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AD7837AR883B PDF预览

AD7837AR883B

更新时间： 2024-12-01 04:30:51
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
13页 196K
描述
LC2MOS Complete, Dual 12-Bit MDACs

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AD7837AR883B 数据手册

 浏览型号AD7837AR883B的Datasheet PDF文件第2页浏览型号AD7837AR883B的Datasheet PDF文件第3页浏览型号AD7837AR883B的Datasheet PDF文件第4页浏览型号AD7837AR883B的Datasheet PDF文件第5页浏览型号AD7837AR883B的Datasheet PDF文件第6页浏览型号AD7837AR883B的Datasheet PDF文件第7页 
LC2MOS  
Complete, Dual 12-Bit MDACs  
a
AD7837/AD7847  
FEATURES  
FUNCTIONAL BLOCK DIAGRAMS  
Two 12-Bit MDACs with Output Amplifiers  
4-Quadrant Multiplication  
V
DD  
Space-Saving 0.3", 24-Lead DIP and 24-Terminal  
SOIC Package  
Parallel Loading Structure: AD7847  
(8 + 4) Loading Structure: AD7837  
MS INPUT  
LATCH  
LS INPUT  
LATCH  
AD7837  
4
8
DAC LATCH A  
R
V
12  
APPLICATIONS  
Automatic Test Equipment  
Function Generation  
Waveform Reconstruction  
Programmable Power Supplies  
Synchro Applications  
FBA  
DAC A  
V
V
OUTA  
REFA  
AGNDA  
REFB  
R
DB0  
DB7  
FBB  
DAC B  
V
OUTB  
LDAC  
CS  
12  
AGNDB  
DAC LATCH B  
CONTROL  
LOGIC  
4
8
WR  
A0  
MS INPUT  
LATCH  
LS INPUT  
LATCH  
GENERAL DESCRIPTION  
A1  
The AD7837/AD7847 is a complete, dual, 12-bit multiplying  
digital-to-analog converter with output amplifiers on a mono-  
lithic CMOS chip. No external user trims are required to  
achieve full specified performance.  
V
V
DGND  
SS  
Both parts are microprocessor compatible, with high speed data  
latches and interface logic. The AD7847 accepts 12-bit parallel  
data which is loaded into the respective DAC latch using the  
WR input and a separate Chip Select input for each DAC. The  
AD7837 has a double-buffered 8-bit bus interface structure  
with data loaded to the respective input latch in two write opera-  
tions. An asynchronous LDAC signal on the AD7837 updates  
the DAC latches and analog outputs.  
DD  
AD7847  
DAC LATCH A  
V
DAC A  
V
OUTA  
REFA  
V
AGNDA  
REFB  
DB0  
The output amplifiers are capable of developing 10 V across a  
2 kΩ load. They are internally compensated with low input off-  
set voltage due to laser trimming at wafer level.  
DB11  
DAC B  
V
OUTB  
WR  
CSA  
CSB  
AGNDB  
CONTROL  
LOGIC  
DAC LATCH B  
The amplifier feedback resistors are internally connected to  
V
OUT on the AD7847.  
The AD7837/AD7847 is fabricated in Linear Compatible CMOS  
(LC2MOS), an advanced, mixed technology process that com-  
bines precision bipolar circuits with low power CMOS logic.  
V
DGND  
SS  
PRODUCT HIGHLIGHTS  
A novel low leakage configuration (U.S. Patent No. 4,590,456)  
ensures low offset errors over the specified temperature range.  
1. The AD7837/AD7847 is a dual, 12-bit, voltage-out MDAC  
on a single chip. This single chip design offers considerable  
space saving and increased reliability over multichip designs.  
2. The AD7837 and the AD7847 provide a fast versatile inter-  
face to 8-bit or 16-bit data bus structures.  
REV. C  
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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