Data Sheet

ADCA3280

DOCSIS 4.0, 24 V Power Doubler Amplifier, 45 MHz to 1794 MHz

Rev. 0

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FEATURES

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Excellent linearity for TCP up to 75 dBmV

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Power gain: 22.7 dB at 1794 MHz

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S11: <−17 dB from 108 MHz to 1794 MHz

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S22: <−19 dB from 108 MHz to 1794 MHz

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Flexible supply voltage range: 24 V to 18 V

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Adjustable supply current: 570 mA to 450 mA

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Internal precision voltage reference to improvement current sta-

bility over process and temperature

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Internal temperature monitor

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Industry standard, 9-terminal, 9 mm x 8 mm LGA_CAV, surface-

mounted package

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Excellent thermal conductivity

APPLICATIONS

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258 MHz to 1794 MHz extended spectrum CATV infrastructure

amplifier systems

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108 MHz to 1218 MHz CATV infrastructure amplifier systems

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Remote nodes

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DOCSIS 3.1 and 4.0 compliant

FUNCTIONAL BLOCK DIAGRAM

Figure 1. Functional Block Diagram

GENERAL DESCRIPTION

The ADCA3280 is a power doubler with 22.7 dB of power gain

at 1794 MHz designed for operation in 24 V applications. The am-

plifier can also be operated with a lower supply voltage, providing

superior efficiency as seen in Figure 10, Figure 17, and Figure 20.

The device achieves high RF output up to 75 dBmV total composite

power (TCP) with excellent noise power ratio (NPR), or equivalently

modulation error ratio (MER), with channel loading to 1.8 GHz as

well as 1.2 GHz, making it an ideal output stage device for DOC-

SIS 4.0 as well as DOCSIS 3.1 equipment. The DC current and

supply voltage can be adjusted externally for optimum distortion

performance vs. power consumption over a range of output levels.

The ADCA3280 provides high performance, simplifying the design

and manufacturing of DOCSIS 3.1 and DOCSIS 4.0 infrastructure

equipment.

The ADCA3280 is packaged in an industry standard 9-terminal, 9

mm x 8 mm LGA package.