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參數(shù)資料
| 型號(hào)： | LM35CZ |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | Precision Centigrade Temperature Sensors |
| 中文描述： | ANALOG TEMP SENSOR-VOLTAGE, -.55-1.5V, 0.40Cel, ROUND, THROUGH HOLE MOUNT |
| 封裝： | PLASTIC, TO-92, 3 PIN |
| 文件頁數(shù)： | 6/13頁 |
| 文件大?。?/td> | 300K |
| 代理商： | LM35CZ |
Typical Performance Characteristics
(Continued)
Applications
The LM35 can be applied easily in the same way as other
integrated-circuit temperature sensors. It can be glued or ce-
mented to a surface and its temperature will be within about
0.01C of the surface temperature.
This presumes that the ambient air temperature is almost the
same as the surface temperature; if the air temperature were
much higher or lower than the surface temperature, the ac-
tual temperature of the LM35 die would be at an intermediate
temperature between the surface temperature and the air
temperature. This is expecially true for the TO-92 plastic
package, where the copper leads are the principal thermal
path to carry heat into the device, so its temperature might
be closer to the air temperature than to the surface tempera-
ture.
To minimize this problem, be sure that the wiring to the
LM35, as it leaves the device, is held at the same tempera-
ture as the surface of interest. The easiest way to do this is
to cover up these wires with a bead of epoxy which will in-
sure that the leads and wires are all at the same temperature
as the surface, and that the LM35 die’s temperature will not
be affected by the air temperature.
Temperature Rise of LM35 Due To Self-heating (Thermal Resistance,
θ
JA
)
The TO-46 metal package can also be soldered to a metal
surface or pipe without damage. Of course, in that case the
V terminal of the circuit will be grounded to that metal. Alter-
natively, the LM35 can be mounted inside a sealed-end
metal tube, and can then be dipped into a bath or screwed
into a threaded hole in a tank. As with any IC, the LM35 and
accompanying wiring and circuits must be kept insulated and
dry, to avoid leakage and corrosion. This is especially true if
the circuit may operate at cold temperatures where conden-
sation can occur. Printed-circuit coatings and varnishes such
as Humiseal and epoxy paints or dips are often used to in-
sure that moisture cannot corrode the LM35 or its connec-
tions.
These
devices
are
sometimes
light-weight heat fin, to decrease the thermal time constant
and speed up the response in slowly-moving air. On the
other hand, a small thermal mass may be added to the sen-
sor, to give the steadiest reading despite small deviations in
the air temperature.
soldered
to
a
small
TO-46,
TO-46*,
TO-92,
TO-92**,
SO-8
SO-8**
TO-220
no heat
sink
small heat fin
no heat
sink
small heat fin
no heat
sink
small heat fin
no heat
sink
Still air
400C/W
100C/W
180C/W
140C/W
220C/W
110C/W
90C/W
Moving air
100C/W
40C/W
90C/W
70C/W
105C/W
90C/W
26C/W
Still oil
100C/W
40C/W
90C/W
70C/W
Stirred oil
50C/W
30C/W
45C/W
40C/W
(Clamped to metal,
Infinite heat sink)
(24C/W)
(55C/W)
*Wakefield type 201, or 1" disc of 0.020" sheet brass, soldered to case, or similar.
**TO-92 and SO-8 packages glued and leads soldered to 1" square of 1/16" printed circuit board with 2 oz. foil or similar.
Noise Voltage
DS005516-34
Start-Up Response
DS005516-35
www.national.com
6
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM35CZ | 制造商:Texas Instruments 功能描述:IC PRECISION TEMP SENSOR TO-92-3 |
| LM35CZ/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Temperature Transducer/Sensor |
| LM35CZ/HALF | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:IC PRECISION TEMP SENSOR TO-92-3 |
| LM35CZ/LFT1 | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM35CZ/LFT4 | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
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