AD7783

更新时间： 2023-12-18 00:00:00

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
12页	206K
描述
Read-Only, Pin Configured 24-Bit ADC with Excitation Current Sources

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数据手册

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AD7783 数据手册

Read-Only, Pin Configured 24-Bit ⌺-⌬ ADC

with Excitation Current Sources

AD7783

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Single-Channel, 24-Bit ⌺-⌬ ADC

Pin Configurable (No Programmable Registers)

ISOURCE Select™

Pin Programmable Input Ranges (±2.56 V or ±160 mV)

Fixed 19.79 Hz Update Rate

XTAL1 XTAL2

REFIN(+) REFIN(–)

GND

IEXC1

IEXC2

200␮A

IOUT1

OSCILLATOR

AND

Simultaneous 50 Hz and 60 Hz Rejection

24-Bit No Missing Codes

PLL

IOUT2

IPIN

18.5-Bit p-p Resolution (±2.56 V Range)

DOUT/RDY

SCLK

SERIAL

INTERFACE

AND

CONTROL

LOGIC

16.5-Bit p-p Resolution (±160 mV Range)

AIN(+)

AIN(–)

24-BIT ⌺-⌬

ADC

MUX

BUF

PGA

INTERFACE

MODE

Master or Slave Mode of Operation

Slave Mode

AD7783

3-Wire Serial

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

Schmitt Trigger on SCLK

RANGE

POWER

Specified for Single 3 V and 5 V Operation

Normal: 1.3 mA @ 3 V

Power-Down: 9 ␮A

BASIC CONNECTION DIAGRAM

POWER SUPPLY

ON-CHIP FUNCTIONS

Rail-to-Rail Input Buffer and PGA

AD7783

APPLICATIONS

AIN(+)

AIN(–)

ANALOG

INPUT

Sensor Measurement

Industrial Process Control

Temperature Measurement

Pressure Measurement

Weigh Scales

DIGITAL

INTERFACE

DOUT/RDY

SCLK

IOUT1

IOUT2

CURRENT

SOURCES

XTAL1

32.768kHz

CRYSTAL

REFIN(+)

REFIN(–)

REFERENCE

INPUT

XTAL2

Portable Instrumentation

GND

GENERAL DESCRIPTION

The device operates from a 32.768 kHz crystal with an on-chip

PLL generating the required internal operating frequency. The

output data rate from the part is fixed via the master clock at

19.79 Hz and provides simultaneous 50 Hz and 60 Hz rejection

at this update rate. At this update rate, 18-bit p-p resolution can

be obtained.

The AD7783 is a complete analog front end for low frequency

measurement applications. The 24-bit sigma-delta ADC con-

tains one fully differential input channel that can be configured

with a gain of 1 or 16 allowing full-scale input signal ranges of

±2.56 V or ±160 mV from a +2.5 V differential reference input.

It also contains two 200 mA integrated 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

3.9 mW. The AD7783 is available in a 16-lead TSSOP.

The AD7783 has an extremely simple, read-only digital inter-

face that can be operated in master mode or slave mode.

There are no on-chip registers to be programmed. The input

signal range and current source selection are configured using

two external pins.

Another part in the AD778x family is the AD7782. It is similar

to the AD7783 except it has no integrated current sources and

two differential input channels.

REV. B

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. 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: 781/326-8703

www.analog.com

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与AD7783相关器件

型号	品牌	获取价格	描述	数据表
AD7783_17	ADI	获取价格	Read-Only, Pin Configured 24-Bit ADC
AD7783BRU	ADI	获取价格	Read-Only, Pin Configured 24-Bit ADC with Excitation Current Sources
AD7783BRU	ROCHESTER	获取价格	1-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO16, MS-153-AB, TSSOP-16
AD7783BRU-REEL	ADI	获取价格	Read-Only, Pin Configured 24-Bit ADC with Excitation Current Sources
AD7783BRU-REEL7	ADI	获取价格	Read-Only, Pin Configured 24-Bit ADC with Excitation Current Sources
AD7783BRU-REEL7	ROCHESTER	获取价格	1-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO16, MS-153-AB, TSSOP-16
AD7783BRUZ	ROCHESTER	获取价格	1-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO16, MS-153-AB, TSSOP-16
AD7783BRUZ	ADI	获取价格	Read-Only, Pin Configured 24-Bit ADC
AD7783BRUZ-REEL7	ADI	获取价格	Read-Only, Pin Configured 24-Bit ADC
AD7785	ADI	获取价格	3-Channel, Low Noise, Low Power, 20-Bit ⒉-ツ A

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