SGS Thomson Microelectronics TL1431C, TL1431ACZ, TL1431ACD, TL1431IZ, TL1431IN Datasheet

TL1431

PROGRAMMABLE VOLTAGE REFERENCE

.ADJUSTABLE OUTPUT VOLTAGE :

.Vref to 36V

.SINK CURRENT CAPABILITY : 1 to 100mA

.TYPICAL OUTPUT IMPEDANCE : 0.2Ω 0.4% AND 0.25% VOLTAGE PRECISION

DESCRIPTION

The TL1431 is a programmable shunt voltage reference with guaranteed temperature stability over the entire temperature range of operation.

The output voltage may be set to any value between Vref (approximately 2.5V) and 36V with two external resistors.

The TL1431 operates with a wide current range from 1 to 100mAwith a typical dynamic impedance of 0.2Ω.

PIN CONNECTIONS

TO92

(Top view)

Ca th o d e Ano d e Re fer e n c e

1

2

3

Z

TO92

(Plastic Package)

D

SO8

(Batwing Plastic Micropackage)

ORDER CODES

	Part number	Temperature Range	Package
			Z	D
	TL1431C/AC	-20oC, +70oC	•	•
	TL1431I/AI	-40oC, +105oC	•	•

SO8

(Top view)

8

7

6

5

1 - Cathode

2 - Anode

3 - Anode

4 - N.C.

5 - N.C.

6 - Anode

7 - Anode

8 - Reference

1

2

3

4

March 1998

1/8

TL1431

ABSOLUTE MAXIMUM RATINGS

Symbol	Parameter		Value	Unit
VKA	Cathode to Anode Voltage		37	V
IK	Continuous Cathode Current Range		-100 to +150	mA
Iref	Reference Input Current Range		-0.05 to +10	mA
Toper	Operating Free-air Temperature Range	TL1431C/AC	-20 to +70	oC
	TL1431I/AI		-40 to +105
Tstg	Storage Temperature Range		-65 to +150	oC

OPERATING CONDITIONS

Symbol	Parameter	Value	Unit
VKA	Cathode to Anode Voltage	Vref to 36	V
IK	Cathode Current	1 to 100	mA

ELECTRICAL CHARACTERISTICS

Tamb = 25oC (unless otherwise specified)

Symbol		Parameter				TL1431C		TL1431AC			Unit
					Min. Typ. Max. Min. Typ. Max.
Vref	Reference Input Voltage - (figure 1)										V
	VKA = Vref, IK = 10mA			Tamb = 25oC	2.490	2.500	2.510	2.493	2.500	2.507
Vref	Reference Input Voltage Deviation Over										mV
	Temperature Range - (figure 1, note1)
	VKA = Vref, IK = 10mA, Tmin. ≤			Tamb ≤ Tmax.		3	20		3	20
Vref	Temperature Coefficient of Reference Input										ppm/oC
T	Voltage - (note 2)
	VKA = Vref, IK = 10mA, Tmin. ≤ Tamb ≤ Tmax.					±13	±90		±13	±90
Vref	Ratio of Change in Reference Input Voltage to										mV/V
VKA	Change in Cathode to Anode Voltage - (figure 2)
	IK = 10mA,	VKA = 36V to 3V			-2	-1.1		-2	-1.1
Iref	Reference Input Current - (figure 2)										μA
	IK = 10mA, R1 = 10kΩ, R2 =			∞
		Tamb	= 25oC			1.5	2.5		1.5	2.5
		Tmin.	≤ Tamb ≤ Tmax.				3			3
Iref	Reference Input Current Deviation Over										μA
	Temperature Range - (figure 2)
	IK = 10mA, R1 = 10kΩ, R2 =			∞		0.2	1.2		0.2	1.2
		Tmin.	≤ Tamb ≤ Tmax.
Imin	Minimum Cathode Current for Regulation - (figure					0.5	1		0.5	0.6	mA
	1)
	VKA = Vref
Ioff	Off-State Cathode Current - (figure 3)					180	500		180	500	nA
|ZKA|	Dynamic Impedance - (figure 1, note 3)										Ω
	VKA = Vref,	IK = 1 to 100mA, f ≤ 1kHz				0.2	0.5		0.2	0.5
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				V re f ma x.
				Vre fm in.
				T1	T2	Tempe ra tur e

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.

-n
p	p
	m/	C

m a x 2.5V min

3. The dynamic Impedance is defined as |ZKA| =	VKA
	IK

	m	/ C
+	npp

Te m pe ra ture

25 C

2/8

							TL1431
ELECTRICAL CHARACTERISTICS
Tamb = 25oC (unless otherwise specified)
Symbol	Parameter		TL1431I		TL1431AI		Unit
			Min. Typ. Max. Min. Typ. Max.
Vref	Reference Input Voltage - (figure 1)						V
	VKA = Vref, IK = 10mA	Tamb = 25oC	2.490 2.500	2.510	2.493 2.500	2.507
Vref	Reference Input Voltage Deviation Over						mV
	Temperature Range - (figure 1, note1)
	VKA = Vref, IK = 10mA, Tmin. ≤	Tamb ≤ Tmax.	7	30	7	30
Vref	Temperature Coefficient of Reference Input						ppm/oC
T	Voltage - (note 2)
	VKA = Vref, IK = 10mA, Tmin. ≤ Tamb ≤ Tmax.		±22	±100	±22	±100
Vref	Ratio of Change in Reference Input Voltage to						mV/V
VKA	Change in Cathode to Anode Voltage - (figure 2)
	IK = 10mA, VKA = 36 to 3V		-1.1	-2	-1.1	-2
Iref	Reference Input Current - (figure 2)						μA
	IK = 10mA, R1 = 10kΩ, R2 =	∞
	Tamb = 25oC		1.5	2.5	1.5	2.5
	Tmin. ≤ Tamb ≤ Tmax.			3		3
Iref	Reference Input Current Deviation Over						μA
	Temperature Range - (figure 2)
	IK = 10mA, R1 = 10kΩ, R2 =	∞	0.5	1	0.8	1.2
	Tmin. ≤ Tamb ≤ Tmax.
Imin	Minimum Cathode Current for Regulation		0.5	1	0.5	0.7	mA
	(figure 1)
	VKA = Vref
Ioff	Off-State Cathode Current - (figure 3)		180	500	180	500	nA
|ZKA|	Dynamic Impedance - (figure 1, note 3)						Ω
	VKA = Vref, IK = 1 to 100mA, f ≤ 1kHz		0.2	0.5	0.2	0.5

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 fma x.

Vref min.

T1	Tempera ture
	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.

-n	p
	p
	m/	C

	m a x
	2.5V
	min
3. The dynamic Impedance is defined as |ZKA| =	VKA
	IK

		ppm	/ C
+	n

Te m pe ra ture

25 C

3/8