FEATURES400 MSPS internal clock speedIntegrated 10-bit DAC32-bit tuning wordPhase noise ≤ –120 dBc/Hz @ 1 kHz offset (DAC output)Excellent dynamic performance>75 dB SFDR @ 160 MHz (±100 kHz offset) AOUTSerial I/O control1.8 V power supplySoftware and hardware controlled power-down48-lead TQFP/EP packageSupport for 5 V input levels on most digital inputsPLL REFCLK multiplier (4× to 20×)Internal oscillator; can be driven by a single crystalPhase modulation capabilityMultichip synchronization
上傳時間: 2014-12-04
上傳用戶:axin881314
The PCA9534 is a 16-pin CMOS device that provide 8 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications and was developed to enhance the NXP Semiconductors family of I2C-bus I/O expanders. The improvements include higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O configuration, 400 kHz clock frequency, and smaller packaging. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc.
上傳時間: 2013-11-17
上傳用戶:vodssv
This application report discusses the design of non-invasive optical plethysmographyalso called as pulsoximeter using the MSP430FG437 Microcontroller (MCU). Thepulsoximeter consists of a peripheral probe combined with the MCU displaying theoxygen saturation and pulse rate on a LCD glass. The same sensor is used for bothheart-rate detection and pulsoximetering in this application. The probe is placed on aperipheral point of the body such as a finger tip, ear lobe or the nose. The probeincludes two light emitting diodes (LEDs), one in the visible red spectrum (660nm) andthe other in the infrared spectrum (940nm). The percentage of oxygen in the body isworked by measuring the intensity from each frequency of light after it transmitsthrough the body and then calculating the ratio between these two intensities.
標簽: Pulsoximeter Single-Chip Des
上傳時間: 2013-10-27
上傳用戶:黑漆漆
用戶程序示例教程 The Blinky project is a simple program for the LPC2138using Keil MCB2130 Microcontroller Board. It blinks the LEDs at speed according to the Potentiometer setting and prints the current seting to the Serial Port 1.In addition it generates a sine wave with an adjustable frequency on the speaker of the board.
上傳時間: 2014-12-27
上傳用戶:hongmo
The XL6003 regulator is fixed frequency PWM Boost (step-up) DC/DC converter, capable ofdriving 1050mA load current with excellent line and load regulation. The regulator is simple to use because it includes internal frequency compensation and a fixed-frequency oscillator so that it requires a minimum number of external components to work. The XL6003 could directly drive 5~10 3W LED units at VIN=12V.
上傳時間: 2013-11-07
上傳用戶:xy@1314
The PCA9534 is a 16-pin CMOS device that provide 8 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications and was developed to enhance the NXP Semiconductors family of I2C-bus I/O expanders. The improvements include higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O configuration, 400 kHz clock frequency, and smaller packaging. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc.
上傳時間: 2013-10-10
上傳用戶:inwins
PCA9511, PCA9512, PCA9513, PCA9514, PCA9515, PCA9516, PCA9518,P82B96, P82B715Abstract - Philips Semiconductors family of Repeaters, Hubs and Expanders are detailed in this application notethat discusses device operation, maximum cable length and frequency calculations and typical applications.
上傳時間: 2013-11-21
上傳用戶:wlcaption
Microchip ZigBee協(xié)議棧:ZigBee™ 是專為低速率傳感器和控制網(wǎng)絡設計的無線網(wǎng)絡協(xié)議。有許多應用可從ZigBee 協(xié)議受益,其中可能的一些應用有:建筑自動化網(wǎng)絡、住宅安防系統(tǒng)、工業(yè)控制網(wǎng)絡、遠程抄表以及PC 外設。與其他無線協(xié)議相比, ZigBee 無線協(xié)議提供了低復雜性、縮減的資源要求,最重要的是它提供了一組標準的規(guī)范。它還提供了三個工作頻帶,以及一些網(wǎng)絡配置和可選的安全功能。如果您正在尋求現(xiàn)有的控制網(wǎng)絡技術(例如RS-422、RS-485)或?qū)S袩o線協(xié)議的替代方案, ZigBee 協(xié)議可能是您所需的解決方案。此應用筆記旨在幫助您在應用中采用ZigBee 協(xié)議。 可以使用在應用筆記中提供的Microchip ZigBee 協(xié)議棧快速地構建應用。為了說明該協(xié)議棧的用法,本文包含了兩個有效的演示應用程序。可將這兩個演示程序作為參考或者根據(jù)您的需求經(jīng)過簡單修改來采用它們。此應用筆記中提供的協(xié)議棧函數(shù)庫實現(xiàn)了一個與物理層無關的應用程序接口。 因此,無需做重大修改就可以輕松地在射頻(Radio Frequency,RF)收發(fā)器之間移植應用程序。在此文檔末尾的“常見問題解答”中提供了有關Microchip 協(xié)議棧和用法的一些常見問題及其答案。
上傳時間: 2013-10-08
上傳用戶:u789u789u789
當拿到一張CASE單時,首先得確定的是能用什么母體才能實現(xiàn)此功能,然后才能展開對外圍硬件電路的設計,因此首先得了解每個母體的基本功能及特點,下面大至的介紹一下本公司常用的IC:單芯片解決方案• SN8P1900 系列– 高精度 16-Bit 模數(shù)轉(zhuǎn)換器– 可編程運算放大器 (PGIA)• 信號放大低漂移: 2V• 放大倍數(shù)可編程: 1/16/64/128 倍– 升壓- 穩(wěn)壓調(diào)節(jié)器 (Charge-Pump Regulator)• 電源輸入: 2.4V ~ 5V• 穩(wěn)壓輸出: e.g. 3.8V at SN8P1909– 內(nèi)置液晶驅(qū)動電路 (LCD Driver)– 單芯片解決方案 • 耳溫槍 SN8P1909 LQFP 80 Pins• 5000 解析度量測器 SN8P1908 LQFP 64 Pins• 體重計 SN8P1907 SSOP 48 Pins單芯片解決方案• SN8P1820 系列– 精確的12-Bit 模數(shù)轉(zhuǎn)換器– 可編程運算放大器 (PGIA)• Gain Stage One: Low Offset 5V, Gain: 16/32/64/128• Gain Stage One: Low Offset 2mV, Gain: 1.3 ~ 2.5– 升壓- 穩(wěn)壓調(diào)節(jié)器• 電源輸入: 2.4V ~ 5V• 穩(wěn)壓輸出: e.g. 3.8V at SN8P1829– 內(nèi)置可編程運算放大電路– 內(nèi)置液晶驅(qū)動電路 – 單芯片解決方案 • 電子醫(yī)療器 SN8P1829 LQFP 80 Pins 高速/低功耗/高可靠性微控制器• 最新SN8P2000 系列– SN8P2500/2600/2700 系列– 高度抗交流雜訊能力• 標準瞬間電壓脈沖群測試 (EFT): IEC 1000-4-4• 雜訊直接灌入芯片電源輸入端• 只需添加1顆 2.2F/50V 旁路電容• 測試指標穩(wěn)超 4000V (歐規(guī))– 高可靠性復位電路保證系統(tǒng)正常運行• 支持外部復位和內(nèi)部上電復位• 內(nèi)置1.8V 低電壓偵測可靠復位電路• 內(nèi)置看門狗計時器保證程序跳飛可靠復位– 高抗靜電/栓鎖效應能力– 芯片工作溫度有所提高: -200C ~ 700C 工規(guī)芯片溫度: -400C ~ 850C 高速/低功耗/高可靠性微控制器• 最新 SN8P2000 系列– SN8P2500/2600/2700 系列– 1T 精簡指令級結(jié)構• 1T: 一個外部振蕩周期執(zhí)行一條指令• 工作速度可達16 MIPS / 16 MHz Crystal– 工作消耗電流 < 2mA at 1-MIPS/5V– 睡眠模式下消耗電流 < 1A / 5V額外功能• 高速脈寬調(diào)制輸出 (PWM)– 8-Bit PWM up to 23 KHz at 12 MHz System Clock– 6-Bit PWM up to 93 KHz at 12 MHz System Clock– 4-Bit PWM up to 375 KHz at 12 MHz System Clock• 內(nèi)置高速16 MHz RC振蕩器 (SN8P2501A)• 電壓變化喚醒功能• 可編程控制沿觸發(fā)/中斷功能– 上升沿 / 下降沿 / 雙沿觸發(fā)• 串行編程接口
上傳時間: 2013-10-21
上傳用戶:jiahao131
基于變頻調(diào)速的水平連鑄機拉坯輥速度控制系統(tǒng)Frequency Inverter Based Drawing RollerS peedC ontrolSy stem ofHorizontal Continuous Casting MachineA 偉劉沖旅巴(南 華 大 學電氣工程學院,衡陽421001)摘要拉坯輥速度控制是水平連鑄工藝的關鍵技術之一,采用變頻器實現(xiàn)水平連鑄機拉坯輥速度程序控制,由信號發(fā)生裝置給變頻器提供程控信號。現(xiàn)場應用表明該控制系統(tǒng)速度響應快,控制精度高,滿足了水平連鑄生產(chǎn)的需要。關鍵詞水平連鑄拉坯輥速度程序控制變頻器Absh'act Speedc ontorlof dr awingor leris on eo fth ek eyte chnologiesfo rho rizontalco ntinuousca stingm achine.Fo rth ispu rpose,fr equencyco nverterisad optedfo rdr awingor lersp eedp rogrammablec ontorlof ho rizontalco ntinuousca stingm achine,th ep rogrammableco ntorlsi gnalto fr equencyc onverteris provided場a signal generator. The results of application show that the response of system is rapid and the control accuracy is high enough to meet thedemand of production of horizontal continuous casting.Keywords Horizontalco ntinuousc asting Drawingor ler Speedp rogrammablec ontrol Ferquencyin verter 隨著 現(xiàn) 代 化工業(yè)生產(chǎn)對鋼材需求量的日益增加,連鑄生產(chǎn)能力已經(jīng)成為衡量一個國家冶金工業(yè)發(fā)展水平的重要指標之一。近十幾年來,水平連鑄由于具有投資少、鑄坯直、見效快等多方面的優(yōu)點,國內(nèi)許多鋼鐵企業(yè)利用水平連鑄機來澆鑄特種合金鋼,發(fā)揮了其獨特的優(yōu)勢并取得了較好的經(jīng)濟效益〔1,2)0采用 水 平 連鑄機澆鑄特種合金鋼時,由于拉坯機是水平連鑄系統(tǒng)中的關鍵設備之一,拉坯機及其控制性能的好壞直接影響著連鑄坯的質(zhì)量,因此,連鑄的拉坯技術便成為整個水平連鑄技術的核心。由于鋼的冶煉過程是在高溫下進行的,鋼水溫度的變化又容易影響鑄坯的質(zhì)量和成材率,因此,如何能在高溫環(huán)境下控制好與鑄坯速度相關的參數(shù)(拉、推程量,中停時間和拉坯頻率等)對于確保連鑄作業(yè)的進一步高效化,延長系統(tǒng)的連續(xù)作業(yè)時間十分關鍵。因此,拉坯輥速度控制技術是連鑄生產(chǎn)過程控制領域中的關鍵技術之- [31
標簽: 變頻調(diào)速 水平連鑄機 速度控制
上傳時間: 2013-10-12
上傳用戶:gxy670166755