AD7874AR

更新时间： 2024-11-22 22:53:31

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
16页	417K
描述
LC2MOS 4-Channel, 12-Bit Simultaneous Sampling Data Acquisition System

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AD7874AR 数据手册

LC MOS 4-Channel, 12-Bit Simultaneous

Sampling Data Acquisition System

AD7874

FEATURES

FUNCTIO NAL BLO CK D IAGRAM

Four On-Chip Track/ Hold Am plifiers

Sim ultaneous Sam pling of 4 Channels

Fast 12-Bit ADC w ith 8 ␮s Conversion Tim e/ Channel

29 kHz Sam ple Rate for All Four Channels

On-Chip Reference

V_DDV_DD

INT CS

RD CONVST

INTERNAL

CLOCK

CONTROL LOGIC

CLK

TRACK/

HOLD 1

؎10 V Input Range

IN1

؎5 V Supplies

TRACK/

HOLD 2

COMP

IN2

APPLICATIONS

Sonar

Motor Controllers

Adaptive Filters

Digital Signal Processing

MUX

SAR

TRACK/

HOLD 3

IN3

DATA

DB0

REGISTERS

DB11

TRACK/

HOLD 4

IN4

REFERENCE

BUFFER

12-BIT

DAC

REF IN

AD7874

GENERAL D ESCRIP TIO N

REFERENCE

REF OUT

T he AD7874 is a four-channel simultaneous sampling, 12-bit

data acquisition system. T he part contains a high speed 12-bit

ADC, on-chip reference, on-chip clock and four track/hold am-

plifiers. T his latter feature allows the four input channels to be

sampled simultaneously, thus preserving the relative phase

information of the four input channels, which is not possible if

all four channels share a single track/hold amplifier. T his makes

the AD7874 ideal for applications such as phased-array sonar

and ac motor controllers where the relative phase information is

important.

V_SS

AGND DGND

P RO D UCT H IGH LIGH TS

1. Simultaneous Sampling of Four Input Channels.

Four input channels, each with its own track/hold amplifier,

allow simultaneous sampling of input signals. T rack/hold ac-

quisition time is 2 µs, and the conversion time per channel is

8 µs, allowing 29 kHz sample rate for all four channels.

T he aperture delay of the four track/hold amplifiers is small and

specified with minimum and maximum limits. T his allows sev-

eral AD7874s to sample multiple input channels simultaneously

without incurring phase errors between signals connected to

several devices. A reference output/reference input facility also

allows several AD7874s to be driven from the same reference

source.

2. T ight Aperture Delay Matching.

T he aperture delay for each channel is small and the aperture

delay matching between the four channels is less than 4 ns.

Additionally, the aperture delay specification has upper and

lower limits allowing multiple AD7874s to sample more than

four channels.

3. Fast Microprocessor Interface.

In addition to the traditional dc accuracy specifications such as

linearity, full-scale and offset errors, the AD7874 is also fully

specified for dynamic performance parameters including distor-

tion and signal-to-noise ratio.

T he high speed digital interface of the AD7874 allows direct

connection to all modern 16-bit microprocessors and digital

signal processors.

T he AD7874 is fabricated in Analog Devices’ Linear Compat-

ible CMOS (LC²MOS) process, a mixed technology process

that combines precision bipolar circuits with low-power CMOS

logic. T he part is available in a 28-pin, 0.6" wide, plastic or her-

metic dual-in-line package (DIP), in a 28-terminal leadless ce-

ramic chip carrier (LCCC) and in a 28-pin SOIC.

REV. C

Inform ation furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assum ed by Analog Devices for its

use, nor for any infringem ents of patents or other rights of third parties

which m ay result from its use. No license is granted by im plication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.

Tel: 617/ 329-4700

Fax: 617/ 326-8703

12 3 4 5 6 7...16

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与AD7874AR相关器件

型号	品牌	获取价格	描述	数据表
AD7874ARZ	ROCHESTER	获取价格	4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO28, SOIC-28
AD7874ARZ-REEL	ROCHESTER	获取价格	4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO28, SOIC-28
AD7874ARZ-REEL7	ROCHESTER	获取价格	4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO28, SOIC-28
AD7874BN	ADI	获取价格	LC2MOS 4-Channel, 12-Bit Simultaneous Sampling Data Acquisition System
AD7874BN	ROCHESTER	获取价格	4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDIP28, 0.600 INCH, PLASTIC, DI
AD7874BNZ	ADI	获取价格	LC2MOS 4-Channel, 12-Bit Simultaneous Sampling Data Acquisition System
AD7874BQ	ADI	获取价格	LC2MOS 4-Channel, 12-Bit Simultaneous Sampling Data Acquisition System
AD7874BQ	ROCHESTER	获取价格	4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, CDIP28, 0.600 INCH, HERMETIC SE
AD7874BQ/883B	ADI	获取价格	ADC, Successive Approximation
AD7874BR	ADI	获取价格	LC2MOS 4-Channel, 12-Bit Simultaneous Sampling Data Acquisition System

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