new release specification ? andigilog, inc. 2003 www.andigilog.com 70a03203-003 l ow -v oltage sot-23 t emperature s ensor with h igh o utput d rive ATS51 p roduct s pecification general description the ATS51 is a high-precision cmos temperature sensor that provides a cost-effective solution for applications requiring high-accuracy low-power temperature monitoring. the ATS51 is ideally suited for applications requiring high drive current. the ATS51 output voltage ramp is extremely linear and has a slope of 10mv/c. with a supply voltage of 2.7v to 6v, the ATS51 is accurate to 1c over a temperature range of ? 40c to 125c and has a typical room temperature accuracy of 0.5c. reducing the supply voltage to 2.7v does not change the negative and positive temperature extremes. as well, the ATS51 does not require external calibration. calibration of each device is performed at the factory. features ? precision calibrated to 1c at 25c ? low output impedance for 1ma load ? temperature range: -40c to 125c ? extremely linear output ramp: 10mv/c ? output ramp is calibrated to degrees celsius ? low operating current: 130 a ? low self heating: 0.2c typical in still air ? operating voltage range: +2.7v to +6v ? uses a single positive supply ? non-linearity: 0.8 c applications ? mobile phones ? mobile communications terminals ? computers ? battery management ? fax machines/printers/copiers ? portable medical instruments ? hvac ? power supply modules ? disk drives ? automotive control circuits pin configuration 2 1 3 sot- 23 3-lead gnd v out v dd 2 1 3 sot- 23 3-lead gnd v out v dd ATS51 2 1 3 sot- 23 3-lead gnd v out v dd 2 1 3 sot- 23 3-lead gnd v out v dd ATS51 actual part marking below accuracy vs temperature -50 0 50 100 temperature (c) accuracy (c) v dd =+5v lower spec limit -4 -3 -2 -1 0 1 2 3 upper spec limit -40 25 125 4 -50 0 50 100 temperature (c) accuracy (c) v dd =+5v lower spec limit -4 -3 -2 -1 0 1 2 3 upper spec limit -40 25 125 4 ordering information part number package temperature range part marking how supplied ATS51s3 3-pin sot-23 -40 ?c to +125 ? c abyw 3000 units on t&r y ? year, w - week
- 2 - ? andigilog, inc. 2003 www.andigilog.com 70a03203-004 ATS51 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 operation 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. these specifications ar e guaranteed only for the test conditions listed. recommended operating ratings symbol parameter min max units v dd supply voltage +2.7 +6 v v out output voltage 0 v dd v t a operating temperatur e range -40 +125 c electrical characteristics 3 limits apply for - 40c t a +125c and v dd = + 5.0v unless otherwise noted. parameter symbol conditions min typ max units accuracy 4 t a =+25c t a =-40c (t min ) t a =+125c (t max ) -1 -3 -3 0.5 1 1 +1 +3 +3 c c c non-linearity 5 0.8 c supply current ? output floating i dd t a =+25c 130 a output sink capability 6 i ol +2.7v < v dd < +6v 1 ma output source capability 6 i oh +2.7v < v dd < +6v 1 ma average output slope (sensor gain) a out 10 mv/c room temperature output voltage v out25 t a =+25c 750 mv self heating 7 sot-23 0.21840 c notes: 4. accuracy (expressed in c) = difference between calculated 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. 5. non-linearity is defined as the dev iation of the output-voltage-versus-temperature curve from the best-fit straight line, over the device?s rated temperature range. 6. lowest output current should be targeted; higher currents result in more self-heating of the device. 7. 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 15ma storage temperature range -60c to +150c human body model 2000v esd 2 machine model 250v thermal resistance - ja 336c/w vapor phase (60 sec) 215c lead temp infrared (15 sec) 220c
- 3 - ? andigilog, inc. 2003 www.andigilog.com 70a03203-004 ATS51 25 50 75 100 125 -25 -50 -40 0 1750 100 750 500 v out (mv) temperature (oc) 1500 temp (oc) = (v out ? 500mv) / 10mv/oc 25 50 75 100 125 -25 -50 -40 0 1750 100 750 500 v out (mv) temperature (oc) 1500 25 50 75 100 125 -25 -50 -40 0 25 50 75 100 125 -25 -50 -40 0 1750 100 750 500 v out (mv) temperature (oc) 1500 temp (oc) = (v out ? 500mv) / 10mv/oc figure 1. ATS51 output voltage vs. temperature mounting the ATS51 can be easily mounted by gluing or cementing it to a surface. in this case, its temperature will be within about 0.2c 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 ATS51 die will be at an intermediate temperature between the surface temperature and the air temperature. to ensure good thermal conductivity, the backside of the ATS51 die is directly attached to the gnd pin. the lands and traces to the ATS51 will, of course, be part of the printed circuit board, which is the object whose temperature is being measur ed. these printed circuit board lands and traces will not cause the ATS51?s temperature to deviate from the desired temperature. alternatively, the ATS51 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 ATS51 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. pr inted-circuit coatings and varnishes such as humiseal and epoxy paint or dips can be used to ensure that moisture cannot corrode the ATS51 or its connections. note: when taking advantage of the high current drive capability of the ATS51 while driving resistive loads, it is necessary to apply the appropriate thermal mounting techniques as described above. failure to do so will result in a loss of accuracy due to increased self heating.
- 4 - ? andigilog, inc. 2003 www.andigilog.com 70a03203-004 ATS51 typical performance characteristics -50 0 50 100 temperature (c) accuracy (c) v dd =+5v lower spec limit -4 -3 -2 -1 0 1 2 3 upper spec limit -40 25 125 4 -50 0 50 100 temperature (c) accuracy (c) v dd =+5v lower spec limit -4 -3 -2 -1 0 1 2 3 upper spec limit -40 25 125 4 figure 2. ATS51 accuracy range vs temperature 90 110 120 130 i dd ( ma) -50 -25 0 25 50 75 100 125 -50 -25 0 25 50 75 100 125 temperature (c) v dd = +5v 60 70 80 50 40 30 20 10 0 100 i 90 110 120 130 dd ( ma) -50 -25 0 25 50 75 100 125 -50 -25 0 25 50 75 100 125 temperature (c) v dd = +5v 100 60 70 80 50 40 30 20 10 0 figure 3. ATS51 current vs temperature i dd (a)
- 5 - ? andigilog, inc. 2003 www.andigilog.com 70a03203-004 ATS51 typical applications in 10k 100k 1 f fb 1.75v ref 3.9k serial data out clock enable ATS51 5v v temp u1 u2 u3 serial analog-to-digital converter adjustable shunt voltage reference + figure 4. serial output temperature to digital converter (full scale = +125 ?c) 5v wr 5k 30k in v ref 1.75v 15k 1 f + _ parallel data output intr cs rd 8 v temp parallel output analog-to-digital converter ATS51 u1 u3 u2 figure 5. parallel output temperature to digital converter (full scale = +125 ?c)
- 6 - ? andigilog, inc. 2003 www.andigilog.com 70a03203-004 ATS51 typical applications (cont.) figure 6. thermostat/fan controller u1 r1 4.1v r3 v temp v out + ? r2 v+ r4 v+ 0.1 f v t u2 u3 ATS51 shunt voltage reference
- 7 - ? andigilog, inc. 2003 www.andigilog.com 70a03203-004 ATS51 sot-23 package dimensions tape and reel data w 8.00 + 0.30 / -0.10 mm a 0 3.15 0.10 mm b 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. 7404 w. detroit st., suite 100 chandler, arizona 85226-2422 tel: (480) 940-6200 fax: (480) 940-4255 - 8 - ? andigilog, inc. 2003 www.andigilog.com 70a03203-004 ATS51 data sheet classifications preliminary specification this classification is shown on the heading of each page of a specification for produc ts that are either under development(design and qualification), or in the formative planning stages. andigilog reserves the right to change or discontinue these products without notice. new release specification this classification is shown on the heading of the first page 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 chang e 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 datasheet s that were written prior to january 1, 2001 without any header classification information should be consid ered as obsolete and non-active specifications, or in the best case as preliminary specifications.
andigilog, inc. 7404 w. detroit st., suite 100 chandler, arizona 85226-2422 tel: (480) 940-6200 fax: (480) 940-4255 - 9 - ? andigilog, inc. 2003 www.andigilog.com 70a03203-004 ATS51 notes:
|
