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AD7537SQ PDF预览

AD7537SQ

更新时间: 2024-09-30 22:53:31
品牌 Logo 应用领域
亚德诺 - ADI 转换器数模转换器信息通信管理
页数 文件大小 规格书
8页 209K
描述
LC2MOS (8+4) Loading Dual 12-Bit DAC

AD7537SQ 数据手册

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2
LC MOS  
(8+4) Loading Dual 12-Bit DAC  
a
AD7537  
FUNCTIO NAL BLO CK D IAGRAM  
FEATURES  
Tw o 12-Bit DACs in One Package  
DAC Ladder Resistance Matching: 0.5%  
Space Saving Skinny DIP and Surface Mount Packages  
4-Quadrant Multiplication  
Low Gain Error (1 LSB m ax Over Tem perature)  
Byte Loading Structure  
Fast Interface Tim ing  
APPLICATIONS  
Autom atic Test Equipm ent  
Program m able Filters  
Audio Applications  
Synchro Applications  
Process Control  
GENERAL D ESCRIP TIO N  
T he AD7537 contains two 12-bit current output DACs on one  
monolithic chip. A separate reference input is provided for each  
DAC. T he dual DAC saves valuable board space, and the  
monolithic construction ensures excellent thermal tracking.  
Both DACs are guaranteed 12-bit monotonic over the full tem-  
perature range.  
T he AD7537 has a 2-byte (8 LSBs, 4 MSBs) loading structure.  
It is designed for right-justified data format. T he control signals  
for register loading are A0, A1, CS, WR and UPD. Data is  
loaded to the input registers when CS and WR are low. T o  
transfer this data to the DAC registers, UPD must be taken low  
with WR.  
P RO D UCT H IGH LIGH TS  
1. DAC to DAC Matching:  
Since both DACs are fabricated on the same chip, precise  
matching and tracking is inherent. Many applications which  
are not practical using two discrete DACs are now possible.  
T ypical matching: 0.5%.  
Added features on the AD7537 include an asynchronous CLR  
line which is very useful in calibration routines. When this is  
taken low, all registers are cleared. T he double buffering of the  
data inputs allows simultaneous update of both DACs. Also,  
each DAC has a separate AGND line. T his increases the device  
versatility; for instance one DAC may be operated with  
AGND biased while the other is connected in the standard  
configuration.  
2. Small Package Size:  
T he AD7537 is packaged in small 24-pin 0.3" DIPs and in  
28-terminal surface mount packages.  
3. Wide Power Supply T olerance:  
T he device operates on a +12 V to +15 V VDD, with ±10%  
tolerance on this nominal figure. All specifications are  
guaranteed over this range.  
T he AD7537 is manufactured using the Linear Compatible  
CMOS (LC2MOS) process. It is speed compatible with most  
microprocessors and accepts T T L, 74HC and 5 V CMOS logic  
level inputs.  
REV. 0  
Inform ation furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assum ed by Analog Devices for its  
use, nor for any infringem ents of patents or other rights of third parties  
which m ay result from its use. No license is granted by im plication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.  
Tel: 617/ 329-4700  
Fax: 617/ 326-8703  

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