May 2007

Rev 3

1/16

16

LM134-LM234-LM334

Three terminal adjustable current sources

Features

Description

The LM134/LM234/LM334 are 3-terminal

adjustable current sources characterized by:

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.

Z

TO-92

(Plastic package)

D

SO-8

(Plastic micropackage)

ADJ

v+

v-

21

3

TO-92

(Bottom view)

8765

1234

NC

NC

V-

NC

ADJ

NC

NC

V+

SO-8

(Top view)

Pin connections

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