TL1431 Datasheet, PDF (2/8 Pages) STMicroelectronics – PROGRAMMABLE VOLTAGE REFERENCE

TL1431
ABSOLUTE MAXIMUM RATINGS
Symbol
VKA
I_K
Iref
T_{o per}
Tstg
Parameter
Cathode to Anode Voltage
Continuous Cathode Current Range
Reference Input Current Range
Operating Free-air Temperature Range TL1431C/AC
TL1431I/AI
Storage Temperature Range
Value
Unit
37
V
-100 to +150
mA
-0.05 to +10
mA
-20 to +70
o_C
-40 to +105
-65 to +150
o_C
OPERATING CONDITIONS
Symbol
VKA
I_K
Parameter
Cathode to Anode Voltage
Cathode Current
Value
Vref to 36
1 to 100
Unit
V
mA
ELECTRICAL CHARACTERISTICS
T_amb = 25^oC (unless otherwise specified)
Symbol
Parameter
V_ref
∆Vref
∆V_ref
∆T
∆Vref
∆VKA
Iref
∆I_ref
I_min
I_off
|ZKA|
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 = 36V 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)
IK = 10mA, R1 = 10kΩ, R2 = ∞
Tmin. ≤ Tamb ≤ Tmax.
Minimum Cathode Current for Regulation - (figure
1)
VKA = Vref
Off-State Cathode Current - (figure 3)
Dynamic Impedance - (figure 1, note 3)
VKA = Vref, ∆IK = 1 to 100mA, f ≤ 1kHz
TL1431C
TL1431AC
Unit
Min. Typ. Max. Min. Typ. Max.
V
2.490 2.500 2.510 2.493 2.500 2.507
mV
3
20
3
20
ppm/^oC
±13 ±90
±13 ±90
mV/V
-2 -1.1
-2 -1.1
µA
1.5 2.5
3
1.5 2.5
3
µA
0.2 1.2
0.2 1.2
0.5 1
mA
0.5 0.6
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
V ref ma x.
Vre fmin.
T1
T2
Tempe ra tur e
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|
=
∆V_KA
∆I_K
25 C
Te m pe ra ture
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