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TL1431QD Datenblatt(PDF) 5 Page - Texas Instruments

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Teilenummer TL1431QD
Bauteilbeschribung  PRECISION PROGRAMMABLE REFERENCE
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TL1431
PRECISION PROGRAMMABLE REFERENCE
SLVS062F – DECEMBER 1991 – REVISED JANUARY 2000
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics at specified free-air temperature, IKA = 10 mA (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TA†
TEST
TL1431C
UNIT
PARAMETER
TEST CONDITIONS
TA†
CIRCUIT
MIN
TYP
MAX
UNIT
Reference
25
°C
2490
2500
2510
VI(ref)
Reference
input voltage
VKA = VI(ref)
Full
range
Figure 1
2480
2520
mV
VI(dev)
Deviation of reference input
voltage over full temperature
range‡
VKA = VI(ref)
Full
range
Figure 1
4
20
mV
DV
I(ref)
DV
KA
Ratio of change in reference
input voltage to the change in
cathode voltage
∆VKA = 3 V to 36 V
Full
range
Figure 2
–1.1
–2
mV/V
Reference
25
°C
1.5
2.5
II(ref)
Reference
input current
R1 = 10 k
Ω,
R2 =
Full
range
Figure 2
3
µA
II(dev)
Deviation of reference input
current over full temperature
range‡
R1 = 10 k
Ω,
R2 =
Full
range
Figure 2
0.2
1.2
µA
Minimum cathode current for
regulation
VKA = VI(ref) to 36 V
25
°C
Figure 1
0.45
1
mA
Off state
25
°C
0.18
0.5
Ioff
Off-state
cathode current
VKA = 36 V,
VI(ref) = 0
Full
range
Figure 3
2
µA
|zKA|
Output impedance§
VKA = VI(ref), f ≤ 1 kHz,
IKA = 1 mA to 100 mA
25
°C
Figure 1
0.2
0.4
† Full range is 0
°C to 70°C for C-suffix devices.
‡ The deviation parameters VI(dev) and II(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
a
V
I(ref)
is defined as:
where:
∆TA is the rated operating temperature range of the device.
Max VI(ref)
Min VI(ref)
∆TA
VI(dev)
a
V
I(ref)
ppm
°C +
V
I(dev)
V
I(ref)
at 25
°C
106
DT
A
a
V
I(ref)
is positive or negative depending on whether minimum VI(ref) or maximum VI(ref), respectively, occurs at the lower temperature.
§ The output impedance is defined as: z
KA +
DV
KA
DI
KA
When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by: |z
′| + DV
DI
,
which is approximately equal to z
KA
1
) R1
R2
.


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