Digital Downconverter. AFE8201 Datasheet

AFE8201 Downconverter. Datasheet pdf. Equivalent

Part AFE8201
Description IF Analog-to-Digital Converter with Digital Downconverter
Feature AFE8201 SBWS016A − OCTOBER 2003 − REVISED JANUARY 2005 IF Analog-to-Digital Converter with Digital .
Manufacture Burr-Brown Corporation
Datasheet
Download AFE8201 Datasheet



AFE8201
AFE8201
SBWS016A − OCTOBER 2003 − REVISED JANUARY 2005
IF Analog-to-Digital Converter
with Digital Downconverter
FEATURES
D 12-BIT, 80MSPS ADC
D INTEGRATED DIGITAL DOWNCONVERTER (DDC):
Quadrature Mixer/NCO
CIC Decimation Filter
FIR Filters
D MIXER: 32-BIT FREQUENCY AND PHASE
D DECIMATION RATIO: 32 to 4096
D USER PROGRAMMABLE FIR FILTERS WITH
16-BIT COEFFICIENTS
D 12-BIT AUXILIARY DAC
D DATA INTERFACE COMPATIBLE WITH TI C5x/C6x
DSP BUFFERED SERIAL PORT (McBSP):
Code Composer Module for Easy Software
Generation
D SPICONTROL INTERFACE
D 3.3V ANALOG, 1.8V DIGITAL SUPPLY
D 1.8V to 3.3V I/O SUPPLY
D TQFP-48
APPLICATIONS
D SOFTWARE RADIOS
D IF RECEIVE CHANNEL
D DIGITAL RADIO RECEIVERS
D NARROWBAND RECEIVERS
DESCRIPTION
The AFE8201 consists of a general-purpose, 80MSPS,
12-bit analog-to-digital converter (ADC), a digital
downconverter (DDC), and user-programmable digital
filters. It is designed to sample narrowband (2.5MHz or
less) IF signals and digitally mix, filter, and decimate the
signals to baseband.
The DDC consists of a digital quadrature mixer followed
by a CIC decimation filter and FIR filters. The mixer
frequency and initial phase are independently
programmed by 32-bit control words.
After the CIC filter, the internal I and Q signals are
passed on to the first FIR filter, which can implement
even, odd, halfband, and arbitrary impulse responses
with up to 62 taps using 16-bit coefficients.
Following the first FIR filter are two parallel FIR filters
that can be used to provide two output streams or
interleaved to form one extended filter with up to 262
taps. The AFE8201 also contains a 12-bit
general-purpose auxiliary digital-to-analog converter
(DAC) for applications such as AGC amplifier control.
Control register data as well as decimation filter
coefficients are written to the AFE8201 through the
industry-standard SPI control interface. The baseband
output signals are transported through a general-
purpose, high-speed serial interface that is compatible
with TI C5x/C6x DSP family buffered serial ports
(McBSP).
IFP
IFM
12−Bit
Pipeline
ADC
Quadrature
Mixer
CIC Filter
N
FIR Filter 1
2
NCO
AUX
Auxiliary
DAC
Voltage
Reference
Clock
Interface
Timing
Generator
FIR Filter 2A
2
FIR Filter 2B
2
SPI Control
Interface
DOUT0
DOUT1
DFSO
DCLK
DIN
DFSI
REFM VCM REFP VGB
MCLK MCLKB PWD SYNC RST_N SCK MOSI MISO CS_N
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.
All trademarks are the property of their respective owners.
PRODUCT PREVIEW information concerns products in the formative or design
phase of development. Characteristic data and other specifications are design
goals. Texas Instruments reserves the right to change or discontinue these
products without notice.
www.ti.com
Copyright 2003−2005, Texas Instruments Incorporated



AFE8201
AFE8201
SBWS016A − OCTOBER 2003 − REVISED JANUARY 2005
www.ti.com
ORDERING INFORMATION(1)
PRODUCT
PACKAGE-LEAD
PACKAGE
DESIGNATOR
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
MARKING
ORDERING TRANSPORT MEDIA,
NUMBER
QUANTITY
AFE8201
TQFP-48
AFE8201PFBT Tape and Reel, 250
PFB
−40°C to +85°C
AFE8201
AFE8201PFBR Tape and Reel, 2000
(1) For the most current package and ordering information, see the Package Option Addendum located at the end of this data sheet, or see the
TI web site at www.ti.com.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted(1)
Supply Voltage Range:
AVDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5V to 4V
DVDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5V to 2.3V
IOVDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5V to 3.6V
Voltage Between AGND and DGND . . . . . . . . . . . . . −0.3V to 0.5V
Voltage Between AVDD to DVDD . . . . . . . . . . . . . . . −3.3V to 3.3V
Digital Inputs(2) . . . . . . . . . . . . . . . . . . . . . . . −0.3V to DVDD + 0.3V
Digital Output Data . . . . . . . . . . . . . . . . . . . . −0.3V to DVDD + 0.3V
Operating Free-Air Temperature Range. TA . . . . . . −40°C to 85°C
Storage Temperature Range . . . . . . . . . . . . . . . . . −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; functional operation of the device at these or any
other conditions beyond those indicated under the
Recommended Operating Conditions is not implied. Exposure to
absolute-maximum-ratedconditions for extended periods may
affect device reliability.
(2) Measured with respect to DGND.
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.
RECOMMENDED OPERATING CONDITIONS
MIN
Supplies and References
Operating Free-Air Temperature, TA
Analog Supply Voltage, AVDD
−40
3.15
Digital Supply Voltage, DVDD
1.6
Output Driver Supply Voltage, IOVDD
1.6
Input Common-Mode Voltage
Differential Input Voltage Range
Clock Inputs: MCLK and MCLKB
Sample Rate, fS
Differential Input Mode Voltage Input Swing
5
0.4
Differential Input Common-Mode Voltage
Single-Ended Mode High-Level Input Voltage, VIHC
Single-Ended Mode Low-Level Input Voltage, VILC
Clock Pulse Width High, tW(H)
Clock Pulse Width Low, tW(L)
Digital Inputs
High-Level Input Voltage, VIH
Low-Level Input Voltage, VIL
2
5.625
5.625
0.7 × IOVDD
TYP
3.3
1.8
VCM
2
1.65
6.25
6.25
MAX
85
3.45
2.0
3.6
80
3.3
0.8
0.25 × IOVDD
UNITS
°C
V
V
V
V
VPP
MHz
V
V
V
V
ns
ns
V
V
2





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