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431AC Datasheet(PDF) 4 Page - STMicroelectronics

Part # 431AC
Description  Programmable Voltage Reference
Download  13 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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Electrical Characteristics
TL431
4/13
3
Electrical Characteristics
Table 3.
Tamb = 25°C (unless otherwise specified)
Symbol
Parameter
TL431C
TL431AC
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
Vref
Reference Input Voltage
VKA = Vref , Ik = 10 mA, Tamb = 25°C
Tmin ≤Tamb ≤ Tmax
2.44
2.423
2.495
2.55
2.567
2.47
2.453
2.495
2.52
2.537
V
∆V
ref
Reference Input Voltage Deviation Over Temperature
Range (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.
317
3
15
mV
Ratio of Change in Reference Input Voltage to Change
in Cathode to Anode Voltage
Ik = 10mA -
∆V
KA = 10V to Vref
∆V
KA = 36V to 10V
-1.4
-1
-2.7
-2
-1.4
-1
-2.7
-2
mV/V
Iref
Reference Input Current
Ik = 10mA, R1 = 10k
Ω, R2 = ∞
Tamb = 25°C
Tmin ≤Tamb ≤Tmax
1.8
4
5.2
1.8
4
5.2
µA
∆I
ref
Reference Input Current Deviation Over Temperature
Range
Ik = 10mA, R1 = 10k
Ω, R2 =∞
Tmin ≤Tamb ≤ Tmax
0.4
1.2
0.4
1.2
µA
Imin
Minimum Cathode Current for Regulation
VKA = Vref
0.5
1
0.5
0.6
mA
Ioff
Off-State Cathode Current
2.6
1000
2.6
1000
nA
⏐ZKA⏐
Dynamic Impedance (2)
VKA = Vref , ∆ Ik = 1 to100mA, f ≤1kHZ
2.
The dynamic Impedance is definied as
|ZKA| =
0.22
0.5
0.22
0.5
T1
T2
Temperature
V ref max.
V ref min.
∆Vref
∆Vka
------------
∆VKA
∆IK
-----------------


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