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參數(shù)資料
| 型號： | T1431QPW |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | PRECISION PROGRAMMABLE REFERENCE |
| 中文描述： | 精密可編程的參考 |
| 文件頁數(shù)： | 4/24頁 |
| 文件大小： | 345K |
| 代理商： | T1431QPW |
www.ti.com
where:
T
A
is the rated operating temperature range of the device.
MaxV
I(ref)
MinV
I(ref)
˙
T
A
V
I(dev)
α
VI(ref)
ppm
°
C
VI(dev)
VI(ref)at 25
°
C
× 10
6
T
A
(
(
=
(3)
The output impedance is defined as:
I
KA
V
KA
|z | =
When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by:
R1
|z |
(
.
I
V
|z'| =
,
which is approximately equal to
R2
(
1 +
Recommended Operating Conditions
Electrical Characteristics
at specified free-air temperature, I
KA
= 10 mA (unless otherwise noted)
V
KA
V
I(ref)
TL1431
PRECISION PROGRAMMABLE REFERENCE
SLVS062K–DECEMBER 1991–REVISED OCTOBER 2006
MIN
V
I(ref)
MAX
UNIT
V
mA
V
KA
I
KA
Cathode voltage
Cathode current
36
1
0
100
70
125
125
TL1431C
TL1431Q
TL1431M
T
A
Operating free-air temperature
–40
–55
°
C
TL1431C
TEST
CIRCUIT
PARAMETER
TEST CONDITIONS
T
A(1)
UNIT
MIN
2490
2480
TYP
2500
MAX
2510
2520
25
°
C
V
I(ref)
Reference input voltage
V
KA
= V
I(ref)
Figure 1
mV
Full range
Deviation of reference input
voltage over full temperature
range
(2)
Ratio of change in reference
input voltage to the change in
V
KA
= 3 V to 36 V
cathode voltage
V
I(dev)
V
KA
= V
I(ref)
Full range
Figure 1
4
20
mV
Full range
Figure 2
–1.1
–2
mV/V
25
°
C
1.5
2.5
I
I(ref)
Reference input current
R1 = 10 k
, R2 =
∞
Figure 2
μ
A
Full range
3
Deviation of reference input
current over full temperature
range
(2)
Minimum cathode current for
regulation
I
I(dev)
R1 = 10 k
, R2 =
∞
Full range
Figure 2
0.2
1.2
μ
A
I
min
V
KA
= V
I(ref)
25
°
C
Figure 1
0.45
1
mA
25
°
C
0.18
0.5
I
off
Off-state cathode current
V
KA
= 36 V, V
I(ref)
= 0
Figure 3
μ
A
Full range
2
V
KA
= V
, f
≤
1 kHz,
I
KA
= 1 mA to 100 mA
|z
KA
|
Output impedance
(3)
25
°
C
Figure 1
0.2
0.4
(1)
(2)
Full range is 0
°
C to 70
°
C for C-suffix devices.
The deviation parameters V
and I
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
α
VI(ref)
is defined as:
α
VI(ref)
is positive or negative, depending on whether minimum V
I(ref)
or maximum V
I(ref)
, respectively, occurs at the lower temperature.
4
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