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AD7854SQ

更新时间： 2024-11-03 22:38:35
品牌 Logo 应用领域
亚德诺 - ADI 转换器模数转换器
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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AD7854SQ 数据手册

 浏览型号AD7854SQ的Datasheet PDF文件第2页浏览型号AD7854SQ的Datasheet PDF文件第3页浏览型号AD7854SQ的Datasheet PDF文件第4页浏览型号AD7854SQ的Datasheet PDF文件第5页浏览型号AD7854SQ的Datasheet PDF文件第6页浏览型号AD7854SQ的Datasheet PDF文件第7页 
3 V to 5 V Single Supply, 200 kSPS  
12-Bit Sampling ADCs  
a
AD7854/AD7854L*  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
AV  
DD  
AGND  
Specified for VDD of 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  
DV  
DD  
2.5V  
REFERENCE  
Normal Operation  
AD7854: 15 mW (VDD = 3 V)  
AD7854L: 5.5 mW (VDD = 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  
IN  
/
BUF  
REF  
OUT  
DGND  
CLKIN  
C
REF1  
CHARGE  
REDISTRIBUTION  
DAC  
12-Bit Parallel/8-Bit Parallel (AD7854)  
28-Lead DIP, SOIC and SSOP Packages (AD7854)  
SAR + ADC  
CONTROL  
CONVST  
C
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  
CS  
WR  
DB11–DB0  
RD  
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 AVDD  
4. Analog input ranges from 0 V to AVDD  
.
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 VREF (unipolar) and –VREF/2 to +VREF/2,  
centered at VREF/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  
© Analog Devices, Inc., 2000  
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AD7854SQ 替代型号

型号 品牌 替代类型 描述 数据表
AD7854AR-REEL ADI

完全替代

 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO28, SOIC-28
AD7854ARS-REEL ADI

完全替代

 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO28, SSOP-28
AD7854LAQ ADI

类似代替

 3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs

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