august 2007 rev 2 1/9 9 ts822 2.5v micropower shunt voltage reference features 2.50v typical output voltage ultra low current cons umption: 40a typ. high precision @ 25c ? 2% (standard version) ? 1% (a grade) high stability when used with capacitive loads industrial temperature range: -40c to +85c 100ppm/c maximum temperature coefficient 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 (-40c to +85c). 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. l sot23-3l (plastic micropackage) pin connections (top view) www.st.com
absolute maximum ratings and operating conditions ts822 2/9 1 absolute maximum ratings and operating conditions table 1. absolute maximum ratings symbol parameter value unit i k reverse breakdown current 20 ma i f forward current 10 ma p d power dissipation (1) sot23-3 1. p d is calculated with t amb = 25c and r thja = 340c/w for the sot23-3l package 360 mw t stg storage temperature -65 to +150 c esd human body model (hbm) (2) 2. human body model: 100pf discharged through a 1.5k resistor between two pins of the device, done for all couples of pin combinati ons with other pins floating. 2kv machine model (mm) (3) 3. machine model: a 200pf cap is charged to the specif ied voltage, then discharged directly between two pins of the device with no external seri es resistor (inter nal resistor < 5 ), done for all couples of pin combinations with other pins floating. 200 v t lead lead temperature (soldering, 10 seconds) 260 c table 2. operating conditions symbol parameter value unit i k-min minimum operating current 50 a i k-max maximum operating current 15 ma t oper operating free air temperature range -40 to +85 c
ts822 electrical characteristics 3/9 2 electrical characteristics table 3. ts822 (2% precision) t amb = 25c (1) (unless otherwise specified) symbol parameter test conditions min. typ. max. unit v k reverse breakdown voltage i k = 100 a 2.45 2.5 2.55 v reverse breakdown voltage tolerance i k = 100 a -40c < t amb < +85c -50 -66 50 66 mv i k-min minimum operating current t = 25c 40 50 a -40c < t amb < +85c 60 v ref / t average temperature coefficient i k = 100 a 30 100 ppm/c v k / i k reverse breakdown voltage change with operating current range i k-min < i k < 1ma -40c < t amb < +85c 0.4 1 1.2 mv 1ma < i k < 15ma -40c < t amb < +85c 2.5 8 10 r ka reverse static impedance i k = i k-min to 1ma -40c < t amb < +85c 0.4 1 1.2 i k = 1 to 15ma -40c < t amb < +85c 0.2 0.6 0.7 k vh long term stability i k = 100 a, t = 1000hrs 120 ppm en wide band noise i k = 100 a, 10hz < f < 10khz 35 nv/ hz 1. limits are 100% production tested at 25 c. behavior at temperature range limi ts is guaranteed by correlation and design. table 4. ts822a (1% precision) t amb = 25c (1) (unless otherwise specified) symbol parameter test conditions min. typ. max. unit v k reverse breakdown voltage i k = 100 a 2.475 2.5 2.525 v reverse breakdown voltage tolerance i k = 100 a -40c < t amb < +85c -25 -41 25 41 mv i k-min minimum operating current t = 25c 40 50 a -40c < t amb < +85c 60 v ref / t average temperature coefficient i k = 100 a 30 100 ppm/c v k / ik reverse breakdown voltage change with operating current range i k-min < i k < 1ma -40c < t amb < +85c 0.4 1 1.2 mv 1ma < i k < 15ma -40c < t amb < +85c 2.5 8 10 r ka reverse static impedance i k = i k-min to 1ma -40c < t amb < +85c 0.4 1 1.2 i k = 1ma to 15ma -40c < t amb < +85c 0.2 0.6 0.7 k vh long term stability i k = 100 a, t = 1000hrs 120 ppm en wide band noise i k = 100 a, 10hz < f < 10khz 35 nv/ hz 1. limits are 100% production tested at 25 c. behavior at temperature range limi ts is guaranteed by correlation and design.
electrical characteristics ts822 4/9 figure 1. reference voltage versus cathode current figure 2. minimum operating current reference voltage versus cathode current -0.5 0 0.5 1 1.5 2 2.5 cathode voltage (v) -5 0 5 10 15 cathode current (ma) minimum operating current 02040 cathode current (a) 0 0.5 1 1.5 2 2.5 3 cathode voltage (v) t=+85c t=-40c t=+25c figure 3. test circuit figure 4. reference voltage versus temperature test circuit vin ik=(vin-vref)/r vout=vref r reference voltage versus temperature -40 -20 0 20 40 60 80 te m p erature ( c ) 2.44 2.46 2.48 2.5 2.52 2.54 2.56 cathode voltage (v) +2% -2% -1% +1% figure 5. static impedance (r ka ) versus temperature figure 6. noise voltage versus frequency static impedance (rka) versus temperature -40-20 0 20406080 temperature (c) 0 0.05 0.1 0.15 0.2 static impedance (ohms) noise voltage versus frequency 0.1 1.0 10.0 100.0 1000.0 frequency (khz) 0 500 1000 1500 noise voltage (nv/vhz) c l =10f c l =0 c l =100f c l =100nf c l =1f
ts822 electrical characteristics 5/9 figure 7. test circuit for pulse response at i k =100a figure 8. pulse response for i k =100a ik=100a output 25k ohm pulse generator intput test circuit for pulse response at ik=100a pulse response for ik=100a 0 5 0 2.5 0 5 10 15 20 time (s) input output figure 9. pulse response for i k =100a (detailed part) figure 10. pulse response for i k =100a (detailed part) pulse response for ik=100a detailed part 00.5 11.52 time (s) 0v 5v 2.5v 0v input output pulse response for ik=100a detailed part 012345 time (s) 0v 5v 0v 2.5v input output figure 11. test circuit for pulse response at i k =100ma figure 12. pulse response for i k =100ma ik=1ma output pulse generator intput test circuit for pulse response at ik=1ma 2.5k ohm pulse response for ik=1ma 0v 5v 0v 2.5v 012345 time (s) input output
package information ts822 6/9 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 . figure 13. pulse response for i k =100ma (detailed part) figure 14. pulse response for i k =100ma (detailed part) pulse response for ik=1ma detailed part 0v 5v 2.5v 0v 0 50 100 150 200 time (ns) input output pulse response for ik=1ma detailed part 0v 5v 0v 2.5v 0 0.2 0.4 0.6 0.8 1 time (s) input output
ts822 package information 7/9 figure 15. sot23-3 package mechanical data ref. dimensions millimeters mils min. typ. 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 0.950 1.020 34.65 37.41 40.17 b 0.300 0.500 11.81 19.69 c 0.080 0.200 3.15 7.88 d 2.800 2.900 3.040 110.26 114.17 119.72 e 2.100 2.64 82.70 103.96 e1 1.200 1.300 1.400 47.26 51.19 55.13 e 0.950 37.41 e1 1.900 74.82 l 0.400 0.600 15.75 23.63 l1 0.540 21.27 k0808 7110469/a
ordering information ts822 8/9 4 ordering information 5 revision history table 5. order codes part number precision temperature range package packing marking ts822ilt 2% -40c to +85c sot23-3 tape & reel l223 ts822ailt 1% l222 table 6. 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.
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