Datasheet

LM134, LM234, LM334
www.ti.com SNVS746C –MAY 2004–REVISED MARCH 2005
Electrical Characteristics
(1)
Parameter Conditions LM134/LM234 LM334 Units
Min Typ Max Min Typ Max
Set Current Error, V
+
=2.5V, 10μA ≤ I
SET
≤ 1mA 3 6 %
(2)
1mA < I
SET
≤ 5mA 5 8 %
2μA ≤ I
SET
< 10μA 8 12 %
Ratio of Set Current to 100μA ≤ I
SET
≤ 1mA 14 18 23 14 18 26
Bias Current 1mA ≤ I
SET
≤ 5mA 14 14
2 μA≤I
SET
≤100 μA 18 23 18 26
Minimum Operating Voltage 2μA ≤ I
SET
≤ 100μA 0.8 0.8 V
100μA < I
SET
≤ 1mA 0.9 0.9 V
1mA < I
SET
≤ 5mA 1.0 1.0 V
Average Change in Set Current 2μA ≤ I
SET
≤ 1mA
with Input Voltage 1.5 ≤ V
+
≤ 5V 0.02 0.05 0.02 0.1 %/V
5V ≤ V
+
≤ 40V 0.01 0.03 0.01 0.05 %/V
1mA < I
SET
≤ 5mA
1.5V ≤ V ≤ 5V 0.03 0.03 %/V
5V ≤ V ≤ 40V 0.02 0.02 %/V
Temperature Dependence of 25μA ≤ I
SET
≤ 1mA 0.96T T 1.04T 0.96T T 1.04T
Set Current
(3)
Effective Shunt Capacitance 15 15 pF
(1) Unless otherwise specified, tests are performed at T
j
= 25°C with pulse testing so that junction temperature does not change during test
(2) Set current is the current flowing into the V
+
pin. For the Basic 2-Terminal Current Source circuit shown on the first page of this data
sheet. I
SET
is determined by the following formula: I
SET
= 67.7 mV/R
SET
(@ 25°C). Set current error is expressed as a percent deviation
from this amount. I
SET
increases at 0.336%/°C @ T
j
= 25°C (227 μV/°C).
(3) I
SET
is directly proportional to absolute temperature (°K). I
SET
at any temperature can be calculated from: I
SET
= I
o
(T/T
o
) where I
o
is I
SET
measured at T
o
(°K).
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