TS822 2.5V micropower shunt voltage reference Features ■ 2.50V typical output voltage ■ Ultra low current consumption: 40µA typ. ■ High precision @ 25°C – ±2% (standard version) – ±1% (A grade) ■ High stability when used with capacitive loads ■ Industrial temperature range: -40°C to +85°C ■ 100ppm/°C maximum temperature coefficient L SOT23-3L (Plastic micropackage) Pin connections (Top view) Applications ■ Computers ■ Instrumentation ■ Battery chargers ■ Switch mode power supply ■ Battery operated equipment Description The TS822 is a low power shunt voltage reference providing a stable 2.5V output voltage over the industrial temperature range (-40°C to +85°C). Availabe in SOT23-3 surface mount package, it can be designed in applications where space saving is critical. The low operating current is a key advantage for power restricted designs. In addition, the TS822 is very stable and can be used in a broad range of application conditions. August 2007 Rev 2 1/9 www.st.com 9 Absolute maximum ratings and operating conditions 1 TS822 Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings Symbol Parameter Value Unit Ik Reverse breakdown current 20 mA If Forward current 10 mA 360 mW -65 to +150 °C 2 kV 200 V 260 °C (1) Pd Power dissipation Tstg Storage temperature Human body model SOT23-3 (HBM)(2) ESD Machine model (MM) Tlead (3) Lead temperature (soldering, 10 seconds) 1. Pd is calculated with Tamb = 25°C and Rthja = 340°C/W for the SOT23-3L package 2. Human body model: 100pF discharged through a 1.5kΩ resistor between two pins of the device, done for all couples of pin combinations with other pins floating. 3. Machine model: a 200pF cap is charged to the specified voltage, then discharged directly between two pins of the device with no external series resistor (internal resistor < 5Ω), done for all couples of pin combinations with other pins floating. Table 2. Symbol 2/9 Operating conditions Parameter Value Unit Ik-min Minimum operating current 50 μA Ik-max Maximum operating current 15 mA Toper Operating free air temperature range -40 to +85 °C TS822 Electrical characteristics 2 Electrical characteristics Table 3. TS822 (2% precision) Tamb = 25°C(1) (unless otherwise specified) Symbol Vk Parameter Test conditions Min. Typ. Max. Unit 2.5 2.55 V 50 66 mV Reverse breakdown voltage Ik = 100μA 2.45 Reverse breakdown voltage tolerance Ik = 100μA -40°C < Tamb < +85°C -50 -66 T = 25°C Ik-min 40 50 Minimum operating current -40°C < Tamb < +85°C ΔVref/ΔT Average temperature coefficient ΔVk/ΔIk Reverse breakdown voltage change with operating current range 60 Ik = 100μA 30 100 Ik-min < Ik < 1mA -40°C < Tamb < +85°C 0.4 1 1.2 1mA < Ik < 15mA -40°C < Tamb < +85°C 2.5 8 10 Ik = Ik-min to 1mA -40°C < Tamb < +85°C 0.4 1 1.2 Ik = 1 to 15mA -40°C < Tamb < +85°C 0.2 0.6 0.7 μA ppm/°C mV Ω Rka Reverse static impedance Kvh Long term stability Ik = 100μA, t = 1000hrs 120 ppm En Wide band noise Ik = 100μA, 10Hz < f < 10kHz 35 nV/√Hz 1. Limits are 100% production tested at 25°C. Behavior at temperature range limits is guaranteed by correlation and design. Table 4. Symbol Vk TS822A (1% precision) Tamb = 25°C(1) (unless otherwise specified) Parameter Test conditions Reverse breakdown voltage Ik = 100μA Reverse breakdown voltage tolerance Ik = 100μA -40°C < Tamb < +85°C T = 25°C Ik-min Min. Typ. Max. Unit 2.475 2.5 2.525 V 25 41 mV -25 -41 40 50 Minimum operating current -40°C < Tamb < +85°C ΔVref/ΔT Average temperature coefficient ΔVk/ΔIk Reverse breakdown voltage change with operating current range 60 Ik = 100μA 30 100 Ik-min < Ik < 1mA -40°C < Tamb < +85°C 0.4 1 1.2 μA ppm/°C mV 1mA < Ik < 15mA -40°C < Tamb < +85°C 2.5 8 10 Ik = Ik-min to 1mA -40°C < Tamb < +85°C 0.4 1 1.2 Ik = 1mA to 15mA -40°C < Tamb < +85°C 0.2 0.6 0.7 Ω Rka Reverse static impedance Kvh Long term stability Ik = 100μA, t = 1000hrs 120 ppm En Wide band noise Ik = 100μA, 10Hz < f < 10kHz 35 nV/√Hz 1. Limits are 100% production tested at 25°C. Behavior at temperature range limits is guaranteed by correlation and design. 3/9 Electrical characteristics Figure 1. TS822 Reference voltage versus cathode current Figure 2. Minimum operating current Reference voltage versus cathode current Minimum operating current 3 2.5 Cathode voltage (V) Cathode current (mA) 15 10 5 0 T=+25°C 2 T=+85°C 1.5 T=-40°C 1 0.5 0 -5 -0.5 0 0.5 1 1.5 2 0 2.5 20 Cathode voltage (V) Figure 3. 40 Cathode current (µA) Test circuit Figure 4. Reference voltage versus temperature Reference voltage versus Temperature Test circuit 2.56 Ik=(Vin-Vref)/R Vout=Vref Vin Cathode voltage (V) R +2% 2.54 +1% 2.52 2.5 2.48 -1% 2.46 -2% 2.44 -40 -20 0 20 40 60 80 Temperature (°C) Figure 5. Static impedance (Rka) versus temperature Figure 6. Noise voltage versus frequency Noise voltage versus Frequency Static impedance (Rka) versus temperature 1500 Noise voltage (nV/VHz) Static impedance (Ohms) 0.2 0.15 0.1 0.05 0 -40 CL=10µF 1000 CL=1µF 500 CL=100nF CL=0 0 -20 0 20 40 Temperature (°C) 4/9 CL=100µF 60 80 0.1 1000.0 10.0 1.0 100.0 Frequency (KHz) TS822 Electrical characteristics Figure 7. Test circuit for pulse response at Ik=100µA Pulse response for Ik=100µA Figure 8. Pulse response for Ik=100µA Test circuit for pulse response at Ik=100µA 5 25k ohm Ik=100µA Intput Pulse Generator Output Input 0 2.5 Output 0 0 5 10 15 20 Time (µs) Figure 9. Pulse response for Ik=100µA (detailed part) Figure 10. Pulse response for Ik=100µA (detailed part) Pulse response for Ik=100µA Detailed part Pulse response for Ik=100µA Detailed part 5V 5V Input Input 0V 2.5V 0V 2.5V Output Output 0V 0V 0 0.5 1 1.5 2 0 1 2 Time (µs) 3 4 5 Time (µs) Figure 11. Test circuit for pulse response at Ik=100mA Figure 12. Pulse response for Ik=100mA Pulse response for Ik=1mA Test circuit for pulse response at Ik=1mA 5V 2.5k ohm Input Output Pulse Generator Intput Ik=1mA 0V 2.5V Output 0V 0 1 2 3 4 5 Time (µs) 5/9 Package information TS822 Figure 13. Pulse response for Ik=100mA (detailed part) Figure 14. Pulse response for Ik=100mA (detailed part) Pulse response for Ik=1mA Detailed part Pulse response for Ik=1mA Detailed part 5V 5V Input Input 0V 2.5V 0V 2.5V Output Output 0V 0V 0 50 100 150 200 Time (ns) 3 0 0.2 0.4 0.6 Time (µs) 0.8 1 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. 6/9 TS822 Package information Figure 15. SOT23-3 package mechanical data Dimensions Ref. Millimeters Min. Typ. Mils Max. Min. Typ. Max. A 0.890 1.120 35.05 44.12 A1 0.010 0.100 0.39 3.94 A2 0.880 1.020 34.65 b 0.300 0.500 11.81 19.69 C 0.080 0.200 3.15 7.88 D 2.800 3.040 110.26 E 2.100 2.64 82.70 E1 1.200 1.400 47.26 0.950 2.900 1.300 37.41 114.17 51.19 0.950 37.41 e1 1.900 74.82 0.400 L1 k 0.600 15.75 0.540 0° 119.72 103.96 e L 40.17 55.13 23.63 21.27 8° 0° 8° 7110469/A 7/9 Ordering information 4 TS822 Ordering information Table 5. Order codes Part number Precision TS822ILT 2% TS822AILT 5 Package Packing -40°C to +85°C SOT23-3 Tape & reel Marking L223 1% L222 Revision history Table 6. 8/9 Temperature range Document revision history Date Revision Changes 21-Mar-2002 1 Initial release. 20-Aug-2007 2 Removed information related to TO-92 package. Format update. TS822 Please Read Carefully: Information in this document is provided solely in connection with ST products. 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