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LM334Z Datasheet(PDF) 7 Page - STMicroelectronics

Part No. LM334Z
Description  THREE TERMINAL ADJUSTABLE CURRENT SOURCES
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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V
ADJ
VO
V
R3
R2
R1
V > 4.8V
i
C1
R1 = 230
Ω,1%
VO =10mV/
oK
R2 = 10k
Ω,1%
ZO
≤ 100Ω
R3 = 600
Output i mpedance of the LM134, LM234, LM334 at the
”A DJ” pin is approximately
− Ro
16
where Ro is the equiva-
lent external resi stance connected to the V
-
pi n. T his
negative resi stance can be reduced by a factor of 5 or
more by i nserting an equi val ent resistor in seri es with
the output
Figure 5 : Low Output Impedance Thermometer
C1
R1
R2
Vi
V
ADJ
VO
V
R3
R4
R1 = 15k
R2 = 300
R3 = 100
R4 = 4.5k
C1 = 2.2nF
VO = 10mV/
OK
ZO
≤ 2Ω
FIgure 6 : Low Output Impedance Thermometer
ADJ
Vi
V
set
R
V
Vi
1
µA
UA776
Rset = 68k
Figure 7 : Micropower Bias
ADJ
Vi
V
V
C1
R2
VO
LM136
R1
2N2905
R1 = 1.5k
R2 = 120
C1 = 0.1
µF
IO
≤ 3mA
V I
+
≥ Vref +200mV
V O =VZ +64mV (+25
oC)
Figure 8 : Low Input Voltage Reference Driver
LM134-LM234-LM334
7/10




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