Datasheet > EVAL-AD7723CB

EVAL-AD7723CB

更新时间： 2024-11-24 12:53:55

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
32页	751K
描述
16-Bit, 1.2 MSPS CMOS, Sigma-Delta ADC

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数据手册

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EVAL-AD7723CB 数据手册

16-Bit, 1.2 MSPS CMOS,

Sigma-Delta ADC

AD7723

FEATURES

FUNCTIONAL BLOCK DIAGRAM

16-bit Σ-∆ ADC

REF2

REF1

2.5V

REFERENCE

AD7723

1.2 MSPS output word rate

32×/16× oversampling ratio

Low-pass and band-pass digital filter

Linear phase

AGND

VIN(+)

VIN(–)

FIR

FILTER

DGND

MODULATOR

On-chip 2.5 V voltage reference

Standby mode

Flexible parallel or serial interface

Crystal oscillator

XTAL_OFF

XTAL

CLKIN

UNI

HALF_PWR

STBY

XTAL

CLOCK

MODE 1

DGND/DB15

DGND/DB14

MODE 2

SCR/DB13

SLDR/DB12

SLP/DB11

TSI/DB10

FSO/DB9

SYNC

Single 5 V supply

DV /CS

CONTROL

LOGIC

CFMT/RD

DGND/DRDY

DGND/DB0

GENERAL DESCRIPTION

The AD7723 is a complete 16-bit, sigma-delta ADC. The part

operates from a 5 V supply. The analog input is continuously

sampled, eliminating the need for an external sample-and-hold.

The modulator output is processed by a finite impulse response

(FIR) digital filter. The on-chip filtering combined with a high

oversampling ratio reduces the external antialias requirements

to first order in most cases. The digital filter frequency response

can be programmed to be either low-pass or band-pass.

DGND/ DGND/ DGND/ DOE/ SFMT/ FSI/ SCO/ SDO/

DB1

DB2 DB3 DB4 DB5 DB6 DB7 DB8

Figure 1.

The part provides an on-chip 2.5 V reference. Alternatively, an

external reference can be used.

A power-down mode reduces the idle power consumption

to 200 µW.

The AD7723 provides 16-bit performance for input bandwidths

up to 460 kHz at an output word rate up to 1.2 MHz. The

sample rate, filter corner frequencies, and output word rate are

set by the crystal oscillator or external clock frequency.

The AD7723 is available in a 44-lead MQFP package and is

specified over the industrial temperature range from

–40°C to +85°C.

Data can be read from the device in either serial or parallel

format. A stereo mode allows data from two devices to share a

single serial data line. All interface modes offer easy, high speed

connections to modern digital signal processors.

Two input modes are provided, allowing both unipolar and

bipolar input ranges.

Rev. C

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 that may result from its use.

Specifications subject to change without notice. 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: 781.461.3113

www.analog.com

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