LM234 pdf,LM234中文资料,LM234应用电路

三端可调电流源

制造商：

产品信息

The LM134/LM234/LM334 are 3-terminal adjustable current sources characterized by:an operating current range of 10000: 1an excellent current regulationa wide dynamic voltage range of 1V t 10V

The current is determined by an external resistor without requiring other external components.

Reverse voltages of up to 20V will only draw a current of several microamperes. This enables the circuit to operate as a rectifier and as a source of current in a.c. applications.

For the LM134/LM234/LM334, the voltage on the control pin is 64mV at +25°C and is directly proportional to the absolute temperature (°K). The simplest external resistor connection generates a current with approximately 0.33%/°C temperature dependence. Zero drift can be obtained by adding an additional resistor and a diode to the external circuit.

lm134 / lm234 / lm334是三端可调电流源的特点是：工作电流范围10000：1良好的电流调整宽动态电压范围为1V T 10V

电流由一个外部电阻器确定，而不需要其他外部元件。

反向电压20V只会画几个微安的电流。这使得电路作为一个整流器和交流应用的电流源。

为lm134 / lm234 / lm334，控制引脚上的电压在±25°C 64mV是绝对温度成正比（°K）。最简单的外部电阻连接产生的电流约为0.33% /°C的温度依赖性。可以通过增加一个额外的电阻和二极管的外部电路的零漂移。

Key Features

Operates from 1V to 40V

0.02%/V current regulation

Programmable from 1µA to 10mA

±3% initial accuracy

主要特点

工作在1V至40V

0.02% /五电流调节

可编程从1µ为10mA

3%初始精度

电路图、引脚图和封装图

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LM234电路图

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LM234引脚图

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LM234封装图

应用案例