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AD7945_15

更新时间： 2024-12-01 01:14:11
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
16页 333K
描述
3.3 V/5 V Multiplying 12-Bit DACs

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AD7945_15 数据手册

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+3.3 V/+5 V Multiplying  
12-Bit DACs  
a
AD7943/AD7945/AD7948  
FUNCTIONAL BLOCK DIAGRAMS  
FEATURES  
12-Bit Multiplying DACs  
V
R
FB  
DD  
Guaranteed Specifications with +3.3 V/+5 V Supply  
0.5 LSBs INL and DNL  
Low Power: 5 ␮W typ  
AD7943  
I
I
OUT1  
12-BIT DAC  
V
REF  
OUT2  
Fast Interface  
CLR  
LD1  
LD2  
AGND  
SRO  
40 ns Strobe Pulsewidth (AD7943)  
40 ns Write Pulsewidth (AD7945, AD7948)  
Low Glitch: 60 nV-s with Amplifier Connected  
Fast Settling: 600 ns to 0.01% with AD843  
DAC REGISTER  
INPUT SHIFT REGISTER  
SRI  
APPLICATIONS  
Battery-Powered Instrumentation  
Laptop Computers  
Upgrades for All 754x Series DACs (5 V Designs)  
STB1 STB2  
STB4 DGND  
STB3  
V
R
DD  
FB  
GENERAL DESCRIPTION  
AD7945  
I
OUT1  
The AD7943, AD7945 and AD7948 are fast 12-bit multiplying  
DACs that operate from a single +5 V supply (Normal Mode)  
and a single +3.3 V to +5 V supply (Biased Mode). The  
AD7943 has a serial interface, the AD7945 has a 12-bit parallel  
interface, and the AD7948 has an 8-bit byte interface. They will  
replace the industry-standard AD7543, AD7545 and AD7548  
in many applications, and they offer superior speed and power  
consumption performance.  
12-BIT DAC  
12  
V
REF  
AGND  
CS  
WR  
INPUT LATCH  
12  
DB11–DB0  
DGND  
R
V
FB  
DD  
The AD7943 is available in 16-lead DIP, 16-lead SOP (Small  
Outline Package) and 20-lead SSOP (Shrink Small Outline  
Package).  
I
OUT1  
V
12-BIT DAC  
12  
REF  
AGND  
AD7948  
The AD7945 is available in 20-lead DIP, 20-lead SOP and 20-  
lead SSOP.  
DF/DOR  
DATA OVERRIDE LOGIC  
12  
CTRL  
The AD7948 is available in 20-lead DIP, 20-lead SOP and 20-  
lead SSOP.  
DAC REGISTER  
LDAC  
WR  
12  
CONTROL  
LOGIC  
INPUT REGISTERS  
CSLSB  
CSMSB  
12  
DATA STEERING LOGIC  
8
DB7–DB0  
DGND  
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  
Fax: 781/326-8703  
World Wide Web Site: http://www.analog.com  
© Analog Devices, Inc., 1998  
1234567...16

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