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AD592

更新时间： 2024-01-02 05:26:32
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
8页 305K
描述
Low Cost, Precision IC Temperature Transducer

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AD592 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active包装说明：SIP3,.1,50
针数：3Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：0.87最大精度（摄氏度）：0.15 Cel
主体宽度：4.06 mm主体高度：4.85 mm
主体长度或直径：5.08 mm外壳：PLASTIC
JESD-609代码：e3线性度（Cel）：0.15 Cel
安装特点：THROUGH HOLE MOUNT端子数量：3
最高工作温度：105 °C最低工作温度：-25 °C
输出电流标称：298.2 µA封装主体材料：PLASTIC/EPOXY
封装等效代码：SIP3,.1,50封装形状/形式：ROUND
电源：5 V传感器/换能器类型：TEMPERATURE SENSOR,ANALOG,RESISTANCE BASED
子类别：Other Sensors最大供电电压：30 V
最小供电电压：4 V表面贴装：NO
端子面层：Matte Tin (Sn)端接类型：SOLDER
Base Number Matches：1

AD592 数据手册

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AD592  
+15V  
+5V  
Response of the AD592 output to abrupt changes in ambient  
temperature can be modeled by a single time constant τ expo-  
nential function. Figure 8 shows typical response time plots for  
several media of interest.  
AD592  
AD592  
AD592  
AD592  
100  
C
A
D
B
90  
80  
70  
60  
50  
40  
30  
20  
10  
333.3Ω  
(0.1%)  
V
(1mV/K)  
TAVG  
10kΩ  
(0.1%)  
E
V
(10mV/K)  
TAVG  
F
A ALUMINUM BLOCK  
B FLUORINERT LIQUID  
C MOVING AIR (WITH HEAT SINK)  
D MOVING AIR (WITHOUT HEAT SINK)  
E STILL AIR (WITH HEAT SINK)  
F STILL AIR (WITHOUT HEAT SINK)  
Figure 9. Average and Minimum Temperature  
Connections  
The circuit of Figure 10 demonstrates a method in which a  
voltage output can be derived in a differential temperature  
measurement.  
0
20 40 60 80 100 120 140 160 180 200 220 240 260 280 300  
TIME – sec  
+V  
10kΩ  
Figure 8. Thermal Response Curves  
AD592  
AD741  
The time constant, τ, is dependent on θJA and the thermal ca-  
pacities of the chip and the package. Table I lists the effective τ  
(time to reach 63.2% of the final value) for several different  
media. Copper printed circuit board connections where ne-  
glected in the analysis, however, they will sink or conduct heat  
directly through the AD592’s solder dipped Kovar leads. When  
faster response is required a thermally conductive grease or glue  
between the AD592 and the surface temperature being mea-  
sured should be used. In free air applications a clip-on heat sink  
will decrease output stabilization time by 10-20%.  
5MΩ  
R1  
50kΩ  
AD592  
V
= (T – T ) x  
1 2  
OUT  
(10mV/ C)  
o
10kΩ  
–V  
Figure 10. Differential Measurements  
R1 can be used to trim out the inherent offset between the two  
devices. By increasing the gain resistor (10 kΩ) temperature  
measurements can be made with higher resolution. If the magni-  
tude of V+ and V– is not the same, the difference in power con-  
sumption between the two devices can cause a differential  
self-heating error.  
MOUNTING CONSIDERATIONS  
If the AD592 is thermally attached and properly protected, it  
can be used in any temperature measuring situation where the  
maximum range of temperatures encountered is between –25°C  
and +105°C. Because plastic IC packaging technology is em-  
ployed, excessive mechanical stress must be safeguarded against  
when fastening the device with a clamp or screw-on heat tab.  
Thermally conductive epoxy or glue is recommended under  
typical mounting conditions. In wet or corrosive environments,  
any electrically isolated metal or ceramic well can be used to  
shield the AD592. Condensation at cold temperatures can cause  
leakage current related errors and should be avoided by sealing  
the device in nonconductive epoxy paint or dips.  
Cold junction compensation (CJC) used in thermocouple signal  
conditioning can be implemented using an AD592 in the circuit  
configuration of Figure 11. Expensive simulated ice baths or  
hard to trim, inaccurate bridge circuits are no longer required.  
THERMOCOUPLE  
TYPE  
APPROX.  
R VALUE  
J
52Ω  
41Ω  
41Ω  
61Ω  
6Ω  
+7.5V  
K
T
E
S
R
2.5V  
AD1403  
6Ω  
MEASURING  
JUNCTION  
10kΩ  
APPLICATIONS  
AD OP07E  
1kΩ  
Cu  
V
Connecting several AD592 devices in parallel adds the currents  
through them and produces a reading proportional to the aver-  
age temperature. Series AD592s will indicate the lowest tem-  
perature because the coldest device limits the series current  
flowing through the sensors. Both of these circuits are depicted  
in Figure 9.  
OUT  
100kΩ  
AD592  
R
G2  
REFERENCE  
JUNCTION  
R
(1kΩ)  
G1  
Cu  
R
Figure 11. Thermocouple Cold Junction Compensation  
–6–  
REV. A  
1...345678

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