LM134-LM234-LM334 are 3-terminal adjustable current sources characterized by: an operating current range of 10000:1, excellent current regulation, a wide dynamic voltage range of 1V t 10V.
This document provides technical specifications for the LM134, LM234, and LM334, which are three-terminal adjustable current sources. These devices operate from 1V to 40V and are programmable from 1pA to 10mA using a single external resistor. The datasheet details their electrical characteristics, including set current error, temperature dependence, and output impedance across various operating conditions.
| Operating voltage range | 1V to 40V |
|---|---|
| Current regulation accuracy | 0.02%/V |
| Programmable current range | 1pA to 10mA |
| Initial accuracy | +3% |
| Set current error (10uA < Iset < 1mA) | 3% to 6% |
| Power dissipation | 400 mW |
| Storage temperature range | -65 to +150 °C |
| Operating temperature range (LM134) | -55 to +125 °C |
The current is determined by an external resistor without requiring other external components.
The current is directly proportional to absolute temperature (°K) with a dependence of approximately 0.33%/°C.
Yes, reverse voltages of up to 20V will only draw a current of several microamperes, enabling the circuit to operate as a rectifier.