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LM20BIM7XEP Datasheet(PDF) 7 Page - National Semiconductor (TI) |
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LM20BIM7XEP Datasheet(HTML) 7 Page - National Semiconductor (TI) |
7 / 9 page 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 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. Applications Circuits 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. This ADC 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 www.national.com 7 |
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Descripción similar - LM20BIM7XEP |
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