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EVAL-AD7841EBZ

更新时间： 2024-11-24 12:55:31
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
13页 442K
描述
Octal 14-Bit, Parallel Input, Voltage-Output DAC

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Octal 14-Bit, Parallel Input,  
Voltage-Output DAC  
a
AD7841  
GENERAL DESCRIPTION  
FEATURES  
The AD7841 contains eight 14-bit DACs on one monolithic  
chip. It has output voltages with a full-scale range of 10 V  
from reference voltages of 5 V.  
Eight 14-Bit DACs in One Package  
Voltage Outputs  
Offset Adjust for Each DAC Pair  
Reference Range of ꢀ5 V  
Maximum Output Voltage Range of ꢀ10 V  
ꢀ15 V ꢀ 10% Operation  
The AD7841 accepts 14-bit parallel loaded data from the exter-  
nal bus into one of the input registers under the control of the  
WR, CS, and DAC channel address pins, A0–A2.  
Clear Function to User-Defined Voltage  
44-Lead MQFP Package  
The DAC outputs are updated on reception of new data into  
the DAC registers. All the outputs may be updated simulta-  
neously by taking the LDAC input low.  
APPLICATIONS  
Automatic Test Equipment  
Process Control  
General Purpose Instrumentation  
Each DAC output is buffered with a gain-of-two amplifier into  
which an external DAC offset voltage can be inserted via the  
DUTGNDx pins.  
The AD7841 is available in a 44-lead MQFP package.  
FUNCTIONAL BLOCK DIAGRAM  
V
(+)  
V
(–)  
AB  
DUTGND  
CD  
DUTGND  
AB  
REF  
AB  
REF  
V
V
V
DD  
CC  
SS  
AD7841  
R
R
14  
14  
14  
14  
14  
14  
14  
14  
14  
14  
14  
14  
14  
14  
14  
14  
14  
INPUT  
REG  
A
DAC  
REG  
A
DAC A  
V
A
B
OUT  
R
R
DB13  
DB0  
14  
14  
14  
14  
14  
14  
14  
DAC  
REG  
B
INPUT  
REG  
B
DAC B  
V
OUT  
R
R
R
INPUT  
REG  
C
DAC  
REG  
C
DAC C  
V
C
D
OUT  
WR  
CS  
R
INPUT  
REG  
D
DAC  
REG  
D
DAC D  
V
OUT  
A0  
A1  
INPUT  
REG  
E
DAC  
REG  
E
DAC E  
A2  
V
E
F
OUT  
LDAC  
R
R
R
R
INPUT  
REG  
F
DAC  
REG  
F
DAC F  
V
OUT  
INPUT  
REG  
G
DAC  
REG  
G
DAC G  
V
G
H
OUT  
R
R
INPUT  
REG  
H
DAC  
REG  
H
R
DAC H  
V
OUT  
R
V
(+) V  
(–)  
V
(+) V  
(–)  
CDEF CDEF  
GND  
DUTGND DUTGND  
CLR  
REF  
GH  
REF  
GH  
REF  
REF  
EF  
GH  
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  
www.analog.com  
© 1999-2011 Analog Devices, Inc. All rights reserved.  
Fax: 781/461-3113  
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