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LM334D Datasheet(PDF) 1 Page - STMicroelectronics

Part No. LM334D
Description  THREE TERMINAL ADJUSTABLE CURRENT SOURCES
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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Z
TO92
(Plastic Package)
.
OPERATES from 1V to 40V
.
0.02% V CURRENT REGULATION
.
PROGRAMMABLE from 1
µA to 10mA
.±
3% INITIAL ACCURACY
DESCRIPTION
The LM134/LM234/LM334 are 3-terminal adjust-
able current sources characterized by :
- an operating current range of 10000 : 1
- an excellent current regulation
- a wide dynamic voltage range of 1V to 40V
The current is determined by an external resistor
without requiring other external components.
Reverse voltages of up to 20V will only draw a cur-
rent of several microamperes. This enables the
circuit to operate as a rectifier and as a source of cur-
rent in a.c. applications.
For the LM134/LM234/LM334, the voltage on the
control pin is 64mV at +25
oC and is directly propor-
tional to the absolute temperature (
oK). The simplest
external resistor connection generates a current
with
≈ 0.33%/oC temperature dependence. Zero
drift can be obtainedby adding an additionalresistor
and a diode to the external circuit.
PIN CONNECTIONS
D
SO8
(Plastic Micropackage)
V +
AD J
V
-
21
3
TO92
(Bottom view)
LM134-LM234
LM334
THREE TERMINAL ADJUSTABLE CURRENT SOURCES
87
6
5
12
3
4
NC
NC
V
NC
-
ADJ
NC
N C
V+
SO8
(Top view)
ORDER CODES
Part Num-
ber
Temperature
Range
Package
ZD
LM134
–55
oC, +125oC
••
LM234
–25
oC, +100oC
••
LM334
0
oC, +70oC
••
Example : LM134Z
October 1997
1/10




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