TL1431_05 Datasheet, PDF (5/13 Pages) STMicroelectronics – Programmable Voltage Reference

TL1431
Electrical Characteristics
Table 4.
Symbol
T_amb = 25°C (unless otherwise specified)
Parameter
TL1431I
TL1431AI
Unit
Min. Typ. Max. Min. Typ. Max.
Reference Input Voltage - figure 1
V_ref
V_KA = V_ref , Ik = 10 mA
V
2.490 2.500 2.510 2.493 2.500 2.507
∆V_ref
Reference Input Voltage Deviation Over
Temperature Range ⁽¹⁾ - figure 1
V_KA = Vref, Ik = 10 mA, T_min ≤T_amb ≤ T_max
7 30
mV
7 30
∆_----V_-----r_--e_----f
∆T
Temperature Coefficient of Reference Input
Voltage ⁽²⁾
V_KA = Vref, Ik = 10 mA, T_min ≤T_amb ≤ T_max
±22 ±100
ppm/°C
±22 ±100
∆_-∆---V_-V----rk_--e_--a--f
Ratio of Change in Reference Input Voltage to
Change in Cathode to Anode Voltage - figure 2
Ik = 10mA - ∆V_KA = 36V to 3V
-1.1 2
mV/V
-1.1 2
Reference Input Current
I_ref Ik = 10mA, R1 = 10kΩ, R2 = ∞
T_min ≤T_amb ≤T_max
1.5 2.5
3
1.5 2.5 µA
3
Reference Input Current Deviation Over
Temperature Range
∆I_ref
Ik = 10mA, R1 = 10kΩ, R2 =∞
T_min ≤T_amb ≤ T_max
0.5 1
µA
0.8 1.2
Minimum Cathode Current for Regulation - figure 1
I_min
V_KA = V_ref
0.5 1
mA
0.5 0.7
I_off
⏐ZKA⏐
Off-State Cathode Current - figure 3
Dynamic Impedance ⁽³⁾
V_KA = V_ref , ∆ Ik = 1 to100mA, f ≤1kHZ
180 500
0.2 0.5
180 500 nA
Ω
0.2 0.5
1. ∆V_ref is defined as the difference between the maximum and minimum values obtained over the full temperature range.
∆V_ref = V_{ref max.} - V_{ref min.}
V ref max.
V ref min.
T1
T2
Temperature
2. The temperature coefficient is defined as the slopes (positive and negative) of the voltage vs temperature limits within
which the reference is guaranteed.
3. The dynamic Impedance is definied as|ZKA| =
Max
-n _{ppm/°C +n ppm/°C}
2.5V
min
Temperature
25°C
∆_-----V_----K_-----A_--
∆IK
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