數(shù)字溫度傳感器畢業(yè)論文中英文資料外文翻譯文獻

1、中英文資料外文翻譯文獻 畢業(yè)論文中英文資料外文翻譯文獻外文資料ds1722 digital thermometerwith scientific and technological progress and development of the types of temperature sensors increasingly wide range of application of the increasingly widespread, and the beginning analog toward digital, single-bus, dual-bus and bus-3 direc

2、tion. and the number of temperature sensors because they apply to all microprocessor interface consisting of automatic temperature control system simulation can be overcome sensor and microprocessor interface need signal conditioning circuit and a / d converters advantages of the drawbacks, has been

3、 widely used in industrial control, electronic transducers, medical equipment and other temperature control system. among them, which are more representative of a digital temperature sensor ds18b20, max6575, the ds1722, max6636 other. this paper introduces the ds1722 digital temperature sensor chara

4、cteristics, the use of the method and its timing. internal structure and other relevant content. features:temperature measurements require no external components;measures temperatures from -55c to +120c. fahrenheit equivalent is -67f to +248f;thermometer accuracy is 2.0c;thermometer resolution is co

5、nfigurable from 8 to 12 bits (1.0c to 0.0625cresolution);data is read from/written to via a motorola serial peripheral interface (spi) or standard 3-wire serial interface;wide analog power supply range (2.65v - 5.5v);separate digital supply allows for 1.8v logic;available in an 8-pin soic (150 mil),

6、 8-pin usop, and flip chip package;pin assignmentfigure 1 pin assignmentpin description:sermode - serial interface mode.ce - chip enable.sclk - serial clock.gnd ground.vdda - analog supply voltage.sdo - serial data out.sdi - serial data in.vddd - digital supply voltage.description:the ds1722 digital

7、 thermometer and thermostat with spi/3-wire interface provides temperature readings which indicate the temperature of the device. no additional components are required; the device is truly a temperature-to-digital converter. temperature readings are communicated from the ds1722 over a motorola spi i

8、nterface or a standard 3-wire serial interface. the choice of interface standard is selectable by the user. for applications that require greater temperature resolution, the user can adjust the readout resolution from 8 to 12 bits. this is particularly useful in applications where thermal runaway co

9、nditions must be detected quickly.for application flexibility, the ds1722 features a wide analog supply rail of 2.65v - 5.5v. a separate digital supply allows a range of 1.8v to 5.5v. the ds1722 is available in an 8-pin soic (150-mil), 8-pin usop, and flip chip package.applications for the ds1722 in

10、clude personal computers/servers/workstations, cellular telephones, office equipment, or any thermally-sensitive system.overview:a block diagram of the ds1722 is shown in figure 2. the ds1722 consists of four major components:1. precision temperature sensor.2. analog-to-digital converter.3. spi/3-wi

11、re interface electronics.4. data registers.the factory-calibrated temperature sensor requires no external components. the ds1722 is in a power conserving shutdown state upon power-up. after power-up, the user may alter the configuration register to place the device in a continuous temperature conver

12、sion mode or in a one-shot conversion mode. in the continuous conversion mode, the ds1722 continuously converts the temperature and stores the result in the temperature register. as conversions are performed in the background, reading the temperature register does not affect the conversion in progre

13、ss. in the one-shot temperature conversion mode, the ds1722 will perform one temperature conversion, store the result in the temperature register, and then eturn to the shutdown state. this conversion mode is ideal for power sensitive applications. more information on the configuration register is c

14、ontained in the “operation-programming” section. the temperature conversion results will have a default resolution of 9 bits. in applications where small incremental temperature changes are critical, the user can change the conversion resolution from 9 bits to 8, 10, 11, or 12. this is accomplished

15、by programming the configuration register. each additional bit of resolution approximately doubles the conversion time. the ds1722 can communicate using either a motorola serial peripheral interface (spi) or standard 3-wire interface. the user can select either communication standard through the ser

16、mode pin, tying it to vddd for spi and to ground for 3-wire. the device contains both an analog supply voltage and a digital supply voltage (vdda and vddd, respectively). the analog supply powers the device for operation while the digital supply provides the top rails for the digital inputs and outp

17、uts. the ds1722 was designed to be 1.8v logic-ready.ds1722 functional block diagram figure 2operation-measuring temperature:the core of ds1722 functionality is its direct-to-digital temperature sensor. the ds1722 measures temperature through the use of an on-chip temperature measurement technique wi

18、th an operating range from -55to +120c. the device powers up in a power-conserving shutdown mode. after power-up, the ds1722 may be placed in a continuous conversion mode or in a one-shot conversion mode. in the continuous conversion mode, the device continuously computes the temperature and stores

19、the most recent result in the temperature register at addresses 01h (lsb) and 02h (msb). in the one-shot conversion mode, the ds1722 performs one temperature conversion and then returns to the shutdown mode, storing temperature in the temperature register. details on how to change the setting after

20、power up are contained in the “operation-programming” section. the resolution of the temperature conversion is configurable (8, 9, 10, 11, or 12 bits), with 9-bit readings the default state. this equates to a temperature resolution of 1.0c, 0.5c, 0.25c, 0.125c, or 0.0625c. following each conversion,

21、 thermal data is stored in the thermometer register in twos complement format; the information can be retrieved over the spi or 3-wire interface with the address set to the temperature register, 01h (lsb) and then 02h (msb). table 2 describes the exact relationship of output data to measured tempera

22、ture. the table assumes the ds1722 is configured for 12-bit resolution; if the evince is configured in a lower resolution mode, those bits will contain 0s. the data is transmitted serially over the digital interface, msb first for spi communication and lsb first for 3-wire communication. the msb of

23、the temperature register contains the “sign” (s) bit, denoting whether the temperature is positive or negative. for fahrenheit usage, a lookup table or conversion routine must be used. addresslocations2625242322212002hmsb (unit = ) lsb2-12-22-32-4000001htemperaturedigital output(binary)digital outpu

24、t(hex)+1200111 1000 0000 00007800h+25.06250001 1001 0001 00001910h+10.1250000 1010 0010 00000a20h+0.50000 0000 1000 00000080h00000 0000 0000 00000000h-0.51111 1111 1000 0000ff80h-10.1251111 0101 1110 0000f5e0h-25.06251110 0110 1111 0000e6f0h-551100 1001 0000 0000c900hoperation-programming:the area o

25、f interest in programming the ds1722 is the configuration register. all programming is done via the spi or 3-wire communication interface by selecting the appropriate address of the desired register location. table 3 illustrates the addresses for the two registers (configuration and temperature) of

26、the ds1722.register address structure table 3read addresswrite addressactive register00h80hconfiguration01hno accesstemperature lsb02hno accesstemperature msbconfiguration register programming:the configuration register is accessed in the ds1722 with the 00h address for reads and the 80h address for

27、 writes. data is read from or written to the configuration register msb first for spi communication and lsb first for 3-wire communication. the format of the register is illustrated in figure 2. the effect each bit has on ds1722 functionality is described below along with the power-up state of the b

28、it. the entire register is volatile, and thus it will power-up in the default state.configuration/status register figure 21shot = one-shot temperature conversion bit. if the sd bit is 1, (continuous temperature conversions are not taking place), a 1 written to the 1shot bit will cause the ds1722 to

29、perform one temperature conversion and store the results in the temperature register at addresses 01h (lsb) and 02h (msb). the bit will clear itself to 0 upon completion of the temperature conversion. the user has read/write access to the 1shot bit, although writes to this bit will be ignored if the

30、 sd bit is a 0, (continuous conversion mode). the power-up default of the one-shot bit is 0.r0, r1, r2 = thermometer resolution bits. table 4 below defines the resolution of the digital thermometer, based on the settings of these 3 bits. there is a direct tradeoff between resolution and conversion t

31、ime, as depicted in the ac electrical characteristics. the user has read/write access to the r2, r1 and r0 bits and the power-up default state is r2=0, r1=0, and r0=1 (9-bit conversions).thermometer resolution configuration table 4r2r1r0thermometerresolutionmaxconversiontime0008-bit0.075s0019-bit0.1

32、5s01010-bit0.3s01111-bit0.6s1xx12-bit1.2ssd = shutdown bit. if sd is 0, the ds1722 will continuously perform temperature conversions and store the last completed result in the temperature register. if sd is changed to a 1, the conversion in progress will be completed and stored and then the device w

33、ill revert to a low-power shutdown mode. the communication port remains active. the user has read/write access to the sd bit and the power-up default is 1 (shutdown mode).serial interface:the ds1722 offers the flexibility to choose between two serial interface modes. the ds1722 can communicate with

34、the spi interface or with a standard 3-wire interface. the interface method used is determined by the sermode pin. when this pin is connected to vddd spi communication is selected. when this pin is connected to ground, standard 3-wire communication is selected.serial peripheral interface (spi):the s

35、erial peripheral interface (spi) is a synchronous bus for address and data transfer. the spi mode of serial communication is selected by tying the sermode pin to vddd. four pins are used for the spi. the four pins are the sdo (serial data out), sdi (serial data in), ce (chip enable), and sclk (seria

36、l clock). the ds1722 is the slave device in an spi application, with the microcontroller being the master. the sdi and sdo pins are the serial data input and output pins for the ds1722, respectively. the ce input is used to initiate and terminate a data transfer. the sclk pin is used to synchronize

37、data movement between the master (microcontroller) and the slave (ds1722) devices. the shift clock (sclk), which is generated by the microcontroller, is active only when ce is high and during address and data transfer to any device on the spi bus. the inactive clock polarity is programmable in some

38、microcontrollers. the ds1722 offers an important feature in that the level of the inactive clock is determined by sampling sclk when ce becomes active. therefore, either sclk polarity can be accommodated. there is one clock for each bit transferred. address and data bits are transferred in groups of

39、 eight, msb first.3-wire serial data bus:the 3-wire communication mode operates similar to the spi mode. however, in 3-wire mode, there is one bi-directional i/o instead of separate data in and data out signals. the 3-wire consists of the i/o (sdi and sdo pins tied together), ce, and sclk pins. in 3

40、-wire mode, each byte is shifted in lsb first unlike spi mode where each byte is shifted in msb first. as is the case with the spi mode, an address byte is written to the device followed by a single data byte or multiple data bytes.外文資料譯文ds1722數(shù)字溫度傳感器隨著科學(xué)技術(shù)的不斷進步和發(fā)展，溫度傳感器的種類日益繁多，應(yīng)用逐漸廣泛，并且開始由模擬式向著數(shù)字式、

41、單總線式、雙總線式和三總線式發(fā)展。而數(shù)字溫度傳感器更因適用于各種微處理器接口組成的自動溫度控制系統(tǒng)具有可以克服模擬傳感器與微處理器接口時需要信號調(diào)理電路和a/d轉(zhuǎn)換器的弊端等優(yōu)點，被廣泛應(yīng)用于工業(yè)控制、電子測溫計、醫(yī)療儀器等各種溫度控制系統(tǒng)中。其中，比較有代表性的數(shù)字溫度傳感器有ds18b20、max6575、ds1722、max6636等。本文主要介紹了數(shù)字溫度傳感器ds1722的特性、使用方法以及它的時序、內(nèi)部結(jié)構(gòu)等相關(guān)內(nèi)容。特點：(1) 溫度測量無需外部元件。(2) 測量溫度范圍從-55至+120，華氏等量溫度為-67248。(3) 溫度測量精度為2.0 。(4) 溫度測量配置可為8位至

42、12位分辨率(即1.0至0.0625分辨率)。(5) 數(shù)據(jù)讀寫接口方式可以是motorola串行外設(shè)接口或三線串行接口。(6) 模擬電源電壓范圍(2.65v到5.5v )。(7) 單獨的邏輯數(shù)字電壓允許在1.8v。(8) 具有8管腳soic(150 mil )封裝和8管腳usop封裝兩種封裝形式。圖1 管腳圖管腳描述：sermode-串行接口模式ce-芯片使能sclk-串行時鐘線gnd-地vdda-模擬電源電壓sdo-串行數(shù)據(jù)輸出sdi-串行數(shù)據(jù)輸入vddd-數(shù)字電源電壓描述：具有spi接口和三總線接口的ds1722數(shù)字溫度傳感器是一個可以對溫度進行讀取的裝置。對溫度測量不需要外部元件輔助，它

43、是一個真正的溫度-數(shù)字轉(zhuǎn)換器。溫度數(shù)據(jù)通信通過ds1722 的motorola spi 接口或者一個標(biāo)準(zhǔn)三總線 串行接口來實現(xiàn)。接口標(biāo)準(zhǔn)選擇由用戶自己來決定。應(yīng)用中，如要求更大溫度分辨率，用戶可以調(diào)整分辨率從8位至12位。在必須迅速偵查到熱失控的情況下，這是特別方便的應(yīng)用。應(yīng)用的靈活性，ds1722芯片的模擬供電電壓范圍為2.65v到5.5v，而一個單獨的數(shù)字電壓供電允許范圍為1.8v至5.5v。 ds1722具有8管腳soic(150 mil )封裝和8管腳usop封裝兩種封裝形式。ds1722的應(yīng)用領(lǐng)域可以涉及到個人計算機/服務(wù)器/工作組，單元電話，辦公設(shè)備，或任何熱敏感系統(tǒng)。概況：ds1

44、722的內(nèi)部結(jié)構(gòu)方框圖如圖2所示：圖2 內(nèi)部結(jié)構(gòu)方框圖數(shù)字溫度傳感器ds1722由四個主要部分成：精密溫度傳感器。(1) 模數(shù)轉(zhuǎn)換器。(2) spi/三線接口電子器件。(3) 數(shù)據(jù)寄存器。(4) 這種溫度傳感器無需外部元件.開始供電時，ds1722處于能量關(guān)閉狀態(tài)，供電之后，用戶通過改變寄存器分辨率使其處于連續(xù)轉(zhuǎn)換溫度模式或者單一溫度轉(zhuǎn)換模式.連續(xù)轉(zhuǎn)換模式下，ds1722連續(xù)轉(zhuǎn)換溫度并將結(jié)果存于溫度寄存器中，如同轉(zhuǎn)換只是一種背景，讀溫度寄存器中的內(nèi)容不影響其溫度轉(zhuǎn)換;在單一轉(zhuǎn)換模式，ds1722執(zhí)行一次溫度轉(zhuǎn)換，結(jié)果存于溫度寄存器中，然后回到關(guān)閉模式，這種轉(zhuǎn)換模式適用于對溫度敏感的應(yīng)用場合。更

45、多關(guān)于配置寄存器的內(nèi)容包含在“編程操作”部分。溫度轉(zhuǎn)換結(jié)果的默認分辨率為9位。在應(yīng)用中，小增量溫度變化是至關(guān)重要的， 用戶可以通過改變分辨率寄存器來實現(xiàn)不同的溫度分辨率，從第9位可以改變到8位 、10位、11或12，這些是通過程序配置寄存器來完成。但每增加一位大約增加一倍的轉(zhuǎn)換時間。ds1722有摩托羅拉串行接口和標(biāo)準(zhǔn)三線接口兩種通信接口，用戶可以通過sermode管腳來選擇通信標(biāo)準(zhǔn)，sermode管腳接vddd為spi接口，sermode管腳接地為標(biāo)準(zhǔn)三線接口。該裝置包含一個模擬電源電壓和一個數(shù)字電源電壓( 即：vdda和vddd)，模擬電源電壓供給裝置的運行，而數(shù)字電源電壓供應(yīng)數(shù)字輸入和輸

46、出.ds1722是為1.8v邏輯電壓而設(shè)計準(zhǔn)備的。溫度測量操作：ds1722 功能核心是它是以直接數(shù)字式溫度傳感器來工作的。ds1722 溫度測量通過一個芯片溫度測量技術(shù)來實現(xiàn)，測量范圍從-55到+120。該裝置在供電前處于待機模式，在供電后，ds1722可可能會被置于續(xù)轉(zhuǎn)換模式或單一轉(zhuǎn)換模式。在連續(xù)轉(zhuǎn)換模式狀態(tài)下，該裝置連續(xù)計算溫度并把測溫數(shù)據(jù)的最新結(jié)果存儲在溫度寄存器的地址位01h（lsb）和02h（msb）；在單一轉(zhuǎn)換模式狀態(tài)下，ds1722執(zhí)行一次溫度轉(zhuǎn)換，結(jié)果存于溫度寄存器中，然后回到關(guān)閉模式。關(guān)于詳細介紹在供殿后如何更改設(shè)置包含在“編程操作”部分。溫度轉(zhuǎn)換分辨率配置可以分為（8，9

47、，10，11，12位），且在默認狀態(tài)下為9位；其對應(yīng)分辨率分別為1.0，0.5，0.25，0.125，和0.0625。傳感器ds1722將溫度轉(zhuǎn)換后以二進制的補碼格式存儲于溫度寄存器中，通過spi或者三線接口，溫度寄存器中的地址01h（lsb）和02h（msb）中的數(shù)據(jù)可以被讀出來，表2描述了輸出的數(shù)據(jù)與被測量的溫度的確切關(guān)系，表中假設(shè)ds1722配置為12位分辨率；如果設(shè)備被配置在一個低分辨率方式下，那些位將包含0s。數(shù)據(jù)通過數(shù)字接口連續(xù)傳送，msb首先通過spi傳輸，lsb首先通過三線傳輸。溫度寄存器器的msb包含“標(biāo)志”(s)位，表示溫度是正值或負值。若為華氏用法，必須使用查表或轉(zhuǎn)換規(guī)則

48、。表2 溫度與地址數(shù)據(jù)格式關(guān)系s2625242322212002hmsb (單位為) lsb2-12-22-32-4000001h溫度值數(shù)字輸入(二進制)數(shù)字輸出(十六進制)+1200111 1000 0000 00007800h+25.06250001 1001 0001 00001910h+10.1250000 1010 0010 00000a20h+0.50000 0000 1000 00000080h00000 0000 0000 00000000h-0.51111 1111 1000 0000ff80h-10.1251111 0101 1110 0000f5e0h-25.06251110 0110 1111 0000e6f0h-551100 1001 0000 0000c900h編程操作：編程操作主要在于規(guī)劃ds1722配置寄存器。ds1722的所有的工作程序由spi接口或者三總線通信接口通過選擇狀態(tài)寄存器位置適合的地址來完成。表3為寄存器的地址表格，說明了ds1722有兩個寄存器（狀態(tài)和溫度）的地址。表3 寄存器地址讀地