fully released specification ? andigilog, inc. 2006 www.andigilog.com april 2006 - 70a03207 l ow -v oltage u ltra -l ow -p ower t emperature s ensor with h igh o utput d rive ATS45C p roduct s pecification general description the ATS45C is a silicon integrated circuit temperature sensor. the ATS45C maintains an accuracy of 4c over a temperature range of ? 20c to 100c. at 25c (room temperature) the ac curacy is calibrated to typically better than 2c (v out = 250mv). this calibration is done during probe and guaranteed on each device. the ATS45C also maintains one of the lowest power consumption requirement in the industry and therefore reduces any inaccuracies due to self- heating. features ? calibrated 25c performance 3c ? low operating current: 25 a ? temperature range: -20c to 100c ? extremely linear output ramp: 10mv/c ? output ramp is calibrated to degrees celsius ? low self heating: 0.04c typical in still air ? operating voltage range: +2.7v to +5.5v ? optional single positive supply operation at reduced range: 10c to 100c ? non-linearity: 0.8 c ? 3-pin pb-free sot-23 package applications ? mobile communications terminals ? computers and peripherals ? battery management ? fax machines/printers/copiers ? portable medical instruments ? hvac ? power supply modules ? disk drives pin configuration actual part marking below accuracy vs. temperature ordering information part number package temperature range part marking how supplied ATS45Cs3 3-pin sot-23 -20 ? c to +100 ? c agyw 3000 units on t&r y ? year, w - week 2 1 3 sot- 23 3-lead gnd v out v dd 2 1 3 sot- 23 3-lead gnd v out v dd ATS45C 2 1 3 sot- 23 3-lead gnd v out v dd 2 1 3 sot- 23 3-lead gnd v out v dd ATS45C sot-23 3-pin package 10 temperature (c) accuracy (c) -3 -2 -1 0 1 2 3 upper spec limits 0 80 100 lower spec limits - - - 25 60 40 20 -20 4 -4 temperature (c) accuracy (c) -3 -2 -1 0 1 2 3 upper spec limits 0 80 100 lower spec limits - - - 25 60 40 20 -20 4 -4 negative bias required below 10c
- 2 - ? andigilog, inc. 2006 www.andigilog.com april 2006 - 70a03207 ATS45C absolute maximum ratings 1 notes: 1. absolute maximum ratings are limits beyond which operation may cause permanent damage to the device. these are stress ratings only; functional operations at or above these limits is not implied. 2. human body model: 100pf capacitor discharged through a 1.5k ? resistor into each pin. machine model: 200pf capacitor discharged directly into each pin. 3. esd classification per jesd22-a114c.01 for human body model and jesd22- a115 for machine model. 4. these specifications are guaranteed only for the test conditions listed. recommended operating ratings symbol parameter min max units v dd supply voltage +2.7 +5.5 v v out output voltage 0 v dd v t a operating temperature range -20 +100 c electrical characteristics 4 limits apply for - 20c t a +100c and v dd = + 3.0v unless otherwise noted. negative bi as required for temperatures below 10 c parameter symbol conditions min typ max units accuracy 5 t a =+25c t a =-20c (t min ) t a =+100c (t max ) -3 -4 -4 2 +3 +4 +4 c c c non-linearity 6 0.8 c supply current - output floating i dd t a =+25c - 20c t a +100c 6 11 25 a output sink capability 7 i ol +2.7v < v dd < +5.5v 1 a output source capability 7 i oh +2.7v < v dd < +5.5v 200 a average output slope (sensor gain) a out 10 mv/c room temp output voltage v out25 t a =+25c 250 mv minimum temperature single supply see fig 1 10 c self heating 8 sot-23 0.0414 c notes: 5. accuracy (expressed in c) = difference between calc ulated output voltage and measured output voltage. calculated output voltage = 10mv/c multiplied by devi ce?s case temperature at specified conditions of temperature, voltage and power supply. 6. non-linearity is defined as the deviation of the output-v oltage-versus-temperature curve from the best-fit straight line, over the device?s rated temperature range. 7. lowest output current should be targeted; higher curr ents result in more self -heating of the device. 8. max self heating = ja x (v dd x i dd ). assumes a capacitive load. parameter rating supply voltage +7v output voltage v dd + 0.5v continuous current, any terminal 10ma storage temperature range -60 c to +150 c human body model class 1b esd 2,3 machine model class a thermal re- sistance - ja sot-23 336c/w soldering (10 sec) 260c lead temp infrared (20 sec) 235c
- 3 - ? andigilog, inc. 2006 www.andigilog.com april 2006 - 70a03207 ATS45C figure 1. ATS45C output voltage vs temperature mounting the ATS45C can be easily mounted by gluing or cementing it to a surface. in this case, its temperature will be within about 0.04c of the temperature of the surface it is attached to if the ambient air temperature is almost the same as the surface temperature. if the air temperature is much higher or lower than the surface temperature, the ac tual temperature of the ATS45C die will be at an intermediate temperature between the surface temperature and the air temperature. to ensure good thermal conductivity, the backside of the ATS45C die is directly attached to the gnd pin. the lands and traces to the ATS45C will, of course, be part of the printed circuit board, which is the object whose temperature is being measured. these printed circuit board lands and traces will not cause the ATS45C?s temperature to deviate from the desired temperature. alternatively, the ATS45C can be mounted inside a sealed-end metal tube, and can then be dipped into a bath or screwed into a threaded hole in a tank. as with any ic, the ATS45C and accompanying wiring and circuits must be kept insulated and dry to avoid leakage and corrosion. this is especially true if the circuit may operate at cold temperatures where condensation can occur. printed-circuit coatings and varnishes such as humiseal and epoxy paint or dips can be used to ensure that moisture cannot corrode the ATS45C or its connections. v out +v dd (2.7v to 5.5v) ATS45C basic range temperature sensor +10.0 oc to +100 oc v out = +1000 mv at +100 oc v out = +250mv at +25 oc v out = +100mv at +10.0 oc v out ATS45C +v dd (2.7v to 5.5v) full range temperature sensor -20 oc to +100 oc v out = +1000 mv at +100 oc v out = +250mv at +25 oc v out = -200mv at -20 oc r external = v- / 10ua negative supply (v-) 25 50 75 100 -20 0 250 750 500 v out (mv) temperature (oc) 1000 temp (oc) = (v out ) / 10mv/oc output voltage vs temperature 25 50 75 100 10 250 750 500 v out (mv) temperature (oc) 1000 single supply with negative bias 0 -200 100 v out +v dd (2.7v to 5.5v) ATS45C basic range temperature sensor +10.0 oc to +100 oc v out = +1000 mv at +100 oc v out = +250mv at +25 oc v out = +100mv at +10.0 oc v out ATS45C +v dd (2.7v to 5.5v) full range temperature sensor -20 oc to +100 oc v out = +1000 mv at +100 oc v out = +250mv at +25 oc v out = -200mv at -20 oc r external = v- / 10ua negative supply (v-) 25 50 75 100 -20 0 250 750 500 v out (mv) temperature (oc) 1000 temp (oc) = (v out ) / 10mv/oc output voltage vs temperature 25 50 75 100 10 250 750 500 v out (mv) temperature (oc) 1000 single supply with negative bias 0 -200 100
- 4 - ? andigilog, inc. 2006 www.andigilog.com april 2006 - 70a03207 ATS45C typical performance characteristics i dd ( ma ) -50 -25 0 25 50 75 100 125 temperature (c) 6 8 10 12 v dd =+3v 0 2 4 14 16 18 20 22 i dd ( ma ) -50 -25 0 25 50 75 100 125 temperature (c) 6 8 10 12 v dd =+3v 0 2 4 14 16 18 20 22 i dd ( ma ) -50 -25 0 25 50 75 100 125 temperature (c) 6 8 10 12 v dd =+3v 0 2 4 14 16 18 20 22 i dd ( ma ) -50 -25 0 25 50 75 100 125 temperature (c) 6 8 10 12 v dd =+3v 0 2 4 14 16 18 20 22 figure 2. ATS45C current vs temperature typical applications figure 3. serial output temperature to digital converter in 10k 100k 1 f fb 1.00v ref 3.9k serial data out clock enable ATS45C 5v v temp u1 u2 u3 serial analog-to-digital converter adjustable shunt voltage reference + i dd (a)
- 5 - ? andigilog, inc. 2006 www.andigilog.com april 2006 - 70a03207 ATS45C figure 4. parallel output temperature to digital converter figure 5. thermostat / fan controller u1 r1 4.1v r3 v temp v out + ? r2 v+ r4 v+ 0.1 f + _ parallel data output intr cs rd 8 v temp parallel output analog-to-digital converter ATS45C u1 u3 u2
- 6 - ? andigilog, inc. 2006 www.andigilog.com april 2006 - 70a03207 ATS45C sot-23 package dimensions tape and reel data w 8.00 + 0.30 / -0.01 mm a 0 3.15 0.10 mm b 0 2.77 0.10 mm k 0 1.22 0.10 mm p 0 4.00 0.10 mm p 1 4.00 0.10 mm p 2 2.00 0.05 mm t 0.29 0.13 mm f 3.50 0.05 mm 0.370 mm (min) 0.510 mm (max) 1.200 mm (min) 1.400 mm (max) 2.100 mm (min) 2.640 mm (max) 0.450 mm (min) 0.600 mm (max) 2.800 mm (min) 3.040 mm (max) 0.890 mm (min) 1.120 mm (max) 0.013 mm (min) 0.100 mm (max) 1.780 mm (min) 2.050 mm (max) 0.55ref mm 0.085 mm (min) 0.180 mm (max)
andigilog, inc. 8380 s. kyrene rd., suite 101 tempe, arizona 85284 tel: (480) 940-6200 fax: (480) 940-4255 - 7 - ? andigilog, inc. 2006 www.andigilog.com april 2006 - 70a03207 ATS45C notes:
andigilog, inc. 8380 s. kyrene rd., suite 101 tempe, arizona 85284 tel: (480) 940-6200 fax: (480) 940-4255 - 8 - ? andigilog, inc. 2006 www.andigilog.com april 2006 - 70a03207 ATS45C data sheet classifications preliminary specification this classification is shown on the heading of each page of a specification for products that are either under development(design and qualification), or in the formative planning stages. andigilo g reserves the right to change or discontinue these products without notice. new release specification this classification is shown on the heading of the first pa ge only of a specification for products that are either under the later stages of development(characterization and qualification), or in the early weeks of release to production. andigilog reserves the right to change the specification and information for these products without notice. fully released specification fully released datasheets do not contain any classifica tion in the first page header. these documents contain specification on products that are in full production. andigilog will not change any guaranteed limits without written notice to the customers. obsolete datasheets that were written prior to january 1, 2001 without any header classification information should be considered as obsolete and non-active specifications, or in the best case as preliminary specifications.
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