ADCA3270

Data Sheet

Rev. 0 | Page 10 of 14

THEORY OF OPERATION

The ADCA3270 is a balanced amplifier packaged in a LGA_CAV.

The application circuit interfaces the ADCA3270 to a 75 Ω input

and output matched impedance consistent with a matched

module designed for CATV applications. The ADCA3270

uses cascode field effect transistor (FET) feedback amplifiers

in a Class A push pull configuration. The bottom half of the

cascode stages are implemented in a single die, linear FET process

that minimizes parasitics, thereby enabling higher gain. The

top devices in the cascodes are implemented using a linear

GaN process that is able to swing high RF voltages. The

frequency of operation is from 45 MHz to 1218 MHz.

The ADCA3270 is unconditionally stable for robust operation in

systems targeting DOCSIS 3.1 and legacy DOCSIS standards.

75Ω

75Ω

ADCA3270

Figure 15. Simplified Schematic