9265C-AUDR-11/14
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
ATR4253C
Integrated Circuit Solution for Active Antennas
DATASHEET
ATR4253C [DATASHEET]
9265C–AUDR–11/14
2
1. 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
1234
OVDET VREGOVSTARTANTENNA
SENSE
13
14
15
16
PD1
BIAS
GND2
REF
8
7
6
5
DET
GND1
VS
TC
12
11 10
RFCPD2RFERFB
9
FM
Amplifier
Voltage
Supply
AGC
(FM)
Over
Voltage
Antenna
Detection