Datasheet > LM61_05

LM61_05

更新时间： 2024-11-09 04:20:07

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	675K
描述
2.7V, SOT-23 or TO-92 Temperature Sensor

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LM61_05 数据手册

August 2005

LM61

2.7V, SOT-23 or TO-92 Temperature Sensor

General Description

Applications

n Cellular Phones

n Computers

n Power Supply Modules

n Battery Management

n FAX Machines

n Printers

n HVAC

n Disk Drives

n Appliances

The LM61 is a precision integrated-circuit temperature sen-

sor that can sense a −30˚C to +100˚C temperature range

while operating from a single +2.7V supply. The LM61’s

output voltage is linearly proportional to Celsius (Centigrade)

temperature (+10 mV/˚C) and has a DC offset of +600 mV.

The offset allows reading negative temperatures without the

need for a negative supply. The nominal output voltage of the

LM61 ranges from +300 mV to +1600 mV for a −30˚C to

+100˚C temperature range. The LM61 is calibrated to pro-

vide accuracies of 2.0˚C at room temperature and 3˚C

over the full −25˚C to +85˚C temperature range.

Key Specifications

The LM61’s linear output, +600 mV offset, and factory cali-

bration simplify external circuitry required in a single supply

environment where reading negative temperatures is re-

quired. Because the LM61’s quiescent current is less than

125 µA, self-heating is limited to a very low 0.2˚C in still air.

Shutdown capability for the LM61 is intrinsic because its

inherent low power consumption allows it to be powered

directly from the output of many logic gates.

Accuracy at 25˚C

2.0 or 3.0˚C

(max)

Accuracy for −30˚C to +100˚C

Accuracy for −25˚C to +85˚C

Temperature Slope

4.0˚C (max)

3.0˚C (max)

+10 mV/˚C

Power Supply Voltage Range

+2.7V to +10V

125 µA (max)

0.8˚C (max)

800 Ω (max)

Current Drain 25˚C

Features

n Calibrated linear scale factor of +10 mV/˚C

n Rated for full −30˚ to +100˚C range

n Suitable for remote applications

n UL Recognized Component

Nonlinearity

Output Impedance

Typical Application

01289702

V_O= (+10 mV/˚C x T ˚C) + 600 mV

Temperature (T)

+100˚C

+85˚C

Typical V_O

+1600 mV

+1450 mV

+850 mV

+600 mV

+350 mV

+300 mV

+25˚C

0˚C

−25˚C

−30˚C

FIGURE 1. Full-Range Centigrade Temperature Sensor (−30˚C to +100˚C)

Operating from a Single Li-Ion Battery Cell

DS012897

www.national.com

12 3 4 5 6 7...10

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