AD7738

更新时间： 2024-11-05 22:49:59

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
28页	382K
描述
8-Channel, High Throughput,

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数据手册

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AD7738 数据手册

8-Channel, High Throughput,

24-Bit ꢀ-ꢁ ADC

AD7738

FUNCTIONAL BLOCK DIAGRAM

FEATURES

High Resolution ADC

24 Bits No Missing Codes

MUXOUT ADCIN

REFIN– REFIN+

ꢂ0.0015% Nonlinearity

REFERENCE

DETECT

AIN0

AIN1

AIN2

AIN3

AIN4

AIN5

AIN6

AIN7

Optimized for Fast Channel Switching

18-Bits p-p Resolution (21 Bits Effective) at 500 Hz

16-Bits p-p Resolution (19 Bits Effective) at 8.5 kHz

15-Bits p-p Resolution (18 Bits Effective) at 15 kHz

On-Chip Per Channel System Calibration

Configurable Inputs

8 Single-Ended or 4 Fully Differential

Input Ranges

+625 mV, +1.25 V, +2.5 V, ꢂ625 mV, ꢂ1.25 V, ꢂ2.5 V

3-Wire Serial Interface

BUFFER

24-BIT

ꢀ-ꢁ ADC

MUX

AD7738

SCLK

DOUT

DIN

SPI™, QSPI™, MICROWIRE™ and DSP Compatible

Schmitt Trigger on Logic Inputs

Single-Supply Operation

CALIBRATION

CIRCUITRY

SERIAL

INTERFACE

AINCOM/P0

5 V Analog Supply

3 V or 5 V Digital Supply

Package: 28-Lead TSSOP

RDY

CLOCK

GENERATOR

CONTROL

LOGIC

I/O PORT

SYNC/P1

RESET

APPLICATIONS

PLCs/DCS

Multiplexing Applications

Process Control

AGND AV

MCLKOUT

MCLKIN

DGND DV

Industrial Instrumentation

GENERAL DESCRIPTION

The differential reference input features “No-Reference” detect

capability. The ADC also supports per channel system calibra-

tion options.

The AD7738 is a high precision, high throughput analog front

end. True 16-bit p-p resolution is achievable with a total con-

version time of 117 µs (8.5 kHz channel switching), making it

ideally suitable for high resolution multiplexing applications.

The digital serial interface can be configured for 3-wire opera-

tion and is compatible with microcontrollers and digital signal

processors. All interface inputs are Schmitt triggered.

The part can be configured via a simple digital interface, which

allows users to balance the noise performance against data

throughput up to a 15.4 kHz.

The part is specified for operation over the extended industrial

temperature range of –40ꢃC to +105ꢃC.

The analog front end features eight single-ended or four fully

differential input channels with unipolar or bipolar 625 mV,

1.25 V, and 2.5 V input ranges and accepts a common-mode

input voltage from 200 mV above AGND to AV_DD– 300 mV.

The multiplexer output is pinned out externally, allowing the

user to implement programmable gain or signal conditioning

before applying the input to the ADC.

Other parts in the AD7738 family are the AD7734 and the

AD7732.

The AD7734 analog front end features four single-ended input

channels with unipolar or true bipolar input ranges to 10 V

while operating from a single 5 V analog supply. The AD7734

accepts an analog input overvoltage to 16.5 V while not

degrading the performance of the adjacent channels.

The AD7732 is similar to AD7734, but its analog front end

features two fully differential input channels.

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

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AD7738BRUZ	ADI	获取价格	8-Channel, High Throughput, 24-Bit - ADC
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AD7739BRU	ADI	获取价格	8-Channel, High Throughput, 24-Bit Sigma-Delta ADC
AD7739BRU-REEL	ADI	获取价格	8-Channel, High Throughput, 24-Bit Sigma-Delta ADC
AD7739BRU-REEL7	ADI	获取价格	8-Channel, High Throughput, 24-Bit Sigma-Delta ADC
AD7739BRUZ	ADI	获取价格	8-Channel, High Throughput, 24-Bit Sigma-Delta ADC
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