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TL431ACPSRE4 Fiches technique(PDF) 11 Page - Texas Instruments

No de pièce TL431ACPSRE4
Description  PRECISION PROGRAMMABLE REFERENCE
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
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TL431ACPSRE4 Fiches technique(HTML) 11 Page - Texas Instruments

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R2
R1
|z |
KA
(1 +
(
∆I
∆V
|z'| =
∆I
KA
∆V
KA
|z | =
KA
(2)
The dynamic impedance is defined as:
When the device is operating with two external resistors (see Figure 5), the total dynamic impedance of the circuit is given by:
which is approximately equal to
.
TL431, TL431A, TL431B
TL432, TL432A, TL432B
www.ti.com
SLVS543M – AUGUST 2004 – REVISED JULY 2012
ELECTRICAL CHARACTERISTICS
over recommended operating conditions, TA = 25°C (unless otherwise noted)
TL431C, TL432C
PARAMETER
TEST CIRCUIT
TEST CONDITIONS
UNIT
MIN
TYP
MAX
Vref
Reference voltage
Figure 4
VKA = Vref, IKA = 10 mA
2440
2495
2550
mV
SOT23-3 and TL432
Deviation of reference input
6
16
VKA = Vref,
devices
VI(dev)
voltage over full temperature
Figure 4
mV
IKA = 10 mA,
range(1)
All other devices
4
25
Ratio of change in reference
ΔVKA = 10 V − Vref
-1.4
-2.7
ΔVref /
voltage to the change in
Figure 5
IKA = 10 mA
mV/V
ΔVKA
ΔVKA = 36 V − 10 V
-1
-2
cathode voltage
Iref
Reference input current
Figure 5
IKA = 10 mA, R1 = 10 kΩ, R2 = ∞
2
4
µA
Deviation of reference input
II(dev)
current over full temperature
Figure 5
IKA = 10 mA, R1 = 10 kΩ, R2 = ∞
0.4
1.2
µA
range(1)
Minimum cathode current for
Imin
Figure 4
VKA = Vref
0.4
1
mA
regulation
Ioff
Off-state cathode current
Figure 6
VKA = 36 V, Vref = 0
0.1
1
µA
|zKA|
Dynamic impedance(2)
Figure 4
VKA = Vref, f ≤ 1 kHz, IKA = 1 mA to 100 mA
0.2
0.5
(1)
The deviation parameters Vref(dev) and Iref(dev) are defined as the differences between the maximum and minimum values obtained over
the rated temperature range. The average full-range temperature coefficient of the reference input voltage
αVref is defined as:
αVref is positive or negative, depending on whether minimum Vref or maximum Vref, respectively, occurs at the lower temperature.
Copyright © 2004–2012, Texas Instruments Incorporated
Submit Documentation Feedback
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Product Folder Link(s): TL431 TL431A TL431B TL432 TL432A TL432B


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