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Advance Product Information
July 20, 2005
CATV TIA/Gain Block
TGA 2803
Top View Bottom View
TGA2803-SM
Key Features and Performance
* * * * * * * * * * Frequency Range: 40MHz - 1GHz 20 dB Flat Gain 800 Transimpedance * <5pA/ Hz Equivalent Input Noise Current * 1.5 dB 75 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
Product Description
The TriQuint TGA2803-SM is an ultralinear, 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.
Typical 75 : Gain w/External Balun Losses Removed
24
* Includes 1:1 balun, No photodiode or auto-transformer
Primary Applications
* * * HFC Nodes CATV Line Amplifiers Head End Equipment
75 : Output TOI
55
51
OTOI (dBm)
47
43
39
35 0 100 200 300 400 500 600 700 800 900
Frequency (MHz)
Input Referred Current Noise with High Impedance source
6
Gain (dB)
16 12 8 4 0 0 200 400 600 800 1000 1200
Noise Current(pA/rt(Hz))
20
5 4 3 2 1 0 0 2 00 4 00 6 00 8 00 10 00 12 00
Frequency (MHz)
F req u en cy (M H z)
Note: This device is early in the characterization process prior to finalizing all electrical specifications. Specifications are subject to change without notice.
1
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Advance Product Information
July 20, 2005 TGA2803-SM
Table I Maximum Ratings 1/
Symbol
VDD IDD PIN TASSY TSTG TCASE 1/
Parameter
Bias Supply Voltage Bias Supply Current RF Input Power Assembly Temperature (30 seconds max) Storage Temperature Package Operating Temperature (Heat Slug)
Min
0
Max
15 500 77 300
Units
V mA dBmV C C C
Notes
1/ 2/ 3/
-65 -40
150 110
These values reflect maximum operable values for this device. Operating above the recommended values may directly affect MTTF. Total Current Total Input Power
2/ 3/
Table II DC Specifications
Symbol
VDD IDD VG1 VG2 Vout1 Vout2
Parameter
Bias Supply Voltage Bias Supply Current Gate 1 Voltage (Pin 19) Gate 2 Voltage (Pin 7) RF Output 1 Voltage (Pin 14/15) RF Output 2 Voltage (Pin 11/12)
Typ
8 350 0.90 2.66 VDD VDD
Unit
V mA V V V V
2
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Advance Product Information
July 20, 2005 TGA2803-SM
Table III RF Specifications 1/
TA=25C, VDD=8V Symbol
BW S21 GF NF TZ In IP3 IRL ORL ID P1dB 1/ 2/ 3/ 4/
Parameter
Bandwidth Power Gain Gain Flatness Noise Figure Transimpedance Equivalent Input Current Noise Two-Tone, Third-Order Intercept (450 MHz) Input Return Loss Output Return Loss Drain Current Output Power at P1dB (450 MHz)
Min
40
Typ
20 0.3 1.5 800 5 46 16 20 350 27
Max
870
Units
MHz dB dB dB pA/rtHz dBm dB dB mA dBm
Note
2/ 2/ 2/
3/
4/
Using electrical application circuit on pg. 8 1:1 Balun losses have been removed from the measurement Measured with open-circuited input Increasing drain current will improve linearity of device
3
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Advance Product Information
July 20, 2005 TGA2803-SM
Typical Measured S-Parameters (75 : ) Using Application Circuit
(includes effects of external baluns)
0 -4 -8 -12
S11(dB)
-16 -20 -24 -28 -32 -36 -40 0 200 400 600 800 1000 1200
Frequency (MHz)
24 20
0 -5 -10
S21 (dB)
S12 (dB)
16 12 8
-15 -20 -25 -30
4 0 0 200 400 600 800 1000 1200
-35 -40 0 200 400 600 800 1000 1200
Frequency (MHz)
Frequency (MHz)
0 -5 -10
S22 (dB)
-15 -20 -25 -30 -35 -40 0 200 400 600 800 1000 1200
Frequency (MHz)
4
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Advance Product Information
July 20, 2005 TGA2803-SM
Typical Measured Performance Using Application Circuit
(includes effects of external baluns)
55
51
OTOI (dBm)
47
43
39
35 0 100 200 300 400 500 600 700 800 900
Frequency (MHz)
Input balun losses removed
6
5 4.5
Noise Current(pA/rt(Hz))
5
4
Noise Figure(dB)
4 3 2 1 0 0 200 400 600 800 1000 1200
3.5 3 2.5 2 1.5 1 0.5 0 0 200 400 600 800 1000 1200
Frequency (M H z)
Frequency(MHz)
5
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Advance Product Information
July 20, 2005 TGA2803-SM
Mechanical Specifications
6
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Advance Product Information
July 20, 2005 TGA2803-SM
Pinout
TGA 2803
Top Side
Dot indicates Pin 1
Bottom Side
Pin
1 2 3 4 5 6 7 8 9 10
Description
RF Input 1 RF Input 1 GND RF Input 2 RF Input 2 NC VG2 (Optional) VDD VDD (choked) Isense 1/
Pin
11 12 13, 21 14 15 16 17 18 19 20
Description
RF Output 2 RF Output 2 GND RF Output 1 RF Output 1 NC VDD (choked) VDD VG1 (Optional) NC
1/
Bias current monitor: Ibias = VPin 10 /
7
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Advance Product Information
July 20, 2005 TGA2803-SM
Application Diagrams
Electrical Gain Amplifier
Electrical In 75: Electrical Out 75:
Balun
TGA 2803 Push-Pull TIA
Balun
Optical Receiver
Fiber In
Photodiode + Transformer
Balun
TGA 2803 Push-Pull TIA
Electrical Out 75:
Balun
8
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Advance Product Information
July 20, 2005 TGA2803-SM
Recommended Electrical Assembly
+8V C5
L1
RF IN
T1
C1
1 2 3 4 5
20 19 18 17 16
C3
15 14 13 12 11
T2
RF OUT
TGA 2803
C2
6
7
8
9
10
C4
L2
C6
Component Description
Ref
C1 C2 C3 C4 C5 C6 L1 L2 T1 T2 1/
+8V
Description
0.01F Capacitor 0.01F Capacitor 470pF Capacitor 470pF Capacitor 270pF Capacitor 270pF Capacitor 820nH Inductor 820nH Inductor Balun 1/ Balun 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).
9
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Advance Product Information
July 20, 2005 TGA2803-SM
Recommended Electro-Optical Assembly
+8V
Single-Mode Fiber
-15V
L1
C5
PD
RFout
T1
C1 1 2 3 4 5
20 19 18 17 16 TGA 2803
C3 15 14 13 12 11 T2
RF OUT
C2
6 7 8 9 10
C4
Component Description
Ref
C1 C2 C3 C4 C5 C6 L1 L2 T1 T2 PD
L2
C6
Description
0.01F Capacitor 0.01F Capacitor 470pF Capacitor 470pF Capacitor 270pF Capacitor 270pF Capacitor 820nH Inductor 820nH Inductor Balun 1/ Balun 1/ Broadband Photodiode 2/
+8V
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.
10
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com
Advance Product Information
July 20, 2005 TGA2803-SM
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.
Typical Solder Reflow Profiles
Reflow Profile
Ramp-up Rate Activation Time and Temperature Time above Melting Point Max Peak Temperature Time within 5 C of Peak Temperature Ramp-down Rate
SnPb
3 C/sec 60 - 120 sec @ 140 - 160 C 60 - 150 sec 240 C 10 - 20 sec 4 - 6 C/sec
Pb Free
3 C/sec 60 - 180 sec @ 150 - 200 C 60 - 150 sec 260 C 10 - 20 sec 4 - 6 C/sec
Ordering Information
Part
TGA2803-SM
Package Style
QFN 20L 4x4 Surface Mount
GaAs MMIC devices are susceptible to damage from Electrostatic Discharge. Proper precautions should be observed during handling, assembly and test.
11
TriQuint Semiconductor Texas: Phone (972)994-8465 Fax (972)994-8504 Email: Info-mmw@tqs.com Web: www.triquint.com

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