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AFE8220-Q1

更新时间： 2024-09-19 12:21:31
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德州仪器 - TI /
页数 文件大小 规格书
49页 874K
描述
DUAL INTERMEDIATE FREQUENCY (IF) ANALOG FRONT END FOR DIGITAL RADIO

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AFE8220-Q1  
www.ti.com....................................................................................................................................................... SBAS455A–JANUARY 2009–REVISED JULY 2009  
DUAL INTERMEDIATE FREQUENCY (IF) ANALOG FRONT END FOR DIGITAL RADIO  
1
FEATURES  
2345  
•
Qualified for Automotive Applications  
•
•
•
•
Flexible Data Interface Optimized for TMS  
Family of Digital Baseband Processors  
Pin-Selectable SPI™ and I2C™ Control  
Interfaces  
•
Two Intermediate Frequency (IF)  
Analog-to-Digital Converters (ADCs)  
•
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  
APPLICATIONS  
•
•
•
Wakeup Circuit/Real-Time Clock With Separate  
Crystal Oscillator  
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.  
ORDERING INFORMATION(1)  
TA  
PACKAGE(2)  
ORDERABLE PART NUMBER  
AFE8220IPZPQ1  
TOP-SIDE MARKING  
AFE8220Q  
AFE8220QT  
–40°C to 85°C  
–40°C to 105°C  
HTQFP – PZP  
Tray of 90  
AFE8220TPZPQ1  
(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
3
4
5
PowerPAD is a trademark of Texas Instruments.  
SPI is a trademark of Motorola, Inc.  
I2C is a trademark of NXP Semiconductors.  
All other trademarks are the property of their respective owners.  
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  
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