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TL1431 Datasheet(PDF) 5 Page - STMicroelectronics

No. de Pieza. TL1431
Descripción  Programmable Voltage Reference
Descarga  13 Pages
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Fabricante  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
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TL1431 Datasheet(HTML) 5 Page - STMicroelectronics

 
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TL1431
Electrical Characteristics
5/13
Table 4.
Tamb = 25°C (unless otherwise specified)
Symbol
Parameter
TL1431I
TL1431AI
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
Vref
Reference Input Voltage - figure 1
VKA = Vref , Ik = 10 mA
2.490 2.500 2.510 2.493 2.500 2.507
V
∆V
ref
Reference Input Voltage Deviation Over
Temperature Range (1) - figure 1
VKA = Vref, Ik = 10 mA, Tmin ≤Tamb ≤ Tmax
1.
V
ref is defined as the difference between the maximum and minimum values obtained over the full temperature range.
∆V
ref = Vref max. - Vref min.
730
7
30
mV
Temperature Coefficient of Reference Input
Voltage (2)
VKA = Vref, Ik = 10 mA, Tmin ≤Tamb ≤ Tmax
2.
The temperature coefficient is defined as the slopes (positive and negative) of the voltage vs temperature limits within
which the reference is guaranteed.
±22
±100
±22
±100
ppm/°C
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
-1.1
2
mV/V
Iref
Reference Input Current
Ik = 10mA, R1 = 10k
Ω, R2 = ∞
Tmin ≤Tamb ≤Tmax
1.5
2.5
3
1.5
2.5
3
µA
∆I
ref
Reference Input Current Deviation Over
Temperature Range
Ik = 10mA, R1 = 10k
Ω, R2 =∞
Tmin ≤Tamb ≤ Tmax
0.5
1
0.8
1.2
µA
Imin
Minimum Cathode Current for Regulation - figure 1
VKA = Vref
0.5
1
0.5
0.7
mA
Ioff
Off-State Cathode Current - figure 3
180
500
180
500
nA
⏐ZKA⏐
Dynamic Impedance (3)
VKA = Vref , ∆ Ik = 1 to100mA, f ≤1kHZ
3.
The dynamic Impedance is definied as
|ZKA| =
0.2
0.5
0.2
0.5
T1
T2
Temperature
V ref max.
V ref min.
∆Vref
∆T
----------------
Temperature
25°C
Max
2.5V
min
-n
ppm/°C
+n
ppm
/°C
∆Vref
∆Vka
----------------
∆VKA
∆IK
-----------------


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