AD7854

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
28页	264K
描述
3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs

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AD7854 数据手册

3 V to 5 V Single Supply, 200 kSPS

12-Bit Sampling ADCs

AD7854/AD7854L*

FUNCTIONAL BLOCK DIAGRAM

FEATURES

AGND

Specified for V_DDof 3 V to 5.5 V

Read-Only Operation

AD7854–200 kSPS; AD7854L–100 kSPS

System and Self-Calibration

Low Power

AIN(+)

AIN(–)

AD7854/AD7854L

T/H

2.5V

REFERENCE

Normal Operation

AD7854: 15 mW (V_DD= 3 V)

AD7854L: 5.5 mW (V_DD= 3 V)

Automatic Power-Down After Conversion (25 ␮W)

AD7854: 1.3 mW 10 kSPS

AD7854L: 650 ␮W 10 kSPS

Flexible Parallel Interface

COMP

REF

BUF

REF

OUT

DGND

CLKIN

REF1

CHARGE

REDISTRIBUTION

DAC

12-Bit Parallel/8-Bit Parallel (AD7854)

28-Lead DIP, SOIC and SSOP Packages (AD7854)

SAR + ADC

CONTROL

CONVST

REF2

CALIBRATION

MEMORY

BUSY

APPLICATIONS

AND CONTROLLER

Battery-Powered Systems (Personal Digital Assistants,

Medical Instruments, Mobile Communications)

Pen Computers

PARALLEL INTERFACE/CONTROL REGISTER

Instrumentation and Control Systems

High Speed Modems

HBEN

DB11–DB0

GENERAL DESCRIPTION

PRODUCT HIGHLIGHTS

1. Operation with either 3 V or 5 V power supplies.

The AD7854/AD7854L is a high speed, low power, 12-bit ADC

that operates from a single 3 V or 5 V power supply, the

AD7854 being optimized for speed and the AD7854L for low

power. 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 en-

sure accurate operation over time and temperature and has a

number of power-down options for low power applications.

2. Flexible power management options including automatic

power-down after conversion. By using the power manage-

ment options a superior power performance at slower

throughput rates can be achieved:

AD7854: 1 mW typ @ 10 kSPS

AD7854L: 1 mW typ @ 20 kSPS

3. Operates with reference voltages from 1.2 V to AV_DD

4. Analog input ranges from 0 V to AV_DD

The AD7854 is capable of 200 kHz throughput rate while the

AD7854L is capable of 100 kHz throughput rate. The input

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

differential sampling scheme. The AD7854 and AD7854L input

voltage range is 0 to V_REF(unipolar) and –V_REF/2 to +V_REF/2,

centered at V_REF/2 (bipolar). The coding is straight binary in

unipolar mode and twos complement in bipolar mode. Input

signal range is to the supply and the part is capable of convert-

ing full-power signals to 100 kHz.

5. Self-calibration and system calibration.

6. Versatile parallel I/O port.

7. Lower power version AD7854L.

CMOS construction ensures low power dissipation of typically

5.4 mW for normal operation and 3.6 µW in power-down mode.

The part is available in 28-lead, 0.6 inch wide dual-in-line pack-

age (DIP), 28-lead small outline (SOIC) and 28-lead small

shrink outline (SSOP) packages.

*Patent pending.

See Page 27 for data sheet index.

REV. B

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AD7854相关器件

型号	品牌	获取价格	描述	数据表
AD7854_15	ADI	获取价格	3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs
AD7854AQ	ADI	获取价格	3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs
AD7854AR	ADI	获取价格	3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs
AD7854AR-REEL	ADI	获取价格	1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO28, SOIC-28
AD7854ARS	ADI	获取价格	3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs
AD7854ARS-REEL	ADI	获取价格	1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO28, SSOP-28
AD7854ARSZ	ADI	获取价格	3 V to 5 V Single Supply, 200 kSPS, 12-Bit, Parallel Sampling ADC
AD7854ARZ	ADI	获取价格	3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs
AD7854ARZ-REEL	ADI	获取价格	3 V to 5 V Single Supply, 200 kSPS, 12-Bit, Parallel Sampling ADC
AD7854BR	ADI	获取价格	3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs

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