lm75bd.zip

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最新版温度传感器 LM75BD 规格书。
lm75bd.zip
  • lm75bd.pdf
    173KB
内容介绍
<html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8"> <meta name="generator" content="pdf2htmlEX"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <link rel="stylesheet" href="https://static.pudn.com/base/css/base.min.css"> <link rel="stylesheet" href="https://static.pudn.com/base/css/fancy.min.css"> <link rel="stylesheet" href="https://static.pudn.com/prod/directory_preview_static/62516c7874bc5c01059bbb94/raw.css"> <script src="https://static.pudn.com/base/js/compatibility.min.js"></script> <script src="https://static.pudn.com/base/js/pdf2htmlEX.min.js"></script> <script> try{ pdf2htmlEX.defaultViewer = new pdf2htmlEX.Viewer({}); }catch(e){} </script> <title></title> </head> <body> <div id="sidebar" style="display: none"> <div id="outline"> </div> </div> <div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/62516c7874bc5c01059bbb94/bg1.jpg"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">1.<span class="_ _0"> </span>General description</div><div class="t m0 x2 h3 y2 ff2 fs1 fc1 sc0 ls0 ws0">The LM75B is a temperature-to-digital con<span class="_ _1"></span>verter using an on-chip band<span class="_"> </span>gap temperature</div><div class="t m0 x2 h3 y3 ff2 fs1 fc1 sc0 ls0 ws0">sensor and Sigma-Delta A-to-D conv<span class="_ _1"></span>ersion technique with an o<span class="_ _1"></span>v<span class="_ _1"></span>er<span class="_ _2"></span>temperature detection</div><div class="t m0 x2 h3 y4 ff2 fs1 fc1 sc0 ls0 ws0">output. The LM75B contains a number of data registers: Con&#64257;guration register (Conf) to</div><div class="t m0 x2 h3 y5 ff2 fs1 fc1 sc0 ls0 ws0">store<span class="_"> </span>the<span class="_ _3"> </span>de<span class="_ _1"></span>vice<span class="_"> </span>settings<span class="_ _3"> </span>such<span class="_"> </span>as<span class="_ _3"> </span>de<span class="_ _1"></span>vice<span class="_"> </span>oper<span class="_ _1"></span>ation<span class="_ _3"> </span>mode,<span class="_"> </span>OS<span class="_ _3"> </span>operation<span class="_ _3"> </span>mode,<span class="_"> </span>OS<span class="_ _3"> </span>polarity</div><div class="t m0 x2 h3 y6 ff2 fs1 fc1 sc0 ls0 ws0">and OS f<span class="_ _1"></span>ault queue as described in<span class="_"> </span><span class="fc2">Section 7 &#8220;Functional descr<span class="_ _2"></span>iption&#8221;</span>; temperature</div><div class="t m0 x2 h3 y7 ff2 fs1 fc1 sc0 ls0 ws0">register<span class="_ _3"> </span>(T<span class="_ _4"></span>emp)<span class="_ _3"> </span>to<span class="_"> </span>store<span class="_ _3"> </span>the<span class="_ _3"> </span>digital<span class="_"> </span>temp<span class="_ _3"> </span>reading,<span class="_ _3"> </span>and<span class="_"> </span>set-point<span class="_ _3"> </span>registers<span class="_ _3"> </span>(T<span class="_ _4"></span>os<span class="_ _3"> </span>and<span class="_ _3"> </span>Thyst)<span class="_ _3"> </span>to</div><div class="t m0 x2 h3 y8 ff2 fs1 fc1 sc0 ls0 ws0">store programmab<span class="_ _1"></span>le o<span class="_ _1"></span>vertemperature shutdown and h<span class="_ _1"></span>ysteresis limits, that can be</div><div class="t m0 x2 h3 y9 ff2 fs1 fc1 sc0 ls0 ws0">communicated b<span class="_ _1"></span>y a controller via the 2-wire serial I</div><div class="t m0 x3 h4 ya ff2 fs2 fc1 sc0 ls0 ws0">2</div><div class="t m0 x4 h3 y9 ff2 fs1 fc1 sc0 ls0 ws0">C-bus interf<span class="_ _1"></span>ace<span class="_ _1"></span>. The de<span class="_ _1"></span>vice also</div><div class="t m0 x2 h3 yb ff2 fs1 fc1 sc0 ls0 ws0">includes<span class="_ _3"> </span>an<span class="_"> </span>open-drain<span class="_ _3"> </span>output<span class="_ _3"> </span>(OS)<span class="_"> </span>which<span class="_ _3"> </span>becomes<span class="_"> </span>activ<span class="_ _1"></span>e<span class="_ _3"> </span>when<span class="_ _3"> </span>the<span class="_"> </span>temperature<span class="_ _3"> </span>e<span class="_ _1"></span>xceeds</div><div class="t m0 x2 h3 yc ff2 fs1 fc1 sc0 ls0 ws0">the<span class="_ _3"> </span>programmed<span class="_ _3"> </span>limits.<span class="_ _3"> </span>There<span class="_ _3"> </span>are<span class="_ _3"> </span>three<span class="_"> </span>selectab<span class="_ _1"></span>le<span class="_ _3"> </span>logic<span class="_ _3"> </span>address<span class="_"> </span>pins<span class="_ _3"> </span>so<span class="_ _3"> </span>that<span class="_ _3"> </span>eight<span class="_ _3"> </span>devices</div><div class="t m0 x2 h3 yd ff2 fs1 fc1 sc0 ls0 ws0">can be connected on the same bus without address con&#64258;ict.</div><div class="t m0 x2 h3 ye ff2 fs1 fc1 sc0 ls0 ws0">The LM75B can be con&#64257;gured f<span class="_ _1"></span>or diff<span class="_ _1"></span>erent operation conditions<span class="_ _1"></span>. It can be set in nor<span class="_ _2"></span>mal</div><div class="t m0 x2 h3 yf ff2 fs1 fc1 sc0 ls0 ws0">mode to periodically monitor the ambient temperature, or in shutdown mode to minimiz<span class="_ _1"></span>e</div><div class="t m0 x2 h3 y10 ff2 fs1 fc1 sc0 ls0 ws0">pow<span class="_ _1"></span>er consumption. The OS output operates in either of two selectab<span class="_ _1"></span>le modes:</div><div class="t m0 x2 h3 y11 ff2 fs1 fc1 sc0 ls0 ws0">OS<span class="_"> </span>comparator mode or OS interrupt mode. Its activ<span class="_ _1"></span>e state can be selected as either</div><div class="t m0 x2 h3 y12 ff2 fs1 fc1 sc0 ls0 ws0">HIGH or LO<span class="_ _1"></span>W<span class="_ _4"></span>. The fault queue that de&#64257;nes the number of consecutiv<span class="_ _1"></span>e f<span class="_ _1"></span>aults in order to</div><div class="t m0 x2 h3 y13 ff2 fs1 fc1 sc0 ls0 ws0">activate the OS output is prog<span class="_ _1"></span>rammab<span class="_ _1"></span>le as well as the set-point limits<span class="_ _1"></span>.</div><div class="t m0 x2 h3 y14 ff2 fs1 fc1 sc0 ls0 ws0">The temperature register alw<span class="_ _1"></span>a<span class="_ _1"></span>ys stores an 11-bit 2's complement data giving a</div><div class="t m0 x2 h5 y15 ff2 fs1 fc1 sc0 ls0 ws0">temperature<span class="_"> </span>resolution<span class="_"> </span>of<span class="_"> </span>0.125<span class="_"> </span><span class="ff3">&#176;</span>C<span class="_ _1"></span>.<span class="_"> </span>This<span class="_ _3"> </span>high<span class="_"> </span>temperature<span class="_"> </span>resolution<span class="_"> </span>is<span class="_"> </span>par<span class="_ _2"></span>ticularly<span class="_"> </span>useful</div><div class="t m0 x2 h3 y16 ff2 fs1 fc1 sc0 ls0 ws0">in applications of measuring precisely the ther<span class="_ _2"></span>mal drift or r<span class="_ _2"></span>una<span class="_ _1"></span>wa<span class="_ _1"></span>y<span class="_ _4"></span>. When the LM75B is</div><div class="t m0 x2 h3 y17 ff2 fs1 fc1 sc0 ls0 ws0">accessed the conv<span class="_ _1"></span>ersion in process is not interrupted (i.e., the I</div><div class="t m0 x5 h4 y18 ff2 fs2 fc1 sc0 ls0 ws0">2</div><div class="t m0 x6 h3 y17 ff2 fs1 fc1 sc0 ls0 ws0">C-bus section is totally</div><div class="t m0 x2 h3 y19 ff2 fs1 fc1 sc0 ls0 ws0">independent of the Sigma-Delta conv<span class="_ _1"></span>er<span class="_ _2"></span>ter section) and accessing the LM75B</div><div class="t m0 x2 h3 y1a ff2 fs1 fc1 sc0 ls0 ws0">continuously without w<span class="_ _1"></span>aiting at least one conv<span class="_ _1"></span>ersion time between comm<span class="_ _1"></span>unications will</div><div class="t m0 x2 h3 y1b ff2 fs1 fc1 sc0 ls0 ws0">not pre<span class="_ _1"></span>v<span class="_ _1"></span>ent the de<span class="_ _1"></span>vice from updating the T<span class="_ _4"></span>emp register with a ne<span class="_ _1"></span>w conv<span class="_ _1"></span>ersion result. The</div><div class="t m0 x2 h3 y1c ff2 fs1 fc1 sc0 ls0 ws0">new con<span class="_ _1"></span>v<span class="_ _1"></span>ersion result will be a<span class="_ _1"></span>vailab<span class="_ _1"></span>le immediately after the T<span class="_ _5"></span>emp register is updated.</div><div class="t m0 x2 h3 y1d ff2 fs1 fc1 sc0 ls0 ws0">The LM75B pow<span class="_ _1"></span>ers up in the nor<span class="_ _2"></span>mal oper<span class="_ _1"></span>ation mode with the OS in comparator mode,</div><div class="t m0 x2 h5 y1e ff2 fs1 fc1 sc0 ls0 ws0">temperature threshold of 80<span class="_"> </span><span class="ff3">&#176;</span>C and h<span class="_ _1"></span>ysteresis of 75<span class="_"> </span><span class="ff3">&#176;</span>C<span class="_ _1"></span>, so that it can be used as a</div><div class="t m0 x2 h3 y1f ff2 fs1 fc1 sc0 ls0 ws0">stand-alone thermostat with those pre-de&#64257;ned temperature set points.</div><div class="t m0 x1 h2 y20 ff1 fs0 fc0 sc0 ls0 ws0">2.<span class="_ _0"> </span>Features</div><div class="t m0 x2 h3 y21 ff4 fs1 fc0 sc0 ls0 ws0">n<span class="_ _6"> </span><span class="ff2 fc1">Pin-f<span class="_ _1"></span>or-pin replacement f<span class="_ _1"></span>or industr<span class="_ _2"></span>y standard LM75 and LM75A and off<span class="_ _1"></span>ers impro<span class="_ _1"></span>v<span class="_ _1"></span>ed</span></div><div class="t m0 x7 h5 y22 ff2 fs1 fc1 sc0 ls0 ws0">temperature<span class="_ _3"> </span>resolution<span class="_ _3"> </span>of<span class="_ _3"> </span>0.125<span class="_"> </span><span class="ff3">&#176;</span>C<span class="_ _3"> </span>and<span class="_"> </span>speci&#64257;cation<span class="_ _3"> </span>of<span class="_ _3"> </span>a<span class="_ _3"> </span>single<span class="_ _3"> </span>par<span class="_ _2"></span>t<span class="_ _3"> </span>ov<span class="_ _1"></span>er<span class="_ _3"> </span>power<span class="_ _3"> </span>supply</div><div class="t m0 x7 h3 y23 ff2 fs1 fc1 sc0 ls0 ws0">range from 2.8<span class="_"> </span>V to 5.5<span class="_"> </span>V</div><div class="t m0 x2 h3 y24 ff4 fs1 fc0 sc0 ls0 ws0">n<span class="_ _6"> </span><span class="ff2 fc1">I</span></div><div class="t m0 x8 h4 y25 ff2 fs2 fc1 sc0 ls0 ws0">2</div><div class="t m0 x9 h3 y24 ff2 fs1 fc1 sc0 ls0 ws0">C-bus interf<span class="_ _1"></span>ace with up to 8 de<span class="_ _1"></span>vices on the same b<span class="_ _1"></span>us</div><div class="t m0 x2 h3 y26 ff4 fs1 fc0 sc0 ls0 ws0">n<span class="_ _6"> </span><span class="ff2 fc1">P<span class="_ _1"></span>o<span class="_ _1"></span>wer supply r<span class="_ _1"></span>ange from 2.8<span class="_"> </span>V to 5.5<span class="_"> </span>V</span></div><div class="t m0 x2 h5 y27 ff4 fs1 fc0 sc0 ls0 ws0">n<span class="_ _6"> </span><span class="ff2 fc1">T<span class="_ _5"></span>emperatures range from<span class="_"> </span><span class="ff3">&#8722;</span>55<span class="_"> </span><span class="ff3">&#176;</span>C to +125<span class="_"> </span><span class="ff3">&#176;</span>C</span></div><div class="t m0 xa h6 y28 ff1 fs3 fc0 sc0 ls0 ws0">LM75B</div><div class="t m0 xa h7 y29 ff1 fs4 fc0 sc0 ls0 ws0">Digital temperature sensor and thermal watchdog</div><div class="t m0 xa h8 y2a ff1 fs5 fc0 sc0 ls0 ws0">Rev<span class="_ _4"></span>. 02 &#8212; 9 December 2008<span class="_ _7"> </span>Product data sheet</div><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a></div><div class="pi" data-data='{"ctm":[1.611639,0.000000,0.000000,1.611639,0.000000,0.000000]}'></div></div> </body> </html>
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