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參數(shù)資料
| 型號(hào)： | LM20 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | LM20 2.4V, 10レA, SC70, micro SMD Temperature Sensor |
| 中文描述： | LM20的為2.4V，10レ甲，SC70封裝，微型貼片溫度傳感器 |
| 文件頁(yè)數(shù)： | 4/9頁(yè) |
| 文件大小： | 218K |
| 代理商： | LM20 |
Electrical Characteristics
(Continued)
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is func-
tional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed speci-
fications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions.
Note 2:
When the input voltage (V
I
) at any pin exceeds power supplies (V
I
<
GND or V
I
>
V
+
), the current at that pin should be limited to 5 mA.
Note 3:
The human body model is a 100 pF capacitor discharged through a 1.5 k
resistor into each pin. The machine model is a 200 pF capacitor discharged di-
rectly into each pin.
Note 4:
See AN-450 “Surface Mounting Methods and Their Effect on Product Reliability” or the section titled “Surface Mount” found in any post 1986 National Semi-
conductor Linear Data Book for other methods of soldering surface mount devices.
Note 5:
The junction to ambient thermal resistance (
θ
JA
) is specified without a heat sink in still air using the printed circuit board layout shown in Figure *NO TARGET
FOR fig NS1382*
Note 6:
Typicals are at T
J
= T
A
= 25C and represent most likely parametric norm.
Note 7:
Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 8:
Accuracy is defined as the error between the measured and calculated output voltage at the specified conditions of voltage, current, and temperature (ex-
pressed inC).
Note 9:
Non-Linearity is defined as the deviation of the calculated output-voltage-versus-temperature curve from the best-fit straight line, over the temperature range
specified.
Note 10:
Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output due to heating effects can be com-
puted by multiplying the internal dissipation by the thermal resistance.
Note 11:
Negative currents are flowing into the LM20. Positive currents are flowing out of the LM20. Using this convention the LM20 can at most sink 1 μA and
source +16 μA.
Note 12:
Load regulation or output impedance specifications apply over the supply voltage range of +2.4V to +5.5V.
Note 13:
Line regulation is calculated by subtracting the output voltage at the highest supply input voltage from the output voltage at the lowest supply input voltage.
Typical Performance Characteristics
PCB Layouts Used for Thermal
Measurements
Temperature Error vs Temperature
DS100908-25
DS100908-29
a) Layout used for no heat sink measurements.
DS100908-30
b) Layout used for measurements with small heat hink.
FIGURE 1. PCB Lyouts used for thermal measurements.
L
www.national.com
4
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