AD7708BR

更新时间： 2024-01-23 23:59:48

品牌	Logo	应用领域
亚德诺 - ADI		转换器模数转换器
页数	文件大小	规格书
44页	334K
描述
8-/10-Channel, Low Voltage, Low Power, ADCs

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技术参数
数据手册

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AD7708BR 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SOIC
包装说明：	SOP, SOP28,.4	针数：	28
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	1.62
最大模拟输入电压：	2.56 V	最小模拟输入电压：	-2.56 V
转换器类型：	ADC, DELTA-SIGMA	JESD-30 代码：	R-PDSO-G28
JESD-609代码：	e3	长度：	17.9 mm
最大线性误差 (EL)：	0.0015%	湿度敏感等级：	1
模拟输入通道数量：	10	位数：	16
功能数量：	1	端子数量：	28
最高工作温度：	85 °C	最低工作温度：	-40 °C
输出位码：	BINARY, OFFSET BINARY	输出格式：	SERIAL
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装等效代码：	SOP28,.4	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	260
电源：	3/5 V	认证状态：	Not Qualified
座面最大高度：	2.65 mm	子类别：	Other Converters
标称供电电压：	3 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	30
宽度：	7.5 mm	Base Number Matches：	1

AD7708BR 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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