AD73411BB-40 datasheet(1/36 Pages) AD

Teilenummer	AD73411BB-40

Bauteilbeschribung	Low-Power Analog Front End with DSP Microcomputer

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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

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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