MAX2180

AM/FM Antenna Low-Noise Amplifier

Industry-Leading AM/FM LNA with Adjustable Gain Control Saves Space, Cost and Improves Functionality

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Overview

+8V to +24V Supply Voltage Range
Integrated AGC Function Eliminates External Pin Diodes
High Dynamic Range
Low-Noise Design
Low External BOM
Integrated Thermal Protection
Small Package (4mm x 4mm TQFN)

The MAX2180 is a highly integrated AM/FM variable-gain low-noise amplifier ideal for use in automotive active antenna applications. The device features separate AM and FM signal paths, each providing 30dB of gain range, controlled by individual on-chip power detectors. The AM signal path covers a 148kHz to 30MHz input frequency range, while the FM signal path covers 65MHz to 162.5MHz.

The device integrates a voltage regulator and pass transistor, allowing operation using battery voltages in the +8V to +24V range. On-chip thermal protection automatically limits junction temperatures during extreme thermal conditions.

The device is available in a small, 4mm x 4mm, TQFN package and operates over the extended industrial temperature range (-40°C to +85°C).

Applications