Datasheet > LM3911N

LM3911N

更新时间： 2024-11-17 22:51:51

品牌	Logo	应用领域
美国国家半导体 - NSC		控制器
页数	文件大小	规格书
8页	213K
描述
LM3911 Temperature Controller

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中文翻译

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技术参数
数据手册

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LM3911N 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	DIP8,.3	Reach Compliance Code：	unknown
风险等级：	5.69	最大精度（摄氏度）：	10 Cel
主体宽度：	6.35 mm	主体高度：	4.38 mm
主体长度或直径：	9.81 mm	外壳：	PLASTIC
JESD-609代码：	e0	安装特点：	SURFACE MOUNT
端子数量：	8	最高工作温度：	85 °C
最低工作温度：	-25 °C	最大输出电压：	3.08 V
最小输出电压：	2.88 V	封装主体材料：	PLASTIC/EPOXY
封装等效代码：	DIP8,.3	封装形状/形式：	RECTANGULAR
传感器/换能器类型：	TEMPERATURE SENSOR,ANALOG,VOLTAGE OUTPUT	子类别：	Other Sensors
最大供电电压：	7.25 V	最小供电电压：	6.55 V
表面贴装：	YES	技术：	BIPOLAR
端子面层：	Tin/Lead (Sn/Pb)	端接类型：	SOLDER
Base Number Matches：	1

LM3911N 数据手册

June 1994

LM3911 Temperature Controller

General Description

The LM3911 is a highly accurate temperature measurement

perature range. Fabricated on a single monolithic chip, it

includes a temperature sensor, a stable voltage reference

and an operational amplifier.

The LM3911 uses the difference in emitter-base voltage of

transistors operating at different current densities as the ba-

sic temperature sensitive element. Since this output de-

pends only on transistor matching the same reliability and

stability as present op amps can be expected.

and/or control system for use over a 25 C to 85 C tem-

The output voltage of the LM3911 is directly proportional to

temperature in degrees Kelvin at 10 mV/ K. Using the inter-

The LM3911 is available in two package styles, a metal can

TO-46 and an 8-lead epoxy mini-DIP. In the epoxy package

all electrical connections are made on one side of the de-

vice allowing the other 4 leads to be used for attaching the

LM3911 to the temperature souce. The LM3911 is rated for

nal op amp with external resistors any temperature scale

factor is easily obtained. By connecting the op amp as a

comparator, the output will switch as the temperature trans-

verses the set-point making the device useful as an on-off

temperature controller.

operation over a 25 C to 85 C temperature range.

Features

An active shunt regulator is connected across the power

leads of the LM3911 to provide a stable 6.8V voltage refer-

ence for the sensing system. This allows the use of any

power supply voltage with suitable external resistors.

Uncalibrated accuracy 10 C

Internal op amp with frequency compensation

Linear output of 10 mV/ K (10 mV/ C)

Can be calibrated in degrees Kelvin, Celsius or

Fahrenheit

The input bias current is low and relatively constant with

temperature, ensuring high accuracy when high source im-

pedance is used. Further, the output collector can be re-

turned to a voltage higher than 6.8V allowing the LM3911 to

drive lamps and relays up to a 35V supply.

Output can drive loads up to 35V

Internal stable voltage reference

Low cost

Block Diagram

Typical Applications

Ground Referred

Centigrade Thermometer

Proportioning Temperature

Controller

Basic Temperature Controller

* Output goes negative on

temperature increase

TL/H/5701–1

6.8V) kX

Note 1: C1 determines proportioning frequency f

* Trims out initial zener tolerance.

Set output to read C

2R4 C1

V^a

V^b

0.0015A

Note 2: R10

Note 3: Either V^bor V^acan be ground.

1995 National Semiconductor Corporation

TL/H/5701

RRD-B30M115/Printed in U. S. A.

12 3 4 5 6 7 8

中文翻译

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