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AD22100SR-REEL7

更新时间： 2024-02-19 08:06:21
品牌 Logo 应用领域
亚德诺 - ADI 传感器温度传感器
页数 文件大小 规格书
12页 190K
描述
Voltage Output Temperature Sensor with Signal Conditioning

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AD22100SR-REEL7 技术参数

Source Url Status Check Date：2013-05-01 14:56:09.209是否无铅： 含铅
是否Rohs认证： 不符合生命周期：Obsolete
包装说明：SOP8,.25针数：8
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.22
主体宽度：3.9 mm主体高度：1.55 mm
主体长度或直径：4.9 mm外壳：PLASTIC
JESD-609代码：e0安装特点：SURFACE MOUNT
端子数量：8最高工作温度：150 °C
最低工作温度：-55 °C最大输出电压：4.75 V
最小输出电压：0.25 V封装主体材料：PLASTIC/EPOXY
封装等效代码：SOP8,.25封装形状/形式：RECTANGULAR
电源：5 V传感器/换能器类型：TEMPERATURE SENSOR,ANALOG,VOLTAGE OUTPUT
子类别：Other Sensors最大供电电压：6.5 V
最小供电电压：4 V表面贴装：YES
端子面层：Tin/Lead (Sn85Pb15)端接类型：SOLDER
Base Number Matches：1

AD22100SR-REEL7 数据手册

 浏览型号AD22100SR-REEL7的Datasheet PDF文件第6页浏览型号AD22100SR-REEL7的Datasheet PDF文件第7页浏览型号AD22100SR-REEL7的Datasheet PDF文件第8页浏览型号AD22100SR-REEL7的Datasheet PDF文件第10页浏览型号AD22100SR-REEL7的Datasheet PDF文件第11页浏览型号AD22100SR-REEL7的Datasheet PDF文件第12页 
AD22100  
Response of the AD22100 output to abrupt changes in ambient  
temperature can be modeled by a single time constant t expo-  
nential function. Figure 10 shows the typical response time  
plots for a few media of interest.  
MICROPROCESSOR A/D INTERFACE ISSUES  
The AD22100 is especially well suited to providing a low cost  
temperature measurement capability for microprocessor/  
microcontroller based systems. Many inexpensive 8-bit micro-  
processors now offer an onboard 8-bit ADC capability at a  
modest cost premium. Total cost of ownership then becomes a  
function of the voltage reference and analog signal conditioning  
necessary to mate the analog sensor with the microprocessor  
ADC. The AD22100 can provide an ideal low cost system by  
eliminating the need for a precision voltage reference and any  
additional active components. The ratiometric nature of the  
AD22100 allows the microprocessor to use the same power  
supply as its ADC reference. Variations of hundreds of mil-  
livolts in the supply voltage have little effect as both the  
AD22100 and the ADC use the supply as their reference. The  
nominal AD22100 signal range of 0.25 V to 4.75 V (−50°C to  
+150°C) makes good use of the input range of a 0 V to 5 V  
ADC. A single resistor and capacitor are recommended to pro-  
vide immunity to the high speed charge dump glitches seen at  
many microprocessor ADC inputs (see Figure 2).  
100  
ALUMINUM  
90  
BLOCK  
MOVING  
AIR  
80  
70  
60  
50  
40  
30  
20  
10  
0
STILL AIR  
0
10  
20  
30  
40  
50  
60  
70  
80  
90 100  
TIME (sec)  
Figure 10. Response Time  
The time constant t is dependent on θJA and the thermal capaci-  
ties of the chip and the package. Table 6 lists the effective t (time  
to reach 63.2% of the final value) for a few different media.  
Copper printed circuit board connections were neglected in the  
analysis; however, they will sink or conduct heat directly  
through the AD22100’s solder plated copper leads. When faster  
response is required, a thermally conductive grease or glue  
between the AD22100 and the surface temperature being  
measured should be used.  
An 8-bit ADC with a reference of 5 V will have a least signifi-  
cant bit (LSB) size of 5 V/256 = 19.5 mV. This corresponds to a  
nominal resolution of about 0.87°C.  
USE WITH A PRECISION REFERENCE AS THE SUPPLY  
VOLTAGE  
While the ratiometric nature of the AD22100 allows for system  
operation without a precision voltage reference, it can still be  
used in such systems. Overall system requirements involving  
other sensors or signal inputs may dictate the need for a fixed  
precision ADC reference. The AD22100 can be converted to  
absolute voltage operation by using a precision reference as the  
supply voltage. For example, a 5.00 V reference can be used to  
power the AD22100 directly. Supply current will typically be  
500 µA, which is usually within the output capability of the  
reference. Using a large number of AD22100s may require an  
additional op amp buffer, as would scaling down a 10.00 V ref-  
erence that might be found in instrumentation ADCs typically  
operating from 15 V supplies.  
1 The time constant t is defined as the time to reach 63.2% of the final  
temperature change.  
2 12±± CFM.  
Rev. D | Page 9 of 12  
 
 
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