Datasheet > LM19_10

LM19_10

更新时间： 2024-11-26 11:33:55

品牌	Logo	应用领域
美国国家半导体 - NSC		传感器温度传感器
页数	文件大小	规格书
10页	261K
描述
2.4V, 10μA, TO-92 Temperature Sensor

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中文翻译

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LM19_10 数据手册

January 26, 2010

LM19

2.4V, 10μA, TO-92 Temperature Sensor

FAX Machines

■

General Description

Printers

The LM19 is a precision analog output CMOS integrated-cir-

HVAC

cuit temperature sensor that operates over a −55°C to +130°

C temperature range. The power supply operating range is

+2.4 V to +5.5 V. The transfer function of LM19 is predomi-

nately linear, yet has a slight predictable parabolic curvature.

The accuracy of the LM19 when specified to a parabolic

transfer function is ±2.5°C at an ambient temperature of +30°

C. The temperature error increases linearly and reaches a

maximum of ±3.8°C at the temperature range extremes. The

temperature range is affected by the power supply voltage. At

a power supply voltage of 2.7 V to 5.5 V the temperature

range extremes are +130°C and −55°C. Decreasing the pow-

er supply voltage to 2.4 V changes the negative extreme to

−30°C, while the positive remains at +130°C.

Disk Drives

Appliances

Features

Rated for full −55°C to +130°C range

■

Available in a TO-92 package

Predictable curvature error

Suitable for remote applications

UL Recognized Component

■

Key Specifications

The LM19's quiescent current is less than 10 μA. Therefore,

self-heating is less than 0.02°C in still air. Shutdown capability

for the LM19 is intrinsic because its inherent low power con-

sumption allows it to be powered directly from the output of

many logic gates or does not necessitate shutdown at all.

±2.5 °C (max)

■ꢀAccuracy at +30°C

±3.5 to ±3.8 °C (max)

■ꢀAccuracy at +130°C & −55°C

■ꢀPower Supply Voltage Range

■ꢀCurrent Drain

■ꢀNonlinearity

■ꢀOutput Impedance

+2.4V to +5.5V

10 μA (max)

±0.4 % (typ)

160 Ω (max)

Applications

Cellular Phones

■

Computers

Power Supply Modules

■ꢀLoad Regulation

ꢁꢀ 0 μA < I_L< +16 μA

Battery Management

−2.5 mV (max)

Typical Application

Output Voltage vs Temperature

20004002

V_O= (−3.88×10⁻⁶×T²) + (−1.15×10⁻²×T) + 1.8639

where:

20004024

T is temperature, and V_Ois the measured output voltage of the LM19.

FIGURE 1. Full-Range Celsius (Centigrade) Temperature Sensor (−55°C to +130°C)

Operating from a Single Li-Ion Battery Cell

200040

www.national.com

12 3 4 5 6 7...10

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