TS432_08

TS432 1.24 V adjustable shunt voltage reference Features ■ ■ ■ 1.24 V typical output voltage Ultra low operating current: 60 µA maximum at 25° C High precision at 25° C: +/- 1% +/- 0.5% L SOT23-3L (Plastic micropackage) ■ ■ ■ High stability when used with capacitive loads Industrial temperature range: -40° C to +85° C 100 ppm/°C temperature coefficient Pin connections (top view) Applications ■ ■ ■ ■ ■ Computers Instrumentation Battery chargers Switch mode power supply Battery operated equipments K Cathode Ref Reference SOT23-3 A Anode Description The TS432 is an adjustable low power shunt voltage reference providing an output voltage from 1.24 V to 10 V over the industrial temperature range (-40° C to +85° C). Available in SOT23-3 surface mount package, it can be designed in applications where space saving is critical. The low operating current is also 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. April 2008 Rev 2 1/11 www.st.com 11 Absolute maximum ratings and operating conditions TS432 1 Absolute maximum ratings and operating conditions Table 1. Symbol VK IK Iref Pd Rthja Tlead Tstg Tj ESD MM: machine model 1. Pd is calculated with Tamb = 25° C, Tj = 150° C and Rthja = 360° C/W. Absolute maximum ratings (AMR) Parameter Cathode voltage Cathode current Reference input current Power dissipation (1) SOT23-3 Thermal resistance junction to ambient for SOT23-3 Lead temperature (soldering 10 seconds) Storage temperature Junction temperature HBM: human body model Value 12 -10 to +20 -0.05 to +3 340 360 250 -65 to +150 150 1.5 150 Unit V mA mA mW °C/W °C °C °C kV V Table 2. Symbol VK IK Tamb Operating conditions Parameter Cathode voltage Cathode current Ambient temperature Value 1.24 to 10 60µ to 12m -40 to +85 Unit V A °C 2/11 TS432 Electrical characteristics 2 Table 3. Symbol Electrical characteristics Tamb = 25°C (unless otherwise specified) Parameter Test conditions IK = 100µA, VK=VREF Vref Reference voltage TS432 (1%) TS432A (0.5%) ΔVref IKmin Reference voltage tolerance over temperature Minimum operating current IK = 100µA, VK=VREF Tamb = 25°C -40°C < Tamb < +85°C IKmin < IK < 1mA ΔVref Reverse breakdown voltage change with -40°C < Tamb < +85°C operating current range 1mA < IK < 12mA -40°C < Tamb < +85°C 0.7 1.228 1.234 7 40 Min. Typ. 1.24 1.252 1.246 16 60 65 1.5 2 mV 2 4 6 1.8 2.5 mV/V 3 50 100 nA 200 1 100 nA 150 0.25 120 200 0.5 W ppm nV/√ Hz mV μA V Max. Unit ΔVref/ΔVK Reference voltage change with output voltage change IK = 10mA, VK=10V to VREF -40°C < Tamb < +85°C IK=10mA, R1=10KΩ, R2=+ ∞ -40°C < Tamb < +85°C Iref Reference input current IOFF RKA KVH EN Off-state cathode current Static impedance Long term stability Wide band noise VREF=0, VK=10V -40°C < Tamb < +85°C ΔIK = 100µA to 12mA IK = 100µA, t = 1000hrs IK = 100µA 100Hz < F < 10kHz Note: Limits are 100% production tested at 25° C. Behavior over the temperature range is guaranteed through correlation and by design. 3/11 Electrical characteristics TS432 Figure 1. 1.252 1.248 1.244 1.240 Reference voltage vs temperature Figure 2. Test circuit for VK = Vref Reference Voltage (V) Input VK = VREF IK = 100µA Output Ik VK 1.236 1.232 1.228 -40 VREF 0 40 Temperature (°C) 80 120 Figure 3. 10 IK Cathode current (mA) Cathode voltage vs cathode current Figure 4. 1.5 VK Cathode voltage (V) Cathode voltage vs cathode current 5 VK = VREF TAMB = +25°C TAMB=-40°C 1.0 TAMB=+25°C TAMB=+85°C 0.5 TAMB=+125°C 0 -5 -10 -1.0 -0.5 0.0 0.5 1.0 1.5 0.0 0 20 40 60 VK Cathode voltage (V) IK Cathode current (µA) Figure 5. 100 Reference input current vs temperature Figure 6. 0.4 Static impedance vs temperature 80 IK = 10 mA R1 = 10 KΩ R2 = + ∞ RKA Static impedance (Ohms) IREF Reference current (nA) 0.3 VK = VREF IK = 100 µA to 12 mA 60 0.2 40 0.1 20 0 -40 0 40 Temperature (°C) 80 120 0.0 -40 0 40 Temperature (°C) 80 120 4/11 TS432 Electrical characteristics Figure 7. 150 IOFF Off-State current (nA) Off-state current vs temperature Figure 8. Test circuit for off-state current measurement Input 100 VREF = 0 V VK = 10 V VK =10V IOFF 50 0 -40 0 40 Temperature (°C) 80 120 Figure 9. Ratio of change in reference input voltage to change in VK voltage vs temperature Figure 10. Test circuit for VKA > VREF Ratio of change in Reference input voltage (mV/V) 3 Input VK IK 2 IK = 10 mA VK = 10V to VREF R1 IREF 1 R2 VREF 0 -40 0 40 Temperature (°C) 80 120 VK = VREF . (1+R1/R2) + IREF . R1 Figure 11. Phase and gain vs frequency 60 Gain TAMB = +25°C 180 Figure 12. Test circuit for phase and gain measurement 5V 40 Gain (dB) 120 23.5 kΩ Phase (Degree) 22 µF Phase 20 60 1 µF 33 kΩ Output 0 2 10 10 3 10 4 10 5 10 6 0 Input 33 kΩ Frequency (Hz) 5/11 Electrical characteristics TS432 Figure 13. Test circuit for pulse response at IK=100 µA Figure 14. Test circuit for pulse response at IK = 1 mA 3V V 18KΩ IK = 100µA 0V 3V 1.8KΩ IK=1mA Output Figure 15. Pulse response at IK = 100 µA Figure 16. Pulse response at IK = 1 mA Input and Output signals (Volt) Input and Ouput signals (Volt) 3 Input 3 Intput Input 2 IK = 1 mA TAMB = + 25°C 2 Output 1 IK = 100 µA TAMB = + 25°C 0 0 5 Time (µs) 1 Output 0 10 15 0 5 10 Time (µs) 15 20 Figure 17. Pulse response at IK = 100 µA Input and Output signals (Volt) Figure 18. Pulse response at IK = 1 mA Input and Output signals (Volt) 3 Input 2 3 Input 2 IK = 1 mA TAMB = + 25°C 1 Output IK = 100 µA TAMB = + 25°C 1 Output 0 -5 0 0 5 10 Time (µs) 15 20 0 5 10 Time (µs) 15 20 6/11 Output Pulse Generator f=10KHz Intput Pulse Generator f=10KHz TS432 Figure 19. Equivalent input noise vs frequency 300 TAMB = + 25°C Electrical characteristics Figure 20. Block diagram Cathode Noise (nV/√ Hz) 200 Vref + - 100 1.24V 0 2 10 10 3 10 4 10 5 10 6 10 7 Anode Frequency (Hz) 7/11 Package information TS432 3 Package information In order to meet environmental requirements, STMicroelectronics offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics trademark. ECOPACK specifications are available at: www.st.com. 8/11 TS432 Figure 21. SOT23-3 package mechanical drawing Package information 7110469/A Table 4. SOT23-3 package mechanical data Dimensions Ref. Min. A A1 A2 b C D E E1 e e1 L L1 k 0° 0.400 0.890 0.010 0.880 0.300 0.080 2.800 2.100 1.200 Millimeters Typ. Max. 1.120 0.100 0.950 1.020 0.500 0.200 2.900 3.040 2.64 1.300 0.950 1.900 0.600 0.540 8° 0° 15.75 1.400 Min. 35.05 0.39 34.65 11.81 3.15 110.26 82.70 47.26 Mils Typ. Max. 44.12 3.94 37.41 40.17 19.69 7.88 114.17 119.72 103.96 51.19 37.41 74.82 23.63 21.27 8° 55.13 9/11 Ordering information TS432 4 Ordering information Table 5. Precision 1% 0.5% Order codes Order code TS432ILT TS432AILT Temperature range -40° C to +85° C Package Packing Marking L235 SOT23-3 Tape & reel L236 5 Revision history Table 6. Date 16-Dec-2002 7-Apr-2008 Document revision history Revision 1 2 Initial release. Corrected package mechanical data. Updated document format. Changes 10/11 TS432 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. 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