特点 最高輸入頻率 10KHz 计数速度 50/10000脈波/秒可选择 四种输入模式可选择(加算,減算,加減算,90度相位差加減算) 90度相位差加減算具有提高解析度4倍功能 输入脈波具有预设刻度功能 计数暂时停止功能 3组报警功能 15BIT类比输出功能 数位RS-485界面 2:主要規格 脈波輸入型式: Jump-pin selectable current sourcing(NPN) or current sinking (PNP) 脉波触发电位: HI bias (CMOS) (VIH=7.5V, VIL=5.5V) LO bias (TTL) (VIH=3.7V, VIL=2.0V) 最高输入频率: <10KHz (up,down,up/down mode) <3KHz (quadrature mode) 输出动作时间 : 0.1 to 99.9 second adjustable 输出复归方式: Manual(N) or automatic (R or C) can be modif 继电器容量: AC 250V-5A, DC 30V-7A 显示值范围: -199999 to 999999 类比输出解析度: 15 bit DAC 输出反应速度: < 1/f+10ms(0-90%) 输出负载能力: < 10mA for voltage mode < 10V for current mode <[(V+)-7.5V]/20mA for two-wire mode 输出之涟波: < 0.1% F.S. 通讯位址: "01"-"FF" 传输速度: 19200/9600/4800/2400 selective 通信协议: Modbus RTU mode 显示幕: Red high efficiency LEDs high 14.22mm (.56") 参数设定方式: Touch switches 感应器电源: 12VDC +/-3%(<60mA) 记忆方式: Non-volatile E2PROM memory 绝缘耐压能力: 2KVac/1 min. (input/output/power) 1600Vdc (input/output) 使用环境条件: 0-50℃(20 to 90% RH non-condensed) 存放环境条件: 0-70℃(20 to 90% RH non-condensed) CE认证: EN 55022:1998/A1:2000 Class A EN 61000-3-2:2000 EN 61000-3-3:1995/A1:2001 EN 55024:1998/A1:2001
上传时间： 2013-11-23
上传用户：redmoons
特点 最高輸入頻率 10KHz 计数速度 50/10000脈波/秒可选择 四种输入模式可选择(加算,減算,加減算,90度相位差加減算) 90度相位差加減算具有提高解析度4倍功能 输入脈波具有预设刻度功能 前置量设定功能(二段設定)可选择 数位化指拨设定操作简易 计数暂时停止功能 3组报警功能 2:主要規格 脈波輸入型式: Jump-pin selectable current sourcing(NPN) or current sinking (PNP) 脉波触发电位: HI bias (CMOS) (VIH=7.5V, VIL=5.5V) LO bias (TTL) (VIH=3.7V, VIL=2.0V) 最高输入频率: <10KHz (up,down,up/down mode) <5KHz (quadrature mode) 输出动作时间 : 0.1 to 99.9 second adjustable 输出复归方式: Manual(N) or automatic (R or C) can be modif 继电器容量: AC 250V-5A, DC 30V-7A 显示值范围: -199999 to 999999 显示幕: Red high efficiency LEDs high 9.2mm (.36") 参数设定方式: Touch switches 感应器电源: 12VDC +/-3%(<60mA) ( 感應器電源 ) 记忆方式: Non-volatile E2PROM memory 绝缘耐压能力: 2KVac/1 min. (input/output/power) 1600Vdc (input/output) 使用环境条件: 0-50℃(20 to 90% RH non-condensed) 存放环境条件: 0-70℃(20 to 90% RH non-condensed) CE认证: EN 55022:1998/A1:2000 Class A EN 61000-3-2:2000 EN 61000-3-3:1995/A1:2001 EN 55024:1998/A1:2001
上传时间： 2013-11-12
上传用户：909000580
特点 精确度0.1%滿刻度 可輸入交直流電流/交直流电压/電位計/傳送器...等信号 16 BIT类比输出功能 输入与输出绝缘耐压2仟伏特/1分钟 宽范围交直流兩用電源设计 尺寸小,穩定性高 2主要規格 精确度: 0.1% F.S. (23 ±5℃) 显示值范围: 0-±19999 digit adjustable 类比输出解析度: 16 bit DAC 输出反应速度: < 250 ms (0-90%)(>10Hz) 输出负载能力: < 10mA for voltage mode < 10V for current mode 输出之涟波: < 0.1% F.S. 归零调整范围: 0- ±9999 Digit adjustable 最大值调整范围: 0- ±9999 Digit adjustable 温度系数: 50ppm/℃ (0-50℃) 显示幕: Red high efficiency LEDs high 10.16mm (0.4") 隔离特性: Input/Output/Power/Case 参数设定方式: Touch switches 记忆方式: Non-volatile E2PROM memory 绝缘抗阻: >100Mohm with 500V DC 绝缘耐压能力: 2KVac/1 min. (input/output/power) 1600Vdc (input/output) 使用环境条件: 0-60℃(20 to 90% RH non-condensed) 存放环境条件: 0-70℃(20 to 90% RH non-condensed) 安装方式: Socket/plugin type with barrier terminals CE认证: EN 55022:1998/A1:2000 Class A EN 61000-3-2:2000 EN 61000-3-3:1995/A1:2001 EN 55024:1998/A1:2001
上传时间： 2014-01-05
上传用户：eastgan
多远程二极管温度传感器-Design Considerations for pc thermal management Multiple RDTS (remote diode temperature sensing) provides the most accurate method of sensing an IC’s junction temperature. It overcomes thermal gradient and placement issues encountered when trying to place external sensors. PCB component count decreases when using a device that provides multiple inputs.Better temperature sensing improves product performance and reliability. Disk drive data integrity suffers at elevated temperatures. IBM published an article stating that a 5°C rise in operating temperature causes a 15% increase in the drive’s failure rate. The overall performance of a system can be improved by providing a more accurate temperature measurement of the most critical devices allowing them to run just a few degrees hotter.The LM83 directly senses its own temperature and the temperature of three external PN junctions. One is dedicated to the CPU of choice, the other two go to other parts of your system that need thermal monitoring such as the disk drive or graphics chip. The SMBus-compatible LM83 supports SMBus timeout and logic levels. The LM83 has two interrupt outputs; one for user-programmable limits and WATCHDOG capability (INT), the other is a Critical Temperature Alarm output (T_CRIT_A) for system power supply shutdown.
标签： Considerat Design 远程 二极管
上传时间： 2014-12-21
上传用户：ljd123456
A Computer-On-Module, or COM, is a Module with all components necessary for a bootable host computer, packaged as a super component. A COM requires a Carrier Board to bring out I/O and to power up. COMs are used to build single board computer solutions and offer OEMs fast time-to-market with reduced development cost. Like integrated circuits, they provide OEMs with significant freedom in meeting form-fit-function requirements. For all these reasons the COM methodology has gained much popularity with OEMs in the embedded industry. COM Express® is an open industry standard for Computer-On-Modules. It is designed to be future proof and to provide a smooth transition path from legacy parallel interfaces to LVDS (Low Voltage Differential Signaling) interfaces. These include the PCI bus and parallel ATA on the one hand and PCI Express and Serial ATA on the other hand.
上传时间： 2013-11-05
上传用户：Wwill
The Maxim Integrated 71M6541-DB REV 3.0 Demo Board is a demonstration board for evaluating the 71M6541 device for single-phase electronic energy metering applications in conjunction with the Remote Sensor Inter-face. It incorporates a 71M6541 integrated circuit, a 71M6601 Remote Interface IC, peripheral circuitry such as a serial EEPROM, emulator port, and on-board power supply. A serial to USB converter allows communication to a PC through a USB port. The Demo Board allows the evaluation of the 71M6541 energy meter chip for measurement accuracy and overall system use.
上传时间： 2013-11-06
上传用户：雨出惊人love
protel99电子线路图绘图工具.Protel99SE是Protel公司近10年来致力于Windows平台开发的最新结晶，能实现从电学概念设计到输出物理生产数据，以及这之间的所有分析、验证和设计数据管理。因而今天的Protel最新产品已不是单纯的PCB（印制电路板）设计工具，而是一个系统工具，覆盖了以PCB为核心的整个物理设计。 最新版本的Protel软件可以毫无障碍地读Orcad、Pads、Accel(PCAD)等知名EDA公司设计文件，以便用户顺利过渡到新的EDA平台。 Protel99 SE共分5个模块，分别是原理图设计、PCB设计（包含信号完整性分析）、自动布线器、原理图混合信号仿真、PLD设计。 以下介绍一些Protel99SE的部分最新功能： ◆可生成30多种格式的电气连接网络表； ◆强大的全局编辑功能； ◆在原理图中选择一级器件，PCB中同样的器件也将被选中； ◆同时运行原理图和PCB，在打开的原理图和PCB图间允许双向交叉查找元器件、引脚、网络 ◆既可以进行正向注释元器件标号（由原理图到PCB），也可以进行反向注释（由PCB到原理图），以保持电气原理图和PCB在设计上的一致性； ◆满足国际化设计要求（包括国标标题栏输出，GB4728国标库）； * 方便易用的数模混合仿真（兼容SPICE 3f5）； ◆支持用CUPL语言和原理图设计PLD，生成标准的JED下载文件； * PCB可设计32个信号层，16个电源-地层和16个机加工层； ◆强大的“规则驱动”设计环境，符合在线的和批处理的设计规则检查； ◆智能覆铜功能，覆铀可以自动重铺； ◆提供大量的工业化标准电路板做为设计模版； ◆放置汉字功能； ◆可以输入和输出DXF、DWG格式文件，实现和AutoCAD等软件的数据交换； ◆智能封装导航（对于建立复杂的PGA、BGA封装很有用）； ◆方便的打印预览功能，不用修改PCB文件就可以直接控制打印结果； ◆独特的3D显示可以在制板之前看到装配事物的效果； ◆强大的CAM处理使您轻松实现输出光绘文件、材料清单、钻孔文件、贴片机文件、测试点报告等； ◆经过充分验证的传输线特性和仿真精确计算的算法，信号完整性分析直接从PCB启动； ◆反射和串扰仿真的波形显示结果与便利的测量工具相结合； ◆专家导航帮您解决信号完整性问题。
上传时间： 2013-10-14
上传用户：hanwudadi
The CC1101 is a low-cost sub- 1 GHztransceiver designed for very low-powerwireless applications. The circuit is mainlyintended for the ISM (Industrial, Scientific andMedical) and SRD (Short Range Device)frequency bands at 315, 433, 868, and 915MHz, but can easily be programmed foroperation at other frequencies in the 300-348MHz, 387-464 MHz and 779-928 MHz bands.CC1101 is an improved and code compatibleversion of the CC1100 RF transceiver. Themain improvements on the CC1101 include:
上传时间： 2013-11-12
上传用户：363186
The LPC2292/2294 microcontrollers are based on a 16/32-bit ARM7TDMI-S CPU with real-time emulation and embedded trace support, together with 256 kB of embedded high-speed flash memory. A 128-bit wide memory interface and a unique accelerator architecture enable 32-bit code execution at the maximum clock rate. For critical code size applications, the alternative 16-bit Thumb mode reduces code by more than 30 pct with minimal performance penalty. With their 144-pin package, low power consumption, various 32-bit timers, 8-channel 10-bit ADC, 2/4 (LPC2294) advanced CAN channels, PWM channels and up to nine external interrupt pins these microcontrollers are particularly suitable for automotive and industrial control applications as well as medical systems and fault-tolerant maintenance buses. The number of available fast GPIOs ranges from 76 (with external memory) through 112 (single-chip). With a wide range of additional serial communications interfaces, they are also suited for communication gateways and protocol converters as well as many other general-purpose applications. Remark: Throughout the data sheet, the term LPC2292/2294 will apply to devices with and without the /00 or /01 suffix. The suffixes /00 and /01 will be used to differentiate from other devices only when necessary.
上传时间： 2014-12-30
上传用户：aysyzxzm
Abstract: The process of designing a radio system can be complex and often involves many project tradeoffs. Witha little insight, balancing these various characteristics can make the job of designing a radio system easier. Thistutorial explores these tradeoffs and provides details to consider for various radio applications. With a focus on theindustrial, scientific, medical (ISM) bands, the subjects of frequency selection, one-way versus two-way systems,modulation techniques, cost, antenna options, power-supply influences, effects on range, and protocol selectionare explored.
标签： 无线
上传时间： 2013-12-13
上传用户：eastgan
