TL1431 Datasheet, PDF (3/8 Pages) STMicroelectronics – PROGRAMMABLE VOLTAGE REFERENCE

TL1431
ELECTRICAL CHARACTERISTICS
Tamb = 25^oC (unless otherwise specified)
Symbol
Parameter
V_ref
∆V_ref
∆V_ref
∆T
∆V_ref
∆V_KA
Iref
∆I_ref
Imin
Ioff
|Z_KA|
Reference Input Voltage - (figure 1)
VKA = Vref, IK = 10mA
Tamb = 25^oC
Reference Input Voltage Deviation Over
Temperature Range - (figure 1, note1)
V_KA = V_ref, I_{K =} 10mA, T_min. ≤ T_amb ≤ T_max.
Temperature Coefficient of Reference Input
Voltage - (note 2)
V_KA = V_ref, I_K = 10mA, T_min. ≤ T_amb ≤ T_max.
Ratio of Change in Reference Input Voltage to
Change in Cathode to Anode Voltage - (figure 2)
IK = 10mA, ∆VKA = 36 to 3V
Reference Input Current - (figure 2)
I_K
=
10mA,
R₁
=
10kΩ,
T_amb
R=_22=5o∞_C
T_min. ≤ T_amb ≤ T_max.
Reference Input Current Deviation Over
Temperature Range - (figure 2)
I_K = 10mA, R₁ = 10kΩ, R₂ = ∞
T_min. ≤ T_amb ≤ T_max.
Minimum Cathode Current for Regulation
(figure 1)
V_KA = V_ref
Off-State Cathode Current - (figure 3)
Dynamic Impedance - (figure 1, note 3)
VKA = Vref, ∆IK = 1 to 100mA, f ≤ 1kHz
TL1431I
TL1431AI
Unit
Min. Typ. Max. Min. Typ. Max.
V
2.490 2.500 2.510 2.493 2.500 2.507
mV
7
30
7
30
ppm/^oC
±22 ±100
±22 ±100
mV/V
-1.1 -2
-1.1 -2
µA
1.5 2.5
3
1.5 2.5
3
µA
0.5 1
0.8 1.2
0.5 1
mA
0.5 0.7
180 500
0.2 0.5
180 500 nA
Ω
0.2 0.5
Notes : 1.
∆Vref is defined as the difference between the maximum and minimum values obtained over the full temperature
range.
∆Vref = Vref max. - Vref min
Vre fma x.
Vref min.
T1
T2
Tempera ture
2. The temperature coefficient is defined as the slopes (positive and negative) of the voltage vs temperature limits whithin
which the reference voltage is guaranteed.
max
2.5V
min
-n _{p pm/ C}
+ ^{n ppm / C}
3.
The
dynamic
Impedance
is
defined as
|ZKA|
=
∆VKA
∆IK
25 C
Te m pe ra ture
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