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參數資料
| 型號： | T1431 |
| 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： | 5/24頁 |
| 文件大?。?/td> | 345K |
| 代理商： | T1431 |
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
(
(
=
(4)
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 +
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
TL1431Q
TYP
2500
TL1431M
TYP
2500
TEST
CIRCUIT
PARAMETER
TEST CONDITIONS
T
A(1)
UNIT
MIN
2490
MAX
2510
MIN
2475
MAX
2540
25
°
C
Full
range
V
I(ref)
Reference input voltage
V
KA
= V
I(ref)
Figure 1
mV
2470
2530
2460
2550
Deviation of reference
input voltage over full
temperature range
(2)
Ratio of change in
reference input voltage
to the change in
cathode voltage
Full
range
V
I(dev)
V
KA
= V
I(ref)
Figure 1
17
55
17
55
(3)
mV
Full
range
V
KA
= 3 V to 36 V
Figure 2
–1.1
–2
–1.1
–2
mV/V
25
°
C
Full
range
1.5
2.5
1.5
2.5
I
I(ref)
Reference input current
R1 = 10 k
, R2 =
∞
Figure 2
μ
A
4
5
Deviation of reference
input current over full
temperature range
(2)
Minimum cathode
current for regulation
Full
range
I
I(dev)
R1 = 10 k
, R2 =
∞
Figure 2
0.5
2
0.5
3
(3)
μ
A
I
min
V
KA
= V
I(ref)
25
°
C
Figure 1
0.45
1
0.45
1
mA
25
°
C
Full
range
0.18
0.5
0.18
0.5
Off-state cathode
current
I
off
V
KA
= 36 V, V
I(ref)
= 0
Figure 3
μ
A
2
2
V
KA
= V
, f
≤
1 kHz,
I
KA
= 1 mA to 100 mA
|z
KA
|
Output impedance
(4)
25
°
C
Figure 1
0.2
0.4
0.2
0.4
(1)
(2)
Full range is –40
°
C to 125
°
C for Q-suffix devices and –55
°
C to 125
°
C for M-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
is positive or negative, depending on whether minimum V
or maximum V
I(ref)
, respectively, occurs at the lower temperature.
On products compliant to MIL-PRF-38535, this parameter is not production tested.
(3)
5
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