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ADT6502ARJP055

更新时间： 2024-02-11 23:01:07
品牌 Logo 应用领域
亚德诺 - ADI 开关传感器换能器
页数 文件大小 规格书
16页 259K
描述
Low Cost, 2.7 V to 5.5 V, Micropower Temperature Switches in SOT-23

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ADT6502ARJP055 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
包装说明：TSOP5/6,.11,37Reach Compliance Code：unknown
风险等级：5.92安装特点：SURFACE MOUNT
端子数量：5最大工作电流：0.085 mA
最高工作温度：125 °C最低工作温度：-55 °C
封装主体材料：PLASTIC/EPOXY封装等效代码：TSOP5/6,.11,37
封装形状/形式：RECTANGULAR电源：3/5 V
子类别：Other Sensors表面贴装：YES
Base Number Matches：1

ADT6502ARJP055 数据手册

 浏览型号ADT6502ARJP055的Datasheet PDF文件第7页浏览型号ADT6502ARJP055的Datasheet PDF文件第8页浏览型号ADT6502ARJP055的Datasheet PDF文件第9页浏览型号ADT6502ARJP055的Datasheet PDF文件第11页浏览型号ADT6502ARJP055的Datasheet PDF文件第12页浏览型号ADT6502ARJP055的Datasheet PDF文件第13页 
ADT6501/ADT6502/ADT6503/ADT6504  
Preliminary Technical Data  
APPLICATION INFORMATION  
THERMAL RESPONSE TIME  
SUPPLY DECOUPLING  
The time required for a temperature sensor to settle to a  
specified accuracy is a function of the thermal mass of the  
sensor and the thermal conductivity between the sensor and the  
object being sensed. Thermal mass is often considered  
equivalent to capacitance. Thermal conductivity is commonly  
specified using the symbol Q, and can be thought of as thermal  
resistance. It is commonly specified in units of degrees per watt  
of power transferred across the thermal joint. Thus, the time  
required for the ADT6501/ADT6502/ADT6503/ADT6504 to  
settle to the desired accuracy is dependent on the characteristics  
of the SOT-23 package, the thermal contact established in that  
particular application, and the equivalent power of the heat  
source. In most applications, the settling time is probably best  
determined empirically.  
The ADT6501/ADT6502/ADT6503/ADT6504 should be  
decoupled with a 0.1 μF ceramic capacitor between VDD and  
GND. This is particularly important when the ADT650x are  
mounted remotely from the power supply. Precision analog  
products, such as the ADT650x, require a well-filtered power  
source. Because the ADT650x operate from a single supply, it  
might seem convenient to tap into the digital logic power  
supply.  
Unfortunately, the logic supply is often a switch-mode design,  
which generates noise in the 20 kHz to 1 MHz range. In  
addition, fast logic gates can generate glitches hundreds of mV  
in amplitude due to wiring resistance and inductance.  
If possible, the ADT650x should be powered directly from the  
system power supply. This arrangement, shown in Figure 19,  
isolates the analog section from the logic switching transients.  
Even if a separate power supply trace is not available, generous  
supply bypassing reduces supply line induced errors. Local  
supply bypassing consisting of a 0.1 μF ceramic capacitor is  
advisable for the temperature accuracy specifications to be  
achieved. This decoupling capacitor must be placed as close as  
possible to the ADT650x VCC pin.  
SELF-HEATING EFFECTS  
The temperature measurement accuracy of the  
ADT6501/ADT6502/ADT6503/ADT6504 can be degraded in  
some applications due to self-heating. Errors can be introduced  
from the quiescent dissipation and power dissipated when  
converting. The magnitude of these temperature errors is  
dependent on the thermal conductivity of the ADT650x  
package, the mounting technique, and the effects of airflow. At  
25°C, static dissipation in the ADT650x is typically TBD μW  
operating at 3.3 V. In the 5-lead SOT-23 package mounted in  
free air, this accounts for a temperature increase due to self-  
heating of  
TTL/CMOS  
LOGIC  
CIRCUITS  
0.1µF  
ADT650x  
ꢀT = PDISS × θJA = TBD μW × 240°C/W = TBD°C  
POWER  
SUPPLY  
It is recommended that current dissipated through the device be  
kept to a minimum, because it has a proportional effect on the  
temperature error.  
Figure 19. Use Separate Traces to Reduce Power Supply Noise  
Rev. PrA | Page 1± of 16  
 
 
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