Datasheet > AD7716BPZ

AD7716BPZ

更新时间： 2024-11-07 21:14:23

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
17页	489K
描述
CMOS, 4-Channel, 22-Bit Data Acquisition System

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AD7716BPZ 数据手册

LC²MOS

22-Bit Data Acquisition System

AD7716

FUNCTIONAL BLOCK DIAGRAM

FEATURES

22-Bit Sigma-Delta ADC

RESET

CLKIN CLKOUT

A0 A1 A2

Dynamic Range of 105 dB (146 Hz Input)

؎0.003% Integral Nonlinearity

On-Chip Low-Pass Digital Filter

Cutoff Programmable from 584 Hz to 36.5 Hz

Linear Phase Response

AD7716

CLOCK

GENERATION

LOW PASS

DIGITAL

FILTER

ANALOG

MODULATOR

MODE

CONTROL

CASCIN

CASCOUT

Five Line Serial I/O

LOGIC

Twos Complement Coding

Easy Interface to DSPs and Microcomputers

Software Control of Filter Cutoff

؎5 V Supply

LOW PASS

DIGITAL

FILTER

ANALOG

MODULATOR

RFS

OUTPUT

SHIFT

SDATA

SCLK

LOW PASS

DIGITAL

FILTER

ANALOG

MODULATOR

Low Power Operation: 50 mW

DRDY

APPLICATIONS

Biomedical Data Acquisition

ECG Machines

LOW PASS

DIGITAL

FILTER

ANALOG

MODULATOR

CONTROL

TFS

EEG Machines

Process Control

High Accuracy Instrumentation

Seismic Systems

AGND DGND

REF

OUT

GENERAL DESCRIPTION

There are 22 bits of data corresponding to the analog input.

Two bits contain the channel address and 3 bits are the device

address. Thus, each channel in a 32-channel system would have

a discrete 5-bit address. The device also has a CASCOUT pin

and a CASCIN pin that allow simple networking of multiple

devices.

The AD7716 is a signal processing block for data acquisition

systems. It is capable of processing four channels with band-

widths of up to 584 Hz. Resolution is 22 bits and the usable

dynamic range varies from 111 dB with an input bandwidth of

36.5 Hz to 99 dB with an input bandwidth of 584 Hz.

The device consists of four separate A/D converter channels that

are implemented using sigma-delta technology. Sigma-delta

ADCs include on-chip digital filtering and, thus, the system

filtering requirements are eased.

The on-chip control register is programmed using the SCLK,

SDATA and TFS pins. Three bits of the Control Register set

the digital filter cutoff frequency for the device. Selectable fre-

quencies are 584 Hz, 292 Hz, 146 Hz, 73 Hz and 36.5 Hz. A

further 2 bits appear as outputs D_OUT1 and D_OUT2 and can be

used for controlling calibration at the front end. The device is

available in a 44-pin PQFP (Plastic Quad Flatpack) and 44-pin

PLCC.

Three address pins program the device address. This allows a

data acquisition system with up to 32 channels to be set up in a

simple fashion. The output word from the device contains 32

bits of data. One bit is determined by the state of the D_IN1 in-

put and may be used, for example, in an ECG system with an

external pacemaker detect circuit to indicate that the output

word is invalid because of the presence of a pacemaker pulse.

REV. A

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...17

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AD7716BPZ 替代型号

型号	品牌	替代类型	描述	数据表
AD7716BP	ADI	完全替代	LC2MOS 22-Bit Data Acquisition System

与AD7716BPZ相关器件

型号	品牌	获取价格	描述	数据表
AD7716BS	ADI	获取价格	LC2MOS 22-Bit Data Acquisition System
AD7716BSZ	ADI	获取价格	LC2MOS 22-Bit Data Acquisition System
AD7718	ADI	获取价格	8-/10-Channel, Low Voltage, Low Power, ADCs
AD7718BR	ADI	获取价格	8-/10-Channel, Low Voltage, Low Power, ADCs
AD7718BR-REEL	ADI	获取价格	10-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, SOIC-28
AD7718BR-REEL7	ADI	获取价格	24-Bit, 8/10-Channel, Low Voltage, Low Power, Sigma Delta ADC
AD7718BRU	ADI	获取价格	8-/10-Channel, Low Voltage, Low Power, ADCs
AD7718BRU-REEL	ADI	获取价格	10-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, TSSOP-28
AD7718BRUZ	ADI	获取价格	8-/10-Channel, Low Voltage, Low Power, ADCs
AD7718BRUZ-REEL	ADI	获取价格	10-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, TSSOP-28

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