TS821_07

TS821 1.225V micropower shunt voltage reference Features ■ ■ ■ 1.225V typical output voltage Ultra low operating current: 45μA maximum at 25°C High precision @ 25°C – +/- 2% (standard version) – +/- 1% (A grade) – +/- 0.5% (B grade) High stability when used with capacitive loads Industrial temperature range: -40°C to +85°C 120ppm/°C maximum temperature coefficient Pin connections (Top view) L SOT23-3L (Plastic micropackage) ■ ■ ■ Applications ■ ■ ■ ■ ■ Computers Instrumentation Battery chargers Switch mode power supply Battery operated equipment Description The TS821 is a low power shunt voltage reference providing a stable 1.225V 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 TS821 is very stable and can be used in a broad range of application conditions. July 2007 Rev 2 1/9 www.st.com 9 Absolute maximum ratings and operating conditions TS821 1 Absolute maximum ratings and operating conditions Table 1. Symbol Ik If Pd Tstg ESD Machine model (MM) Tlead Absolute maximum ratings (AMR) Parameter Reverse breakdown current Forward current Power dissipation (1) Value 20 10 Unit mA mA mW °C kV V °C SOT23-3 360 -65 to +150 2 200 260 Storage temperature Human body model (HBM)(2) (3) Lead temperature (soldering, 10 seconds) 1. Pd is calculated with Tamb = 25°C and Tj = 150°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 Imin Imax Toper Operating conditions Parameter Minimum operating current Maximum operating current Operating free air temperature range Value 45 12 -40 to +85 Unit μA mA °C 2/9 TS821 Electrical characteristics 2 Table 3. Symbol Electrical characteristics TS821 (2% precision) Tamb = 25°C (1) (unless otherwise specified) Parameter Reverse breakdown voltage Vk Reverse breakdown voltage tolerance Minimum operating current Average temperature coefficient Test conditions Ik = 100μA Ik = 100μA -40°C < Tamb < +85°C Tamb = 25°C -40°C < Tamb < +85°C Ik = 100μA Ik-min < Ik < 1mA -40°C < Tamb < +85°C 1mA < Ik < 12mA -40°C < Tamb < +85°C ΔIk = 45µA to 1mA Ik = 100μA, t = 1000hrs Ik = 100μA, 10Hz < f < 10kHz 0.3 2.5 0.25 120 200 Min. Typ. Max. Unit V mV μA ppm/°C 1.200 1.225 1.250 -25 +34 40 +25 +34 45 50 120 0.7 1 Ik-min ΔVref/ΔT ΔVk/ΔIk Reverse breakdown voltage change with operating current range mV 8 10 0.5 Ω ppm nV/√ Hz Rka Kvh En Static impedance Long term stability Wide band noise 1. Limits are 100% production tested at 25°C. Behavior at the temperature range limits is guaranteed through correlation and by design. Table 4. Symbol TS821A (1% precision) Tamb = 25°C(1)(unless otherwise specified) Parameter Reverse breakdown voltage Test conditions Ik = 100μA Ik = 100μA -40°C < Tamb < +85°C Tamb = 25°C -40°C < Tamb < +85°C Average temperature coefficient Ik = 100μA Ik-min < Ik < 1mA -40°C < Tamb < +85°C 1mA < Ik < 12mA -40°C < Tamb < +85°C ΔIk = 45μA to 1mA Ik = 100μA, t = 1000hrs Ik = 100μA 10Hz < f < 10kHz 0.3 2.5 0.25 120 200 Min. Typ. Max. Unit V mV μA ppm/°C 1.213 1.225 1.237 -12 -22 40 +12 +22 45 50 120 0.7 1 Vk Reverse breakdown voltage tolerance Minimum operating current Ik-min ΔVref/ΔT ΔVk/ΔIk Reverse breakdown voltage change with operating current range mV 5 7 0.5 Ω ppm nV/√ Hz Rka Kvh En Static impedance Long term stability Wide band noise 1. Limits are 100% production tested at 25°C. Behavior at the temperature range limits is guaranteed through correlation and by design. 3/9 Electrical characteristics Table 5. Symbol TS821 TS821B (0.5% precision) Tamb = 25°C(1) (unless otherwise specified) Parameter Reverse breakdown voltage Test conditions Ik = 100μA Ik = 100μA -40°C < Tamb < +85°C Tamb = 25°C -40°C < Tamb < +85°C Average temperature coefficient Ik = 100μA Ik-min < Ik < 1mA -40°C < Tamb < +85°C 1mA < Ik < 12mA -40°C < Tamb < +85°C ΔIk = 45μA to 1mA Ik = 100μA, t = 1000hrs Ik = 100μA 10Hz < f < 10kHz 0.3 2.5 0.25 120 200 Min. Typ. Max. Unit V mV μA ppm/°C 1.219 1.225 1.231 -6 -16 40 +6 +16 45 50 120 0.7 1 Vk Reverse breakdown voltage tolerance Minimum operating current Ik-min ΔVref/ΔT ΔVk/ΔIk Reverse breakdown voltage change with operating current range mV 5 7 0.5 W ppm nV/√ Hz Rka Kvh En Static impedance Long term stability Wide band noise 1. Limits are 100% production tested at 25°C. Behavior at the temperature range limits is guaranteed through correlation and by design. 4/9 TS821 Electrical characteristics Figure 1. 12 8 4 0 -4 -8 Reference voltage versus cathode current Figure 2. Reference voltage versus cathode current 100 Cathode current (µA) Cathode current (mA) 50 0 -50 -1 -0.5 0 0.5 1 1.5 -1 -0.5 Reference voltage (V) 0 1 0.5 Reference voltage (V) 1.5 Figure 3. Test circuit Figure 4. 1.26 Reference voltage versus temperature +2% +1% +0.5% R Cathode voltage (V) 1.25 Ik=(Vin-Vref)/R Vout=Vref 1.24 1.23 1.22 1.21 1.2 1.19 -40 -20 0 20 40 60 80 Temperature (°C) -0.5% -1% -2% Figure 5. Static impedance versus temperature 0.25 Figure 6. 800 700 Noise voltage versus frequency Static impedance (Ohms) 0.24 0.23 0.22 0.21 0.2 -40 Noise voltage (nV/VHz) CL=10µF 600 500 400 300 200 CL=100µF CL=0µF 100 -20 0 20 40 60 80 0 0 1 10 100 1,000 10,000 Frequency (Hz) Temperature (°C) 5/9 Package information TS821 Figure 7. Pulse response for Ik=100µA Figure 8. Test circuit for pulse response at Ik=100µA 3V 18 KΩ Ik=100µA 0V Input 1.225V 0V Output 0 2 4 6 8 10 Time (µs) Figure 9. Pulse response for Ik=1mA Figure 10. Test circuit for pulse response at Ik=1mA 3V Input 1.8 KΩ Ik=1mA 0V 1.225V Output 0V 0 2 4 6 8 10 Time (µs) 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. 6/9 Output Intput Pulse Generator Output Intput Pulse Generator TS821 Figure 11. SOT23-3 package mechanical data Dimensions Ref. Min. A A1 A2 b C D E E1 e e1 L L1 k 0° 0.400 0.540 8° 0° 0.890 0.010 0.880 0.300 0.080 2.800 2.100 1.200 1.300 0.950 1.900 0.600 15.75 2.900 0.950 Millimeters Typ. Max. 1.120 0.100 1.020 0.500 0.200 3.040 2.64 1.400 Min. 35.05 0.39 34.65 11.81 3.15 110.26 82.70 47.26 Package information 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 7110469/A 7/9 Ordering information TS821 4 Ordering information Table 6. Order codes Precision 2% 1% 0.5% -40°C to +85°C SOT23-3 Tape & reel Temperature range Package Packing Marking L213 L212 L211 Part number TS821ILT TS821AILT TS821BILT 5 Revision history Table 7. Date 10-Nov-2005 24-Jul-2007 Document revision history Revision 1 2 Initial release. Removed information related to TO-92. Format update. Changes 8/9 TS821 Please Read Carefully: Information in this document is provided solely in connection with ST products. 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