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AD7856ARS

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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5 V Single Supply, 8-Channel  
14-Bit 285 kSPS Sampling ADC  
a
AD7856  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
Single 5 V Supply  
285 kSPS Throughput Rate  
AGND  
AV  
DD  
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  
DV  
DD  
AIN1  
AIN8  
I/P  
MUX  
AD7856  
T/H  
4.096V  
REFERENCE  
COMP  
DGND  
REF /REF  
BUF  
IN  
OUT  
APPLICATIONS  
C
REF1  
Battery-Powered Systems (Personal Digital Assistants,  
Medical Instruments, Mobile Communications)  
Pen Computers  
CHARGE  
REDISTRIBUTION  
DAC  
Instrumentation and Control Systems  
High Speed Modems  
CLKIN  
C
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  
VREF with 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 VDD  
5. Analog input range from 0 V to VDD  
.
.
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  
© Analog Devices, Inc., 1998  
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AD7856ARS 替代型号

型号 品牌 替代类型 描述 数据表
AD7856ARS-REEL ADI

完全替代

 IC 8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24, SHRINK, SOP-24, Analog
AD7856AR-REEL7 ADI

完全替代

 IC 8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24, SOIC-24, Analog to Dig
AD7856ARZ-REEL7 ADI

完全替代

 IC 8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24, SOIC-24, Analog to Dig

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 		8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24, SOIC-24
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