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參數(shù)資料
| 型號： | AD73522 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Dual Analog Front End with Flash based DSP Microcomputer(帶閃速DSP微計算機的雙模擬前端) |
| 中文描述： | 雙模擬前端與閃存的DSP微機（帶閃速DSP的微計算機的雙模擬前端） |
| 文件頁數(shù)： | 1/46頁 |
| 文件大?。?/td> | 654K |
| 代理商： | AD73522 |
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AD73522
a
Prelimnary Technical Data
REV. PrC 05/99
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.
One Technology Way, PO. 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., 1998
Dual Analog Front End
wth Flash based DSP Mcrocomputer
DATA
TECHNCAL
FEATURES
AFE PERFORMANCE
Two 16-Bit A/D Converters
78 dB ADC SNR
Two 16-Bit D/A Converters
77 dB DAC SNR
Programmable Input/Output Sample Rates
64 kS/s Maximum Sample Rate
Programmable Input/Output Gain
On-Chip Reference
DSP PERFORMANCE
19 ns Instruction Cycle Time @ 3.3 Volts, 52 MIPS
Sustained Performance
AD73522-80
80K Bytes of On-Chip RAM, Configured as 16K Words
Program Memory RAM and 16K Words
Data Memory RAM
AD73522-40
40K Bytes of On-Chip RAM, Configured as 8K Words
Program Memory RAM and 8K Words
Data Memory RAM
FLASH Memory
64 kbytes
Writable in pages of 128 bytes
Fast Page Write Cycle of 5 ms (typical)
GE NE RAL D E SC RIPT ION
T he AD73522 is a single-device incorporating a dual analog
front end, microcomputer optimized for digital signal
processing (DSP) and a FLASH based boot memory for the
DSP.
T he AD73522’s analog front end (AFE) section features a
dual front-end converter for general purpose applications
including speech and telephony. T he AFE section features
two 16-bit A/D conversion channels and two 16-bit D/A
conversion channels. Each channel provides 77 dB signal-to-
noise ratio over a
voiceband signal bandwidth. It also features
an input to output gain network in both the analog and digital
domains. T his is featured on both codecs and can be used for
impedance matching or scaling when interfacing to Subscriber
Line Interface Circuits (SLICs)
T he AD73522 is particularly suitable for a variety of applica-
tions in the speech and telephony area including low bit rate,
high quality compression, speech enhancement, recognition
and synthesis. T he low group delay characteristic of the AFE
makes it suitable for single or multichannel active control
applications. T he A/D and D/A conversion channels feature
F UNC T IONAL BL OC K D IAGRAM
SERIAL PORTS
SPORT 1
SPORT 0
CBYTE DMA
EXDATA
BUS
EXTERNAL
ADDRESS
BUS
FULL MEMORY
MODE
MEMORY
PROGRAMMABLE
I/O
AND
FLAGS
16K PM
(OPTIONAL 8K)
TIMER
ADSP-2100 BASE
ARCHITECTURE
SHIFTER
MAC
ALU
ARITHMETIC UNITS
POWER-DOWN
CONTROL
PROGRAM
SEQUENCER
DAG 2
DAG 1
GENERATORS
PROGRAM MEMORY ADDRESS
DATA MEMORY ADDRESS
PROGRAM MEMORY DATA
DATA MEMORY DATA
16K DM
(OPTIONAL 8K)
SERIAL PORT
REF
ADC1
ADC2
DAC1
DAC2
ANALOG FRONT END
SECTION
FLASH
Byte Memory
64 kbytes
programmable input/ouput gains with ranges 38 dB and 21
dB respectively. An on-chip reference voltage is included
to allow single supply operation.
T he AD73522’s DSP engine combines the ADSP-2100
family base architecture (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.
T he AD73522-80 integrates 80K bytes of on-chip memory
configured as 16K words (24-bit) of program RAM, and 16K
words (16-bit) of data RAM. T he AD73522-40 integrates
40K bytes of on-chip memory configured as 8K words (24-
bit) of program RAM, and 8K words (16-bit) of data RAM.
Both devices feature a Flash memory array of 64 kbytes (512
kbits) connected to the DSP’s byte-wide DMA port
(BDMA). T his allows non-volatile storage of the DSP’s boot
code and system data parameters. Power-down circuitry is
also provided to meet the low power needs of battery
operated portable equipment. T he AD73522 is available in a
119-ball PBGA package.
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