AFE8220-Q1 Datasheet, PDF (1/49 Pages) Texas Instruments – DUAL INTERMEDIATE FREQUENCY (IF) ANALOG FRONT END FOR DIGITAL RADIO

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 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.
T_A
–40°C to 85°C
–40°C to 105°C
ORDERING INFORMATION⁽¹⁾
PACKAGE ⁽²⁾
ORDERABLE PART NUMBER
HTQFP – PZP
Tray of 90
AFE8220IPZPQ1
AFE8220TPZPQ1
TOP-SIDE MARKING
AFE8220Q
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.
PowerPAD is a trademark of Texas Instruments.
2
SPI is a trademark of Motorola, Inc.
3
I2C is a trademark of NXP Semiconductors.
4
All other trademarks are the property of their respective owners.
5
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009, Texas Instruments Incorporated