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AD73411 数据表(PDF) 1 Page - Analog Devices

部件名 AD73411
功能描述  Low-Power Analog Front End with DSP Microcomputer
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD73411 数据表(HTML) 1 Page - Analog Devices

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Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
AD73411
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2000
Low-Power
Analog Front End with DSP Microcomputer
FUNCTIONAL BLOCK DIAGRAM
ADC
DAC
SERIAL PORT
SPORT 2
REF
EXTERNAL
ADDRESS
BUS
HOST MODE
SERIAL PORTS
SPORT 0
SHIFTER
MAC
ALU
ARITHMETIC UNITS
MEMORY
PROGRAMMABLE
I/O
AND
FLAGS
BYTE DMA
CONTROLLER
TIMER
ADSP-2100 BASE
ARCHITECTURE
POWER-DOWN
CONTROL
PROGRAM
SEQUENCER
DAG 2
DATA
ADDRESS
GENERATORS
PROGRAM MEMORY ADDRESS
DATA MEMORY ADDRESS
PROGRAM MEMORY DATA
DATA MEMORY DATA
INTERNAL
DMA
PORT
DAG 1
16K DM
(OPTIONAL
8K)
16K PM
(OPTIONAL
8K)
EXTERNAL
DATA
BUS
FULL MEMORY
MODE
OR
EXTERNAL
DATA
BUS
SPORT 1
ANALOG FRONT END
SECTION
FEATURES
AFE PERFORMANCE
16-Bit A/D Converter
16-Bit D/A Converter
Programmable Input/Output Sample Rates
76 dB ADC SNR
77 dB DAC SNR
64 kS/s Maximum Sample Rate
–90 dB Crosstalk
Low Group Delay (25
s Typ per ADC Channel,
50
s Typ per DAC Channel)
Programmable Input/Output Gain
On-Chip Reference
DSP PERFORMANCE
19 ns Instruction Cycle Time @ 3.3 V, 52 MIPS
Sustained Performance
AD73411-80
80K Bytes of On-Chip RAM, Configured as 16K Words
Program Memory RAM and 16K Words
Data Memory RAM
AD73411-40
40K Bytes of On-Chip RAM, Configured as 8K Words
Program Memory RAM and 8K Words
Data Memory RAM
GENERAL DESCRIPTION
The AD73411 is a single device incorporating a single analog front
end (AFE) and a microcomputer optimized for digital signal
processing (DSP) and other high-speed numeric processing
applications.
The AD73411’s analog front end (AFE) section is suitable for
general-purpose applications including speech and telephony.
The AFE section features a 16-bit A/D converter and a 16-bit
D/A converter. Each converter provides 76 dB signal-to-noise
ratio over a voiceband signal bandwidth.
The AD73411 is particularly suitable for a variety of applications
in the speech and telephony area, including low bit rate, high-
quality compression, speech enhancement, recognition, and
synthesis. The low group delay characteristic of the AFE makes
it suitable for single or multichannel active control applications.
The A/D and D/A conversion channels feature programmable
input/output gains with ranges of 38 dB and 21 dB respectively.
An on-chip reference voltage is included to allow single supply
operation.
The sampling rate of the AFE is programmable with four sepa-
rate settings offering 64, 32, 16, and 8 kHz sampling rates (from
a master clock of 16.384 MHz) while the serial port (SPORT2)
allows easy expansion of the number of I/O channels by cascad-
ing extra AFEs external to the AD73411.
The AD73411’s DSP engine combines the ADSP-2100 family
base architecture (three computational units, data address gen-
erators, and a program sequencer) with two serial ports, a 16-bit
internal DMA port, a byte DMA port, a programmable timer,
Flag I/O, extensive interrupt capabilities, and on-chip program
and data memory.
The AD73411-80 integrates 80K bytes of on-chip memory
configured as 16K words (24-bit) of program RAM, and 16K
words (16-bit) of data RAM. The AD73411-40 integrates
40K bytes of on-chip memory configured as 8K words (24-
bit) of program RAM, and 8K words (16-bit) of data RAM.
Power-down circuitry is also provided to meet the low power
needs of battery-operated portable equipment. The AD73411
is available in a 119-ball PBGA package.


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