TS824-1.2 HIGH THERMAL STABILITY MICROPOWER SHUNT VOLTAGE REFERENCE ■ LOW Tc: 50 ppm/°C MAXIMUM ■ 1.225V OUTPUT VOLTAGE ■ LOW OPERATING CURRENT: 45µA max @ 25°C ■ HIGH PRECISION AT 25°C: ±1% ■ STABLE WHEN USED WITH CAPACITIVE LOADS ■ INDUSTRIAL TEMPERATURE RANGE: -40 to +85°C DESCRIPTION The TS824 is a low power shunt voltage reference featuring a very low temperature coefficient of 50ppm/°C as a maximum value. Providing 1.225V output voltage, the TS824 operates over the industrial temperature range (-40 to +85°C). Ideal for battery-powered equipments where power conservation is critical, the TS824 is housed in a tiny SOT23-3 package allowing space saving. The TS824 is typically stable with any capacitive loads within the entire temperature range. The product is thus easy to use and the design simplified. L SOT23-3L (Plastic Micropackage) PIN CONNECTIONS (top view) APPLICATION ■ ■ ■ ■ Instrumentation, Data acquisition systems, Portable, Battery powered equipments Power management ORDER CODE Voltage Precision SOT23-3 1.225V 1% TS824ILT-1.2 Single temperature range: -40 to +85°C SOT23 Marking L251 LT = Tiny Package (SOT23-3) - only available in Tape & Reel (LT) March 2002 1/5 TS824-1.2 ABSOLUTE MAXIMUM RATINGS Symbol Parameter IK Reverse Breakdown Current IF Forward Current PD Power Dissipation (note 1) TStd TJ Value Unit 20 mA 10 mA 360 mW Storage Temperature -65 to +150 °C Junction Temperature +150 °C TLead Lead Temperature (soldering, 10 seconds) +260 °C ESD Human Body Model (HBM) (note 2) Machine Model (MM) (note 2) 2 200 kV V SOT23-3 Note 1: The maximum power dissipation must be derated at high temperature. It can be calculated using TJMAX (maximum junction temperature), RTHJA (Thermal resistance junction to ambient) and T A (Ambient temperature). The maximum power dissipation formula at any temperature is P DMAX= (TJMAX - TA) / RTHJA. RTHJA is 340°C/W for the SOT23-3 package. Note 2: The Human Body Model (HBM) is defined as a 100pF capacitor discharge through a 1.5kΩ resistor into each pin. The Machine Mode (MM) is defined as a 200pF capacitor discharge directly into each pins. OPERATING CONDITIONS Symbol Value Unit Imin Minimum Operating Current Parameter 40 µA Imax Maximum Operating Current 12 mA Toper Operating Free Air Temperature Range -40 to +85 °C ELECTRICAL CHARACTERISTICS (note 3) Tamb = 25°C (unless otherwise specified) Symbol Parameter Reverse Breakdown Voltage VK IKMIN ∆VK /∆T ∆VK /∆IK Test Condition IK = 100µA I = 100µA Reverse Breakdown Voltage Tolerance K -40°C < Tamb < +85°C Minimum Operating Current Average Temperature Coefficient (note 4) Reverse Breakdown Voltage Change with Operating Current Range Tamb = 25°C Min. Typ. Max. Unit 1.213 1.225 1.237 V +12 +16 mV -12 -16 40 45 -40°C < Tamb < +85°C 50 IK = 100µA 50 IKMIN < IK < 1mA -40°C < Tamb < +85°C 0.3 1 1.5 1mA < IK < 12mA -40°C < Tamb < +85°C 2.5 8 10 ∆IK = IKMIN to 1mA -40°C < Tamb < +85°C 0.3 1 1.5 0.7 0.9 µA ppm/°C mV Ω RKA Static Impedance ∆IK = 1mA to 12mA -40°C < Tamb < +85°C 0.25 KVH Long Term Stability IK = 100µA, t = 1000hrs 120 ppm EN Wide Band Noise IK = 100µA 100Hz < f < 10kHz 200 nV/√Hz Note 3: Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design. Note 4: The total tolerance within the industrial range, where the maximum ∆T versus 25°C is 65°C, is explained hereafter: ± 1 % + (± 50 ppm/°C x 65°C) = ± 1.325 % 2/5 TS824-1.2 Reference voltage versus cathode current Reference voltage versus cathode current 1.5 Reference voltage (V) Reference voltage (V) 1.5 1.0 T = +25°C 0.5 0.0 1.0 T=+85°C 0.5 T=+25°C -0.5 T=-40°C -1.0 -10 0.0 -5 0 5 10 0 25 Cathode current (mA) 50 75 100 Cathode current (µA) Test circuit Reference voltage versus Temperature 1.240 1.235 IK=(VIN -VREF)/R VOUT =VREF VIN Cathode voltage (V) i=0 R 1.230 1.225 1.220 1.215 1.210 -40 -20 0 20 40 60 80 60 80 Temperature (°C) Static impedance for Ik > 1mA Static impedance for Ik > 1mA (Ω) Static impedance for Ik < 1mA (Ω) Static impedance for Ik < 1mA 1.5 1.0 0.5 0.0 -40 -20 0 20 40 Temperature (°C) 60 80 0.9 0.6 0.3 0.0 -40 -20 0 20 40 Temperature (°C) 3/5 TS824-1.2 Start-Up characteristics with low Ik (100µA) Start-Up schematic with low Ik (100µA) 4 18KΩ Input signal Voltage reference 0 0 5 10 15 20 Time (µs) Noise versus frequency 300 Noise (nV / √ Hz) T = +25°C 200 100 0 0.1 1 10 100 Frequency (kHz) 4/5 1000 10000 Output Pulse Generator 2 Intput Voltage (V) Ik=100µA TS824-1.2 PACKAGE MECHANICAL DATA 3 PINS - TINY PACKAGE (SOT23-3) D k GAUGE PLANE e L E E1 L1 0.25 b c C e1 0.10 SEATING PLANE A1 A A2 C Millimeters Inches Dimensions 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 - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States © http://www.st.com - United Kingdom 5/5