AD7713AQ

更新时间： 2024-11-29 22:49:59

品牌	Logo	应用领域
亚德诺 - ADI		转换器模数转换器电信
页数	文件大小	规格书
28页	517K
描述
LC2MOS Loop-Powered Signal Conditioning ADC

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AD7713AQ 数据手册

LC²MOS

Loop-Powered Signal Conditioning ADC

AD7713*

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Charge Balancing ADC

24 Bits No Missing Codes

REF

IN(+)

REF

IN(–)

BIAS

STANDBY

؎0.0015% Nonlinearity

Three-Channel Programmable Gain Front End

Gains from 1 to 128

AD7713

1µA

Two Differential Inputs

CHARGING BALANCING A/D

CONVERTER

One Single Ended High Voltage Input

Low-Pass Filter with Programmable Filter Cutoffs

Ability to Read/Write Calibration Coefficients

Bidirectional Microcontroller Serial Interface

Single Supply Operation

AIN1(+)

AIN1(–)

AIN2(+)

AIN2(–)

AUTO-ZEROED

∑ − ∆

MODULATOR

DIGITAL

FILTER

SYNC

PGA

A = 1 – 128

MCLK

CLOCK

GENERATION

INPUT

SCALING

AIN3

Low Power (3.5 mW typ) with Power-Down Mode

(150 ␮W typ)

MCLK

OUT

200µA

SERIAL INTERFACE

APPLICATIONS

Loop Powered (Smart) Transmitters

RTD Transducers

OUTPUT

CONTROL

RTD1

RTD2

200µA

Process Control

Portable Industrial Instruments

AGND DGND

RFS TFS MODE SDATA SCLK DRDY A0

GENERAL DESCRIPTION

CMOS construction ensures low power dissipation and a hard-

ware programmable power-down mode reduces the standby

power consumption to only 150 µW typical. The part is avail-

able in a 24-pin, 0.3 inch wide, plastic and hermetic dual-in-line

package (DIP) as well as a 24-lead small outline (SOIC) package.

The AD7713 is a complete analog front end for low frequency

measurement applications. The device accepts low level signals

directly from a transducer or high level signals (4 × V_REF) and

outputs a serial digital word. It employs a sigma-delta con-

version technique to realize up to 24 bits of no missing codes

performance. The input signal is applied to a proprietary pro-

grammable gain front end based around an analog modulator.

The modulator output is processed by an on-chip digital filter.

The first notch of this digital filter can be programmed via the

on-chip control register allowing adjustment of the filter cutoff

and settling time.

PRODUCT HIGHLIGHTS

1. The AD7713 consumes less than 1 mA in total supply cur-

rent, making it ideal for use in loop-powered systems.

2. The two programmable gain channels allow the AD7713 to

accept input signals directly from a transducer removing a

considerable amount of signal conditioning. To maximize the

flexibility of the part, the high level analog input accepts

4 × V_REFsignals. On-chip current sources provide excitation

for three-wire and four-wire RTD configurations.

The part features two differential analog inputs and one single-

ended high level analog input as well as a differential reference

input. It can be operated from a single supply (AV_DDand DV_DD

at +5 V). The part provides two current sources which can be

used to provide excitation in three-wire and four-wire RTD con-

figurations. The AD7713 thus performs all signal conditioning

and conversion for a single, dual or three-channel system.

3. No Missing Codes ensures true, usable, 24-bit dynamic

range coupled with excellent ±0.0015% accuracy. The effects

of temperature drift are eliminated by on-chip self-calibration,

which removes zero-scale and full-scale errors.

The AD7713 is ideal for use in smart, microcontroller-based

systems. Gain settings, signal polarity and RTD current control

can be configured in software using the bidirectional serial port.

The AD7713 contains self-calibration, system calibration and

background calibration options and also allows the user to read

and to write the on-chip calibration registers.

4. The AD7713 is ideal for microcontroller or DSP processor

applications with an on-chip control register which allows

control over filter cutoff, input gain, signal polarity and cali-

bration modes. The AD7713 allows the user to read and

write the on-chip calibration registers.

*Protected by U.S. Patent No. 5,134,401.

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

which 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: 617/329-4700

Fax: 617/326-8703

12 3 4 5 6 7...28

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AD7713AQ 替代型号

型号	品牌	替代类型	描述	数据表
AD7713ANZ	ADI	完全替代	Loop-Powered Signal Conditioning ADC
AD7713AN	ADI	完全替代	LC2MOS Loop-Powered Signal Conditioning ADC
AD7713SQ	ADI	类似代替	LC2MOS Loop-Powered Signal Conditioning ADC

与AD7713AQ相关器件

型号	品牌	获取价格	描述	数据表
AD7713AR	ADI	获取价格	LC2MOS Loop-Powered Signal Conditioning ADC
AD7713AR-REEL	ADI	获取价格	Loop-Powered Signal Conditioning ADC
AD7713AR-REEL7	ADI	获取价格	LC2MOS Loop-Powered Signal Conditioning ADC
AD7713ARZ	ADI	获取价格	LC2MOS Loop-Powered Signal Conditioning ADC
AD7713ARZ-REEL	ADI	获取价格	CMOS, Low Power 24-Bit Sigma-Delta, Signal Conditioning ADC with Matched RTD Current Sourc
AD7713SQ	ADI	获取价格	LC2MOS Loop-Powered Signal Conditioning ADC
AD7713SQ/883B	ADI	获取价格	IC 3-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, CDIP24, 0.300 INCH, HERMETIC SEALED, CERDIP
AD7713SR	ADI	获取价格	IC 1-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO24, SOIC-24, Analog to Digital Converter
AD7714	ADI	获取价格	3 V/5 V, CMOS, 500 uA Signal Conditioning ADC
AD7714*	ADI	获取价格	3 V/5 V. CMOS. 500 uA Signal Conditioning ADC

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