DS2438.rar

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this data is very usefull... i hope soo
DS2438.rar
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<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/622b818615da9b288b989923/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/622b818615da9b288b989923/bg1.jpg"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0"> <span class="_ _0"> </span>1 of 29<span class="_ _1"></span> <span class="_ _2"> </span> <span class="_ _3"> </span>070605 </div><div class="t m0 x2 h2 y2 ff1 fs0 fc0 sc0 ls1 ws1"> </div><div class="t m0 x2 h2 y3 ff1 fs0 fc0 sc0 ls1 ws1"> </div><div class="t m0 x2 h2 y4 ff1 fs0 fc0 sc0 ls1 ws1"> </div><div class="t m0 x2 h2 y5 ff1 fs0 fc0 sc0 ls1 ws1"> </div><div class="t m0 x2 h2 y6 ff1 fs0 fc0 sc0 ls1 ws1"><span class="fc3 sc0"> </span></div><div class="t m0 x2 h2 y7 ff1 fs0 fc0 sc0 ls1 ws1"> </div><div class="t m0 x2 h2 y8 ff1 fs0 fc0 sc0 ls1 ws1"> </div><div class="t m0 x2 h3 y9 ff1 fs1 fc0 sc0 ls1 ws1"> </div><div class="t m0 x1 h4 ya ff2 fs2 fc0 sc0 ls2 ws1">FEATURES<span class="fc1 ls1"> </span></div><div class="t m0 x1 h3 yb ff3 fs1 fc0 sc0 ls1 ws1">&#167; <span class="_ _4"> </span><span class="ff1 ls3 ws2">Unique 1-Wire</span></div><div class="t m0 x3 h5 yc ff1 fs3 fc0 sc0 ls1 ws1">&#174;</div><div class="t m0 x4 h3 yb ff4 fs1 fc0 sc0 ls1 ws1"> <span class="ff1 ls4 ws3">interface requir<span class="_ _4"></span>e<span class="_ _1"></span>s only one </span></div><div class="t m0 x5 h3 yd ff1 fs1 fc0 sc0 ls5 ws4">port pin for communication </div><div class="t m0 x1 h3 ye ff3 fs1 fc0 sc0 ls1 ws1">&#167; <span class="_ _4"> </span><span class="ff1 ls5 ws4">Provides unique 64-bit serial number </span></div><div class="t m0 x1 h3 yf ff3 fs1 fc0 sc0 ls1 ws1">&#167; <span class="_ _4"> </span><span class="ff1 ls6 ws5">Eliminates thermistor<span class="_ _1"></span>s by<span class="_ _1"></span> sensing battery </span></div><div class="t m0 x5 h3 y10 ff1 fs1 fc0 sc0 ls7 ws6">temperatur<span class="_ _4"></span>e on-chip </div><div class="t m0 x1 h3 y11 ff3 fs1 fc0 sc0 ls1 ws1">&#167; <span class="_ _4"> </span><span class="ff1 ls8 ws7">On-board A/D converter allows monitoring<span class="_ _1"></span> </span></div><div class="t m0 x5 h3 y12 ff1 fs1 fc0 sc0 ls9 ws8">of battery voltage for end-of-ch<span class="_ _4"></span>arge and end-</div><div class="t m0 x5 h3 y13 ff1 fs1 fc0 sc0 lsa ws9">of-discharge de<span class="_ _1"></span>termination </div><div class="t m0 x1 h3 y14 ff3 fs1 fc0 sc0 ls1 ws1">&#167; <span class="_ _4"> </span><span class="ff1 ls7 ws6">On-board integrat<span class="_ _4"></span>ed current accumulat<span class="_ _4"></span>or </span></div><div class="t m0 x5 h3 y15 ff1 fs1 fc0 sc0 lsb wsa">facilitate<span class="_ _1"></span>s fuel gauging<span class="_ _1"></span> </div><div class="t m0 x1 h3 y16 ff3 fs1 fc0 sc0 ls1 ws1">&#167; <span class="_ _4"> </span><span class="ff1 lsc wsb">Elapsed time mete<span class="_ _1"></span>r in binary format </span></div><div class="t m0 x1 h3 y17 ff3 fs1 fc0 sc0 ls1 ws1">&#167; <span class="_ _4"> </span><span class="ff1 ls4 ws3">40-byte nonvolatile user<span class="lsd wsc"> memory available </span></span></div><div class="t m0 x5 h3 y18 ff1 fs1 fc0 sc0 lse wsd">for storage of batter<span class="_ _4"></span>y<span class="_ _1"></span>-specific data </div><div class="t m0 x1 h3 y19 ff3 fs1 fc0 sc0 ls1 ws1">&#167; <span class="_ _4"> </span><span class="ff1 lsf wse">Reverts to low-power <span class="ls10 wsf">sleep mode on batter<span class="_ _4"></span>y<span class="_ _1"></span> </span></span></div><div class="t m0 x5 h3 y1a ff1 fs1 fc0 sc0 ls11 ws10">pack disconnect (feature <span class="_ _4"></span>disabled on </div><div class="t m0 x5 h3 y1b ff1 fs1 fc0 sc0 ls10 ws1">DS2438AZ) </div><div class="t m0 x1 h3 y1c ff3 fs1 fc0 sc0 ls1 ws1">&#167; <span class="_ _4"> </span><span class="ff1 ls12 ws11">Operating range -40&#186;C to +85&#186;C </span></div><div class="t m0 x1 h3 y1d ff3 fs1 fc0 sc0 ls1 ws1">&#167; <span class="_ _4"> </span><span class="ff1 ls4 ws3">Applications include portable computers, </span></div><div class="t m0 x5 h3 y1e ff1 fs1 fc0 sc0 ls13 ws12">portable/cellular phones, consumer </div><div class="t m0 x5 h3 y1f ff1 fs1 fc0 sc0 lsd wsc">electronics, and handhe<span class="ls14 ws13">ld instrumentation </span></div><div class="t m0 x6 h4 ya ff2 fs2 fc0 sc0 ls15 ws14">PIN A<span class="_ _1"></span>SSIGN<span class="_ _1"></span>MENT<span class="ff1 fs1 ls1 ws1"> </span></div><div class="t m0 x7 h6 y20 ff1 fs4 fc0 sc0 ls1 ws1"> </div><div class="t m0 x6 h4 y21 ff2 fs2 fc0 sc0 ls16 ws15">PIN DESCRIPTION </div><div class="t m0 x6 h3 y22 ff1 fs1 fc0 sc0 ls17 ws16">DQ - <span class="_ _5"></span>Data <span class="_ _6"></span>In/Out </div><div class="t m0 x6 h3 y23 ff1 fs1 fc0 sc0 ls11 ws10">VAD <span class="_ _7"> </span>- <span class="_ _8"> </span>General A/D input </div><div class="t m0 x6 h3 y24 ff1 fs1 fc0 sc0 ls1 ws1">V</div><div class="t m0 x8 h5 y25 ff1 fs3 fc0 sc0 ls18 ws1">SENS+</div><div class="t m0 x9 h3 y24 ff1 fs1 fc0 sc0 ls13 ws12"> <span class="_ _9"> </span>- <span class="_ _8"> </span>Battery current monitor input (+) </div><div class="t m0 x6 h3 y26 ff1 fs1 fc0 sc0 ls1 ws1">V</div><div class="t m0 x8 h5 y27 ff1 fs3 fc0 sc0 ls18 ws1">SENS-</div><div class="t m0 xa h3 y26 ff1 fs1 fc0 sc0 ls13 ws12"> <span class="_ _a"> </span>- <span class="_ _8"> </span>Battery current monitor input (-) </div><div class="t m0 x6 h3 y28 ff1 fs1 fc0 sc0 ls11 ws10">VDD <span class="_ _7"> </span>- <span class="_ _8"> </span>Power Supply (2.4V to 10.0V) </div><div class="t m0 x6 h3 y29 ff1 fs1 fc0 sc0 ls19 ws17">GND - <span class="_ _b"></span> <span class="_ _c"></span>Ground </div><div class="t m0 x6 h3 y2a ff1 fs1 fc0 sc0 ls3 ws2">NC <span class="_ _d"> </span>- <span class="_ _8"> </span>No connect </div><div class="t m0 x6 h7 y2b ff1 fs2 fc0 sc0 ls1 ws1"> </div><div class="t m0 x1 h4 y2c ff2 fs2 fc0 sc0 ls1 ws1"> </div><div class="t m0 x1 h4 y2d ff2 fs2 fc0 sc0 ls1a ws18">DESCRIPTION <span class="_ _4"></span> </div><div class="t m0 x1 h3 y2e ff1 fs1 fc0 sc0 ls5 ws19">The DS2438 Smart Battery Monitor provides several fun<span class="_ _4"></span>c<span class="_ _1"></span><span class="ls1b ws1a">tions that are desirable to <span class="_ _4"></span>carry in a battery </span></div><div class="t m0 x1 h3 y2f ff1 fs1 fc0 sc0 ls1c ws1b">pack: a mea<span class="_ _1"></span>ns of tagging<span class="_ _1"></span> a battery pack with a uni<span class="ls1b ws1c">que serial number, a dire<span class="ls1d ws1d">ct-to-digita<span class="_ _1"></span>l temperature<span class="_ _1"></span> </span></span></div><div class="t m0 x1 h3 y30 ff1 fs1 fc0 sc0 ls4 ws1e">sensor which eliminates the need for thermistors in <span class="ls1b ws1f">the battery pack, an A/D converte<span class="_ _4"></span>r which measures </span></div><div class="t m0 x1 h3 y31 ff1 fs1 fc0 sc0 lsd ws20">the battery voltage and current, an integrated curre<span class="ls13 ws21">nt accumulator whic<span class="_ _4"></span>h keeps a running<span class="_ _1"></span> total of all </span></div><div class="t m0 x1 h3 y32 ff1 fs1 fc0 sc0 ls13 ws22">current going into and o<span class="_ _4"></span>ut of the battery, an el<span class="lsd ws23">apsed time meter, <span class="_ _4"></span>and 40 by<span class="ls1e ws24">tes of nonvolatile EEPROM </span></span></div><div class="t m0 x1 h3 y33 ff1 fs1 fc0 sc0 lsd ws25">memory for storage of important paramet<span class="_ _4"></span>ers such <span class="ls1f ws26">as batter<span class="_ _4"></span>y<span class="_ _1"></span> chemistr<span class="_ _4"></span>y<span class="_ _1"></span>, batter<span class="_ _4"></span>y<span class="_ _1"></span> capacit<span class="_ _4"></span>y<span class="_ _1"></span>, char<span class="_ _4"></span>g<span class="_ _1"></span>ing </span></div><div class="t m0 x1 h3 y34 ff1 fs1 fc0 sc0 ls12 ws27">methodology and assembly date. <span class="_ _4"></span>I<span class="_ _1"></span>nformation is sent<span class="ls13 ws28"> to/from the <span class="_ _4"></span>DS2438 over a 1-Wire interfa<span class="_ _4"></span>ce, so that </span></div><div class="t m0 x1 h3 y35 ff1 fs1 fc0 sc0 ls11 ws29">only one wire (and <span class="_ _4"></span>g<span class="_ _1"></span>round) needs to be<span class="_ _4"></span> connected<span class="ls1b ws1a"> from a central<span class="_ _4"></span> microprocessor to a DS2438. <span class="_ _4"></span> This </span></div><div class="t m0 x1 h3 y36 ff1 fs1 fc0 sc0 ls11 ws2a">means that batter<span class="_ _4"></span>y<span class="_ _1"></span> packs need onl<span class="_ _4"></span>y<span class="_ _1"></span> have three ou<span class="_ _4"></span>tput connectors: battery power, ground, and<span class="_ _4"></span> the 1-Wire </div><div class="t m0 x1 h3 y37 ff1 fs1 fc0 sc0 ls20 ws1">interfa<span class="_ _1"></span>ce. </div><div class="t m0 x1 h2 y38 ff1 fs0 fc0 sc0 ls1 ws1"> </div><div class="t m0 x1 h3 y39 ff1 fs1 fc0 sc0 ls8 ws2b">Because each DS2438 c<span class="_ _4"></span>ontains a uni<span class="ls1 ws2c">que silicon serial number, multiple<span class="ls12 ws2d"> DS2438s can ex<span class="_ _4"></span>ist on the same </span></span></div><div class="t m0 x1 h3 y3a ff1 fs1 fc0 sc0 lsc wsb">1-Wire bus. This allows multiple<span class="_ _1"></span> battery<span class="_ _1"></span> packs to be<span class="_ _1"></span> charged or used in the sy<span class="_ _1"></span>stem simultane<span class="_ _1"></span>ously. </div><div class="t m0 x1 h2 y3b ff1 fs0 fc0 sc0 ls1 ws1"> </div><div class="t m0 x1 h3 y3c ff1 fs1 fc0 sc0 lsf ws2e">Applications for the smart battery monitor include <span class="lsd ws2f">portable computers, cellula<span class="ls11 ws2a">r telephones, and handheld </span></span></div><div class="t m0 x1 h3 y3d ff1 fs1 fc0 sc0 ls21 ws30">instrumentation ba<span class="_ _1"></span>ttery<span class="_ _1"></span> packs in which it is cr<span class="_ _1"></span>itical to monitor rea<span class="_ _1"></span>l-time battery<span class="_ _1"></span> performa<span class="_ _1"></span>nce. Used in </div><div class="t m0 x1 h3 y3e ff1 fs1 fc0 sc0 ls5 ws31">conjunction with a microcontroller in the host syst<span class="ls8 ws32">em, the DS2438 provides a complete smart batter<span class="_ _4"></span>y<span class="_ _1"></span> </span></div><div class="t m0 x1 h3 y3f ff1 fs1 fc0 sc0 ls22 ws33">pack solution that is fully<span class="_ _1"></span> chemistry<span class="_ _1"></span>-independent. <span class="ls23 ws34">The customiza<span class="_ _1"></span>tion for a pa<span class="_ _1"></span>rticular battery<span class="_ _1"></span> chemistry<span class="_ _1"></span> </span></div><div class="t m0 x1 h3 y40 ff1 fs1 fc0 sc0 ls4 ws35">and capacity is realized in the code programme<span class="ls12 ws36">d into the microcontroller and DS2438 EEPROM, and<span class="_ _1"></span> </span></div><div class="t m0 x1 h3 y41 ff1 fs1 fc0 sc0 ls4 ws3">only a software revision is necessar<span class="_ _4"></span>y<span class="_ _1"></span> should a desi<span class="ls8 ws37">gner wish to change battery pack ch<span class="_ _4"></span>emistry<span class="_ _1"></span>. </span></div><div class="t m0 xb h8 y42 ff2 fs5 fc0 sc0 ls24 ws1">DS2438</div><div class="t m0 xc h8 y43 ff2 fs5 fc0 sc0 ls25 ws38">Smart Battery Monito</div><div class="c xc y44 w2 h9"><div class="t m0 xd h8 y45 ff2 fs5 fc0 sc0 ls1 ws1">r</div></div><div class="t m0 xe ha y46 ff5 fs6 fc0 sc0 ls1 ws1"> </div><div class="t m0 xf hb y47 ff2 fs1 fc2 sc0 ls1d ws1">www<span class="_ _1"></span>.max<span class="_ _1"></span>im-ic.<span class="_ _1"></span>com </div><div class="t m0 x10 hc y48 ff6 fs3 fc0 sc0 ls26 ws39"> GND</div><div class="t m0 x11 hc y49 ff6 fs3 fc0 sc0 ls1 ws1">V</div><div class="t m0 x12 hd y4a ff6 fs4 fc0 sc0 ls27 ws1">SENS+</div><div class="t m0 x10 hc y4b ff6 fs3 fc0 sc0 ls1 ws1">V</div><div class="t m0 x13 hd y4c ff6 fs4 fc0 sc0 ls27 ws1">SENS-</div><div class="t m0 x14 hc y4d ff6 fs3 fc0 sc0 ls1 ws1">V</div><div class="c x15 y4e w3 he"><div class="t m0 x0 hd y4f ff6 fs4 fc0 sc0 ls1 ws1">A</div></div><div class="t m0 x16 hd y50 ff6 fs4 fc0 sc0 ls1 ws1">D</div><div class="t m0 x17 hc y48 ff6 fs3 fc0 sc0 ls26 ws1">DQ </div><div class="t m0 x17 hc y49 ff6 fs3 fc0 sc0 ls28 ws1">NC </div><div class="t m0 x17 hc y51 ff6 fs3 fc0 sc0 ls28 ws1">NC </div><div class="t m0 x17 hc y52 ff6 fs3 fc0 sc0 ls1 ws1">V</div><div class="t m0 x18 hd y53 ff6 fs4 fc0 sc0 ls29 ws1">DD</div><div class="t m0 x19 hc y50 ff6 fs3 fc0 sc0 ls1 ws1"> </div><div class="t m0 x17 hc y54 ff6 fs3 fc0 sc0 ls1 ws1"> </div><div class="t m0 x1a hc y55 ff6 fs3 fc0 sc0 ls1 ws1">1</div><div class="t m0 x1a hc y56 ff6 fs3 fc0 sc0 ls1 ws1">2</div><div class="t m0 x1a hc y57 ff6 fs3 fc0 sc0 ls1 ws1">3</div><div class="t m0 x1a hc y58 ff6 fs3 fc0 sc0 ls1 ws1">4</div><div class="t m0 x1b hc y59 ff6 fs3 fc0 sc0 ls2a ws1">8 </div><div class="t m0 x1b hc y5a ff6 fs3 fc0 sc0 ls2a ws1">7 </div><div class="t m0 x1b hc y5b ff6 fs3 fc0 sc0 ls2a ws1">6 </div><div class="t m0 x1b hc y5c ff6 fs3 fc0 sc0 ls2a ws1">5 </div><div class="t m0 x16 hf y5d ff6 fs0 fc0 sc0 ls2b ws3a">DS2438Z, DS<span class="_ _4"></span>2438AZ </div><div class="t m0 x1c hf y5e ff6 fs0 fc0 sc0 ls2c ws3b">8-Pin SOIC<span class="_ _4"></span> (150-m<span class="_ _4"></span>il)<span class="ff1 ls1 ws1"> </span></div></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div> </body> </html>
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