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
