Maxim Integrated Products has a low-noise amplifier (LNA) with integrated automatic gain control (AGC) for automotive antenna applications.

The CMOS amplifier accepts separate AM and FM signal paths and delivers 30dB of gain range to each.

The MAX2180 is designed to operate from 148kHz to 162.5MHz.

The self-controlled AGC loop includes on-chip power detectors to ensure that the signal level within each channel is continually optimised to negate the effects of antenna mobility.

This design eliminates the need for external PIN diodes and associated driver circuits, said the supplier.

A voltage regulator and pass transistor provide a stable supply over a wide 8V to 24V voltage range.

A wide voltage range can be particularly useful in applications such as hybrid or electric vehicles where sudden swings in supply are common.

www.maxim-ic.com