AD7719BRZ

更新时间： 2024-09-17 13:05:23

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
40页	363K
描述
Low Voltage, Low Power, 16-/24-Bit, Dual Sigma Delta ADC

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替代型号

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AD7719BRZ 数据手册

Low Voltage, Low Power,

a_{Factory-Calibrated 16-/24-Bit Dual ꢀ-ꢁ ADC}

AD7719

Low-Side Power Switches

Reference Detect Circuit

FEATURES

HIGH RESOLUTION ꢀ-ꢁ ADCs

Two Independent ADCs (16- and 24-Bit Resolution)

Factory-Calibrated (Field Calibration Not Required)

Output Settles in One Conversion Cycle (Single

Conversion Mode)

Programmable Gain Front End

Simultaneous Sampling and Conversion of Two

Signal Sources

Separate Reference Inputs for Each Channel

Simultaneous 50 Hz and 60 Hz Rejection at 20 Hz

Update Rate

APPLICATIONS

Sensor Measurement

Temperature Measurement

Pressure Measurements

Weigh Scales

Portable Instrumentation

4–20 mA Transmitters

GENERAL DESCRIPTION

The AD7719 is a complete analog front end for low frequency

measurement applications. It contains two high resolution sigma-

delta ADCs, switchable matched excitation current sources,

low-side power switches, digital I/O port, and temperature

sensor. The 24-bit main channel with PGA accepts fully differen-

tial, unipolar, and bipolar input signal ranges from 1.024 ×

REFIN1/128 to 1.024 × REFIN1. Signals can be converted

directly from a transducer without the need for signal condi-

tioning. The 16-bit auxiliary channel has an input signal range

of REFIN2 or REFIN2/2.

ISOURCE Select^TM

24-Bit No Missing Codes—Main ADC

13-Bit p-p Resolution @ 20 Hz, 20 mV Range

18-Bit p-p Resolution @ 20 Hz, 2.56 V Range

INTERFACE

3-Wire Serial

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

Schmitt Trigger on SCLK

POWER

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

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.

Specified for Single 3 V and 5 V Operation

Normal: 1.5 mA Typ @ 3 V

Power-Down: 10 ꢂA (32 kHz Crystal Running)

ON-CHIP FUNCTIONS

Rail-Rail Input Buffer and PGA

4-Bit Digital I/O Port

On-Chip Temperature Sensor

Dual Switchable Excitation Current Sources

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

ating from 3 V supplies, the power dissipation for the part is

4.5 mW with both ADCs enabled and 2.85 mW with only the

main ADC enabled in unbuffered mode. The AD7719 is housed

in 28-lead SOIC and TSSOP packages.

FUNCTIONAL BLOCK DIAGRAM

REFIN1(+) REFIN1(–)

XTAL1 XTAL2

DGND

REFERENCE

DETECT

OSC. AND

PLL

IEXC1

200ꢂA

IEXC2

200ꢂA

AD7719

IOUT1

IOUT2

DOUT

DIN

SCLK

RDY

RESET

SERIAL

INTERFACE

AND

CONTROL

LOGIC

MAIN CHANNEL

24-BIT ꢀ-ꢁ ADC

AIN1

AIN2

AIN3

AIN4

MUX1

MMUUXX2

PGA

BUF

AGND

I/O PORT

AIN5

AIN6

AUXILIARY CHANNEL

16-BIT ꢀ-ꢁ ADC

TEMP

SENSOR

AGND

REFIN2

PWRGND

P1/SW1 P2/SW2 P3

ISOURCE Select is a trademark of Analog Devices.

SPI and QSPI are trademarks of Motorola Inc.

MICROWIRE is a trademark of National Semiconductor Corporation.

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

12 3 4 5 6 7...40

中文翻译

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AD7719BRZ 替代型号

型号	品牌	替代类型	描述	数据表
AD7719BR	ADI	功能相似	Low Voltage, Low Power, Factory-Calibrated 16-/24-Bit Dual ADC

与AD7719BRZ相关器件

型号	品牌	获取价格	描述	数据表
AD7720	ADI	获取价格	CMOS Sigma-Delta Modulator
AD7720BRU	ROCHESTER	获取价格	1-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, TSSOP-28
AD7720BRU	ADI	获取价格	CMOS Sigma-Delta Modulator
AD7720BRU-REEL	ROCHESTER	获取价格	1-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, TSSOP-28
AD7720BRU-REEL	ADI	获取价格	IC 1-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, TSSOP-28, Analog to Digital Convert
AD7720BRU-REEL7	ROCHESTER	获取价格	1-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, TSSOP-28
AD7720BRU-REEL7	ADI	获取价格	IC 1-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, TSSOP-28, Analog to Digital Convert
AD7720BRUZ	ADI	获取价格	CMOS Sigma-Delta Modulator with 90 dB Dynamic Range
AD7720BRUZ-REEL	ADI	获取价格	1-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, TSSOP-28
AD7721	ADI	获取价格	CMOS 16-Bit, 468.75 kHz, Sigma-Delta ADC

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