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| 型號： | TL1431QDRQ1 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.49 V, PDSO8 |
| 封裝： | ROHS COMPLIANT, PLASTIC, MS-012AA, SOIC-8 |
| 文件頁數(shù)： | 14/19頁 |
| 文件大?。?/td> | 254K |
| 代理商： | TL1431QDRQ1 |
TL1431Q1
PRECISION PROGRAMMABLE REFERENCE
SLVS534B JUNE 2004 REVISED APRIL 2008
4
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
CIRCUIT
MIN
TYP
MAX
UNIT
VI(ref)
Reference input voltage
VKA = VI(ref)
25
°C
Figure 1
2490
2500
2510
mV
VI(ref)
Reference input voltage
VKA = VI(ref)
Full range
Figure 1
2470
2530
mV
VI(dev)
Deviation of reference input
voltage over full temperature
range
VKA = VI(ref)
Full range
Figure 1
17
55
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
II(ref)
Reference input current
R1 = 10 k
,
R2 =
25
°C
Figure 2
1.5
2.5
A
II(ref)
Reference input current
R1 = 10 k
,
R2 =
∞
Full range
Figure 2
4
A
II(dev)
Deviation of reference input
current over full temperature
range
R1 = 10 k
,
R2 =
∞
Full range
Figure 2
0.5
2
A
Imin
Minimum cathode current for
regulation
VKA = VI(ref)
25
°C
Figure 1
0.45
1
mA
Ioff
Off-state cathode current
VKA = 36 V,
VI(ref) = 0
25
°C
Figure 3
0.18
0.5
A
Ioff
Off-state cathode current
VKA = 36 V,
VI(ref) = 0
Full range
Figure 3
2
A
|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 40°C to 125°C for Q-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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