ST TS2431 PROGRAMMABLE SHUNT VOLTAGE REFERENCE handbook
Contents
1. T 25 C T 105 C Vka Vref 0 100 200 300 400 Ik Cathode current pA Dynamic impedance vs frequency 1000 10000 100000 1000000 Frequency Hz 3 6 TS2431 Off State current vs temperature Testcircuitfor Off State currentmeasurement Vka 24V o d D loff E 5 3 d 2 amp y EJ gt 20 40 60 80 100 Temperature C Ratio of change in reference input voltage to Test circuit for Vka gt Vref change in Vka voltage vs temperature AVref AVka mV V IIT Vka Vref 1 R1 R2 Iref R1 20 40 60 80 Temperature C Phase and Gain vs frequency Test circuit for phase and gain measurement Gain dB fin toma 20 Frequency KH3 dl 4 6 TS2431 Pulse response at Ik 1mA Test circuit for pulse response at Ik 1mA Input voltage Pulse Generator F 100kHz 0 to 5V Output voltage Voltage V 1 0 Time us Equivalent input noise vs frequency 6 3002. Input voltage 2 _ ne g 50 4 200 2 2 Ik 1mA to 0 ae Vka Vref T 25 C gt 150 IkeimA T 25 C 2 Output voltage 2 100 zZ 50 0 0 0 0 0 5 1 0 125 2 0 0 1 10 100 1000 Time us Frequency KHz Stability boundary conditions Block Diagram Cathode al Instable EEL NE 0 1E 10 df 1E 8 1E 7 Cathode current mA Capacitive load F 7 5 6 TS2431 PACKAGE MECHANICAL DATA 3 PINS TINY PACKAGE SOT 23 SEATING PLANE c Min 0 890 m m f oo a E ee A Al Information furnished is believed to be accurate and reliable However STMicroelectronics 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 STMicroelectronics Specifications mentioned in this publication are subject to change without notice This publication supersedes and replaces all information previously supplied STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics The ST logo is a registered trademark of STMicroelectronics 2002 STMicroelectronics Printed in Italy All Rig
3. O 0 7824310 0 0 yy TS2431 PROGRAMMABLE SHUNT VOLTAGE REFERENCE ADJUSTABLE OUTPUT VOLTAGE 2 5 to 24V SEVERAL PRECISION 25 C 2 1 and 0 5 SINK CURRENT CAPABILITY 1 to 100mA INDUSTRIAL TEMPERATURE RANGE 40 to 105 C PERFORMANCES COMPATIBLE WITH INDUSTRY STANDARD TL431 DESCRIPTION The TS2431 is a programmable shunt voltage L reference with guaranteed temperature stability SOT23 3L over the entire temperature range of operation Plastic Micropackage 40 to 105 C The output voltage may be set to any value between 2 5V and 24V with an external resistor bridge Available in SOT23 3 surface mount package it can be designed in applications where space saving is a critical issue PIN CONNECTIONS top view APPLICATION Computers Instrumentation Battery chargers Switch Mode Power Supply Battery operated equipments ORDER CODE Part Number SOT23 in SOT23 3 Marking TS2431ILT L285 Reference E 2 TS2431AILT L286 TS2431BILT L287 Single temperature range 40 to 105 C SOT23 3 LT Tiny Package SOT23 3 only available in Tape amp Reel LT February 2002 1 6 TS2431 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit Vka Cathode to Anode voltage 25 V Ik Reverse Breakdown Current 100 to 150 mA REE Reference input current range 0 05 to 10 mA Pa Power Dissipation SOT23 3 360 mW Tstd Storage Temperature 65 to 150 C E
4. SD Human Body Model HBM 2 kV Machine Model MM 200 V TLEaD Lead Temperatue soldering 10 seconds 260 C 1 Pd has been calculated with Tamb 25 C Tjunction 150 C and Rthja 340 C W for the SOT23 3 package OPERATING CONDITIONS Symbol Parameter Value Unit Vka Cathode to Anode voltage Vaer to 24 V Ik Cathode operating current 1 to 100 mA Toper Operating Free Air Temperature Range 40 to 105 C 1 Maximum power dissipation must be strictly observed to avoid the component destruction ELECTRICAL CHARACTERISTICS TaMBIENT 20 C unless otherwise specified Symbol Parameter Test Condition Min Typ Max Unit Vrer Reference input Voltage VKk VREE Ik 10mA 2 5 TS2431 2 2 45 2 55 Vv TS2431A 1 2 475 2 525 TS2431B 0 5 2 488 2 512 Reference input Voltage deviation over 0 C lt T lt 70 C 10 20 IAVREFI temperature Vk VREr lk 10mMmA 40 C lt T lt 85 C 17 30 mV note 1 2 40 C lt T lt 105 C 20 35 Tc Temperature coefficient note 2 40 C lt T lt 105 C 50 100 ppm C Ikmin Minimum Operating Current ee LHC a s mA Ratio of change in reference input IK 10mA AVre voltage to change in cathode to anode 0 3 2 mV V el voltage Vka 24 to 2 5V Reference input current T 25 C 0 5 2 5 A REF 1k 10mA R1 10KQ R2 00 note 3 40 C lt T lt 105 C 3 H Reference i
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6. nput current deviation 5 lAlaeel 10mA R1 10KQ R2 00 note 3 40 C lt T lt 105 C 04 12 HA loer _ Off state cathode current VKk 24V VREr GND 10 500 nA ici Vk VREF IZxal Reverse dynamic impedance Alk 1 to 50mA f lt 10kHz 0 5 0 75 Q En Wide Band Noise Ix 10m4 300 nVAHz 10Hz lt f lt 10kHz Note 1 Limits are 100 production tested at 25 C Limits over temperature are guaranteed through correlation and by design Note 2 lAVgaerl is defined as the difference between the maximum and minimum values of VRFF obtained over the full temperature range Note 3 Refer to figure Test circuit for Vka gt Vref page 4 2 6 ky Reference voltage vs temperature Ik 10 mA Vka Vref gt co Q D o D o 5 5 gt 20 40 60 80 100 Temperature C Vka Cathode voltage V 0 10 0 05 0 00 0 05 0 10 Ika Cathode current A Reference input current vs temperature 1 00 T 2 E Ik 10mA 2 0 75 R1 10KQ 3 R2 00 5 a 0 50 amp S v 5 E 0 25 0 00 40 20 0 20 40 60 80 100 Temperature C 7 TS2431 Test circuit for Vka Vref Vka Cathode voltage V Zka Dynamic impedance Ohms 0 10 100 Cathode voltage vs cathode current
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ST TS2431 PROGRAMMABLE SHUNT VOLTAGE REFERENCE handbook