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EVAL-AD7401EB

更新时间: 2024-12-01 05:20:43
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
20页 463K
描述
Isolated Sigma-Delta Modulator

EVAL-AD7401EB 数据手册

 浏览型号EVAL-AD7401EB的Datasheet PDF文件第2页浏览型号EVAL-AD7401EB的Datasheet PDF文件第3页浏览型号EVAL-AD7401EB的Datasheet PDF文件第4页浏览型号EVAL-AD7401EB的Datasheet PDF文件第5页浏览型号EVAL-AD7401EB的Datasheet PDF文件第6页浏览型号EVAL-AD7401EB的Datasheet PDF文件第7页 
Isolated Sigma-Delta Modulator  
AD7401  
FEATURES  
GENERAꢀ DESCRIPTION  
20 MHz maximum external clock rate  
Second-order modulator  
16 bits no missing codes  
2 ꢀSB INꢀ typical at 16 bits  
3.5 μV/°C maximum offset drift  
On-board digital isolator  
The AD74011 is a second-order, Σ-Δ modulator that converts  
an analog input signal into a high speed, 1-bit data stream with  
on-chip digital isolation based on Analog Devices, Inc.  
iCoupler® technology. The AD7401 operates from a 5 V power  
supply and accepts a differential input signal of ±±00 mV  
(±±0 mV full scale). The analog input is continuously sampled  
by the analog modulator, eliminating the need for external  
sample-and-hold circuitry. The input information is contained  
in the output stream as a density of ones with a data rate up to  
±0 MHz. The original information can be reconstructed with an  
appropriate digital filter. The serial I/O can use a 5 V or a ꢀ V  
supply (VDD±).  
On-board reference  
ꢀow power operation: 20 mA maximum at 5.25 V  
−40°C to +105°C operating range  
16-lead SOIC package  
AD7400, internal clock version  
Safety and regulatory approvals  
Uꢀ recognition  
3750 V rms for 1 minute per Uꢀ 1577  
CSA Component Acceptance Notice #5A  
VDE Certificate of Conformity  
DIN EN 60747-5-2 (VDE 0884 Part 2): 2003-01  
DIN EN 60950 (VDE 0805): 2001-12; EN 60950: 2000  
The serial interface is digitally isolated. High speed CMOS,  
combined with monolithic air core transformer technology,  
means the on-chip isolation provides outstanding performance  
characteristics, superior to alternatives such as optocoupler  
devices. The part contains an on-chip reference. The AD7401  
is offered in a 16-lead SOIC and has an operating temperature  
range of −40°C to +105°C.  
VIORM = 891 V peak  
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. Other patents  
pending.  
APPꢀICATIONS  
AC motor controls  
Data acquisition systems  
A/D + opto-isolator replacements  
FUNCTIONAꢀ BꢀOCK DIAGRAM  
V
V
DD2  
DD1  
AD7401  
V
V
+
IN  
T/H  
Σ-Δ ADC  
IN  
UPDATE  
WATCHDOG  
ENCODE  
DECODE  
BUF  
MDAT  
REF  
CONTROL LOGIC  
WATCHDOG  
UPDATE  
DECODE  
MCLKIN  
ENCODE  
GND  
GND  
1
2
Figure 1.  
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 that may result from its use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2006 Analog Devices, Inc. All rights reserved.  
 

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