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DDC112UK/1KG4 PDF预览

DDC112UK/1KG4

更新时间： 2024-10-28 14:27:39
品牌 Logo 应用领域
德州仪器 - TI 光电二极管转换器
页数 文件大小 规格书
34页 1158K
描述
2-CH 20-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, GREEN, PLASTIC, SOIC-28

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DDC112UK/1KG4 技术参数

是否Rohs认证：符合生命周期：Obsolete
零件包装代码：SOIC包装说明：GREEN, PLASTIC, SOIC-28
针数：28Reach Compliance Code：unknown
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.14Is Samacsys：N
最大模拟输入电压：最长转换时间：220 µs
转换器类型：ADC, DELTA-SIGMAJESD-30 代码：R-PDSO-G28
长度：17.9 mm最大线性误差 (EL)：0.025%
模拟输入通道数量：2位数：20
功能数量：1端子数量：28
最高工作温度：70 °C最低工作温度：
输出位码：BINARY输出格式：SERIAL
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装等效代码：SOP28,.4封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：NOT SPECIFIED
电源：5 V认证状态：Not Qualified
采样速率：0.003 MHz座面最大高度：2.65 mm
子类别：Analog to Digital Converters标称供电电压：5 V
表面贴装：YES技术：CMOS
温度等级：COMMERCIAL端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：7.5 mm
Base Number Matches：1

DDC112UK/1KG4 数据手册

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®
D
D
C1  
DDC112  
12  
D
®
D
C
11  
2
SBAS085B – JANUARY 2000 – REVISED OCTOBER 2004  
Dual Current Input 20-Bit  
ANALOG-TO-DIGITAL CONVERTER  
FEATURES  
DESCRIPTION  
ꢀ MONOLITHIC CHARGE MEASUREMENT A/D  
The DDC112 is a dual input, wide dynamic range, charge-  
digitizing analog-to-digital (A/D) converter with 20-bit resolu-  
tion. Low-level current output devices, such as photosensors,  
can be directly connected to its inputs. Charge integration is  
continuous as each input uses two integrators; while one is  
being digitized, the other is integrating.  
CONVERTER  
ꢀ DIGITAL FILTER NOISE REDUCTION:  
3.2ppm, rms  
ꢀ INTEGRAL LINEARITY:  
±0.005% Reading ±0.5ppm FSR  
For each of its two inputs, the DDC112 combines current-to-  
voltage conversion, continuous integration, programmable  
full-scale range, A/D conversion, and digital filtering to achieve  
a precision, wide dynamic range digital result. In addition to  
the internal programmable full-scale ranges, external integrat-  
ing capacitors allow an additional user-settable full-scale  
range of up to 1000pC.  
ꢀ HIGH PRECISION, TRUE INTEGRATING FUNC-  
TION  
ꢀ PROGRAMMABLE FULL-SCALE  
ꢀ SINGLE SUPPLY  
ꢀ CASCADABLE OUTPUT  
To provide single-supply operation, the internal A/D converter  
APPLICATIONS  
ꢀ DIRECT PHOTOSENSOR DIGITIZATION  
utilizes a differential input, with the positive input tied to VREF  
.
When the integration capacitor is reset at the beginning of  
each integration cycle, the capacitor charges to VREF. This  
charge is removed in proportion to the input current. At the  
end of the integration cycle, the remaining voltage is com-  
ꢀ CT SCANNER DAS  
ꢀ INFRARED PYROMETER  
ꢀ PRECISION PROCESS CONTROL  
ꢀ LIQUID/GAS CHROMATOGRAPHY  
ꢀ BLOOD ANALYSIS  
pared to VREF.  
The high-speed serial shift register which holds the result of  
the last conversion can be configured to allow multiple DDC112  
units to be cascaded, minimizing interconnections. The  
DDC112 is available in an SO-28 or TQFP-32 package and is  
offered in two performance grades.  
Protected by US Patent #5841310  
AVDD  
AGND  
VREF  
DVDD DGND  
CAP1A  
CAP1A  
CHANNEL 1  
DCLK  
IN1  
Dual  
Switched  
Integrator  
DVALID  
CAP1B  
CAP1B  
∆Σ  
Modulator  
DXMIT  
DOUT  
DIN  
Digital  
Filter  
Digital  
Input/Output  
CAP2A  
CAP2A  
CHANNEL 2  
RANGE2  
RANGE1  
RANGE0  
IN2  
Control  
Dual  
Switched  
Integrator  
CAP2B  
CAP2B  
TEST  
CLK  
CONV  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
Copyright © 2000-2004, Texas Instruments Incorporated  
www.ti.com  
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DDC112UK/1KG4 替代型号

型号 品牌 替代类型 描述 数据表
DDC112UK TI

完全替代

 Dual Current Input 20-Bit ANALOG-TO-DIGITAL CONVERTER
DDC112UK/1K TI

完全替代

 Dual Current Input 20-Bit ANALOG-TO-DIGITAL CONVERTER

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