TS432 1.24V ADJUSTABLE SHUNT VOLTAGE REFERENCE ■ 1.24V TYP OUTPUT VOLTAGE ■ ULTRA LOW OPERATING CURRENT : 60µA maximum at 25°C ■ HIGH PRECISION @ 25°C +/- 1% +/- 0.5% ■ HIGH STABILITY WHEN USED WITH CAPACITIVE LOADS ■ INDUSTRIAL TEMPERATURE RANGE: -40 to +85°C ■ 100ppm/°C TEMPERATURE COEFFICIENT DESCRIPTION The TS432 is an adjustable low power shunt voltage reference providing an output voltage from 1.24V to 10V over the industrial temperature range (-40 to +85°C). Available in SOT23-3 surface mount package, it can be designed in applications where space saving is a critical issue. The low operating current is a key advantage for power restricted designs. In addition, the TS432 is very stable and can be used in a broad range of application conditions. L SOT23-3L (Plastic Micropackage) PIN CONNECTIONS (top view) APPLICATION ■ ■ ■ ■ ■ Computers SOT23-3 Instrumentation Battery chargers Ref Reference Switch Mode Power Supply Battery operated equipments A Anode ORDER CODE Precision SOT23-3 SOT23 Marking 1% TS432ILT 0.5% TS432AILT Single temperature range: -40 to +85°C K Cathode L235 L236 LT = Tiny Package (SOT23-3) - only available in Tape & Reel (LT) December 2002 1/7 TS432 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VK Cathode voltage 12 V IK Cathode current -10 to +20 mA IREF PD Reference input current Power dissipation 1) -0.05 to +3 mA 340 mW 360 °C/W SOT23-3 RTHJA Thermal resistance junction to ambient for TLEAD Lead temperature (soldering 10 seconds) SOT23-3 250 °C TSTG Storage temperature -65 to +150 °C TJ Junction temperature 150 °C Human Body Model (HBM) Machine Model (MM) 1.5 150 kV V Value Unit V ESD 1. Pd has been calculated with T amb = 25°C, Tj = 150°C and Rthja = 360°C/W for the SOT23-3L package OPERATING CONDITIONS Symbol Parameter VK Cathode voltage 1.24 to 10 IK Cathode current 60µ to 12m A Ambient temperature -40 to +85 °C TAMB ELECTRICAL CHARACTERISTICS Tamb = 25°C (unless otherwise specified) Symbol Parameter Test Condition Min. IK = 100µA, VK=VREF VREF ∆VREF IKMIN TS432 (1%) TS432A (0.5%) Reference voltage tolerance over temperature IK = 100µA, VK=VREF 7 Tamb = 25°C 40 Minimum operating current Reverse breakdown voltage change with operating current range 1.228 1.234 -40°C < TAMB < +85°C IK = 10mA, VK=10V to VREF V 16 mV 60 µA 1.5 2 4 1.8 2.5 2 mV 6 -40°C < TAMB < +85°C IK=10mA, R1=10KΩ, R2=+ ∞ 1.252 1.246 0.7 -40°C < TAMB < +85°C ∆VREF/ Reference voltage change with output voltage change ∆VK Unit 65 -40°C < TAMB < +85°C 1mA < IK < 12mA Max. 1.24 Reference voltage IKMIN < IK < 1mA ∆VREF Typ. 3 50 100 mV/V IREF Reference input current IOFF Off-state cathode current RKA Static impedance ∆IK = 100µA to 12mA 0.25 KVH Long term stability IK = 100µA, t = 1000hrs 120 ppm EN Wide band noise IK = 100µA 200 nV/√Hz -40°C < TAMB < +85°C VREF=0, VK=10V 200 1 -40°C < TAMB < +85°C 100Hz < F < 10kHz 150 Note : Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design. 2/7 100 0.5 nA nA Ω TS432 Reference voltage vs temperature Test circuit for VK = VREF Reference Voltage (V) 1.252 1.248 Input Output VK = VREF IK = 100µA 1.244 Ik 1.240 VK 1.236 1.232 VREF 1.228 -40 0 40 80 120 Temperature (°C) Cathode voltage vs cathode current Cathode voltage vs cathode current 1.5 VK Cathode voltage (V) IK Cathode current (mA) 10 VK = VREF TAMB = +25°C 5 0 TAMB=-40°C 1.0 TAMB=+25°C TAMB=+85°C 0.5 TAMB=+125°C -5 -10 -1.0 -0.5 0.0 0.5 1.0 0.0 1.5 0 20 VK Cathode voltage (V) Reference input current vs temperature 0.4 RKA Static impedance (Ohms) IREF Reference current (nA) 60 Static impedance vs temperature 100 IK = 10 mA R1 = 10 KΩ R2 = + ∞ 80 60 40 20 0 -40 40 IK Cathode current (µA) 0 40 Temperature (°C) 80 120 VK = VREF IK = 100 µA to 12 mA 0.3 0.2 0.1 0.0 -40 0 40 80 120 Temperature (°C) 3/7 TS432 Off-State current vs temperature Test circuit for Off-State current measurement IOFF Off-State current (nA) 150 Input VK =10V VREF = 0 V VK = 10 V 100 IOFF 50 0 -40 0 40 80 120 Temperature (°C) Ratio of change in Reference input voltage (mV/V) Ratio of change in reference input voltage to change in VK voltage vs temperature Test circuit for VKA > VREF 3 Input VK IK IK = 10 mA VK = 10V to VREF 2 R1 IRE F R2 1 0 -40 0 40 80 V REF V K = VREF . (1+R1/R2) + IREF . R1 120 Temperature (°C) Test circuit for phase and gain measurement Phase and Gain vs frequency 60 180 5V TAMB = +25°C Gain Gain (dB) 120 Phase 20 60 Phase (Degree) 40 23.5 kΩ 1 µF 22 µ F 33 kΩ Output 0 2 10 3 10 4 10 Frequency (Hz) 4/7 5 10 0 6 10 Input 33 kΩ TS432 Test circuit for pulse response at IK=100 µA 3V 18KΩ IK = 100µA Pulse Generator f=10KHz Pulse response at IK = 1mA Input and Output signals (Volt) Pulse response at IK = 100 µA Input and Ouput signals (Volt) IK=1mA Output Intput Pulse Generator f=10KHz 1.8KΩ 0V Output 0V Intput 3V Test circuit for pulse response at IK = 1 mA 3 Input 2 Output 1 3 Input IK = 1 mA TAMB = + 25°C 2 1 IK = 100 µA TAMB = + 25°C Output 0 0 0 5 10 0 15 5 3 Input 2 IK = 100 µA TAMB = + 25°C Input 2 1 Output 0 5 20 IK = 1 mA TAMB = + 25°C 3 Output 0 15 Pulse response at IK = 1mA Input and Output signals (Volt) Input and Output signals (Volt) Pulse response at IK = 100 µA 1 10 Time (µs) Time (µs) 10 Time (µs) 15 20 0 -5 0 5 10 15 20 Time (µs) 5/7 TS432 Equivalent input noise vs frequency Block diagram Cathode 300 Noise (nV/√Hz) TAMB = + 25°C Vref 200 + - 100 1.24V 0 2 10 3 10 4 10 5 10 6 10 7 10 Frequency (Hz) Anode 6/7 TS432 PACKAGE MECHANICAL DATA 3 PINS - TINY PACKAGE (SOT23) A E e D e1 B S A1 L H c Millimeters Inches Dim. Min. A A1 A2 b c D E E1 e e1 L L1 k 0.890 0.010 0.880 0.300 0.080 2.800 2.100 1.200 0.400 0° Typ. 0.950 2.900 1.300 0.950 1.900 0.500 0.540 Max. Min. 1.120 0.100 1.020 0.500 0.200 3.040 2.640 1.400 0.035 0.0004 0.600 0.016 Typ. 0.037 0.012 0.003 0.110 0.083 0.047 0.114 0.051 0.037 0.075 0.020 0.021 Max. 0.044 0.004 0.040 0.020 0.008 0.120 0.104 0.055 0.024 8° 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 - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom http://www.st.com 7/7