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TL1431_08 Datasheet, PDF (4/16 Pages) Texas Instruments – PRECISION PROGRAMMABLE REFERENCE
Electrical characteristics
3
Electrical characteristics
TL1431
Table 3.
Symbol
Tamb = 25°C (unless otherwise specified)
Parameter
TL1431C
TL1431AC
Unit
Min. Typ. Max. Min. Typ. Max.
Vref
ΔVref
Δ-----V----r--e----f
ΔT
Reference input voltage - see Figure 4
VKA = Vref , Ik = 10 mA
Reference input voltage deviation over
temperature range (1) - see Figure 4
VKA = Vref, Ik = 10 mA, Tmin ≤ Tamb ≤ Tmax
Temperature coefficient of reference input
voltage(2)
VKA = Vref, Ik = 10 mA, Tmin ≤Tamb ≤ Tmax
2.490 2.500 2.510 2.493 2.500 2.507 V
3 20
3 20 mV
±13 ±90
±13 ±90 ppm/°C
Δ-Δ---V-V----rk--e--a--f
Iref
Ratio of change in reference input voltage to
change in cathode to anode voltage - see
Figure 5
Ik = 10mA - ΔVKA = 36V to 3V
Reference input current
Ik = 10mA, R1 = 10kΩ, R2 = ∞
Tmin ≤ Tamb ≤ Tmax
-2 -1.1
-2 -1.1
mV/V
1.5 2.5
3
1.5 2.5 µA
3
Reference input current deviation over
ΔIref temperature range
Ik = 10mA, R1 = 10kΩ, R2 =∞, Tmin ≤ Tamb ≤ Tmax
0.2 1.2
0.2 1.2 µA
Imin
Ioff
⏐ ZKA⏐
Minimum cathode current for regulation - Figure 4
VKA = Vref
Off-state cathode current - see Figure 6
Dynamic impedance (3)
VKA = Vref , ΔIk = 1 to100mA, f ≤ 1kHz
0.5 1
180 500
0.2 0.5
0.5 0.6 mA
180 500 nA
0.2 0.5
Ω
1. See Reference input voltage deviation over temperature range in Section 4: Parameter definitions on page 9.
2. See Temperature coefficient of reference input voltage in Section 4: Parameter definitions on page 9.
3. See Dynamic impedance in Section 4: Parameter definitions on page 9.
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