AFE8220-Q1

AFE8220-Q1 www.ti.com....................................................................................................................................................... SBAS455A – JANUARY 2009 – REVISED JULY 2009 DUAL INTERMEDIATE FREQUENCY (IF) ANALOG FRONT END FOR DIGITAL RADIO FEATURES 1 2345 Qualified for Automotive Applications Two Intermediate Frequency (IF) Analog-to-Digital Converters (ADCs) Two 12-Bit Auxiliary Digital-to-Analog Converters (DACs) Integrated IF Digital Processing Core Integrated Circuitry for Third-Overtone Master Clock Oscillator Wakeup Circuit/Real-Time Clock With Separate Crystal Oscillator Flexible Data Interface Optimized for TMS Family of Digital Baseband Processors Pin-Selectable SPI™ and I2C™ Control Interfaces 3.3-V/1.8-V Supply (Integrated Regulator Available to Optionally Generate 1.8-V Supply) TQFP-100 PowerPAD™ Package APPLICATIONS IF-Sampled AM/FM Radio Hybrid Digital (HD) Digital Audio Broadcasting (DAB) Digital Radio DESCRIPTION The AFE8220 implements the intermediate frequency (IF) sampling and processing functions of a digital radio receiver system. It is designed to be used with TI's digital radio baseband processors and AM/FM tuners. The AFE8220 can also be programmed by the baseband processor for use in conventional AM/FM and digital radio. This unit includes two IF inputs with associated filtering and digital processing circuitry. The receive circuit oversamples the radio tuner IF output to reduce n...