SNVS041F – MAY 2004 – REVISED MAY 2005
LMV431BI ELECTRICAL CHARACTERISTICS
T
A
= 25°C unless otherwise specified
Symbol
V
REF
V
DEV
ΔV
REF
/
ΔV
Z
I
REF
∝I
REF
I
Z(MIN)
I
Z(OFF)
r
Z
Parameter
Reference Voltage
Deviation of Reference Input Voltage Over
Temperature
(1)
Ratio of the Change in Reference Voltage
to the Change in Cathode Voltage
Reference Input Current
Deviation of Reference Input Current over
Temperature
Minimum Cathode Current for Regulation
Off-State Current
Dynamic Output Impedance
(2)
Conditions
V
Z
= V
REF
, I
Z
= 10mA
(See
)
T
A
= 25°C
T
A
= Full Range
Min
1.234
1.224
Typ
1.24
6
−1.5
Max
1.246
1.259
20
−2.7
Unit
s
V
mV
mV/
V
μA
μA
µA
μA
Ω
V
Z
= V
REF
, I
Z
= 10mA,
T
A
= Full Range
(See
I
Z
= 10mA
(see
)
V
Z
from V
REF
to 6V
R
1
= 10k, R
2
=
∞
and 2.6k
R
1
= 10kΩ, R
2
=
∞
I
I
= 10mA
(see
R
1
= 10kΩ, R
2
=
∞,
I
I
= 10mA, T
A
= Full Range
(see
V
Z
= V
REF
(see
V
Z
= 6V, V
REF
= 0V
(see
)
V
Z
= V
REF
, I
Z
= 0.1mA to 15mA
Frequency = 0Hz
(see
0.15
0.1
55
0.001
0.25
0.50
0.4
80
0.1
0.4
(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:
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
), the dynamic output impedance of the overall circuit, r
Z
, is defined as:
Copyright © 2004–2005, Texas Instruments Incorporated
9
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