LM234 Current Source: Pinout, 3D Model and Datasheet

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The LM234 is a 3-terminal adjustable current source characterized by an operating current range of 10000:1, an excellent current regulation, a wide dynamic voltage range of 1V to 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 LM234, 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.

This article provides you with a basic overview of the LM234, including its pin descriptions, features and specifications, etc., to help you quickly understand what LM234 is.

• Operates from 1V to 40V

• 0.02%/V current regulation

• Programmable from 1µA to 10mA

• ±3% initial accuracy

LM234D, Three Terminal Adjustable Current Source, Manufacturer is STMicroelectronics. 

• Computers

• Controllers

• Intelligent instruments

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STMicroelectronics is a globally recognized semiconductor company. They are dedicated to developing semiconductor solutions for various microelectronics applications. STMicroelectronics enjoys unrivaled silicon and system expertise, strong manufacturing strength, IP portfolio,and solid relationships with their strategic partners. Based on these advantages, STMicroelectronics has become a pioneer in System-on-Chip (SoC) technology and its products has a positive effect in realizing today's convergence trends.