LM134| Datasheet

LM134, LM134Z, LM234, LM234D, LM234DT, LM234Z, LM334, LM334D, LM334DT, LM334Z

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LM134-LM234-LM334
Three terminal adjustable current sources
Features

Operates from 1V to 40V 0.02%/V current regulation Programmable from 1uA to 10mA 3% initial accuracy Z TO-92 (Plastic package)

Description
The LM134/LM234/LM334 are 3-terminal adjustable current sources characterized by:

an operating current range of 10000: 1 an excellent current regulation a wide dynamic voltage range of 1V t 10V

D SO-8 (Plastic micropackage)

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.

Pin connections TO-92 (Bottom view)
v+
2 ADJ 1

SO-8 (Top view)
NC 8 NC 7 V6 NC 5

1 ADJ

2 NC

3 NC

4 V+

May 2007

Rev 3

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