TL1431_05 Datasheet, PDF (4/13 Pages) STMicroelectronics – Programmable Voltage Reference

Electrical Characteristics
3 Electrical Characteristics
TL1431
Table 3.
Symbol
T_amb = 25°C (unless otherwise specified)
Parameter
TL1431C
TL1431AC
Unit
Min. Typ. Max. Min. Typ. Max.
V_ref
∆V_ref
Reference Input Voltage - figure 1
V_KA = V_ref , Ik = 10 mA
Reference Input Voltage Deviation Over
Temperature Range ⁽¹⁾ - figure 1
V_KA = Vref, Ik = 10 mA, T_min ≤T_amb ≤ T_max
V
2.490 2.500 2.510 2.493 2.500 2.507
3 20
mV
3 20
∆_----V_-----r_--e_----f
∆T
Temperature Coefficient of Reference Input
Voltage ⁽²⁾
V_KA = Vref, Ik = 10 mA, T_min ≤T_amb ≤ T_max
±13 ±90
ppm/°C
±13 ±90
∆_-∆---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
-2 -1.1
-2 -1.1
mV/V
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
0.2 1.2
µA
0.2 1.2
Minimum Cathode Current for Regulation - figure 1
I_min
V_KA = V_ref
0.5 1
mA
0.5 0.6
I_off Off-State Cathode Current - figure 3
180 500
180 500 nA
Dynamic Impedance ⁽³⁾
⏐ZKA⏐
V_KA = V_ref , ∆ Ik = 1 to100mA, f ≤1kHZ
0.2 0.5
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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