TL1431CD [STMICROELECTRONICS]
PROGRAMMABLE VOLTAGE REFERENCE; 可编程电压参考
| 型号： | TL1431CD |
| 厂家： | 
ST |
| 描述： | PROGRAMMABLE VOLTAGE REFERENCE |
| 文件： | 总8页 (文件大小：81K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TL1431
PROGRAMMABLE VOLTAGE REFERENCE
.
ADJUSTABLE OUTPUT VOLTAGE :
ref to 36V
SINK CURRENT CAPABILITY : 1 to 100mA
TYPICAL OUTPUT IMPEDANCE : 0.2Ω
0.4% AND 0.25% VOLTAGE PRECISION
V
.
.
.
Z
TO92
(Plastic Package)
D
SO8
(Batwing Plastic Micropackage)
DESCRIPTION
The TL1431 is a programmable shunt voltage ref-
erence with guaranteed temperature stability over
the entire temperature range of operation.
The output voltage may be set to any value be-
tween Vref (approximately 2.5V) and 36V with two
external resistors.
The TL1431 operates with a wide current range
from 1 to 100mAwith a typical dynamicimpedance
of 0.2Ω.
ORDER CODES
Package
Part number Temperature Range
Z
D
TL1431C/AC
TL1431I/AI
-20oC, +70oC
-40oC, +105oC
•
•
•
•
PIN CONNECTIONS
TO92
(Top view)
SO8
(Top view)
8
7
6
5
Cathode Ano de Reference
1 - Cathode
2 - Anode
3 - Anode
4 - N.C.
1
2
3
5 - N.C.
6 - Anode
7 - Anode
8 - Reference
1
2
3
4
March 1998
1/8
TL1431
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Cathode to Anode Voltage
Value
37
Unit
V
VKA
IK
Continuous Cathode Current Range
Reference Input Current Range
-100 to +150
-0.05 to +10
mA
mA
oC
Iref
Toper
Operating Free-air Temperature Range
TL1431C/AC
-20 to +70
-40 to +105
TL1431I/AI
Tstg
Storage Temperature Range
-65 to +150
oC
OPERATING CONDITIONS
Symbol
Parameter
Cathode to Anode Voltage
Cathode Current
Value
Unit
V
VKA
IK
Vref to 36
1 to 100
mA
ELECTRICAL CHARACTERISTICS
Tamb = 25oC (unless otherwise specified)
TL1431C
TL1431AC
Symbol
Parameter
Unit
Min. Typ. Max. Min. Typ. Max.
Vref
Reference Input Voltage - (figure 1)
VKA = Vref, IK = 10mA
V
Tamb = 25oC
2.490 2.500 2.510 2.493 2.500 2.507
∆Vref
Reference Input Voltage Deviation Over
Temperature Range - (figure 1, note1)
VKA = Vref, IK = 10mA, Tmin. ≤ Tamb ≤ Tmax.
mV
3
20
3
20
∆Vref
∆T
Temperature Coefficient of Reference Input
Voltage - (note 2)
ppm/oC
mV/V
µA
VKA = Vref, IK = 10mA, Tmin. ≤ Tamb ≤ Tmax.
±13
-1.1
1.5
±90
±13
-1.1
1.5
±90
∆Vref
∆VKA
Ratio of Change in Reference Input Voltage to
Change in Cathode to Anode Voltage - (figure 2)
IK = 10mA, ∆VKA = 36V to 3V
-2
-2
Iref
Reference Input Current - (figure 2)
IK = 10mA, R1 = 10kΩ, R2 = ∞
Tamb = 25oC
2.5
3
2.5
3
Tmin. ≤ Tamb ≤ Tmax.
∆Iref
Reference Input Current Deviation Over
Temperature Range - (figure 2)
IK = 10mA, R1 = 10kΩ, R2 = ∞
µA
0.2
1.2
0.2
1.2
Tmin. ≤ Tamb ≤ Tmax.
Imin
Minimum Cathode Current for Regulation - (figure
mA
1)
0.5
180
0.2
1
0.5
180
0.2
0.6
500
0.5
VKA = Vref
Ioff
|ZKA
Off-State Cathode Current - (figure 3)
500
0.5
nA
|
Dynamic Impedance - (figure 1, note 3)
Ω
VKA = Vref, ∆IK = 1 to 100mA, f ≤ 1kHz
Notes : 1. ∆Vref is defined as the difference between the maximum and minimum values obtained over the full temperature
range.
∆Vref = Vref max. - Vref min
Vref ma x.
Vre fmin.
Tempera ture
T2
T1
2. The temperature coefficient is defined as the slopes (positive and negative) of the voltage vs temperature limits whithin
which the reference voltage is guaranteed.
m ax
2.5V
min
Te m pera ture
2
5 C
∆VKA
∆IK
3. The dynamic Impedance is defined as |ZKA| =
2/8
TL1431
ELECTRICAL CHARACTERISTICS
Tamb = 25oC (unless otherwise specified)
TL1431I
TL1431AI
Symbol
Parameter
Unit
Min. Typ. Max. Min. Typ. Max.
Vref
Reference Input Voltage - (figure 1)
VKA = Vref, IK = 10mA
V
Tamb = 25oC
2.490 2.500 2.510 2.493 2.500 2.507
∆Vref
Reference Input Voltage Deviation Over
Temperature Range - (figure 1, note1)
VKA = Vref, IK = 10mA, Tmin. ≤ Tamb ≤ Tmax.
mV
ppm/oC
mV/V
µA
7
30
±100
-2
7
30
±100
-2
∆Vref
∆T
Temperature Coefficient of Reference Input
Voltage - (note 2)
VKA = Vref, IK = 10mA, Tmin. ≤ Tamb ≤ Tmax.
±22
-1.1
1.5
±22
-1.1
1.5
∆Vref
∆VKA
Ratio of Change in Reference Input Voltage to
Change in Cathode to Anode Voltage - (figure 2)
IK = 10mA, ∆VKA = 36 to 3V
Iref
Reference Input Current - (figure 2)
IK = 10mA, R1 = 10kΩ, R2 = ∞
Tamb = 25oC
2.5
3
2.5
3
Tmin. ≤ Tamb ≤ Tmax.
∆Iref
Reference Input Current Deviation Over
Temperature Range - (figure 2)
IK = 10mA, R1 = 10kΩ, R2 = ∞
µA
0.5
1
0.8
1.2
Tmin. ≤ Tamb ≤ Tmax.
Imin
Minimum Cathode Current for Regulation
mA
(figure 1)
VKA = Vref
0.5
180
0.2
1
0.5
180
0.2
0.7
500
0.5
Ioff
|ZKA
Off-State Cathode Current - (figure 3)
500
0.5
nA
|
Dynamic Impedance - (figure 1, note 3)
Ω
VKA = Vref, ∆IK = 1 to 100mA, f ≤ 1kHz
Notes : 1. ∆Vref is defined as the difference between the maximum and minimum values obtained over the full temperature
range.
∆Vref = Vref max. - Vref min
Vre fmax.
Vref min.
Temperature
T1
T2
2. The temperature coefficient is defined as the slopes (positive and negative) of the voltage vs temperature limits whithin
which the reference voltage is guaranteed.
m ax
2.5V
min
Te m pera ture
25
C
∆VKA
∆IK
3. The dynamic Impedance is defined as |ZKA| =
3/8
TL1431
Figure 1 : Test Circuit for VKA = Vref
Figure 2 : Test Circuit for VKA > Vref
V
Input
KA
VKA
Input
I
IK
K
R
1
Ire f
R
2
V
ref
V
re f
R1
R2
VKA = Vref (1 +
) + Iref . R1
Figure 3 : Test Circuit for Ioff
Figure 4 : Test Circuit for Phase Margin and
Voltage Gain
= 36V
VKA
Input
10µF
Vka
Output
Ioff
Ik=10mA
15K
230
10µF
Iref
Input
8.25K
Vref
4/8
TL1431
DRIFT (mV) vs TEMPERATURE (oC)
CATHODE CURRENT vs CATHODE VOLTAGE
Vka = Vref
Ik = 10mA
Vka = Vref = 2.5V
Vref drift (mV)
0
-2
-4
-6
-8
-10
-12
-14
-40
-20
0
20
40
60
80
100
120
Temperature (°C)
CATHODE CURRENT vs CATHODE VOLTAGE
(detailed version)
REFERENCE CURRENT vs TEMPERATURE
Ik = 10mA
Vka = Vref
Vka = Vref
Iref (µA)
2
1,8
1,6
1,4
1,2
1
-40
-20
0
20
40
60
80
100
120
Temperature (°C)
OFF-STATE CATHODE CURRENT vs
TEMPERATURE
RATIO OF CHANGE IN Vref TO CHANGE IN
VKA vs TEMPERATURE
Ik = 10mA
Vka = Vref = 2.5V
d(Vref) / d(Vka) (mV/V)
Ioff (µA)
-0,9
0,1
-1
0,08
0,06
0,04
0,02
0
-1,1
-1,2
-1,3
-1,4
-1,5
-1,6
-40
-20
0
20
40
60
80
100
120
-40
-20
0
20
40
60
80
100
120
Temperature (°C)
Temperature (°C)
5/8
TL1431
DRIFT OF RKA vs TEMPERATURE
MINIMUM OPERATING CURRENT vs
TEMPERATURE
Ik = 10mA
Vka = Vref = 2.5V
Ik = Ikmin.
Vka = Vref
Drift (Ohms)
Imin (mA)
0
0,52
0,5
-0,01
-0,02
-0,03
0,48
0,46
0,44
0,42
0,4
-0,04
-40
-40
-20
0
20
40
60
80
100
120
-20
0
20
40
60
80
100 120
Temperature (°C)
Temperature (°C)
PHASE MARGIN vs FREQUENCY
STABILITY FOR CAPACITIVE LOADS
Ik = 10mA
Phase (°)
Gain (dB)
Current (mA)
120
200
60
50
40
30
20
10
0
Gain
100
80
60
40
20
0
100
Phase
0
-100
-200
-10
-20
-30
-40
1E-10
1E-9
1E-8
1E-7
0,000001
0,00001
Capacitive loads (F)
1
3
10
30
100
300
1,000
3,000
10,000
2.5V
5.0V
10 V
15 V
20 V
28 V
Frequency (KHz)
6/8
TL1431
PACKAGE MECHANICAL DATA
8 PINS - BATWING PLASTIC MICROPACKAGE (SO)
Millimeters
Dimensions
Inches
Typ.
Min.
Typ.
Max.
1.75
0.25
1.65
0.85
0.48
0.25
0.5
Min.
Max.
0.069
0.010
0.065
0.033
0.019
0.010
0.020
A
a1
a2
a3
b
0.1
0.004
0.65
0.35
0.19
0.25
0.026
0.014
0.007
0.010
b1
C
c1
D
45o (typ.)
4.8
5.8
5.0
6.2
0.189
0.228
0.197
0.244
E
e
1.27
3.81
0.050
0.150
e3
F
3.8
0.4
4.0
1.27
0.6
0.150
0.016
0.157
0.050
0.024
L
M
S
8o (max.)
7/8
TL1431
PACKAGE MECHANICAL DATA
3 PINS - PLASTIC PACKAGE TO92
Millimeters
Inches
Typ.
Dimensions
Min.
Typ.
1.27
3.7
Max.
Min.
Max.
L
B
0.05
3.2
4.45
4.58
12.7
0.407
0.35
4.2
5.2
0.126
0.1752
0.1803
0.5
0.1457
0.1969
0.198
0.1654
0.2047
0.2098
O1
C
5.00
5.03
5.33
K
O2
a
0.5
0.508
0.016
0.0138
0.0197
0.02
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility
for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics.
Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life
support devices or systems without express written approval of SGS-THOMSON Microelectronics.
1998 SGS-THOMSON Microelectronics – Printed in Italy – AllRights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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8/8
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