Datasheet > AD7858_15

AD7858_15

更新时间： 2024-11-05 01:19:43

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
32页	306K
描述
3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADC

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AD7858_15 数据手册

3 V to 5 V Single Supply, 200 kSPS

8-Channel, 12-Bit Sampling ADC

AD7858/AD7858L

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Specified for V_DDof 3 V to 5.5 V

AD7858—200 kSPS; AD7858L—100 kSPS

System and Self-Calibration with Autocalibration on

Power-Up

Eight Single-Ended or Four Pseudo-Differential Inputs

Low Power

AGND

AIN1

AIN8

AD7858/

AD7858L

I/P

MUX

T/H

AD7858: 12 mW (V_DD= 3 V)

AD7858L: 4.5 mW (V_DD= 3 V)

2.5V

REFERENCE

COMP

Automatic Power-Down After Conversion (25 ␮W)

Flexible Serial Interface:

DGND

REF /REF

BUF

OUT

8051/SPI™/QSPI™/␮P Compatible

24-Lead DIP, SOIC, and SSOP Packages

REF1

CHARGE

REDISTRIBUTION

DAC

APPLICATIONS

Battery-Powered Systems (Personal Digital Assistants,

Medical Instruments, Mobile Communications)

Pen Computers

Instrumentation and Control Systems

High-Speed Modems

CLKIN

REF2

CONVST

SAR AND ADC

CONTROL

CALIBRATION

MEMORY AND

CONTROLLER

BUSY

CAL

SLEEP

GENERAL DESCRIPTION

SERIAL INTERFACE/CONTROL REGISTER

The AD7858/AD7858L are high-speed, low-power, 12-bit

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

AD7858 being optimized for speed and the AD7858L 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 have a

number of power-down options for low-power applications.

The part powers up with a set of default conditions and can

operate as a read-only ADC.

DIN

DOUT

SCLK

SYNC

PRODUCT HIGHLIGHTS

1. Specified for 3 V and 5 V supplies.

2. Automatic calibration on power-up.

3. Flexible power management options including automatic

power-down after conversion.

The AD7858 is capable of 200 kHz throughput rate while the

AD7858L 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 AD7858/AD7858L

voltage range is 0 to V_REFwith straight binary output coding.

Input signal range is to the supply and the part is capable of con-

verting full power signals to 100 kHz.

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. System and self-calibration.

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

9. Lower power version AD7858L.

CMOS construction ensures low power dissipation of typically

4.5 mW for normal operation and 1.15 mW in power-down

mode with a throughput rate of 10 kSPS (V_DD= 3 V). 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.

See page 31 for data sheet index.

SPI and QSPI are trademarks of Motorola, Inc.

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AD7858_15相关器件

型号	品牌	获取价格	描述	数据表
AD7858AN	ADI	获取价格	3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADC
AD7858ANZ	ADI	获取价格	暂无描述
AD7858AR	ADI	获取价格	3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADC
AD7858AR-REEL	ADI	获取价格	3 V to 5 V Single Supply, 200 kSPS, 8-Channel, 12-Bit, Serial Sampling ADC
AD7858ARZ	ADI	获取价格	3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADC
AD7858ARZ-REEL	ADI	获取价格	3 V to 5 V Single Supply, 200 kSPS, 8-Channel, 12-Bit, Serial Sampling ADC
AD7858BN	ADI	获取价格	3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADC
AD7858BNZ	ROCHESTER	获取价格	8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP24, 0.300 INCH, PLASTIC, DIP-
AD7858BR	ADI	获取价格	3 V to 5 V Single Supply, 200 kSPS 8-Channel, 12-Bit Sampling ADC
AD7858BR-REEL	ADI	获取价格	IC 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24, SOIC-24, Analog to Dig

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