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參數資料
| 型號： | LM20EP |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | Enhanced Plastic 2.4V, 10uA, SC70, micro SMD Temperature Sensor |
| 中文描述： | 增強塑料2.4V的，為10uA，SC70封裝，微型貼片溫度傳感器 |
| 文件頁數： | 7/9頁 |
| 文件大小： | 250K |
| 代理商： | LM20EP |
LM20EP micro SMD Light
Sensitivity
Exposing the LM20EP micro SMD package to bright sunlight
may cause the output reading of the LM20EP to drop by
1.5V. In a normal office environment of fluorescent lighting
the output voltage is minimally affected (less than a millivolt
Applications Circuits
drop). In either case it is recommended that the LM20EP
micro SMD be placed inside an enclosure of some type that
minimizes its light exposure. Most chassis provide more than
ample protection. The LM20EP does not sustain permanent
damage from light exposure. Removing the light source will
cause LM20EP’s output voltage to recover to the proper
value.
20099918
FIGURE 6. Centigrade Thermostat
20099919
FIGURE 7. Conserving Power Dissipation with Shutdown
20099928
Most CMOS ADCs found in ASICs have a sampled data comparator input structure that is notorious for causing grief to analog
output devices such as the LM20EP and many op amps. The cause of this grief is the requirement of instantaneous charge of the
input sampling capacitor in the ADC. This requirement is easily accommodated by the addition of a capacitor. Since not all ADCs
have identical input stages, the charge requirements will vary necessitating a different value of compensating capacitor. ThisADC
is shown as an example only. If a digital output temperature is required please refer to devices such as the LM74.
FIGURE 8. Suggested Connection to a Sampling Analog to Digital Converter Input Stage
L
www.national.com
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