Datasheet

LM134, LM234, LM334
SNVS746C –MAY 2004–REVISED MARCH 2005 www.ti.com
Electrical Characteristics
(1)
Parameter Conditions LM234-3 LM234-6 Units
Min Typ Max Min Typ Max
Set Current Error, V
+
=2.5V, 100μA ≤ I
SET
≤ 1mA ±1 ±2 %
(2)
T
J
= 25°
Equivalent Temperature Error ±3 ±6 °C
Ratio of Set Current to 100μA ≤ I
SET
≤ 1mA 14 18 26 14 18 26
Bias Current
Minimum Operating Voltage 100μA I
SET
≤ 1mA 0.9 0.9 V
Average Change in Set Current 100μA ≤ I
SET
≤ 1mA
with Input Voltage 1.5 ≤ V
+
≤ 5V 0.02 0.05 0.02 0.01 %/V
5V ≤ V
+
≤ 30V 0.01 0.03 0.01 0.05 %/V
Temperature Dependence of 100μA ≤ I
SET
≤ 1mA 0.98T T 1.02T 0.97T T 1.03T
Set Current
(3)
and
Equivalent Slope Error ±2 ±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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