Atmel has developed a new active antenna IC for FM car antennas, car radios and navigation applications.
Addressing the broad operating frequency range up to 790 MHz, these antennas also cover regional broadcast systems including DMB in Korea, DVB-T in Europe and US and ISDB-T in Japan.
The new ATR4253 provides extended integration to include an automatic gain control, supply voltage regulator with over-voltage protection and an antenna sensor in a 3 x 3 mm footprint. The device enables designers to develop small, high-performance antenna solutions located in the car mirror, bumper, rear or side windows. The antenna detection functionality is also suitable for modern window or glass antennas, and the robust IC addresses other antenna types including pole or shark fin antennas.
Due to its impressive noise performance, the ATR4253 can also be designed as a preamplifier for car radios or navigation applications which require FM-RDS information. The device is equipped with a range of features including voltage regulation (important function when an unstabilised phantom feed is used), ESD protection and a robust ambient temperature capability of up to 115°C.
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