參數(shù)資料
型號： TL431MJG883B
廠商： TEXAS INSTRUMENTS INC
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 2.495 V, CDIP8
封裝： CERAMIC, DIP-8
文件頁數(shù)： 4/67頁
文件大?。?/td> 1350K
代理商： TL431MJG883B
TL431, TL431A, TL431B
TL432, TL432A, TL432B
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS543J AUGUST 2004 REVISED DECEMBER 2005
12
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating conditions, TA = 25°C (unless otherwise
noted)
PARAMETER
TEST
CIRCUIT
TEST CONDITIONS
TL431C
TL432C
UNIT
PARAMETER
CIRCUIT
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Vref
Reference voltage
2
VKA = Vref,
IKA = 10 mA
2440
2495
2550
mV
VI(dev)
Deviation of reference voltage
over full temperature range
2
VKA = Vref,
IKA = 10 mA,
SOT23-3 and TL432
devices
6
16
mV
VI(dev)
over full temperature range
(see Figure 1)
2
IKA = 10 mA,
TA = 0°C to 70°C
All other devices
4
25
mV
DV
ref
Ratio of change in reference voltage
3
IKA = 10 mA
VKA = 10 V Vref
1.4
2.7
mV
DV
ref
DV
KA
Ratio of change in reference voltage
to the change in cathode voltage
3
IKA = 10 mA
VKA = 36 V 10 V
1
2
mV
V
Iref
Reference current
3
IKA = 10 mA, R1 = 10 k, R2 = ∞
2
4
A
II(dev)
Deviation of reference current
over full temperature range
(see Figure 1)
3
IKA = 10 mA, R1 = 10 k, R2 = ∞,
TA = 0°C to 70°C
0.4
1.2
A
Imin
Minimum cathode current
for regulation
2
VKA = Vref
0.4
1
mA
Ioff
Off-state cathode current
4
VKA = 36 V,
Vref = 0
0.1
1
A
|zKA|
Dynamic impedance (see Figure 1)
1
IKA = 1 mA to 100 mA, VKA = Vref,
f
≤ 1 kHz
0.2
0.5
The deviation parameters Vref(dev) and Iref(dev) are defined as the differences between the maximum and minimum
values obtained over the recommended temperature range. The average full-range temperature coefficient of the
reference voltage,
αVref, is defined as:
where:
TA is the recommended operating free-air temperature range of the device.
can be positive or negative, depending on whether minimum Vref or maximum Vref, respectively, occurs at the
lower temperature.
Example: maximum Vref = 2496 mV at 30°C, minimum Vref = 2492 mV at 0°C, Vref = 2495 mV at 25°C,
TA = 70°C for TL431C
Because minimum Vref occurs at the lower temperature, the coefficient is positive.
Calculating Dynamic Impedance
The dynamic impedance is defined as:
When the device is operating with two external resistors (see Figure 3), the total dynamic impedance of the circuit
is given by:
Maximum Vref
Minimum Vref
TA
VI(dev)
a
V
ref
ppm
°C +
V
I(dev)
V
ref
at 25
°C
106
DT
A
a
V
ref
+
4mV
2495 mV
106
70
°C
[
23 ppm
°C
|z
KA|
+
DV
KA
DI
KA
|z |
+ DV
DI [
|z
KA|
1
) R1
R2
aV
ref
Figure 1. Calculating Deviation Parameters and Dynamic Impedance
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