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DATA SHEET
ACA2429: 1218 MHz High-Output GaN CATV Power-Doubler
Amplifier
Applications
Advanced high-power, high-frequency HFC transmission
systems
Output power doubler for deep fiber node in CATV distribution
CATV digital edge QAM output driver
Features
50 to 1218 MHz frequency range
Output power: +59 dBmV
Gain: 25 dB at 1218 MHz
1 dB tilt over bandwidth
Single +24 V supply
Operating current: 430 mA
GaN amplifier technology
Halogen-free/RoHS compliant
Skyworks Green
TM
products are compliant with
all applicable legislation and are halogen-free.
For additional information, refer to Skyworks
Definition of Green
TM
, document number
SQ04–0074.
Description
The ACA2429 is a highly linear, high-output power integrated RF
amplifier designed for CATV head-ends and HFC distribution
systems. The IC consists of two parallel amplifiers that are
optimized for exceptionally low distortion, high-output power, and
high crash-point in a thermally enhanced surface-mount package.
A GaN output stage is incorporated to minimize the operating
(bias) current, thus making this an excellent choice for
environmentally friendly "green" initiatives. The ACA2429
provides high gain over the 50 to 1218 MHz CATV downstream
band, and is cascaded between two transmission line baluns.
A block diagram of the ACA2429 is shown in Figure 1. The device
package and pinout are shown in Figure 2. Signal pin
assignments and functional pin descriptions are described in
Table 1.
RF Input
RF Output
1A 2A
1B 2B
204309-001
Figure 1. ACA2429 Block Diagram
DATA SHEET • ACA2429: 1218 MHz HIGH-OUTPUT GaN CATV POWER DOUBLER AMPLIFIER
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1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GND GND
2BIN
GND
1AIN
GND GND
BIAS 1A
1BOUT
2AIN
1BIN
ISET
2BOUT
2AOUT
BIAS 1B
1AOUT
204309-002
Figure 2. ACA2429 Pinout
(Top View)
Table 1. ACA2429 Signal Pin Descriptions
Pin Name Description Pin Name Description
1 GND Ground 9 GND Ground
2 2AIN Amplifier 2A input 10 1BOUT Amplifier 1B output
3 GND Ground 11 BIAS 1B Bias for 1B amplifier
4 1AIN Amplifier 1A input 12 2BOUT Amplifier 2B output and supply
5 1BIN Amplifier 1B input 13 2AOUT Amplifier 2A output and supply
6 ISET Current adjust 14 BIAS 1A Bias for 1A amplifier
7 2BIN Amplifier 2B input 15 1AOUT Amplifier 1A output
8 GND Ground 16 GND Ground
DATA SHEET • ACA2429: 1218 MHz HIGH-OUTPUT GaN CATV POWER DOUBLER AMPLIFIER
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Electrical and Mechanical Specifications
The absolute maximum ratings of the ACA2429 are provided in
Table 2. Recommended operating conditions are specified in
Table 3, and electrical specifications are provided in Table 4.
Table 2. ACA2429 Absolute Maximum Ratings1
Parameter Minimum Maximum Units
Supply (pins 12 and 13)
0
+28 VDC
Current adjust (pin 6) +4 VDC
RF power at inputs (pins 4 and 5)
+75 dBmV
Case operating temperature (Tc)
-40
+110 °C
Storage temperature -65 +150 °C
Soldering temperature +260 °C
Soldering time 5.0 sec
1 Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other parameters set at
or below their nominal value. Exceeding any of the limits listed here may result in permanent damage to the device.
2 Pins 2, 4, 5, and 7 should be AC coupled. No external DC bias should be applied.
3 Pin 6 should be AC-grounded and/or pulled to ground through a resistor for current control.
4 Pins 10, 11, 14, and 15 should have no other external bias applied.
ESD HANDLING: Although this device is designed to be as robust as possible, electrostatic discharge (ESD) can damage this device.
This device must be protected at all times from ESD when handling or transporting. Static charges may easily produce
potentials of several kilovolts on the human body or equipment, which can discharge without detection.
Industry-standard ESD handling precautions should be used at all times.
Table 3. ACA2429 Recommended Operating Conditions1
Parameter Symbol Min Typ Max Units
RF input/output frequency
f
50 1218 MHz
Supply voltage VDD +24 VDC
Current adjust (pin 15) +1.5 VDC
Case temperature TCASE -40 +100 °C
1 Performance is guaranteed only under the conditions listed in this table.
DATA SHEET • ACA2429: 1218 MHz HIGH-OUTPUT GaN CATV POWER DOUBLER AMPLIFIER
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Table 4. ACA2429 Electrical Specifications1,3,4
(TA = +25 C, VDD = +24 VDC, f = 50 to 1218 MHz, 75 Ω System, Unless Otherwise Noted)
Parameter Symbol Test Condition Min Typ Max Units
Gain3
G
1218 MHz 24.5 25.25 26 dB
Gain flatness to 1218 MHz2,3 ± 0.2 dB
Cable equivalent slope3 1 dB
Noise figure NF 5 dB
Composite triple beat1 CTB -78 -74 dBc
Composite second order1 CSO -66 -64 dBc
Composite intermodulation noise1 CIN -60 -56 dB
Input return loss3 RL -20 -18 dB
Output return loss3 RL -20 -18 dB
Thermal resistance θJC Junction-to-case slug 2.7 3.3 °C/W
Supply current 400 430 470 mA
1 Parts measured with 79 NTSC analog channels plus digital QAM channels to 1000 MHz, +58 dBmV output power and 15.5 dB tilt referenced to 1 GHz.
2 Peak deviation from a straight line between gain value at 50 MHz and 1218 MHz.
3 Measured in application circuit in Figure 3.
4 All specifications as measured on the Evaluation Board.
DATA SHEET • ACA2429: 1218 MHz HIGH-OUTPUT GaN CATV POWER DOUBLER AMPLIFIER
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Evaluation Board Description
The ACA2429 Evaluation Board is used to test the performance of
the ACA2429 device. An Evaluation Board schematic is provided
in Figure 3. Table 5 provides the Bill of Materials (BOM) list for
Evaluation Board components.
Figure 3. ACA2429 Evaluation Board Schematic
DATA SHEET • ACA2429: 1218 MHz HIGH-OUTPUT GaN CATV POWER DOUBLER AMPLIFIER
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Table 5. ACA2429 Evaluation Board Bill of Materials (BOM)
Component Value Mfr Mfr Part Number
C1, C2, C3, C16, C17 0.01 uF Murata GRM155R71H103KA
C4 0.5 pF Murata GRM1555C1HR50BA01D
C5, C8 1.3 pF Murata GRM1555C1H1R3BA01D
C6, C7 270 pF Murata GRM1555C1H271JA01D
C9 0.1 uF Murata GRM1555C1HR104BA01D
C10, C11, C14, C15 4700 pF Murata GRM155R71H472JA01D
C12, C13 150 pF Murata GRM1555C1H151JA01D
C18 0.2 pF Murata GRM1555C1HR20BA01D
C19 68 pF Murata GRM1555C1H680FA01D
C20 47 uF Panasonic ECE-A1HN470UB
L1 1.0 nH Murata LQG15HN1N0SO2D
L2, L3 2.2 nH Murata LQG15HN2N2S02D
L4, L5 470 nH Murata LQH31CNR47M03L
L6, L9 680 nH Allied LS03-R68J-RC
L7, L8 0 Ω KOA Speer RK73Z1ETTP
R1, R4 0 Ω KOA Speer RK73Z1ETTP
R2 1.2 kΩ KOA Speer RK73H1JTTD1201F
R3 DNI DNI DNI
R5 8.25 Ω KOA Speer RK73H1ETTP8R25F
T1 1:1 transformer Minntronix MRF-25001
T2 2:1 transformer Minntronix MRF-27001
U1 ACA2429
PCB 11G21A75_B10
DATA SHEET • ACA2429: 1218 MHz HIGH-OUTPUT GaN CATV POWER DOUBLER AMPLIFIER
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Package Dimensions
The PCB layout footprint drawing for the ACA2429 is shown in
Figure 5. The package dimensions for the ACA2429 are shown in
Figure 6. The tape and reel dimensions are provided in Figure 7.
Package and Handling Information
Since the device package is sensitive to moisture absorption, it is
baked and vacuum packed before shipping. Instructions on the
shipping container label regarding exposure to moisture after the
container seal is broken must be followed. Otherwise, problems
related to moisture absorption may occur when the part is
subjected to high temperature during solder assembly.
The ACA2429 is rated to Moisture Sensitivity Level 2 (MSL2) at
260 C. It can be used for lead or lead-free soldering. For
additional information, refer to the Skyworks Application Note,
Solder Reflow Information, document number 200164.
Care must be taken when attaching this product, whether it is
done manually or in a production solder reflow environment.
Production quantities of this product are shipped in a standard
tape and reel format.
DATA SHEET • ACA2429: 1218 MHz HIGH-OUTPUT GaN CATV POWER DOUBLER AMPLIFIER
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Figure 5. ACA2429 PCB Layout Footprint Dimensions
DATA SHEET • ACA2429: 1218 MHz HIGH-OUTPUT GaN CATV POWER DOUBLER AMPLIFIER
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Figure 6. ACA2429 Package Dimensions
DATA SHEET • ACA2429: 1218 MHz HIGH-OUTPUT GaN CATV POWER DOUBLER AMPLIFIER
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Figure 7. ACA2429 Tape and Reel Dimensions
DATA SHEET • ACA2429: 1218 MHz HIGH-OUTPUT GaN CATV POWER DOUBLER AMPLIFIER
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Ordering Information
Part Number Product Description Packaging
ACA2429P2 16-pin wide body SOIC with heat slug 1500-piece tape and reel
EVB2429 Evaluation Board
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