LM234

更新时间： 2024-11-19 04:20:11

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
14页	756K
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3-Terminal Adjustable Current Sources

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LM234 数据手册

March 2005

LM134/LM234/LM334

3-Terminal Adjustable Current Sources

LED driver, and temperature sensing. The LM234-3 and

LM234-6 are specified as true temperature sensors with

guaranteed initial accuracy of 3˚C and 6˚C, respectively.

These devices are ideal in remote sense applications be-

cause series resistance in long wire runs does not affect

accuracy. In addition, only 2 wires are required.

General Description

The LM134/LM234/LM334 are 3-terminal adjustable current

sources featuring 10,000:1 range in operating current, excel-

lent current regulation and a wide dynamic voltage range of

1V to 40V. Current is established with one external resistor

and no other parts are required. Initial current accuracy is

3%. The LM134/LM234/LM334 are true floating current

sources with no separate power supply connections. In ad-

dition, reverse applied voltages of up to 20V will draw only a

few dozen microamperes of current, allowing the devices to

act as both a rectifier and current source in AC applications.

The LM134 is guaranteed over a temperature range of

−55˚C to +125˚C, the LM234 from −25˚C to +100˚C and the

LM334 from 0˚C to +70˚C. These devices are available in

TO-46 hermetic, TO-92 and SO-8 plastic packages.

Features

The sense voltage used to establish operating current in the

LM134 is 64mV at 25˚C and is directly proportional to abso-

lute temperature (˚K). The simplest one external resistor

connection, then, generates a current with ≈+0.33%/˚C tem-

perature dependence. Zero drift operation can be obtained

by adding one extra resistor and a diode.

n Operates from 1V to 40V

n 0.02%/V current regulation

n Programmable from 1µA to 10mA

n True 2-terminal operation

n Available as fully specified temperature sensor

Applications for the current sources include bias networks,

surge protection, low power reference, ramp generation,

3% initial accuracy

Connection Diagrams

SO-8

SO-8 Alternative Pinout

Surface Mount Package

00569725

Order Number LM334SM or LM334SMX

See NS Package Number M08A

00569724

Order Number LM334M or LM334MX

See NS Package Number M08A

TO-46

Metal Can Package

TO-92 Plastic Package

00569710

Bottom View

Order Number LM334Z, LM234Z-3 or LM234Z-6

See NS Package Number Z03A

00569712

−

Pin is electrically connected to case.

Bottom View

Order Number LM134H,

LM234H or LM334H

See NS Package

Number H03H

DS005697

www.national.com

12 3 4 5 6 7...14

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与LM234相关器件

型号	品牌	获取价格	描述	数据表
LM234AP	STMICROELECTRONICS	获取价格	Three terminal adjustable current sources
LM234D	STMICROELECTRONICS	获取价格	THREE TERMINAL ADJUSTABLE CURRENT SOURCES
LM234DT	STMICROELECTRONICS	获取价格	Three terminal adjustable current sources
LM234H	NSC	获取价格	3-Terminal Adjustable Current Sources
LM234H/NOPB	NSC	获取价格	IC SPECIALTY ANALOG CIRCUIT, MBCY3, METAL CAN, TO-46, 3 PIN, Analog IC:Other
LM234H-3	Linear	获取价格	Analog Temperature Sensor, ANALOG TEMP SENSOR-CURRENT, ROUND, THROUGH HOLE MOUNT, METAL CA
LM234H-3	NSC	获取价格	Analog Temperature Sensor, ANALOG TEMP SENSOR-CURRENT, 10uA, 6Cel, ROUND, THROUGH HOLE MOU
LM234Z	STMICROELECTRONICS	获取价格	THREE TERMINAL ADJUSTABLE CURRENT SOURCES
LM234Z-3	TI	获取价格	LM134/LM234/LM334 3-Terminal Adjustable Current Sources
LM234Z-3	Linear	获取价格	Analog Temperature Sensor, ANALOG TEMP SENSOR-CURRENT, RECTANGULAR, THROUGH HOLE MOUNT, PL

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