AM/FM Car Antenna Low-Noise Amplifier

The MAX2180A 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 +6V 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

* Automotive Active Antenna

* +6V to +24V Supply Voltage Range

* Integrated AGC Function Eliminates External Pin Diodes

* High Dynamic Range

* Low-Noise Sub 3dB Noise Figure

* Low External BOM

* Integrated Thermal Protection

* Small Package (4mm x 4mm TQFN)

* Integrated Pass Device and Linear Regulator

* Integrated Power Detector

* Integrated Antenna Sense