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Part: TL1431AIDT
Category:
Description: Programmable Voltage Reference
Company: ST Microelectronics, Inc.
Datasheet: Download TL1431AIDT datasheet File size : 648 kB
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Datasheet text preview:
TL1431
PROGRAMMABLE VOLTAGE REFERENCE
s ADJUSTABLE OUTPUT VOLTAGE : s SINK CURRENT CAPABILITY : 1 to 100mA s TYPICAL OUTPUT IMPEDANCE : 0.2 s 0.4% AND 0.25% PRECISION
DESCRIPTION The TL1431 is a programmable shunt voltage reference wit h guaranteed t emperature st ability over the entire temperature range of operation. The output voltage may be set t o any value between 2.5V and 36V with tw o ext ernal resistors. The TL1431 operates wit h a wide current range from 1 to 100mA w ith a typical dynamic impedance of 0.2. ORDER CODE
Part Numb er TL1431C/AC TL1431I/AI Temperature Range -20°C , +70°C -40°C, +105°C Pa ckage Z · · D · · D SO 8 ( Batwing Pl astic Micropackage) Z TO92 (P lastic Pack age)
2.5 to 36V
Z = TO92 Plastic p ackage - a lso a vailable in Bulk ( Z), Tape & Reel (ZT) a nd Ammo Pack (AP) D = Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONN ECTIONS (top view)
TO92 (Top view)
C ath o de A no de R ef eren ce
1 2 3
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
M arch 2002
1/11
TL1431
ABSOLUTE MAXIMUM RATINGS
S ymbol VKA IK IREF pd TStg TJ Cathode to An ode Voltage Continuous Cathode Current Range Reference Inp ut C urrent Range Po wer D issipation
1)
Parameter
Value 37 -100 t o +150 -0.05 to + 10
Unit V mA mA mW °C °C
TO92 SO8 batwing
625 960 -65 to +1 50 +150
Sto rage Temperature Range Junction temperature
1. Pd is calculated with T amb = +2 5°C, Tj = +150°C a nd Rthja = 200°C /W for TO92 package = 130°C/W for SO8 b atwing package
OPERATING CONDITIONS
S ymbol VKA IK Tam b Cathode to An ode Voltage Cathode Current Op erating Free-air Temperature Range TL1 431C/AC TL1 431I/A I Parameter Value VREF to 36 1 to 100 -20 to + 70 -40 to +1 05 Unit V mA °C
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TL1431
ELECTRICAL CHARACTERISTICS Tamb = 25°C (unless otherwise specified)
TL1 431C Symbol Parameter Min. VREF VREF R eference In put Voltage - (figure 1) VKA = VREF, IK = 1 0 mA R eference Input Voltage Deviation OverTemperature R ange - (figure 1, note 1) VKA = VREF, IK = 10 mA, TMIN TAMB T MAX 2.490 Typ. Max. M in. Typ. M ax. 2.507 V T L1431AC Unit
2.500 2.510 2.493 2.500
3
20
3
20
mV
Temperature Coefficient of Reference Input Voltage V RE F ------------------- (note 2) T VKA = VREF, IK = 10 mA ,TMIN TAMB TMA X R atio o f Change in Reference Input Voltage to V REF ------------------- C hange in C athode to Anode Voltage - (figure 2) V IK = 10mA, VKA = 36V to 3V KA IREF R eference In put C urrent - (figure 2 ) IK = 10mA, R1 = 10k, R2 = TMIN TAMB TMAX R eference In put C urrent Deviation Over Temperature Range -(figure 2 ) IK = 10mA, R1 = 10k, R2 = TMIN TAMB TMAX M inimum Cat hode Current for Regulation - (figure1) VKA = VREF O ff-State Cathode Current (figure 3) Dynamic Imp edance ( note 3 ) VKA = VREF , I K = 1 to100mA, f 1kHZ
± 13
± 90
± 13
± 90
ppm/° C
-2
- 1.1 1.5 2.5 3
-2
-1.1 1.5 2.5 3
mV/V µA
IREF
0.2 0.5 180 0.2
1.2 1 500 0.5
0.2 0.5 180 0.2
1.2 0.6 500 0.5
µA mA nA
IMIN IOFF ZK A
1) V REF is defined as the difference between the maximum and minimum values obtained over the full temperature range V REF = VREF m ax. - VREF min.
V ref max.
V ref min. T1 T2 Temp erature
2) The temperature coefficient is defined as the slopes (positive and negative) of the voltage vs temperature limits within which the reference is guaranteed.
-n
Max 2.5V min
pp
m/° C
+n
ppm
/°C
25 °C
Temperature
V K A --3) The d ynamic Impedance is defined as Z KA = ------------ IK
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