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ADC912A

更新时间： 2024-01-30 16:52:51
品牌 Logo 应用领域
亚德诺 - ADI 转换器微处理器
页数 文件大小 规格书
16页 235K
描述
CMOS Microprocessor-Compatible 12-Bit A/D Converter

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中文翻译

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ADC912A 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：DIP包装说明：0.300 INCH, PLASTIC, DIP-24
针数：24Reach Compliance Code：not_compliant
HTS代码：8542.39.00.01风险等级：5.89
最大模拟输入电压：10 V最小模拟输入电压：
最长转换时间：13.5 µs转换器类型：ADC, SUCCESSIVE APPROXIMATION
JESD-30 代码：R-PDIP-T24JESD-609代码：e0
长度：30.45 mm最大线性误差 (EL)：0.0244%
标称负供电电压：-15 V模拟输入通道数量：1
位数：12功能数量：1
端子数量：24最高工作温度：70 °C
最低工作温度：输出位码：BINARY, OFFSET BINARY
输出格式：PARALLEL, WORD封装主体材料：PLASTIC/EPOXY
封装代码：DIP封装等效代码：DIP24,.3
封装形状：RECTANGULAR封装形式：IN-LINE
峰值回流温度（摄氏度）：NOT SPECIFIED电源：5,-12/-15 V
认证状态：Not Qualified座面最大高度：5.33 mm
子类别：Analog to Digital Converters最大压摆率：7 mA
标称供电电压：5 V表面贴装：NO
技术：CMOS温度等级：COMMERCIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：THROUGH-HOLE
端子节距：2.54 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：7.62 mm
Base Number Matches：1

ADC912A 数据手册

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CMOS Microprocessor-Compatible  
12-Bit A/D Converter  
a
ADC912A  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
Low Cost  
V
A
IN  
AGND  
REFIN  
Low Transition Noise between Code  
12-Bit Accurate  
؎1/2 LSB Nonlinearity Error over Temperature  
No Missing Codes at All Temperatures  
10 ␮s Conversion Time  
5k⍀  
V
DD  
12-BIT DAC  
V
SS  
ADC912A  
SUCCESSIVE  
APPROXIMATION  
REGISTER  
Internal or External Clock  
8- or 16-Bit Data Bus Compatible  
Improved ESD Resistant Design  
Latchup Resistant Epi-CMOS Processing  
Low 95 mW Power Consumption  
Space-Saving 24-Lead 0.3" DIP, or 24-Lead SOIC  
12-BIT LATCH  
BUSY  
CS  
4
8
CONTROL  
LOGIC  
RD  
MULTIPLEXER  
8
HBEN  
APPLICATIONS  
CLK OUT  
CLK IN  
THREE-STATE  
OUTPUT  
DRIVERS  
THREE-STATE  
OUTPUT  
Data Acquisition Systems  
DSP System Front End  
Process Control Systems  
Portable Instrumentation  
CLOCK  
OSCILLATOR  
DRIVERS  
D
D
D
D
DGND D D  
3/11 0/8  
11  
8
7
4
GENERAL DESCRIPTION  
not located at a transition voltage, see Figures 1 and 2. NPN  
digital output transistors provide excellent bus interface timing,  
125 ns access and bus disconnect time which results in faster  
data transfer without the need for wait states. An external  
1.25 MHz clock provides a 10 µs conversion time.  
The ADC912A is a monolithic 12-bit accurate CMOS A/D  
converter. It contains a complete successive-approximation A/D  
converter built with a high-accuracy D/A converter, a precision  
bipolar transistor high-speed comparator, and successive-  
approximation logic including three-state bus interface for logic  
compatibility. The accuracy of the ADC912A results from the  
addition of precision bipolar transistors to Analog Devices’  
advanced-oxide isolated silicon-gate CMOS process. Particular  
attention was paid to the reduction of transition noise between  
adjacent codes achieving a 1/6 LSB uncertainty. The low noise  
design produces the same digital output for dc analog inputs  
In stand-alone applications an internal clock can be used with  
external crystal.  
An external negative five-volt reference sets the 0 V to 10 V  
input range. Plus 5 V and minus 12 V power supplies result in  
95 mW of total power consumption.  
256  
256 SUCCESSIVE  
CONVERSIONS  
100  
90  
WITH  
192  
128  
64  
A
= 4.99756V  
IN  
10  
0%  
TRANSITION NOISE  
0
2045 2046 2047 2048 2049  
OUTPUT CODE – Decimal  
ANALOG INPUT  
Figure 2. Transition Noise Cross Plot  
Figure 1. Code Repetition  
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, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat  
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  
www.analog.com  
© Analog Devices, Inc., 2001  
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中文翻译

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