View MAX31726_7867122.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

max31725/MAX31726?????? ??//???? - ?/ ?(adc)????? - 40 c + 105 c? 0.5 c??i 2 c2??? i 2 c??????????? ????????? max31725????32?? MAX31726????16?? 1 reset ?2.5v3.7v ?600 a??Ci 2 c??? ?????pc? ?? 8tdfn? - 55 c + 150 c ?? ? s -40 c+105 c?0.5c s 16(0.00390625 c)??? s ???(max31725????? MAX31726?????) s 2.5v3.7v s 925 a (?) s ?os???/?? s reset (MAX31726) ? ? ?? ?? 19-6477; rev 1; 3/13 max31725/MAX31726 0.5c local temperature sensors general description the max31725/MAX31726 temperature sensors accurately measure temperature and provide an overtemperature alarm/interrupt/shutdown output. these devices convert the temperature measurements to digital form using a high-resolution, sigma-delta, analog-to- digital converter (adc). accuracy is q0.5n c from -40nc to +105 n c. communication is through an i 2 c-compatible 2-wire serial interface. the i 2 c serial interface accepts standard write byte, read byte, send byte, and receive byte commands to read the temperature data and configure the behavior of the open-drain overtemperature shutdown output. the max31725 features three address select lines with a total of 32 available addresses. the MAX31726 features two address select lines with a total of 16 available addresses and a reset input. the sensors have a 2.5v to 3.7v supply voltage range, low 600 f a supply current, and a lockup-protected i 2 c-compatible interface that make them ideal for a wide range of applications, including pcs, electronic test equipment, and office electronics. both devices are available in an 8-pin tdfn package and operate over the -55 n c to +150 n c temperature range. benefits and features s 0.5n c accuracy from -40 n c to +105nc s 16-bit (0.00390625 n c) temperature resolution s selectable timeout prevents bus lockup (default enabled for max31725; default disabled for MAX31726) s 2.5v to 3.7v supply voltage range s 925a (max) operating supply current s separate open-drain os output operates as interrupt or comparator/thermostat output s reset input (MAX31726) applications servers networking telecom industrial typical application circuits 19-6477; rev 1; 3/13 ordering information appears at end of data sheet. for related parts and recommended products to use with this part, refer to: www.maximintegrated.com/max31725.related max31725 v dd 0.1f +2.5v to +3.7v 4.7k a0 a1 a2 sda to i 2 c master scl os gnd MAX31726 v dd 0.1f +2.5v to +3.7v 4.7k a0 a1 reset sda to i 2 c master scl os gnd for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com. ??????? china.maximintegrated.com/max31725.related ??????????????? ?????maxim?10800 852 1249 ()10800 152 1249 () maxim?china.maximintegrated.com max31725/MAX31726 0.5c??
2 (all voltages relative to gnd.) voltage range on v dd , sda, scl, a0, a1 ............ -0.3v to +4v voltage range on a2, os ........................ -0.3v to (v dd + 0.3v) input current at any pin ................................................... +5ma package input current ................................................... +20ma continuous power dissipation (t a = +70nc) tdfn (derate 24.4mw/nc above +70nc) ............... 1951.2mw esd protection (all pins, human body model) (note 1) .... q 4000v operating temperature range ........................ -55nc to +150nc junction temperature ..................................................... +150nc storage temperature range ............................ -65nc to +150nc lead temperature (soldering, 10s) ................................ +300nc soldering temperature (reflow) ..................................... +260nc absolute maximum ratings stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional opera - tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. recommended operating conditions (t a = -55 n c to +150 n c, unless otherwise noted.) (notes 3, 4) electrical characteristics (v dd = 2.5v to 3.7v, t a = -55 n c to +150 n c, unless otherwise noted. typical values are v dd = 3.3v, t a = +25nc.) (note 3) note 1: human body model, 100pf discharged through a 1.5k i resistor. tdfn junction-to-ambient thermal resistance ( q ja ) .......... 41c/w junction-to-case thermal resistance ( q jc ) ................. 8c/w note 2: package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a four-layer board. for detailed information on package thermal considerations, refer to china.maximintegrated.com/thermal-tutorial. package thermal characteristics (note 2) parameter symbol conditions min typ max units operating supply voltage v dd 2.5 3.3 3.7 v input high voltage v ih v dd x 0.7 v input low voltage v il v dd x 0.3 v parameter symbol conditions min typ max units accuracy (note 5) 2.5v p + v dd p 3.7v, -40n c p t a p +105n c -0.5 +0.5 nc 2.5v p + v dd p 3.7v, -55n c p t a p +150n c -0.7 +0.7 temperature conversion noise 0.0625 nc temperature data resolution 16 16 bits conversion time 44 50 ms first conversion completed data ready after por 50 ms quiescent supply current i dd i 2 c inactive, t a = -40n c to +125n c 600 925 fa shutdown mode, i 2 c inactive, t a = -40n c to +125n c 2.5 3.5 i 2 c inactive, t a = +150n c 800 shutdown mode, i 2 c inactive, t a = +150n c 4.2 maxim integrated max31725/MAX31726 0.5c??
3 electrical characteristics ( continued) (v dd = 2.5v to 3.7v, t a = -55 n c to +150 n c, unless otherwise noted. typical values are v dd = 3.3v, t a = +25nc.) (note 3) i 2 c ac electrical characteristics (v dd = 2.5v to 3.7v, t a = -55 n c to +150n c, unless otherwise noted. typical values are v dd = 3.3v, t a = +25 n c.) (notes 3, 6) ( figure 1) parameter symbol conditions min typ max units os delay depends on fault queue setting 1 6 conversions t os default temperature factory default setting 80 80 80 nc t hyst default temperature factory default setting 75 75 75 nc por voltage threshold 2.26 v por hysteresis 130 mv input-high leakage current i ih v in = 3.3v (all digital inputs) 0.005 1 fa input-low leakage current i il v in = 0v (all digital inputs ) 0.005 1 fa input capacitance all digital inputs 5 pf output-high leakage current v in = 3.3v (sda and os) 1 fa os output saturation voltage i out = 4.0ma 0.8 v output low voltage i ol = 3ma (sda) 0.4 v parameter symbol conditions min typ max units serial clock frequency f scl (note 7) dc 400 khz bus free time between stop and start conditions t buf 1.3 fs start condition hold time t hd:sta 0.6 fs stop condition setup time t su:sto 90% of scl to 10% of sda 600 ns clock low period t low 1.3 fs clock high period t high 0.6 fs start condition setup time t su:sta 90% of scl to 90% of sda 100 ns data setup time t su:dat 10% of sda to 10% of scl 100 ns data out hold time t dh (note 8) 100 ns data in hold time t hd:dat 10% of scl to 10% of sda (note 8) 0 0.9 fs maximum receive scl/sda rise time t r (note 9) 300 ns minimum receive scl/sda rise time t r (note 9) 20 + 0.1c b ns maximum receive scl/sda fall time t f (note 9) 300 ns minimum receive scl/sda fall time t f (note 9) 20 + 0.1c b ns transmit sda fall time t f (note 9) 20 + 0.1c b 250 ns maxim integrated max31725/MAX31726 0.5c??
4 ?1. i 2 c?? note 3: limits are 100% production tested at t a = +25nc and/or t a = +85nc. limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization. typical values are not guaranteed. note 4: all voltages are referenced to ground. currents entering the ic are specified positive. note 5: these limits represent a 3-sigma distribution. note 6: all timing specifications are guaranteed by design. note 7: holding the sda line low for a time greater than t timeout causes the devices to reset sda to the idle state of the serial bus communication (sda released). note 8: a master device must provide a hold time of at least 300ns for the sda signal to bridge the undefined region of scls fall - ing edge. note 9: c b = total capacitance of one bus line in pf. tested with c b = 400pf. note 10: input filters on sda and scl suppress noise spikes less than 50ns. i 2 c ac electrical characteristics ( continued) (v dd = 2.5v to 3.7v, t a = -55 n c to +150n c, unless otherwise noted. typical values are v dd = 3.3v, t a = +25 n c.) (notes 3, 6) ( figure 1) parameter symbol conditions min typ max units pulse width of suppressed spike t sp (note 10) 0 50 ns sda time low for reset of serial interface t timeout (note 7) 45 50 55 ms scl note: timing is referenced to v il(max) and v ih(min) . sda stop start repeated start t buf t hd:sta t hd:dat t su:dat t su:sto t hd:sta t sp t su:sta t high t r t f t low maxim integrated max31725/MAX31726 0.5c??
5 ? (t a = +25c, unless otherwise noted.) static quiescent supply current vs. temperature max31725 toc01 temperature (c) i dd (a) 130 80 30 -20 300 600 900 1200 1500 0 -70 3.7v dd 3.3v dd 2.5v dd static quiescent supply current vs. temperature (shutdown mode) max31725 toc02 temperature (c) i dd (a) 130 80 30 -20 2 4 6 8 10 0 -70 3.3v dd 3.7v dd 2.5v dd accuracy vs. temperature (v dd = 2.5v) max31725 toc03 temperature (c) error (c) 95 70 45 20 -5 -30 -0.5 0 0.5 1.0 -1.0 -55 120 +3 sigma error -3 sigma error mean error accuracy vs. temperature (v dd = 3.3v) max31725 toc04 temperature (c) error (c) 145 120 95 70 45 20 -5 -30 -0.8 0 0.8 1.5 -1.5 -55 170 +3 sigma error -3 sigma error mean error maxim integrated max31725/MAX31726 0.5c??
6 ? max31725 MAX31726 1 1 sda /???sdak03.7v?? 2 2 scl ?????sclk03.7v?? 3 3 os ?????os 4 4 gnd ? 5 - a2 i 2 c???a2gndv dd ?i 2 c????(1) - 5 reset ??? reset?????i 2 c? ???? 6 6 a1 i 2 c???a1gndv dd sdascl?i 2 c????( 1)03.7v?? 7 7 a0 i 2 c???a0gndv dd sdascl?i 2 c????( 1)03.7v?? 8 v dd v dd ???0.1fgnd ep ?(??)epgnd 13 4 + 86 5 v dd a1 a2 ep 2 7 a0 sda os gnd scl tdfn (3mm x 3mm) top view max31725 ( ) MAX31726 only. maxim integrated max31725/MAX31726 0.5c??
7 ? max31725/MAX31726 0.5c local temperature sensors 7 maxim integrated block diagram i 2 c block digital logic block data register block temperature core block por block 0 msb lsb data pointer serial logic sda scl address decoder 0 0 0 0 0 d1 d0 d1 d0 0 0 stemp config msb lsb ms byte msb lsb 3 msb lsb ls byte 2 6 2 5 2 4 2 3 2 2 2 1 2 0 2 -1 2 -2 2 -3 2 -4 2 -5 2 -6 2 -7 2 -8 st hyst msb temperature sensor 16-bit ? adc lsb ms byte msb lsb ls byte 2 6 2 5 2 4 2 3 2 2 2 1 2 0 2 -1 2 -2 2 -3 2 -4 2 -5 2 -6 2 -7 2 -8 st os 2 6 2 5 2 4 2 3 2 2 2 1 2 0 2 -1 2 -2 2 -3 2 -4 2 -5 2 -6 2 -7 2 -8 t os register digital comparator 0 1 1 0 1 1 a0 a1 v dd gnd v dd a2 (reset) temp register t hyst register thermostat logic fault queue bits compare/ interrupt bit os polarity bit os n os activate one shot timeout data format fault queue [1] fault queue [2] os polarity shutdown 2 voltage reference digital control one-shot bit shutdown bit max31725 MAX31726 ( ) MAX31726 only. comparator/ interrupt maxim integrated max31725/MAX31726 0.5c??
8 ?? max31725/MAX31726????? ??i 2 c?2???? ???i 2 c????? (os)??????? ??????? ??????? ost os t hyst ? ???os???( ?2 )? t os ????? t hyst ???? ??os??? ?????? ????t os ??os? ???,os???? ?t os os??? ?t hyst o??? ?????? t os ??os? max31725MAX31726??????os ? ?2. os?? t os t hyst inactive active inactive active read operation read operation read operation temperature os output (comparator mode) os set active low os output (interrupt mode) os set active low maxim integrated max31725/MAX31726 0.5c??
9 i 2 c?? ??i 2 c2???????? ?????/ ??i 2 c??max31725??a0 a1a2?MAX31726??a0a1?a0 a1???sdascla2 ????max31725?32??? MAX31726?16?? 1a?1b ??a0a1a2????? 1a. max31725??? 1b. MAX31726??? a2 connection a1 connection a0 connection slave address byte (hex) gnd gnd gnd 90h gnd gnd v dd 92h gnd gnd scl 82h gnd gnd sda 80h gnd v dd gnd 94h gnd v dd v dd 96h gnd v dd scl 86h gnd v dd sda 84h gnd scl gnd b4h gnd scl v dd b6h gnd scl scl a6h gnd scl sda a4h gnd sda gnd b0h gnd sda v dd b2h gnd sda scl a2h gnd sda sda a0h v dd gnd gnd 98h v dd gnd v dd 9ah v dd gnd scl 8ah v dd gnd sda 88h v dd v dd gnd 9ch v dd v dd v dd 9eh v dd v dd scl 8eh v dd v dd sda 8ch v dd scl gnd bch v dd scl v dd beh v dd scl scl aeh v dd scl sda ach v dd sda gnd b8h v dd sda v dd bah v dd sda scl aah v dd sda sda a8h a1 connection a0 connection slave address byte (hex) gnd gnd 98h gnd v dd 9ah gnd scl 8ah gnd sda 88h v dd gnd 9ch v dd v dd 9eh v dd scl 8eh v dd sda 8ch scl gnd bch scl v dd beh scl scl aeh scl sda ach sda gnd b8h sda v dd bah sda scl aah sda sda a8h maxim integrated max31725/MAX31726 0.5c??
10 ?? ????2? ?1?????2???? ???????2? ???????? ?? 2 ?/??? ?2???03h?00h ?i 2 c?????? ??? ????????01h?? ?t os t hyst ??? ???????2???1 ?????d[15:8] ??2???? ???????3 2. ??por?? ?3. i 2 c??() register name address (hex) por state por state (c) read/ write hex binary temperature 00 0000h 0000 0000 0000 0000 0 read-only configuration max31725 01 00h 0000 0000 r/w configuration MAX31726 01 40h 0100 0000 r/w t hyst 02 4b00h 0100 1011 0000 0000 75 r/w t os 03 5000h 0101 0000 0000 0000 80 r/w address byte address byte (a) configuration register write. (b) t os and t hyst write. pointer byte pointer byte most significant data byte least significant data byte configuration byte ack by max31725 ack by max31725 ack by max31725 ack by max31725 ack by max31725 start by master start by master ack by max31725 ack by max31725 stop cond by master stop cond by master d1 d0 10 d3*d4*d5* d2* d1* r/w 00 00 00 d0d1d2d3d4d5d6d7 d0d1 d0d1 d2d3d4d5d6d7 d0d1d2d3d4d5d6d7 10 00 00 00 d3*d4*d5* d2* d1* r/w 11 11 99 99 11 1 99 9 *see table 1. maxim integrated max31725/MAX31726 0.5c??
11 3. ??t hyst t os ? ?4. i 2 c?() ?????()????start ????()????? ?2??????? ????4 ??? ?????t os ?t hyst ? ?????16??2??? ???????d[15:0]? ?lsb 0.00390625 cmsb?? 3 msb? ??????max31725 MAX31726??????? + 128 c????5?? ?????????64 c 4? upper byte lower byte d15 d14 d13 d12 d11 d10 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 s msb 64 n c 32nc 16nc 8nc 4nc 2nc 1nc 0.5nc 0.25nc 0.125nc 0.0625nc 0.03125nc 0.015625nc 0.0078125nc 0.00390625nc 2 6 2 5 2 4 2 3 2 2 2 1 2 0 2 -1 2 -2 2 -3 2 -4 2 -5 2 -6 2 -7 2 -8 address byte address byte (b) typical pointer set followed by immediate read for 2-byte register such as temperature, t os , and t hyst . pointer byte most significant data byte least significant data byte ack by max31725 ack by max31725 ack by master ack by max31725 start by master 1 10 00 0000 d3*d4*d5* d2* d1* d1 d0 1 99 repeat start by master stop cond by master no ack by master 11 9 19 9 r/w 10 d3*d4* d7 d6 d5 d4 d3 d2 d1 d0 d7 d6 d5 d4 d3 d2 d1 d0 d5* d2* d1* r/w address byte (a) typical pointer set followed by immediate read from configuration register. pointer byte address byte data byte ack by max31725 ack by max31725 start by master repeat start by master no ack by master stop cond by master ack by max31725 10 d3*d4*d5* d2* d1* r/w 0 0d 1d 0 d0d1d2d3d4d5d6d7 0000 01 d3*d4*d5* d2* d1* r/w 11 11 99 99 *see table 1. maxim integrated max31725/MAX31726 0.5c??
12 ? ?8??(one - shot) ????????? ?os??os??(?)? 5 ? d01???????3.5 a ?????d01 ?????????os ??i 2 c???? d00???????? ??????? ?/?? d1(comparator /interrupt)0?os ????????t os ?os??t hyst ?os ?2 d11?os?????? t os ??os? ??os???????t os os????? t hyst ???os ?????t os ? ??max31725MAX31726 ??????os??os? ???os os d2(os polarity)0??os? ?d21?os??? os???? ???2 ? d4d3??os???? 6 ??? os????? os 4. ?? 5. ? temperature (c) normal format extended format binary hex binary hex +150 0111 1111 1111 1111 7fffh 0101 0110 0000 0000 5600h +128 0111 1111 1111 1111 7fffh 0100 0000 0000 0000 4000h +127 0111 1111 0000 0000 7f00h 0011 1111 0000 0000 3f00h +125 0111 1101 0000 0000 7d00h 0011 1101 0000 0000 3d00h +64 0100 0000 0000 0000 4000h 0000 0000 0000 0000 0000h +25 0001 1001 0000 0000 1900h 1101 1001 0000 0000 d900h +0.5 0000 0000 1000 0000 0080h 1100 0000 1000 0000 c080h 0 0000 0000 0000 0000 0000h 1100 0000 0000 0000 c000h -0.5 1111 1111 1000 0000 ff80h 1011 1111 1000 0000 bf80h -25 1110 0111 0000 0000 e700h 1010 0111 0000 0000 a700h -55 1100 1001 0000 0000 c900h 1000 1001 0000 0000 8900h d7 d6 d5 d4 d3 d2 d1 d0 one-shot timeout data format fault queue [1] fault queue [0] os polarity comparator/ interrupt shutdown maxim integrated max31725/MAX31726 0.5c??
13 ?? d5????t os t hyst ??? ?d5?0?(?)????? ? - 128 c + 127.99609375 c d51??????????? ??64 c??? 191.99609375 c?150 c?? 4 ???????d5 1????????? ????? timeout ? d61????? d60?sda?????50ms (?) i 2 c??? ? ???one - shot?? ?????d71?? ???????d70 ?????d71?? ?y? ??????? 2 ?? por??1?? ? ??? ? os ??? ? 1 ?? ? ?? ? max31725 ????MAX31726 ??? reset(MAX31726) MAX31726 reset ??i 2 c? ??pro???? reset ???? ??? ?? max31725MAX31726?? ???????? ?????pcb?? ???????? pcb (??pcb)???? ?? sclsda???? ?????? ???????? ????????? ??????sdascl?? ??sdascl??? 400mv p - p (?)+v dd 300mv? ?gnd 30 0mv3????? ??????? pcb???? ???sdascl? ?^??5k scl scl??5k 5pf - 10pf ????6mhz12mhz???? ?? 6. ?? fault queue [1] bit d4 fault queue [0] bit d3 number of faults 0 0 1 (por state) 0 1 2 1 0 4 1 1 6 maxim integrated max31725/MAX31726 0.5c??
14 ? +??(pb)/rohs??? *ep = ?? ?? ?????(?)? china. maximintegrated.com/packages ???? + # - ?rohs?????????????rohs???? part temp range reset timeout enabled at por pin-package max31725mta+ -55nc+150nc no yes 8 tdfn-ep* MAX31726mta+ -55nc+150nc yes yes 8 tdfn-ep* ? ? ?? 8 tdfn-ep t833+2 21-0137 90-0059 maxim integrated max31725/MAX31726 0.5c??
?? maximmaxim????????maxim??????????? ???(??)?????? maxim integrated 160 rio robles, san jose, ca 95134 usa 1-408-601-10 00 15 ? 2013 maxim integrated maxim?maxim integratedmaxim integrated products, inc.? maxim 8328 100083 ?800 810 0310 010-6211 5199 010-6211 5299 ? ? ? ?? 0 9/12 1 3/13 MAX31726 ? max31725/MAX31726 0.5c??

▲Up To Search▲

Price & Availability of MAX31726

	To Download MAX31726 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .