Datasheet > AD7718BR-REEL7

AD7718BR-REEL7

更新时间： 2024-11-07 14:47:35

品牌	Logo	应用领域
亚德诺 - ADI		光电二极管转换器
页数	文件大小	规格书
44页	326K
描述
24-Bit, 8/10-Channel, Low Voltage, Low Power, Sigma Delta ADC

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数据手册
替代型号

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AD7718BR-REEL7 数据手册

8-/10-Channel, Low Voltage,

Low Power, ⌺-⌬ ADCs

AD7708/AD7718

GENERAL DESCRIPTION

FEATURES

The AD7708/AD7718 are complete analog front-ends for low

frequency measurement applications. The AD7718 contains a

24-bit Σ-∆ ADC with PGA and can be configured as 4/5 fully-

differential input channels or 8/10 pseudo-differential input

channels. Two pins on the device are configurable as analog

inputs or reference inputs. The AD7708 is a 16-bit version of

the AD7718. Input signal ranges from 20 mV to 2.56 V can be

directly converted using these ADCs. Signals can be converted

directly from a transducer without the need for signal conditioning.

8-/10-Channel, High Resolution ⌺-⌬ ADCs

AD7708 Has 16-Bit Resolution

AD7718 Has 24-Bit Resolution

Factory-Calibrated

Single Conversion Cycle Setting

Programmable Gain Front End

Simultaneous 50 Hz and 60 Hz Rejection

VREF Select™ Allows Absolute and Ratiometric

Measurement Capability

Operation Can Be Optimized for

Analog Performance (CHOP = 0) or

Channel Throughput (CHOP = 1)

The device operates from a 32 kHz crystal with an on-board PLL

generating the required internal operating frequency. The output

data rate from the part is software programmable. The peak-to-

peak resolution from the part varies with the programmed gain

and output data rate.

INTERFACE

3-Wire Serial

SPI^TM, QSPI^TM, MICROWIRE^TM, and DSP-Compatible

Schmitt Trigger on SCLK

The part operates from a single 3 V or 5 V supply. When operating

from 3 V supplies, the power dissipation for the part is 3.84 mW typ.

Both parts are pin-for-pin compatible allowing an upgradable

path from 16 to 24 bits without the need for hardware modifica-

tions. The AD7708/AD7718 are housed in 28-lead SOIC and

TSSOP packages.

POWER

Specified for Single 3 V and 5 V Operation

Normal: 1.28 mA Typ @ 3 V

Power-Down: 30 ␮A (32 kHz Crystal Running)

On-Chip Functions

Rail-to-Rail Input Buffer and PGA

2-Bit Digital I/O Port

APPLICATIONS

Industrial Process Control

Instrumentation

Pressure Transducers

Portable Instrumentation

Smart Transmitters

FUNCTIONAL BLOCK DIAGRAM

DVDD DGND

REFIN2(+)/AIN9

REFIN1(+) REFIN2(–)/AIN10 REFIN1(–) XTAL1 XTAL2

OSC

AND

PLL

AIN1

AIN2

AIN3

AIN4

AIN5

AIN6

AIN7

AIN8

POS BUF

DOUT

DIN

SCLK

RDY

REFIN(+)

REFIN(–)

SERIAL

INTERFACE

AND

CONTROL

LOGIC

PGA

MUX

⌺-⌬ ADC*

NEG BUF

*AD7708 16-BIT ADC

*AD7718 24-BIT ADC

RESET

AVDD

AINCOM

I/O PORT

AD7708/AD7718

AVDD

AGND

SPI and QSPI are trademarks of Motorola Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

VREF Select is a trademark of Analog Devices, Inc.

REV. 0

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.

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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AD7718BR-REEL7 替代型号

型号	品牌	替代类型	描述	数据表
AD7718BRU-REEL	ADI	完全替代	10-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, TSSOP-28
AD7718BRUZ	ADI	功能相似	8-/10-Channel, Low Voltage, Low Power, ADCs

与AD7718BR-REEL7相关器件

型号	品牌	获取价格	描述	数据表
AD7718BRU	ADI	获取价格	8-/10-Channel, Low Voltage, Low Power, ADCs
AD7718BRU-REEL	ADI	获取价格	10-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, TSSOP-28
AD7718BRUZ	ADI	获取价格	8-/10-Channel, Low Voltage, Low Power, ADCs
AD7718BRUZ-REEL	ADI	获取价格	10-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, TSSOP-28
AD7718BRUZ-REEL7	ADI	获取价格	24-Bit, 8/10-Channel, Low Voltage, Low Power, Sigma Delta ADC
AD7718BRZ	ADI	获取价格	8-/10-Channel, Low Voltage
AD7718BRZ-REEL	ADI	获取价格	8-/10-Channel, Low Voltage, Low Power, -ADCs
AD7718BRZ-REEL7	ADI	获取价格	24-Bit, 8/10-Channel, Low Voltage, Low Power, Sigma Delta ADC
AD7718EB	ADI	获取价格	8-/10-Channel, Low Voltage, Low Power, ADCs
AD7719	ADI	获取价格	Low Voltage, Low Power, Factory-Calibrated 16-/24-Bit Dual ADC

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