ATR4255P datasheet(1/34 Pages) ATMEL

1 / 34 page

Features

• FM Double-conversion System

• Integrated Second IF Filter with Software-controlled Bandwidth

• Completely Integrated FM Demodulator

• Soft Mute and Multipath Noise Cancellation

• Receiving Condition Analyzer

• AM Up/Down-conversion System

• AM Preamplifier with AGC and Stereo Capability

• 3-wire Bus Controlled

• Search Stop Signal Generation for AM and FM

• Automatic Alignment Possible

• Lead-free Package

Electrostatic sensitive device.

Observe precautions for handling.

1.

Description

The ATR4255P is a highly integrated AM/FM front-end circuit manufactured using

Atmel’s advanced BiCMOS technology. It represents a complete, automatically

adjustable AM/FM front end, containing a double-conversion system for FM and an

up/down-conversion receiver for AM with IF1 = 10.7 MHz and IF2 = 450 kHz. The

front end is suitable for digital or analog AF signal processing. Together with the PLL

ATR4256, an automatically aligned high-performance AM/FM tuner can be built.

These ICs are designed for highly sophisticated car radio applications.

AM/FM

Receiver IC

ATR4255P

Rev. 4883B–AUDR–01/06

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