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LM334 Datasheet(PDF) 1 Page - STMicroelectronics

Part No. LM334
Description  THREE TERMINAL ADJUSTABLE CURRENT SOURCES
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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s OPERATES FROM 1V TO 40V
s 0.02%/V CURRENT REGULATION
s PROGRAMMABLE FROM 1µA TO 10mA
s ±3% INITIAL ACCURACY
DESCRIPTION
The LM134/LM234/LM334 are 3-terminal adjust-
able current sources characterized by:
u an operating current range of 10000: 1
u an excellent current regulation
u a wide dynamic voltage range of 1V t 10V
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
current in a.c. applications.
For the LM134/LM234/LM334, the voltage on the
control pin is 64mV at +25°C and is directly pro-
portional to the absolute temperature (°K). The
simplest external resistor connection generates a
current with
≈ 0.33%/°C temperature dependence.
Zero drift can be obtained by adding an additional
resistor and a diode to the external circuit.
ORDER CODE
Z = TO92 Plastic package - also available in Bulk (Z), Tape & Reel (ZT)
and Ammo Pack (AP)
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONNECTIONS (top view)
Part Number
Temperature
Range
Package
ZD
LM134
-55°C, +125°C
••
LM234
-25°C, +100°C
••
LM334
0°C, +70°C
••
Z
TO92
(Plastic Package)
D
SO8
(Plastic Micropackage)
ADJ
v+
v-
21
3
8765
1234
NC
NC
V-
NC
ADJ
NC
NC
V+
TO92
(Top view)
SO8
(Top view)
LM134
LM234 - LM334
THREE TERMINAL ADJUSTABLE CURRENT SOURCES
May 2003




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