參數(shù)資料
型號： AD73422-40K
廠商： ANALOG DEVICES INC
元件分類： 數(shù)字信號處理
英文描述： Integrated Dual Analog Front End Codec And DSP Microcomputer(集成雙模擬前端的信號編解碼器和數(shù)字信號處理器的芯片)
中文描述： 24-BIT, 33.33 MHz, OTHER DSP, PBGA119
封裝： PLASTIC, BGA-119
文件頁數(shù)： 1/5頁
文件大小： 175K
代理商： AD73422-40K
FUNCTIONAL BLOCK DIAGRAM
a
Preliminary Technical Data
Integrated Dual Codec
and DSP Microcomputer
AD73422-40K
FEATURES
Single (+2.7V to +5.5V) Supply Operation
Codec
Dual 16-Bit A/D Converter
Dual 16-Bit D/A Converter
Programmable Input/Output Sample Rates
75 dB ADC SNR
70 dB DAC SNR
64 kS/s Maximum Sample Rate
-90 dB Crosstalk
Low Group Delay (25
μ
S typ per channel)
Programmable Input/Output Gain
Flexible Serial Port which allows extra AD733xx
devices to be cascaded
On-chip Reference
DSP Microcomputer
30 ns Instruction Cycle Time from 16.67 MHz Crystal
@ 5.0 Volts
33 MIPS Sustained Performance
Single-Cycle Instruction Execution
Single-Cycle Context Switch
3-Bus Architecture Allows Dual Operand Fetches in
Every Instruction Cycle
Multifunction Instructions
Power-Down Mode Featuring Low CMOS Standby
Power Dissipation with 100 Cycle
Recovery from
Power-Down Condition
Low Power Dissipation in Idle Mode
Draft Prelim B1 04/98
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.
ICE-Port is a trademark of Analog Devices, Inc.
Analog Devices, Inc., 1995
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
GENERAL DESCRIPTION
The AD73422-40K combines an AD73322 Dual Analog Front
End (AFE) with an ADSP-218x DSP core in a single device. It
is suitable for a variety of applications in the speech and tele-
phony area including low bit rate, high quality compression,
speech enhancement, recognition and synthesis. The low group
delay characteristic of the part makes it suitable for single or
multi-channel active control applications.. The AD73422-40K
features a dual 16-bit linear codec with programmable Analog I/
O gain, sample rates and serial transfer rates.
The ADSP-218x features the ADSP-2100 family base architec-
ture (three computational units, data address generators 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. It is optimized for digital signal processing (DSP) and
other high speed numeric processing applications.
The AD73422-40K features 40K bytes of on-chip DSP
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 por-
table equipment. The AD73422-40K is available in a 119-ball
Plastic Ball Grid Array (PBGA) package.
APPLICATIONS
General Purpose Analog I/O
Speech Processing
Cordless and Personal Communications
Telephony
Wireless Local Loop
Active Control of Sound & Vibration
Data Communications
SERIAL PORTS
MEMORY
FLAGS
PROGRAMMABLE
I/O
BYTE DMA
CONTROLLER
PROGRAM
MEMORY
DATA
MEMORY
EXTERNAL
ADDRESS
BUS
EXTERNAL
DATA
BUS
DMA
BUS
INTERNAL
DMA
PORT
TIMER
SPORT 1
SPORT 0
ADSP-2100 BASE
ARCHITECTURE
SHIFTER
MAC
ALU
ARITHMETIC UNITS
POWERDOWN
CONTROL
PROGRAM
SEQUENCER
DAG 0
DAG 1
DATA ADDRESS
GENERATORS
PROGRAM MEMORY
ADDRESS
DATA MEMORY ADDRESS
PROGRAM MEMORY DATA
DATA MEMORY DATA
SERIAL
I/O
PORT
SIGMA DELTA ADC
SIGMA DELTA ADC
SIGMA DELTA DAC
SIGMA DELTA DAC
REFERENCE
ANALOG FRONT
END
AD73422 BLOCK DIAGRAM
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