1

FEATURES

APPLICATIONS

DESCRIPTION

AFE8220-Q1

DUAL INTERMEDIATE FREQUENCY (IF) ANALOG FRONT END FOR DIGITAL RADIO

2345

• Qualified for Automotive Applications

• Flexible Data Interface Optimized for TMS

Family of Digital Baseband Processors

• Two Intermediate Frequency (IF)

Analog-to-Digital Converters (ADCs)

Interfaces

• Two 12-Bit Auxiliary Digital-to-Analog

Converters (DACs)

• 3.3-V/1.8-V Supply (Integrated Regulator

Available to Optionally Generate 1.8-V Supply)

• Integrated IF Digital Processing Core

• TQFP-100 PowerPAD™ Package

• Integrated Circuitry for Third-Overtone Master

Clock Oscillator

• Wakeup Circuit/Real-Time Clock With Separate

• IF-Sampled AM/FM Radio

Crystal Oscillator

• Hybrid Digital (HD) Digital Audio Broadcasting

(DAB) Digital Radio

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 noise and improve dynamic range. The IF

analog-to-digital converter (ADC) oversamples the IF input at rates up to 75 MHz. the AFE8220 then digitally

mixes, filters, and decimates the signal to provide in-phase (I) and quadrature (Q) output signals to the baseband

processor. A clock oscillator circuit is provided that can be used with an appropriate third-overtone crystal and

external tank circuit to generate the sampling clock for the IF ADCs.

The AFE8220 also includes a real-time clock and associated low-power oscillator circuit. Two auxiliary

digital-to-analog converters (DACs) are included for system control functions. Other features include eight

general-purpose input/output (GPIO) lines and programmable interrupt generators.

The AFE8220 is available in a TQFP-100 (14 mm × 14 mm) package and uses a 3.3-V and a 1.8-V power

supply. An onboard voltage regulator is included to optionally generate the 1.8-V digital supply for the AFE8220.

ORDERABLE PART NUMBER

TOP-SIDE MARKING

–40°C to 85°C

AFE8220IPZPQ1

AFE8220Q

HTQFP – PZP

Tray of 90

–40°C to 105°C

AFE8220TPZPQ1

AFE8220QT

(1)

For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

web site at www.ti.com.

(2)

Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

PowerPAD is a trademark of Texas Instruments.

3

SPI is a trademark of Motorola, Inc.

4

I2C is a trademark of NXP Semiconductors.

5

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2009, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.