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general description the MAX31725 temperature sensor accurately measures temperature and provides an overtemperature alarm/ interrupt/shutdown output. the device converts the temperature measurements to digital form using a high-resolution, sigma-delta, analog-to-digital converter (adc). accuracy is q 0.5 n c from -40 n c 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 2.5v to 3.7v supply voltage range, low 600 f a supply current, and a lockup- protected i 2 c-compatible interface make the sensor ideal for a wide range of applications, including pcs, electronic test equipment, and office electronics. the MAX31725 is available in an 8-pin tdfn package and operates over the -55 n c to +150 n c temperature range. applications servers networking telecom industrial benefits and features s 0.5 n c accuracy from -40 n c to +105 n c s 16-bit (0.00390625 n c) temperature resolution s selectable timeout prevents bus lockup (default enabled) 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 typical application circuit 19-6477; rev 0; 9/12 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 MAX31725 0.5c local temperature sensor for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxims website at www.maximintegrated.com.
MAX31725 0.5c local temperature sensor 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 = +70 n c) tdfn (derate 24.4mw/ n c above +70 n c) ............... 1951.2mw esd protection (all pins, human body model) (note 1) .... q 4000v operating temperature range ........................ -55 n c to +150 n c junction temperature ..................................................... +150 n c storage temperature range ............................ -65 n c to +150 n c lead temperature (soldering, 10s) ................................ +300 n c soldering temperature (reflow) ..................................... +260 n c 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 = +25 n c.) (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 www.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, -40 n c p t a p +105 n c -0.5 +0.5 n c 2.5v p + v dd p 3.7v, -55 n c p t a p +150 n c -0.7 +0.7 temperature conversion noise 0.0625 n c 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 = -40 n c to +125 n c 600 925 f a shutdown mode, i 2 c inactive, t a = -40 n c to +125 n c 2.5 3.5 i 2 c inactive, t a = +150 n c 800 shutdown mode, i 2 c inactive, t a = +150 n c 4.2 maxim integrated
MAX31725 0.5c local temperature sensor 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 = +25 n c.) (note 3) i 2 c ac 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 = +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 n c t hyst default temperature factory default setting 75 75 75 n c 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 f a input-low leakage current i il v in = 0v (all digital inputs ) 0.005 1 f a input capacitance all digital inputs 5 pf output-high leakage current v in = 3.3v (sda and os) 1 f a 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 f s start condition hold time t hd:sta 0.6 f s stop condition setup time t su:sto 90% of scl to 10% of sda 600 ns clock low period t low 1.3 f s clock high period t high 0.6 f s 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 f s 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 0.5c local temperature sensor 4 figure 1. i 2 c timing diagram note 3: limits are 100% production tested at t a = +25 n c and/or t a = +85 n c. 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 +150 n 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
5 typical operating characteristics (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 erro r -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 erro r -3 sigma error mean error MAX31725 0.5c local temperature sensor maxim integrated
MAX31725 0.5c local temperature sensor 6 pin description pin configuration pin name function 1 sda serial-data input/output line. open drain. connect sda to a pullup resistor. high impedance for supply voltages from 0 to 3.7v. 2 scl serial-data clock input. open drain. connect scl to a pullup resistor. high impedance for supply voltages from 0 to 3.7v. 3 os overtemperature shutdown output. open drain. connect os to a pullup resistor. 4 gnd ground 5 a2 i 2 c slave address input. connect a2 to gnd or v dd to set the desired i 2 c bus address. do not leave unconnected (table 1). 6 a1 i 2 c slave address input. connect a1 to gnd, v dd , sda, or scl to set the desired i 2 c bus address. do not leave unconnected (table 1). high impedance for supply voltages from 0 to 3.7v. 7 a0 i 2 c slave address input. connect a0 to gnd, v dd , sda, or scl to set the desired i 2 c bus address. do not leave unconnected (table 1). high impedance for supply voltages from 0 to 3.7v. 8 v dd positive supply voltage input. bypass to gnd with a 0.1 m f bypass capacitor. ep exposed pad (bottom side of package). connect ep to gnd. 13 4 + 86 5 v dd a1 a2 ep 2 7 a0 sda os gnd scl tdfn (3mm x 3mm) top view MAX31725 maxim integrated
MAX31725 0.5c local temperature sensor 7 block diagram i 2 c block digit al logic block data register block tempera ture 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 s temp 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 s t 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 s t 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 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 0 os polarity shutdown 2 voltage reference digital control one-shot bit shutdown bit MAX31725 comparator/ interrupt maxim integrated
MAX31725 0.5c local temperature sensor 8 detailed description the MAX31725 temperature sensor measures temperature and converts the data into digital form. an i 2 c-compatible two-wire serial interface allows access to conversion results. the device accepts standard i 2 c commands to read the data, set the overtemperature alarm (os) trip thresholds, and configure other characteristics. while reading the temperature register, any changes in temperature are ignored until the read is completed. the temperature register is updated for the new temperature measurement upon completion of the read operation. os output, t os and t hyst limits in comparator mode, the os output behaves like a thermostat ( figure 2 ). the output asserts when the temperature rises above the limit set in the t os register. the output deasserts when the temperature falls below the limit set in the t hyst register. in comparator mode, the os output can be used to turn on a cooling fan, initiate an emergency shutdown signal, or reduce system clock speed. in interrupt mode, exceeding t os also asserts os. os remains asserted until a read operation is performed on any of the registers. once os has asserted due to figure 2. os output temperature response diagram 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 0.5c local temperature sensor 9 crossing above t os and is then reset, it is asserted again only when the temperature drops below t hyst . the output then remains asserted until it is reset by a read. it is then asserted again if the temperature rises above t os , and so on. putting the MAX31725 into shutdown mode also resets os. i 2 c-compatible bus interface a standard i 2 c-compatible 2-wire serial interface reads temperature data from the temperature registers and reads and writes control bits and alarm threshold data to and from the alarm and configuration registers. the MAX31725 responds to its own i 2 c slave address, which is selected using the a0, a1, and a2 pins. a0 and a1 can be connected to the supply voltage, ground, sda, or scl. a2 can be connected to supply voltage or ground to provide up to 32 unique addresses. table 1 shows how the a0, a1, and a2 connections determine the slave address. table 1. slave address selection 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 maxim integrated
MAX31725 0.5c local temperature sensor 10 internal registers the device contains four registers, each of which consists of 2 bytes. the configuration register contains only 1 byte of actual data and, when read as a 2-byte register, repeats the same data for the second byte. during a 2-byte write to the configuration register the second byte written takes precedence. the devices pointer register selects between the four data registers shown in table 2 . during reads and writes the pointer register auto increments after every 2 data bytes, but does not wrap from address 03h - 00h. the pointer register must be written for each i 2 c transaction. all registers are read and write, except for the read-only temperature register. write to the configuration register by writing the slave address byte, the pointer register byte to value 01h, and a data byte. the t os and t hyst registers require the slave address byte, pointer register byte, and 2 data bytes. if only 1 data byte is written, it is saved in bits d[15:8] of the respective register. if more than 2 data bytes are written, the pointer register auto increments and if pointing to a valid address, additional data writes to the next address. see figure 3 . table 2. register functions and por state figure 3. i 2 c-compatible timing diagram (write) register name address (hex) por state por state (c) read/ write hex binary temperature 00 0000h 0000 0000 0000 0000 0 read-only configuration 01 00h 0000 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 0 0 00 0 0 d0 d1 d2 d3 d4 d5 d6 d7 d0 d1 d0 d1 d2 d3 d4 d5 d6 d7 d0 d1 d2 d3 d4 d5 d6 d7 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 0.5c local temperature sensor 11 table 3. temperature, t hyst , and t os register definition figure 4. i 2 c-compatible timing diagram (read) perform a read operation by issuing the slave address byte (write), pointer byte, repeat start, another slave address byte (read), and then reading the data byte. after 2 data bytes the pointer register auto increments and, if pointing to a valid address, additional data can be read. see figure 4 . temperature registers temperature data is stored in the temperature, t os set point, and t hyst set point registers. the temperature data format is 16 bits, twos complement, and the register is read out in 2 bytes: an upper byte and a lower byte. bits d[15:0] contains the temperature data, with the lsb representing 0.00390625 n c and the msb representing the sign bit; see table 3 . the msb is transmitted first. in addition to the normal twos complement temperature data format, the MAX31725 offers an optional extended data format that allows temperatures equal to or greater than +128 n c to be read. in the extended format, selected 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 32 n c 16 n c 8 n c 4 n c 2 n c 1 n c 0.5 n c 0.25 n c 0.125 n c 0.0625 n c 0.03125 n c 0.015625 n c 0.0078125 n c 0.00390625 n c 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 00 00 d3* d4* d5* d2* d1* d1 d0 1 99 repeat start by master stop cond by master no ack by master 11 9 1 9 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 d0 d1 d2 d3 d4 d5 d6 d7 0 0 0 0 01 d3* d4* d5* d2* d1* r/w 11 11 99 99 *see table 1 . maxim integrated
MAX31725 0.5c local temperature sensor 12 by bit 5 of the configuration register, the measured temperature is the value in the temperature register plus 64 n c, as shown in table 4 . configuration register the configuration register contains 8 bits of data and initiates single conversions (one-shot), enables bus timeout, controls shutdown, sets the fault queue, sets the data format, selects os polarity, and determines whether the os output functions in comparator or interrupt mode. see table 5 . shutdown set bit d0 to 1 to place the device in shutdown mode and reduce supply current to 3.5 f a or less. if bit d0 is set to 1 when a temperature conversion is taking place, the device completes the conversion and then shuts down. in interrupt mode, entering shutdown resets the os output. while in shutdown, the i 2 c interface remains active and all registers remain accessible to the master. setting d0 to 0 takes the device out of shutdown and starts a new conversion. the results of this conversion are available to read after the max conversion time. comparator /interrupt mode set bit d1, the comparator /interrupt bit to 0 to operate os in comparator mode. in comparator mode, os is asserted when the temperature rises above the t os value. os is deasserted when the temperature drops below the t hyst value. see figure 2 . set bit d1 to 1 to operate os in interrupt mode. in interrupt mode, exceeding t os also asserts os. os remains asserted until a read operation is performed on any of the registers. once os has asserted due to crossing above t os and is then reset, it is asserted again only when the temperature drops below t hyst . the output then remains asserted until it is reset by a read. it is then asserted again if the temperature rises above t os , and so on. putting the MAX31725 into shutdown mode also resets os. note that if the mode is changed while os is active, an os reset may be required before it begins to behave normally. os polarity set bit d2, the os polarity bit, to 0 to force the os output polarity to active low. set bit d2 to 1 to set the os output polarity to active high. os is an open-drain output table 4. temperature data output format table 5. configuration register definition 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 0.5c local temperature sensor 13 under all conditions and requires a pullup resistor to output a high voltage. see figure 2 . fault queue bits d4 and d3, the fault queue bits, determine the number of faults necessary to trigger an os condition. see table 6 . the number of faults set in the queue must occur consecutively to trip the os output. the fault queue prevents os false tripping in noisy environments. data format bit d5 selects the temperature data format for the temperature, t os , and t hyst registers. when d5 is 0 (normal format), the data format is twos complement with a range of -128 n c to +127.99609375 n c. set d5 to 1 for extended temperature format. in extended format, the measured temperature equals the twos complement value plus 64 n c, thereby extending the upper temperature data range to 191.99609375 n c and allowing temperatures as high as 150 n c to be measured. see table 4 . once set, the data format does not update until the completion of the following temperature conversion. after setting d5 to 1, new extended temperature data is guaranteed ready after a time equal to twice the max conversion time. timeout enable set d6 to 1 to disable bus timeout. set d6 to 0 to reset the i 2 c-compatible interface when sda is low for more than 50ms (nominal). one-shot the one-shot function helps to reduce average supply current when continuous conversions are not necessary. setting d7 to 1 while the device is in shutdown mode immediately begins a new temperature conversion. after the conversion has completed, the device returns to shutdown mode. d7 returns to 0 when the conversion completes. writing 1 to d7 has no effect when the device is not in shutdown. power-on reset value the configuration register always powers up to a known state, as indicated in table 2 . these default por values correspond to the following modes of operation: ? comparator mode ? os active low ? 1 fault, fault queue ? normal data format ? timeout enabled applications information the MAX31725 measures the temperature of its own die. the thermal path between the die and the outside world determines the accuracy of temperature measurements. external temperature is conducted to the die primar - ily through the leads and the exposed pad. because of this, the device most easily measures the pcb tempera - ture. for ambient temperature measurements, mount the device on a pcb (or a section of the pcb) that is at ambi - ent temperature. temperature errors due to self-heating of the device die are minimal due to the low supply current. digital noise issues the device features an integrated lowpass filter on the scl and sda digital lines to mitigate the effects of bus noise. although this filtering makes communication robust in noisy environments, good layout practices are always recommended. minimize noise coupling by keeping digital traces away from switching power supplies. ensure that digital lines containing high-speed data cross at right angles to the sda and scl lines. excessive noise coupling into the sda and scl lines on the device specifically noise with amplitude greater than 400mv p-p (typical hysteresis), overshoot greater than 300mv above +v dd , and undershoot more than 300mv below gnd can prevent successful serial communication. serial bus not-acknowledge is the most common symptom, causing unnecessary traffic on the bus. care must be taken to ensure proper termination within a system with long pcb traces or multiple slaves on the bus. resistance can be added in series with the sda and scl lines to further help filter noise and ringing. if it proves to be necessary, a 5k i resistor should be placed in series with the scl line, placed as close as possible to the scl pin. this 5k i resistor, with the 5pf to 10pf stray capacitance of the device provide a 6mhz to 12mhz lowpass filter, which is sufficient filtering in most cases. table 6. configuration register fault queue bits 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 0.5c local temperature sensor 14 package information for the latest package outline information and land patterns (foot - prints), go to www.maximintegrated.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. ordering information + denotes a lead(pb)-free/rohs-compliant package. * ep = exposed pad. part temp range timeout enabled at por pin- package MAX31725mta+ -55 n c to +150 n c yes 8 tdfn-ep* package type package code outline no. land pattern no. 8 tdfn-ep t833+2 21-0137 90-0059 maxim integrated
maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated 160 rio robles, san jose, ca 95134 usa 1-408-601-1000 15 ? 2012 maxim integrated products, inc. the maxim logo and maxim integrated are trademarks of maxim integrated products, inc. revision history revision number revision date description pages changed 0 9/12 initial release MAX31725 0.5c local temperature sensor

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