ATR4252

www.DataSheet4U.com Features Highly Integrated - All-in-one Active Antenna IC Integrated AGC for AM and FM Integrated Driver for AM and FM PIN Diodes Integrated Power Supply Regulator Integrated Antenna Sensor Separated AM LNA, AM Buffer and FM Amplifier High Dynamic Range for AM and FM Excellent Noise Performance High Intercept Point 3rd Order for FM FM Amplifier Adjustable to Various Cable Impedances High Intercept Point 2nd and 3rd Order for AM Low Noise Output Voltage Low Power Consumption Low Output Impedance AM Only Small Capacitor Values Necessary at AM AGC Large AM Frequency Range to Cover DRM Broadcast Signals All-in-One IC Solution for Active Antennas ATR4252 Summary Preliminary 1. Description The ATR4252 is a highly integrated high performance AM/FM antenna amplification IC with several features. The device has built-in AGC's for both AM and FM, antenna detection, a power supply regulator as well as additional pre-integrated peripherals. The ATR4252 is based on BICMOS technology. The device is designed in particular for car application and is suitable for active antennas located in several positions on the car such as bumpers, windscreen, mirrors or windows. Figure 1-1. Block Diagram AM LNA BIAS 22 REF 21 AMPD 20 GND2 19 FM BIAS 18 FMB 17 FME 16 FMPD 15 AM LNA IN AM LNA SOURCE 23 AM LNA FM Amplifier 14 FMC 24 Voltage Supply AGC (FM) 13 FMDET CASCODE 25 FILTER 26 12 FMTC AM LNA OUT 11 VS AMBIAS 27 Antenna Detect A...