AD7856

更新时间： 2024-11-03 22:53:31

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
32页	296K
描述
5 V Single Supply, 8-Channel 14-Bit 285 kSPS Sampling ADC

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AD7856 数据手册

5 V Single Supply, 8-Channel

14-Bit 285 kSPS Sampling ADC

AD7856

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Single 5 V Supply

285 kSPS Throughput Rate

AGND

Self- and System Calibration with Autocalibration on

Power-Up

Eight Single-Ended or Four Pseudo-Differential Inputs

Low Power: 60 mW Typ

Automatic Power-Down After Conversion (2.5 ␮W Typ)

Flexible Serial Interface: 8051/SPI™/QSPI™/␮P Compatible

24-Lead DIP, SOIC and SSOP Packages

AIN1

AIN8

I/P

MUX

AD7856

T/H

4.096V

REFERENCE

COMP

DGND

REF /REF

BUF

OUT

APPLICATIONS

REF1

Battery-Powered Systems (Personal Digital Assistants,

Medical Instruments, Mobile Communications)

Pen Computers

CHARGE

REDISTRIBUTION

DAC

Instrumentation and Control Systems

High Speed Modems

CLKIN

SAR + ADC

CONTROL

CONVST

BUSY

REF2

CALIBRATION

MEMORY AND

CONTROLLER

CAL

SLEEP

GENERAL DESCRIPTION

SERIAL INTERFACE/CONTROL REGISTER

The AD7856 is a high speed, low power, 14-bit ADC that oper-

ates from a single 5 V power supply. The ADC powers up with

a set of default conditions at which time it can be operated as a

read only ADC. The ADC contains self-calibration and system

calibration options to ensure accurate operation over time and

temperature and it has a number of power-down options for low

power applications.

SYNC

DIN

DOUT

SCLK

PRODUCT HIGHLIGHTS

1. Single 5 V supply.

2. Automatic calibration on power-up.

The AD7856 is capable of 285 kHz throughput rate. The input

track-and-hold acquires a signal in 500 ns and features a pseudo-

differential sampling scheme. The AD7856 voltage range is 0 to

V_REFwith straight binary output coding. Input signal range is to

the supply and the part is capable of converting full power sig-

nals to 10 MHz.

3. Flexible power management options including automatic

power-down after conversion.

4. Operates with reference voltages from 1.2 V to V_DD

5. Analog input range from 0 V to V_DD

6. Eight single-ended or four pseudo-differential input channels.

7. Self- and system calibration.

CMOS construction ensures low power dissipation of typically

60 mW for normal operation and 5.1 mW in power-down mode

at 10 kSPS throughput rate. The part is available in 24-lead,

0.3 inch-wide dual in-line package (DIP), 24-lead small outline

(SOIC) and 24-lead small shrink outline (SSOP) packages.

Please see page 31 for data sheet index.

8. Versatile serial I/O port (SPI/QSPI/8051/µP).

SPI and QSPI are trademarks of Motorola, Inc.

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: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

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与AD7856相关器件

型号	品牌	获取价格	描述	数据表
AD7856AN	ADI	获取价格	5 V Single Supply, 8-Channel 14-Bit 285 kSPS Sampling ADC
AD7856ANZ	ADI	获取价格	5 V Single-Supply, 8-Channel, 14-Bit, 285 kSPS, Serial Sampling ADC
AD7856ANZ	ROCHESTER	获取价格	8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP24, PLASTIC, DIP-24
AD7856AR	ADI	获取价格	5 V Single Supply, 8-Channel 14-Bit 285 kSPS Sampling ADC
AD7856AR-REEL	ADI	获取价格	8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24, SOIC-24
AD7856AR-REEL7	ADI	获取价格	IC 8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24, SOIC-24, Analog to Dig
AD7856ARS	ADI	获取价格	5 V Single Supply, 8-Channel 14-Bit 285 kSPS Sampling ADC
AD7856ARS-REEL	ADI	获取价格	IC 8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24, SHRINK, SOP-24, Analog
AD7856ARS-REEL7	ROCHESTER	获取价格	8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24, SHRINK, SOP-24
AD7856ARS-REEL7	ADI	获取价格	IC 8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24, SHRINK, SOP-24, Analog

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