LM234(1997) View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
LM234 Datasheet PDF : 10 Pages
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LM134-LM234-LM334
Figure 5 : Low Output Impedance Thermometer FIgure 6 : Low Output Impedance Thermometer
Vi > 4.8V
V
ADJ
R3
VO
V
R1
C1
R2
R1 = 230Ω, 1%
VO = 10mV/oK
R2 = 10kΩ, 1%
ZO ≤ 100Ω
R3 = 600Ω
Output i mpedance of the LM134, LM234, LM334 at the
”A DJ”
p in
is
approximately
−
RoΩ
16
where
Ro
is
the
equiva-
lent external resi stance connected to the V- pin. T his
negative resi stance can be reduced by a factor of 5 or
more by i nserting an equi valent resistor in seri es with
the output
Figure 7 : Micropower Bias
Vi
R1
R2
V
ADJ
VO
C1
R3
V
R1 = 15kΩ
R4
R2 = 300Ω
R3 = 100Ω
R4 = 4.5kΩ
C1 = 2.2nF
VO = 10mV/OK
ZO ≤ 2Ω
Figure 8 : Low Input Voltage Reference Driver
Vi
UA776
1µA
V
ADJ R set
V
Vi
Rset = 68kΩ
Vi
R1
C1
2N2905
VO
V
ADJ
LM136
V
R2
R1 = 1.5kΩ
R2 = 120Ω
C1 = 0.1µF
IO ≤ 3mA
V
+
I
≥
V ref
+200mV
V O = VZ +64mV (+25 oC)
7/10
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