ATR4253C Integrated Circuit Solution for Active Antennas DATASHEET Features Highly integrated - All-in-one active antenna IC Operating frequency range: 50MHz to 900MHz Main application 76MHz to 108MHz (broadcast FM worldwide) Integrated AGC Integrated driver for PIN diodes Integrated power supply regulator Integrated antenna sensor High dynamic range Excellent noise performance High intercept point 3rd order RF amplifier adjustable to various cable impedances Low noise output voltage Low power consumption 9265C-AUDR-11/141. Description The Atmel ATR4253C is a highly integrated high-performance IC for active antenna amplification. The device has a built-in AGC, antenna detection, a power supply regulator and two driver stages for external PIN diodes. The Atmel ATR4253C is based on BICMOS technology. The device is designed in particular for car applications and is suitable for active antennas located in several positions within the car such as bumpers, windscreen, mirrors or windows. Figure 1-1. Block Diagram RFB RFE PD2 RFC 12 11 10 9 FM Amplifier 13 8 BIAS DET Voltage Supply 14 7 GND2 TC AGC (FM) 15 6 REF VS Antenna Over 16 5 PD1 GND1 Detection Voltage 1234 ANTENNA VSTART OVDET VREGO SENSE 2 ATR4253C DATASHEET 9265CAUDR11/14