Datasheet

Where:T
2
− T
1
= full temperature change.∝V
REF
can be positive or negative depending
on whether the slope is positive or negative.Example: V
DEV
= 6.0mV,
REF
= 1240mV, T
2
− T
1
= 125°C.
(2) The dynamic output impedance, r
Z
, is defined as: When the device is programmed with two external resistors, R1 and R2, (see
Figure 5 ), the dynamic output impedance of the overall circuit, r
Z
, is defined as:
LMV431, LMV431A, LMV431B
SNVS041F –MAY 2004–REVISED MAY 2005 www.ti.com
LMV431AC ELECTRICAL CHARACTERISTICS
T
A
= 25°C unless otherwise specified
Symbol Parameter Conditions Min Typ Max Unit
s
V
REF
Reference Voltage V
Z
= V
REF
, I
Z
= 10 mA T
A
= 25°C 1.228 1.24 1.252
V
(See Figure 4 )
T
A
= Full Range 1.221 1.259
V
DEV
Deviation of Reference Input Voltage Over V
Z
= V
REF
, I
Z
= 10mA, 4 12 mV
Temperature
(1)
T
A
= Full Range (See Figure 4)
ΔV
REF
/ Ratio of the Change in Reference Voltage I
Z
= 10 mA (see Figure 5 ) −1.5 −2.7 mV/
ΔV
Z
to the Change in Cathode Voltage V
Z
from V
REF
to 6V V
R
1
= 10k, R
2
= ∞ and 2.6k
I
REF
Reference Input Current R
1
= 1 kΩ, R
2
= ∞ 0.15 0.50 μA
I
I
= 10 mA (see Figure 5)
∝I
REF
Deviation of Reference Input Current over R
1
= 10 kΩ, R
2
= ∞,
0.05 0.3 μA
Temperature I
I
= 10 mA, T
A
= Full Range (see Figure 5)
I
Z(MIN)
Minimum Cathode Current for Regulation V
Z
= V
REF
(see Figure 4) 55 80 µA
I
Z(OFF)
Off-State Current V
Z
= 6V, V
REF
= 0V (see Figure 6 ) 0.001 0.1 μA
r
Z
Dynamic Output Impedance
(2)
V
Z
= V
REF
, I
Z
= 0.1mA to 15mA
Frequency = 0 Hz (see Figure 4) 0.25 0.4 Ω
(1) Deviation of reference input voltage, V
DEV
, is defined as the maximum variation of the reference input voltage over the full temperature
range.See following:
The average temperature coefficient of the reference input voltage, ∝V
REF
, is defined as:
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