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Part: TL1431C
Category:
Power Management
-> Voltage References
Description: Programmable Voltage Reference
Company: ST Microelectronics, Inc.
Datasheet: Download TL1431C 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 with guaranteed temperature stability over the entire temperature range of operation. The output voltage may be set to any value bet ween 2.5V and 36V with two external resistors. The TL1431 operates with a wide current range from 1 to 100mA with a typical dynamic impedance of 0.2. ORDER CODE
Part Number TL1431C/AC TL1431I/AI Temperature Range -20°C, +70°C -40°C, +105°C Package Z · · D · · D SO8 (Batwing Plastic Micropackage) Z TO92 (Plastic Package)
2.5 to 36V
Z = TO92 Plastic package - also available in Bulk (Z), Tape & Reel (ZT) and Ammo Pack (AP) D = Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONNECTIONS (top view)
TO92 (Top view)
Cat h o d e A n o d e Ref er en c e
1 2 3
SO8 (Top view)
8 7 6 5
12345678-
Cathode Anode Anode. N.C. N.C. Anode Anode. Reference
1
2
3
4
March 2002
1/11
TL1431
AB SOLUTE MAXIMUM RATINGS
Symbol VKA IK IREF pd TStg TJ Cathode to Anode Voltage Continuous Cathode Current Range Reference Input Current Range Power Dissipation
1)
Parameter
Value 37 -100 to +150 -0.05 to +10
Unit V mA mA mW °C °C
TO92 SO8 batwing
625 960 -65 to +150 +150
Storage Temperature Range Junction temperature
1. Pd is calculated with T amb = +25°C, T j = +150°C and Rthja = 200°C/W for TO92 package = 130°C/W for SO8 batwing package
OPERATING CONDITIONS
Symbol VKA IK Tamb Cathode to Anode Voltage Cathode Current Operating Free-air Temperature Range TL1431C/AC TL1431I/AI Parameter Value VREF to 36 1 to 100 -20 to +70 -40 to +105 Unit V mA °C
2/11
TL1431
ELECTRICAL CHARACTERISTICS Tamb = 25°C (unless otherwise specified)
TL1431C Symbol Parameter Min. VREF VREF Reference Input Voltage - (figure 1) VKA = VREF, IK = 10 mA Reference Input Voltage Deviation OverTemperature Range - (figure 1, note 1) VKA = VREF, IK = 10 mA,TMIN TAMB TMAX Typ. Max. Min. Typ. Max. V TL1431AC Unit
2.490 2.500 2.510 2.493 2.500 2.507
3
20
3
20
mV
VR E F Temperature Coefficient of Reference Input Voltage -------------------- (note 2) T VKA = VREF, IK = 10 mA,TMIN TAMB TMAX
Ratio of Change in Reference Input Voltage to V REF -------------------- Change in Cathode to Anode Voltage - (figure 2) V IK = 10mA, VKA = 36V to 3V KA IREF Reference Input Current - (figure 2) IK = 10mA, R1 = 10k, R2 = TMIN TAMB TMAX Reference Input Current Deviation Over Temperature Range -(figure 2) IK = 10mA, R1 = 10k, R2 = TMIN TAMB TMAX Minimum Cathode Current for Regulation - (figure1) VKA = VREF Off-State Cathode Current (figure 3)
±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 ZKA
Dynamic Impedance ( note 3 ) VKA = VREF , IK = 1 to100mA, f 1kHZ
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 ref max.
V ref min. T1 T2 Temperature
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
ppm
Max 2.5V min
/°C
+n p
pm/
°C
Temperature 25°C
V KA 3) The dynamic Impedance is defined as ZK A = ---------------IK
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