Analog Front-End. AFE8220-Q1 Datasheet

AFE8220-Q1 Front-End. Datasheet pdf. Equivalent

Part AFE8220-Q1
Description Analog Front-End
Feature AFE8220-Q1 www.ti.com...............................................................................
Manufacture etcTI
Datasheet
Download AFE8220-Q1 Datasheet



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 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.
TA
–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



AFE8220-Q1
AFE8220-Q1
SBAS455A – JANUARY 2009 – REVISED JULY 2009....................................................................................................................................................... www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range, unless otherwise noted.(1)
Supply voltage range
Voltage between
Digital inputs(2)
Digital data output
Operating free-air temperature range, TA
Operating junction temperature range, TJ
Storage temperature range, Tstg
AVDD
DVDD
IOVDD
AGND to DGND
AVDD to DVDD
AFE8220I
AFE8220T
AFE8220T
–0.5 V to 3.6 V
–0.5 V to 3.6 V
–0.5 V to 3.6 V
–0.3 V to 0.5 V
–3.3 V to 3.3 V
–0.3 V to DVDD + 0.3 V
–0.3 V to DVDD + 0.3 V
–40°C to 85°C
–40°C to 105°C
–40°C to 125°C
–55°C to 125°C
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) Measured with respect to DGND.
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
AVDD
DVDD
IOVDD
VIH
VIL
TA
TJ
Analog supply voltage
Digital supply voltage
Output driver supply voltage
Input common-mode voltage
Differential input peak-to-peak voltage range
High-level digital input voltage
Low-level digital input voltage
Operating free-air temperature
Operating junction temperature
AFE8220I
AFE8220T
AFE8220T
MIN
3.14
1.6
1.6
0.7 × IOVDD
NOM
3.3
1.8
VCM
2
–40
–40
–40
MAX
3.6
2.0
3.6
0.25 × IOVDD
85
105
125
UNIT
V
V
V
V
V
V
V
°C
°C
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Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): AFE8220-Q1





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