Datasheet > AD7725BSZ

AD7725BSZ

更新时间： 2024-11-07 19:56:35

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
28页	465K
描述
IC 1-CH 16-BIT DELTA-SIGMA ADC, SERIAL/PARALLEL ACCESS, PQFP44, PLASTIC, MS-022-AB, MQFP-44, Analog to Digital Converter

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AD7725BSZ 数据手册

16-Bit 900 kSPS ꢀ-ꢁ ADC with a

Programmable Postprocessor

AD7725

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Programmable Filtering:

AGND

REF2

REF1

2.5V

Any Characteristic up to 108 Tap FIR and/or IIR

Polynomial Signal Conditioning up to 8^thOrder

Programmable Decimation and Output Word Rate

Flexible Programming Modes:

Boot from DSP or External EPROM

Parallel/Serial Interface

AD7725

REFERENCE

POST-

PROCESSOR

DGND

(+)

(–)

PRESET

FILTER

MOD

DEFAULT FILTER

(ROM)

Internal Default Filter for Evaluation

14.4 MHz Max Master Clock Frequency

0 V to +4 V (Single-Ended) or ꢂ2 V (Differential) Input

Range

UNI

HALF PWR

STBY

XTAL_OFF

XTAL

CLKIN

XTAL

CLOCK

SYNC

S/P

SMODE1/DB15

SMODE0/DB14

Power Supplies: AV_DD, DV_DD: 5 V

On-Chip 2.5 V Voltage Reference

44-Lead MQFP Package

ꢂ 5%

SCR/DB13

CFGEND/DB12

DB11

DB10

FSO/DB9

RD/WR

SOE/CS

CFMT/RS

DVAL/INT

SDI/DB0

CONTROL

LOGIC

TYPICAL APPLICATIONS

Radar

Sonar

Auxiliary Car Functions

Medical Communications

GENERAL DESCRIPTION

The AD7725 is a complete 16-bit, ꢀ-ꢁ analog-to-digital con-

verter with on-chip, user-programmable signal conditioning. The

output of the modulator is processed by three cascaded finite

impulse response (FIR) filters, followed by a fully user-program-

mable postprocessor. The postprocessor provides processing

power of up to 130 million accumulates (MAC) per second. The

user has complete control over the filter response, the filter coeffi-

cients, and the decimation ratio.

Filter Wizard allows the user to design different filter types

and generates the appropriate configuration file to be down-

loaded to the postprocessor. The AD7725 also has an internal

default filter for evaluation purposes.

It provides 16-bit performance for input bandwidths up to

350 kHz with an output word rate of 900 kHz maximum. The

input sample rate is set either by the crystal oscillator or an

external clock.

The postprocessor permits the signal conditioning characteris-

tics to be programmed through a parallel or serial interface. It

is programmed by loading a user-defined filter in the form of a

configuration file. This filter can be loaded from a DSP or an

external serial EPROM. It is generated using a digital filter

design package called Filter Wizard, which is available from the

AD7725 section on the Analog Devices website.

This part has an accurate on-chip 2.5 V reference for the modu-

lator. A reference input/output function allows either the

internal reference or an external system reference to be used as

the reference source for the modulator.

The device is available in a 44-lead MQFP package and is speci-

fied over a –40°C to +85°C temperature range.

REV. A

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

www.analog.com

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AD7725BSZ 替代型号

型号	品牌	替代类型	描述	数据表
AD7725BS-REEL	ADI	完全替代	IC 1-CH 16-BIT DELTA-SIGMA ADC, SERIAL/PARALLEL ACCESS, PQFP44, PLASTIC, MS-022-AB, MQFP-4
AD7725BS	ADI	完全替代	16-Bit 900 kSPS ADC with a Programmable Postprocessor

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AD7729ARUZ	ROCHESTER	获取价格	SPECIALTY ANALOG CIRCUIT, PDSO28, TSSOP-28
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