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Partno	Mfg	Dc	Qty	Available	Descript
TL1431AC		N/a	2000	avai	PROGRAMMABLE VOLTAGE REFERENCE
TL1431C	ST	N/a	1657	avai	PROGRAMMABLE VOLTAGE REFERENCE
TL1431I	ST	N/a	855	avai	PROGRAMMABLE VOLTAGE REFERENCE

TL1431AC ,PROGRAMMABLE VOLTAGE REFERENCETL1431PROGRAMMABLE VOLTAGE REFERENCE.ADJUSTABLE OUTPUT VOLTAGE :V to 36Vref.SINK CURRENT CAPABILITY ..
TL1431ACD ,PROGRAMMABLE VOLTAGE REFERENCETL1431PROGRAMMABLE VOLTAGE REFERENCE ■ ADJUSTABLE OUTPUT VOLTAGE : 2.5 to 36V■ SINK CURRENT CAP ..
TL1431ACDT ,PROGRAMMABLE VOLTAGE REFERENCEABSOLUTE MAXIMUM RATINGS Symbol Parameter Value UnitV Cathode to Anode Voltage 37 VKAIContinuo ..
TL1431ACZ ,PROGRAMMABLE VOLTAGE REFERENCEELECTRICAL CHARACTERISTICST = 25°C (unless otherwise specified) amb TL1431C TL1431ACSymbol Par ..
TL1431AID ,PROGRAMMABLE VOLTAGE REFERENCEELECTRICAL CHARACTERISTICST = 25°C (unless otherwise specified)amb TL1431I TL1431AISymbol Par ..
TL1431AIZ ,PROGRAMMABLE VOLTAGE REFERENCETL1431PROGRAMMABLE VOLTAGE REFERENCE ■ ADJUSTABLE OUTPUT VOLTAGE : 2.5 to 36V■ SINK CURRENT CAP ..
TLV2463IDGS ,Dual Low-Power, Rail-to-Rail Input/Output Operational Amplifier w/ShutdownWWW.TI.COMDevice TLV2465A is Obsolete ..
TLV2463IDGSR ,Dual Low-Power, Rail-to-Rail Input/Output Operational Amplifier w/ShutdownDevice TLV2465A is Obsolete ..
TLV2463IN ,Dual Low-Power, Rail-to-Rail Input/Output Operational Amplifier w/ShutdownWWW.TI.COMDevice TLV2465A is Obsolete ..
TLV2464 ,Quad Low Power, Rail-to-Rail Input/Output Operational AmplifierWWW.TI.COMDevice TLV2465A is Obsolete ..
TLV2464AID ,Quad Low Power, Rail-to-Rail Input/Output Operational AmplifierDevice TLV2465A is Obsolete ..
TLV2464AIDR ,Quad Low Power, Rail-to-Rail Input/Output Operational AmplifierWWW.TI.COMDevice TLV2465A is Obsolete ..

TL1431AC-TL1431C-TL1431I
PROGRAMMABLE VOLTAGE REFERENCE
- Cathode- Anode- Anode- N.C.- N.C.- Anode- Anode- ReferenceTO92
(Plastic Package) ADJUSTABLE OUTPUT VOLTAGE:
Vrefto 36V. SINK CURRENT CAPABILITY:1to 100mA. TYPICAL OUTPUT IMPEDANCE: 0.2Ω. 0.4% AND 0.25% VOLTAGE PRECISION
DESCRIPTION
The TL1431isa programmable shunt voltage ref-
erence with guaranteed temperature stability over
the entire temperature rangeof operation.
The output voltage may be setto any value be-
tween Vref (approximately 2.5V) and 36V with two
external resistors.
The TL1431 operates witha wide current range
from1to 100mAwitha typical dynamicimpedance 0.2Ω.
PIN CONNECTIONS 65 34
SO8
(Top view)
Cathode Anode Reference 3
TO92
(Top view)
SO8
(Batwing Plastic Micropackage)
PROGRAMMABLE VOL TAGE REFERENCE
TL1431
ORDER CODES
Part number Temperature Range Package
TL1431C/AC -20oC, +70oC ••
TL1431I/AI -40oC, +105oC ••
March 1998 1/8
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VKA Cathodeto Anode Voltage 37 V Continuous Cathode Current Range -100to +150 mA
Iref Reference Input Current Range -0.05to +10 mA
Toper Operating Free-air Temperature Range TL1431C/AC
TL1431I/AI
-20to +70
-40to +105C
Tstg Storage Temperature Range -65to +150 oC
OPERATING CONDITIONS
Symbol Parameter Value Unit
VKA Cathodeto Anode Voltage Vrefto36 V Cathode Current 1to 100 mA
ELECTRICAL CHARACTERISTICS
Tamb =25oC (unless otherwise specified)
Symbol Parameter TL1431C TL1431AC UnitMin. Typ. Max. Min. Typ. Max.
Vref Reference InputVoltage- (figure1)
VKA =Vref,IK= 10mA Tamb=25oC 2.490 2.500 2.510 2.493 2.500 2.507
ΔVref Reference InputVoltage Deviation Over
Temperature Range- (figure1, note1)
VKA =Vref,IK= 10mA, Tmin.≤ Tamb≤ Tmax. 320 3 20
ΔVref
Temperature Coefficientof ReferenceInput
Voltage- (note2)
VKA =Vref,IK= 10mA, Tmin.≤ Tamb≤ Tmax. ±13 ±90 ±13 ±90
ppm/oC
ΔVref
ΔVKA
Ratioof Changein Reference Input Voltageto
Changein Cathodeto Anode Voltage- (figure2)= 10mA, ΔVKA= 36Vto3V -2 -1.1 -2 -1.1
mV/V
Iref Reference InputCurrent- (figure2)= 10mA,R1= 10kΩ,R2=∞
Tamb =25oC
Tmin.≤ Tamb≤ Tmax.
1.5 2.5
1.5 2.5
ΔIref Reference InputCurrent Deviation Over
Temperature Range- (figure2)= 10mA,R1= 10kΩ,R2=∞
Tmin.≤ Tamb≤ Tmax.
0.2 1.2 0.2 1.2
Imin Minimum Cathode Currentfor Regulation- (figure
VKA =Vref
0.5 1 0.5 0.6
Ioff Off-State Cathode Current- (figure3) 180 500 180 500 nA
|ZKA| Dynamic Impedance- (figure1, note3)
VKA =Vref, ΔIK=1to 100mA,f≤ 1kHz 0.2 0.5 0.2 0.5 T2 Temperature
Vrefmax.
Vrefmin.
Notes:1. ΔVrefis definedas thedifference betweenthe maximum and minimum values obtained over thefull temperature
range.
ΔVref =Vrefmax.-Vrefmin The temperature coefficientis definedasthe slopes (positiveand negative)of thevoltagevs temperature limits whithin
whichthe reference voltage isguaranteed. The dynamic Impedanceis definedas |ZKA|= ΔVKA
ΔIK
25 C Temperature
max
2.5V
min
-nppm/ nppm
/ C
TL1431
2/8
ELECTRICAL CHARACTERISTICS
Tamb =25oC (unless otherwise specified)
Symbol Parameter TL1431I TL1431AI Unit
Min. Typ. Max. Min. Typ. Max.
Vref Reference InputVoltage- (figure1)
VKA =Vref,IK= 10mA Tamb=25oC 2.490 2.500 2.510 2.493 2.500 2.507
ΔVref Reference InputVoltage Deviation Over
Temperature Range- (figure1, note1)
VKA =Vref,IK= 10mA, Tmin.≤ Tamb≤ Tmax. 730 7 30
ΔVref
Temperature Coefficientof ReferenceInput
Voltage- (note2)
VKA =Vref,IK= 10mA, Tmin.≤ Tamb≤ Tmax. ±22 ±100 ±22 ±100
ppm/oC
ΔVref
ΔVKA
Ratioof Changein Reference Input Voltageto
Changein Cathodeto Anode Voltage- (figure2)= 10mA, ΔVKA=36to3V -1.1 -2 -1.1 -2
mV/V
Iref Reference InputCurrent- (figure2)= 10mA,R1= 10kΩ,R2=∞
Tamb =25oC
Tmin.≤ Tamb≤ Tmax.
1.5 2.5
1.5 2.5
ΔIref Reference InputCurrent Deviation Over
Temperature Range- (figure2)= 10mA,R1= 10kΩ,R2=∞
Tmin.≤ Tamb≤ Tmax.
0.5 1 0.8 1.2
Imin Minimum Cathode Currentfor Regulation
(figure1)
VKA =Vref
0.5 1 0.5 0.7
Ioff Off-State Cathode Current- (figure3) 180 500 180 500 nA
|ZKA| Dynamic Impedance- (figure1, note3)
VKA =Vref, ΔIK=1to 100mA,f≤ 1kHz 0.2 0.5 0.2 0.5 T2 Temperature
Vrefmax.
Vrefmin.
Notes:1. ΔVrefis definedas thedifference betweenthe maximum and minimum values obtained over thefull temperature
range.
ΔVref =Vrefmax.-Vrefmin The temperature coefficientis definedasthe slopes (positiveand negative)of thevoltagevs temperature limits whithin
whichthe reference voltage isguaranteed. The dynamic Impedanceis definedas |ZKA|= ΔVKA
ΔIK
25 C Temperature
max
2.5V
min
-nppm/ C
+nppm
/ C
TL1431
3/8
VKA=Vref(1+R1)+Iref .R1KAref
InputK
Figure1: Test Circuitfor VKA =Vref
VKA
Vref
Iref
Input
Figure2: Test Circuitfor VKA >VrefKAInput
Ioff
=36V
Figure3: Test CircuitforIoff
Input
Vka
Vref
Ik=10mA
Iref
Output
10μF
10μF
15K
8.25K
Figure4: Test Circuitfor Phase Margin and
Voltage Gain
TL1431
4/8
Vka =Vref
Vka =Vref= 10mA
Vka =Vref= 2.5V= 10mA
Vka =Vref =10mA
Vka =Vref= 2.5V
-40 -20 0 20 40 60 80 100 120-14
Temperature(°C)
Vrefdrift (mV)
DRIFT (mV)vs TEMPERATURE(oC)
CATHODE CURRENTvs CATHODE VOLTAGE
(detailed version)
-40 -20 0 20 40 60 80 100 1200
0,02
0,04
0,06
0,08
0,1
Temperature(°C)
Ioff (μA)
OFF-STATE CATHODE CURRENTvs
TEMPERATURE
CATHODE CURRENTvs CATHODE VOLTAGE
-40 -20 0 20 40 60 80 100 1201
1,2
1,4
1,6
1,8
Temperature(°C)
Iref(μA)
REFERENCE CURRENTvs TEMPERATURE
-40 -20 0 20 40 60 80 100 120-1,6
-1,5
-1,4
-1,3
-1,2
-1,1
-0,9
Temperature(°C)
d(Vref)/ d(Vka)(mV/V)
RATIO OF CHANGEIN Vref TO CHANGEIN
VKA vs TEMPERATURE
TL1431
5/8
=10mAVka =Vref= 2.5V Ik =Ikmin.
Vka =Vref =10mA
-40 -20 0 20 40 60 80 100 120-0,04
-0,03
-0,02
-0,01
Temperature (°C)
Drift (Ohms)
DRIFT OF RKA vs TEMPERATURE 3 10 30 100 300 1,000 3,000 10,000
Frequency (KHz)
Phase(°) Gain(dB)
Gain
Phase
PHASE MARGINvs FREQUENCY
1E-10 1E-9 1E-8 1E-7 0,000001 0,00001
Capacitiveloads(F)
Current (mA)
2.5V 5.0V10V 15V 20V28V
STABILITY FOR CAPACITIVE LOADS
-40 -20 0 20 40 60 80 100 1200,4
0,42
0,44
0,46
0,48
0,5
0,52
Temperature(°C)
Imin (mA)
MINIMUMOPERATING CURRENTvs
TEMPERATURE
TL1431
6/8

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