AD7782

更新时间： 2024-02-10 03:22:39

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
12页	128K
描述
Read Only, Pin Configured 24-Bit ADC

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数据手册

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AD7782 数据手册

Read Only, Pin Configured

24-Bit ⌺-⌬ ADC

AD7782

FEATURES

FUNCTIONAL BLOCK DIAGRAM

2-Channel, 24-Bit ⌺-⌬ ADC

Pin Configurable (No Programmable Registers)

Pin Selectable Input Channels

GND

REFIN(+) REFIN(–) XTAL1 XTAL2

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

Fixed 19.79 Hz Update Rate

Simultaneous 50 Hz and 60 Hz Rejection

24-Bit No Missing Codes

OSCILLATOR

AND

AD7782

PLL

AIN1(+)

AIN1(–)

AIN2(+)

AIN2(–)

DOUT/RDY

SCLK

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

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

SERIAL

INTERFACE

24-BIT ⌺-⌬

ADC

MUX

BUF

PGA

AND

CONTROL

LOGIC

MODE

INTERFACE

Master or Slave Mode of Operation

Slave Mode

3-Wire Serial

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

Schmitt Trigger on SCLK

CH1/CH2

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-Rail Input Buffer and PGA

AD7782

AIN1(+)

AIN1(–)

ANALOG

INPUT

APPLICATIONS

DIGITAL

DOUT/RDY

SCLK

Sensor Measurement

Industrial Process Control

Temperature Measurement

Pressure Measurements

Weigh Scales

INTERFACE

AIN2(+)

AIN2(–)

ANALOG

INPUT

XTAL1

32.768kHz

CRYSTAL

REFIN(+)

REFIN(–)

REFERENCE

INPUT

XTAL2

GND

Portable Instrumentation

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. Eighteen-bit p-p resolution can be obtained at this update rate.

The AD7782 is a complete analog front end for low-frequency

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

two fully differential analog input channels that can be config-

ured 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.

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 3.9 mW.

The AD7782 is available in a 16-lead TSSOP package.

The AD7782 has an extremely simple, read-only digital interface

which can be operated in master mode or slave mode. There are

no on-chip registers to be programmed. The input signal range

and input channel selection are configured using two external pins.

Another part in the AD778x family is the AD7783. It is similar

to the AD7782 except it has two integrated current sources and

only one differential input channel.

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, nor for any infringements of patents or other rights of third parties that

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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与AD7782相关器件

型号	品牌	获取价格	描述	数据表
AD7782BRU	ADI	获取价格	Read Only, Pin Configured 24-Bit ADC
AD7782BRU-REEL	ROCHESTER	获取价格	2-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO16, PLASTIC, TSSOP-16
AD7782BRU-REEL7	ADI	获取价格	IC 2-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO16, PLASTIC, TSSOP-16, Analog to Digita
AD7782BRUZ	ADI	获取价格	2-Channel, Read-Only, Pin-Configured, 24-bit Sigma-Delta ADC
AD7782BRUZ-REEL	ADI	获取价格	2-Channel, Read-Only, Pin-Configured, 24-bit Sigma-Delta ADC
AD7782BRUZ-REEL7	ADI	获取价格	2-Channel, Read-Only, Pin-Configured, 24-bit Sigma-Delta ADC
AD7783	ADI	获取价格	Read-Only, Pin Configured 24-Bit ADC with Excitation Current Sources
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

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