(dB)
0
4
8
12
16
20
24
0 200 400 600 800 1000 1200
Frequency (MHz)
S21 (dB)
-40
-35
-30
-25
-20
-15
-10
-5
0
0 200 400 600 800 1000 1200
Frequency (MHz)
S12 (dB)
-40
-35
-30
-25
-20
-15
-10
-5
0
0 200 400 600 800 1000 1200
Frequency (MHz)
S22 (dB)
TGA2803-SM
Product Data Sheet
January 15, 2008
5
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
0
1
2
3
4
5
6
0 200 400 600 800 1000 1200
Frequency (MHz)
Noise Current(pA/rt(Hz))
Typical Measured Performance
Using Application Circuit
(includes effects of external baluns)
35
39
43
47
51
55
0 100 200 300 400 500 600 700 800 900
Frequency (MHz)
OTOI (dBm)
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0 200 400 600 800 1000 1200
Frequency(MHz)
Noise Figure(dB)
Input balun
losses removed
TGA2803-SM
Product Data Sheet
January 15, 2008
6
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Mechanical Specifications
TGA2803-SM
Product Data Sheet
January 15, 2008
7
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Pinout
Top Side
Dot indicates Pin 1
Bottom Side
Pin Description Pin Description
1
RF Input 1 11 RF Output 2
2
RF Input 1 12 RF Output 2
3 GND 13, 21 GND
4
RF Input 2 14 RF Output 1
5
RF Input 2 15 RF Output 1
6
NC 16 NC
7
VG2 (Optional) 17 VDD (choked)
8 VDD 18 VDD
9 VDD (choked) 19 VG1 (Optional)
10 Isense 1/ 20 NC
TGA
2803
TGA2803-SM
1/
Bias current monitor: I_sense
= (Voltage_pin
10) / 4Ω
Product Data Sheet
January 15, 2008
8
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Optical Receiver
Electrical Gain Amplifier
Balun
TGA 2803
Push-Pull
TIA
Balun
Electrical Out
75Ω
Electrical In
75Ω
TGA2803-SM
Application Diagrams
Fiber In
Balun Balun
Electrical Out
75Ω
Photodiode
+
Transformer
TGA 2803
Push-Pull
TIA
Product Data Sheet
January 15, 2008
9
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Recommended Electrical Assembly
Component Description
Ref Description
C1 0.01μF Capacitor
C2 0.01μF Capacitor
C3 470pF Capacitor
C4 470pF Capacitor
C5 270pF Capacitor
C6 270pF Capacitor
L1 820nH Inductor
L2 820nH Inductor
T1 Balun 1/
T2 Balun 1/
1/ Balun performance impacts amplifier return losses and gain. Best performance can be
achieved by winding 34 or 36 gauge bifilar wire around a small binocular core made
from low-loss magnetic material. Suitable wire may be obtained from MWS Wire
Industries. Core vendors include Ferronics, Fairrite, TDK, and Micrometals.
Alternatively, off-the-shelf baluns can be purchased from a number of vendors
including Mini-Circuits (ADTL1-18-75), M/A-COM (ETC1-1-13), and Pulse Engineering
(CX2071).
+8V
+8V
RF
OUT
TGA 2803
1
2
3
4
5
15
14
13
12
11
6 7 8 9 10
20 19 18 17 16
RF
IN T1
T2
L1
C2
C3
C4
C5
C6
C1
L2
TGA2803-SM
Product Data Sheet
January 15, 2008
10
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Component Description
Ref Description
C1 0.01μF Capacitor
C2 0.01μF Capacitor
C3 470pF Capacitor
C4 470pF Capacitor
C5 270pF Capacitor
C6 270pF Capacitor
L1 820nH Inductor
L2 820nH Inductor
T1 Balun 1/
T2 Balun 1/
PD Broadband
Photodiode 2/
1/ Balun performance impacts amplifier return losses and gain. Best
performance can be achieved by winding 34 or 36 gauge bifilar wire
around a small binocular core made from low-loss magnetic material.
Suitable wire may be obtained from MWS Wire Industries. Core vendors
include Ferronics, Fairrite, TDK, and Micrometals.
Alternatively, off-the-shelf baluns can be purchased from a number of
vendors including Mini-Circuits (ADTL1-18-75), M/A-COM (ETC1-1-13),
and Pulse Engineering (CX2071).
2/ Emcore 2609C Broadband Photodiode Module is recommended. The
module includes a 4:1 impedance transformer.
Recommended Electro-Optical Assembly
+8V
Single-Mode
Fiber
PD
-15V
RFout
+8V
RF
OUT
TGA 2803
1
2
3
4
5
15
14
13
12
11
6 7 8 9 10
20 19 18 17 16
T1
T2
L1
C2
C3
C4
C5
C6
C1
L2
TGA2803-SM
Product Data Sheet
January 15, 2008
11
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Ordering Information
Part Package Style
TGA2803-SM QFN 20L 4x4 Surface Mount
Recommended Surface Mount Package Assembly
Proper ESD precautions must be followed while handling packages.
Clean the board with acetone. Rinse with alcohol. Allow the circuit to fully dry.
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.
Clean the assembly with alcohol.
GaAs MMIC devices are susceptible to damage from Electrostatic Discharge. Proper precautions should
be observed during handling, assembly and test.
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
TGA2803-SM
