DMD4059系列信号调节器

DMD4059 SeriesStrain Gauge to DC Isolated TransmitterM-5000/1114e-mail:**************For latest product manuals:User’s Gui deShop online atDescriptionThe DMD4059 accepts an input from one to four strain gauges, bridge sensors, load cells, or pressure transducers. It filters, amplifies, and converts the resulting millivolt signal into the selected DC voltage or current output that is linearly related to the input.The full 3-way (input, output, power) isolation makes this module useful for ground loop elimination and signal isolation.The adjustable excitation power supply generates a stable source of voltage to drive from one to four 350 Ω (or greater) devices. Sense lead circuitry is included to cancel the effects of leadwire resistance.Input, output, excitation and zero offset (up to ±100% of span) are field configurable. Non-interactive zero and span simplifies calibration.A 20 VDC loop excitation supply for the output can be selectively wired to power passive mA devices.A green input LED and a red output LED vary in intensity with changes in the process input and output signals.An output test button provides a fixed output (independent of the input) when held depressed. The test output level is potentiom-eter adjustable from 0 to 100% of output span.Input Range100 Ω to 10,000 Ω bridges at 10 VDC Up to four 350 Ω bridges at 10 VDC Minimum: 0 to 5 mV range 0.5 mV/V sensitivity Maximum: 0 to 400 mV range 40 mV/V sensitivity Millivolt output range is determined by the sensor sensitivity (mV/V) and the excitation voltage:mV/V sensitivity X excitation voltage = total mV range Input Impedance 200 k Ω typicalExcitation VoltageSwitch Selectable: 0-10 VDC in 1 V increments Maximum Output: 10 VDC maximum at 120 mADrive Capability: Up to four 350 Ω bridges at 10 VDC Fine Adjustment: ±5% via multi-turn potentiometer Stability: ±0.01% per °C Sense Lead CompensationBetter than ±0.01% per 1 Ω change in leadwire resistance Maximum leadwire resistance: 10 Ω with 350 Ω at 10 VDC Zero Offset (Tare)±100% of span in 15% increments LED IndicatorsVariable brightness LEDs for input/output loop level and status Output Ranges Voltage (10 mA max.): 0-1 VDC to 0-10 VDC Bipolar Voltage (±10 mA max.): ±5 VDC or ±10 VDC Current: 0-2 mADC to 0-25 mADC Compliance, drive at 20 mA: 20 V, 1000 Ω drive Current output can be selectively wired for sink or source Output Linearity, Ripple & NoiseBetter than ±0.1% of span, <10 mV RMS ripple and noise Output Zero and SpanMulti-turn potentiometers to compensate for load and lead variations, ±15% of span adjustment range typical Output Test ButtonSets output to test level when pressed Potentiometer adjustable 0-100% of span Response Time70 milliseconds typical, faster response times are available Common Mode Rejection 100 dB minimum Isolation1200 V RMS min.Full isolation: power to input, power to output, input to output Ambient Temperature Range and Stability –10°C to +60°C operating ambientBetter than ±0.02% of span per °C stability Power85-265 VAC, 50/60 Hz or 60-300 VDCDC versions: 9-30 VDC or 10-32 VAC 50/60 HzPower consumption: 2 to 5 W depending on number of loadcellsDMD4059 Series Strain Gauge to DC Isolated Transmitter2ABCD1. Set Switch A for desired Excitation Voltage.2. Set Switches B/C/D for desired Input / Output ranges.3. Set Switch E for Voltage or Current as required.4. Set Excitation / Zero / Span / Test Cal. Controls Connections3469101112Term. #Sig. Out –Sig. Out +Sense Lead Sig. Input +Exc. –Sig. Input –Exc. +DMD4059For more Details4C 08E 2A63FB 759D 105164978324C 08E 2A63FB 759D 14C 08E 2A63FB 759D1Electrical ConnectionsCheck white model/serial number label for module operating voltage to make sure it matches available power.WARNING! All wiring must be performed by a qualified electri-cian or instrumentation engineer. See diagram at right for terminal designations and wiring examples.Avoid shock hazards! Turn signal input, output, and power off before connecting or disconnecting wiring. Connect I/O wiring before power wiring.Module Power TerminalsWhen using DC power, either polarity is acceptable, but for consistency with similar products, positive (+) can be wired to terminal 13 and negative (–) can be wired to terminal 16.Signal Input TerminalsConnect up to 4 strain gauges or load cells. See manufacturer’s specifications for wiring designations and wire color-coding. Polarity must be observed when connecting inputs.CAUTION: Never short the excitation leads together. This will cause internal damage to the module.Some bridges may have one or two sense leads. See manu-facturer’s specifications. Sense leads allow the DMD4059 to compensate for leadwire resistance effects. Observe polarity when connecting sense leads.If no sense lead is used, jumper sense (+) terminal 6 and excita-tion (+) 12.Calibration should be done after all connections are made.Signal Output TerminalsPolarity must be observed when connecting the signal output.The DMD4059 output can be wired to provide either a sinking or sourcing mA output. If your device accepts a current input, determine if it provides power to the current loop or if it must be powered by the DMD4059 module.Use a multi-meter to check for voltage at your device’s input terminals. Typical voltage may be 9-24 VDC. See the wiring diagram for the appropriate connections.Output Test FunctionWhen the test button is depressed it will drive the output with aknown good signal that can be used as a diagnostic aid duringinitial start-up or troubleshooting. When released, the output willreturn to normal.The Test Cal. potentiometer can be used to set the test outputto the desired level. It is adjustable from 0 to 100% of theoutput span.Press and hold the Test button and adjust the Test Cal. potenti-ometer for the desired output level.Installation PrecautionsWARNING! Avoid shock hazards! Turn signal input, output, andpower off before connecting or disconnecting wiring, or remov-ing or installing module.Mounting to a DIN RailThe housing clips to a standard 35 mm DIN rail. The housing isIP40 rated and requires a protective panel or enclosure.1. Tilt front of module downward and position against DIN rail.2. Clip lower mount to bottom edge of DIN rail.3. Push front of module upward until upper mount snaps intoplace.Removal1. Push up on the bottom back of the module.2. Tilt front of module downward to release upper mount fromtop edge of DIN rail.3. The module can now be removed from the DIN rail.OperationStrain gauges and load cells are normally passive devices thatare commonly referred to as “bridges” due to their four-resistorWheatstone bridge configuration. These sensors require aprecise excitation source to produce an output that is directlyproportional to the load, pressure that is applied to the sensor.The exact output of the sensor (measured in millivolts) is deter-mined by the sensitivity of the sensor (mV/V) and the excitationvoltage applied.An additional input, the sense lead, monitors the voltage drop inthe sensor leads and automatically compensates the excitationvoltage at the module in order to maintain a constant excitationvoltage at the sensor.The DMD4059 provides the excitation voltage to the sensors andreceives the resulting millivolt signal in return. This input signalis filtered and amplified, then offset, if required, and passedto the output stage. Depending on the output configurationselected, a DC voltage or current output is generated.The green input LED provides a visual indication that a signalis being sensed by the input circuitry of the module. It alsoindicates the input signal strength by changing in intensity asthe process changes from minimum to maximum.If the LED fails to illuminate, or fails to change in intensity asthe process changes, check the module power or signal inputwiring. Note that it may be difficult to see the LEDs under brightlighting conditions.The red output LED provides a visual indication that the outputsignal is functioning. It becomes brighter as the input and thecorresponding output change from minimum to maximum.For current outputs, the red LED will only light if the output loopcurrent path is complete. For either current or voltage outputs,failure to illuminate or a failure to change in intensity as theprocess changes may indicate a problem with the module poweror signal output wiring.151613 Power AC or DC +14 Earth Ground16 Power AC or DC –Module PowerCurrent sinking outputswitch E set to “I”power to output loopCurrent sourcing outputswitch E set to “I”+20 V at terminal 4Voltage outputswitch E set to “V”Output WiringTo achieve optimum results, the system should be calibratedusing an accurate bridge simulator, pressure calibrator, or cali-bration weights depending on the application.1. Apply power to the module and allow a minimum 20 minutewarm up time.2. Using an accurate voltmeter across terminals 10 and 12,adjust the excitation voltage potentiometer for the exact volt-age desired.3. Provide an input to the module equal to zero or the minimuminput required for the application.4. Using an accurate measurement device for the moduleoutput, adjust the Zero potentiometer for the exact mini-mum output signal desired. The Zero control should only beadjusted when the input signal is at its minimum.5. Set the input at maximum, and then adjust the Span pot forthe exact maximum output desired. The Span control shouldonly be adjusted when the input signal is at its maximum.6. Repeat the zero and span calibration for maximum accuracy.1112Sig–Exc+InputDMD4059Strain Gauge to DCIsolated TransmitterLEDNo Sense Leads Jumper 6 to 12 ONLY ifsense leads are NOT used1112Exc+InputDMD4059Strain Gauge to DCIsolated TransmitterLEDIt is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly pursuing certification of its products to the European New Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts no liability for any errors it contains, and reserves the right to alter specifications without notice. WARNING: These products are not designed for use in, and should not be used for, human applications.WARRANTY/DISCLAIMEROMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product.If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of having been damaged as a result of excessive corrosion; or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating conditions outside of OMEGA’s control. Components which wear are not warranted, including but not limited to contact points, fuses, and triacs.OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by it will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of OMEGA with respect to this order, whether based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall not exceed the purchase price of the component upon which liability is based. In no event shall OMEGA be liable for consequential, incidental or special damages.CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should any Product(s) be used in or with any nuclear installation or activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our basic WARRANTY / DISCLAIMER language, and, additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damagewhatsoever arising out of the use of the Product(s) in such a manner.Servicing North America:USA:One Omega Drive, Box 4047 ISO 9001 Certified S tamford CT 06907-0047Tel: (203) 359-1660FAX: (203) 359-7700e-mail:**************Canada: 976 BergarLaval (Quebec) H7L 5A1, CanadaTel: (514) 856-6928 FAX: (514) 856-6886 e-mail:*************For immediate technical or application assistance:USA and Canada: S ales Service: 1-800-826-6342 / 1-800-TC-OMEGA®Customer Service: 1-800-622-2378 / 1-800-622-BEST ®Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN ® TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGAMexico:En Espan ˜ol: (001) 203-359-7803 e-mail:*****************FAX: (001) 203-359-7807**************.mxOMEGAnet ® Online ServiceInternet e-mail**************Servicing Europe:Benelux:P ostbus 8034, 1180 LA Amstelveen, The Netherlands Tel: +31 (0)20 3472121 FAX: +31 (0)20 6434643Toll Free in Benelux: 0800 0993344e-mail:*****************Czech Republic:Frystatska 184, 733 01 Karviná, Czech RepublicTel: +420 (0)59 6311899 FAX: +420 (0)59 6311114Toll Free: 0800-1-66342 e-mail:*****************France:11, rue Jacques Cartier, 78280 Guyancourt, France Tel: +33 (0)1 61 37 2900 FAX: +33 (0)1 30 57 5427 Toll Free in France: 0800 466 342e-mail:**************Germany/Austria: D aimlerstrasse 26, D-75392 Deckenpfronn, GermanyTel: +49 (0)7056 9398-0 FAX: +49 (0)7056 9398-29 TollFreeinGermany************e-mail:*************United Kingdom: O ne Omega Drive, River Bend Technology CentreISO 9002 CertifiedNorthbank, Irlam, Manchester M 44 5BD United KingdomTel: +44 (0)161 777 6611 FAX: +44 (0)161 777 6622Toll Free in United Kingdom: 0800-488-488e-mail:**************.ukM-5000/1114RETURN REQUESTS / INQUIRIESDirect all warranty and repair requests/inquiries to the OMEGA C ustomer Service Department. BEFORE RETURNING ANY PRODUC T(S) TO OMEGA, PURC HASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S C USTOMER SERVIC E DEPARTMENT (IN ORDER TO AVOID PROC ESSING DELAYS). The assigned AR number should then be marked on the outside of the return package and on any correspondence.The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit.PATENT NOTIC E: U. S. Pat. No. 6,074,089; 5,465,838 / C anada 2,228,333; 2,116,055 / UK GB 2,321,712 / Holland 1008153 / Israel 123052 / France 2 762 908 / EPO 0614194. Other patents pending.FOR WARRANTY RETURNS, please have the following information available BEFORE contacting OMEGA:1. P urchase Order number under which the product was PURCHASED,2. M odel and serial number of the product under warranty, and 3. R epair instructions and/or specific problems relative to the product.FOR NON-WARRANTY REPAIRS, consult OMEGA for current repair charges.Have the following information available BEFORE contacting OMEGA:1. Purchase Order number to cover the C OST of the repair,2. Model and serial number of the product, and3. Repair instructions and/or specific problems relative to the product.OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers the latest in technology and engineering.OMEGA is a registered trademark of OMEGA ENGINEERING, INC.© Copyright 2004 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the prior written consent of OMEGA ENGINEERING, INC.。

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LDX-305A三回路LED调光器【使用手册】永林电子（上海）有限公司网址： Email：*************************.tw目录1 系统简介 (1)1－1特点 (1)1－2规格 (1)1－3操作面板功能简介 (1)2 系统操作说明 (2)2－1内建模式的设定与呼叫 (2)2－2设备区域的设定 (2)2－3ID NO.的设定 (3)2－4设定场景对应各内建模式 (3)2－5DMX控制设定 (4)2－6内建跳机的SPEED调整设定 (4)2－7DMX地址的设定 (5)2－8单回路LEVEL查看与自定颜色的设定 (5)2－9智能模式的选定 (5)2－10红外遥控面板上的设置 (7)2－11接受控制面板控制 (8)2－12内建模式 (9)品质保证 (10)1 系统简介1－1 特点●可输出3个控制回路●模块化设计、维护更加容易●可接收标准DMX512讯号控制●LED显示接口，操作更加简单●可接受红外线遥控面板控制●可接受ECP系列面板控制1－2 规格●电源供应：12 - 28V DC●输出规格：每回路可输出5A●数字信号输入：DMX-512●传输速率：250K bps●数字信号连接头：3PIN绿色端子●外观尺寸：234 ( W ) X 75 ( H ) X 40 ( D ) mm●重量：0.4 kg●保险丝说明：PCB板号RD22A1 F4,F5(自復式保险丝0.1A 60V)F1-F3(管状保险丝6A,250V). 1－3 操作面板功能简介2 系统操作说明2－1 内建模式的设定与呼叫按下【MODE 】一次，进入选择内建模式接口，按下【SETUP 】，保存所选内建模式，退回到主画面，机器此时会呼叫出该内建跳机。

注意： LDX-305A 共有39种内建模式，请参考2-12。

2－2 设备区域的设定】两次，则LED 会显示这台机器的区域， 按下【▲】或【▼】修改ZONE 数值，设定完成后，再次按下【MODE 】，保存ZONE 设定并进入回路 设定。

电桥／应变片信号调节器前面板详图。

订购示例： DMD4059, 标准电源，隔离应变片信号调节器。

输出范围：电压（最大10 mA ）： 0-1至0-10 Vdc 双极性电压（最大10 mA ）： ±5或±10 Vdc 电流： 0-2 mA 至 0-25 mA顺从、驱动@ 20 mA: 20V, 1000 Ω驱动，电流输出可选择连接灌电流或拉电流输出线性度，波纹与噪声： 优于量程的 ±0.1%， <10 mV rms 波纹与噪声输出归零和跨距校正（微调）： 使用多圈电位计补偿负载和导线变化，±15%量程调整范围（典型）功能测试按键： 按下后将输出设为测试水平。

可通过多圈电位计调整为0 ~ 100%量程。

出厂默认值为约为量程的50%响应时间： 70 ms （典型）共模抑制： 100 db （最小）隔离： 1200 Vrms （最小），3路隔离，电源至输入、 电源至输出及输入至输出工作温度范围： -10 ~ 60°C (14 ~ 140°F)热稳定性： 每°C 热稳定性优于量程的 ±0.02% 标准电源： 80 ~ 265 Vac, 50/60 Hz 或85 ~ 300 Vdc 低电压选项： 9 ~ 30 Vdc 或10 ~ 32 Vac 功耗： 2 ~ 5 W （取决于称重传感器的数量）安装： 安装到标准35 mm DIN 导轨上环境保护： IP40接线方式： 四个4端子可拆卸型连接器， 最大线缆尺寸为14 AWG 外形尺寸： 22.5（宽）x 117（高）x 122 mm （厚） (0.89 x 4.62 x 4.81")，高度包括连接器的高度重量： 159 g (5.6 oz)。

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目录第一部分 (4)霍尼韦尔智慧楼宇系统架构示意图 (4)霍尼韦尔智慧能源管理解决方案 (6)WEBs N4管理软件 (9)霍尼韦尔智慧触控屏 (13)第二部分 (17)系统控制器 WEB 8000 系列 (17)系统控制器 WEB 8000 VAV 专用系列 (21)边缘数据管理器 (24)增强型可编程通用控制器 (27)可编程通用控制器 (30)可编程通用控制器扩展模块 (33)BACnet 可编程通用 / VAV 控制器 (36)Lonworks 可编程通用 / VAV 控制器 (39)VAV 控制器 (43)BACnet 通用控制器 (46)Sylk TM I/O 扩展模块 (49)MVCweb 控制器 (52)UB系列独立控制器 (55)第三部分 (59)房间温控单元 (59)变风量末端墙装模块 (63)WTS3/6 系列温控器 (65)WTS8/9 系列温控器 (69)WS9 系列墙装模块 (73)建筑网络适配器 (76)智能电表 (78)4Ethernet / LANBACnet MS/TP Modbus RTU LonworksKNXSylk BusLightingModbus TCP BACnet IPBACnet IPAlarm Console clientWEB 8000 Web ControllerWEBStation Supervisor智慧触控屏Sylk I/O ModuleLonworks Spyder边缘数据管理器Spyder Universal ControllerPUC BACnet MS/TP Controller霍尼韦尔智慧楼宇系统架构示意图系统示意图仅用于显示设备在系统中的层次关系以及支持的通讯协议具体配置细节请结合实际项目情况，联系霍尼韦尔技术工程师进行架构设计5ElectricitySubmeterBACnet IPBACnet IPHTTPs , BACnet IP , oBIX , SNMP , …WEBs Enterprise Security WEBs Energy AnalyticsHAQ61增强型 BACnet IP ControllerFCU Wall ModuleVAV Controller EM Bus I/O ModuleSylk Bus Wall Module增强型 BACnet IP ControllerEM Bus6霍尼韦尔智慧能源管理解决方案智能高效，机器自学习功能准确分析，快速发现能耗异常功能全面，基于能耗大数据采集、趋势分析、评估诊断和流程控制的闭环管理功能数据准确，具有180多年计量仪表生产、安装与服务的专业知识灵活易用，云平台或本地部署灵活配置和迁移，操作简便扩展性好通过能源可见性、积极应对能耗异常和提高管理人员参与度，用户可以:★ 避免能耗异常波动★ 确保节能投资的投资回报率(ROI)符合预期★ 提高管理效率和降低运营成本研究显示，更多的企业为合规地实现节省成本、提高效率，越来越关注能源管理系统。

日本岛电FP93可编程PID调节器中文操作说明FP93是日本岛电公司高性能的0.3级可编程PID调节器，它功能完善，性能优良、设计细腻。

具有自由输入，四位超大高亮的字符显示，众多的状态指示。

可带4组曲线最大40段可编程，六组专家PID参数，更高级的区域PID算法。

带手动、停电和故障保护、模拟变送、通讯接口、两路时标输出，I/O接口包括4组DI外部开关、3路继电器和4路OC扩展门共16种和事件。

一． 仪表的显示面板和功能键二．操作流程图说明FP93全部的子窗口和用虚线表示的选件子窗口共95个。

每个窗口采用了编号,例如传感器量程选择窗口[5-5],表示第5窗口群的第5数时，面板SV窗口的小数点闪动，按ENT键确认修改后，小数点灭。

三．简单加热系统定值调节的快速入门设置例1． 定值设置例：仪表选用FP93-8P-90-N1000, K型热偶0.0～800.0℃输入,P型输出接固态继电器。

设定温度为600.0℃,EV1上限绝对值报警值650.0℃,EV2下限绝对值报警值550℃, EV2的报警为上电抑制。

首先按面板RUN/RST（运行/复位键），使仪表进入复位，面板RUN运行灯灭，在[5-5]窗口,将传感器量程代码设定为:05(K型热偶0.0～800.0℃) 。

1)在[5-6]窗口,选择传感器量程的单位C（0.0～800.0℃） 。

2)在[5-12]窗口,将调节输出极性设为:rA 反作用（加热）。

3)在[5-13]窗口,将调节输出的时间比例周期设为:2秒。

4)在[3-1]窗口，设置为ON，定值方式。

5)在[3-2]或[0-0]窗口,按增、减键将SV值设为600.0℃,按ENT键确认。

6)在[5-19]窗口, 将EV1报警方式设为:上限绝对值(HA)。

7)在[5-22]窗口, 将EV2报警方式设为:下限绝对值(LA)。

8)根据要求，在[5-24]窗口,设置下限报警应具有上电抑制功能,设为:2。

10）在[3-4]窗口, 设EV1报警值:650.0℃;在[3-5]设EV2报警值:550.0℃。

DS18B20测量温度范围为-55°C~+125°C，在-10~+85°C范围内,精度为±0.5°C。

DS1822的精度较差为± 2°C 。

现场温度直接以“一线总线”的数字方式传输，大大提高了系统的抗干扰性。

适合于恶劣环境的现场温度测量，如：环境控制、设备或过程控制、测温类消费电子产品等。

与前一代产品不同，新的产品支持3V~5.5V的电压范围，使系统设计更灵活、方便。

而且新一代产品更便宜，体积更小。

DS1820 、DS18B20、DS1822 、一样都支持“一线总线”接口。

DS1822与DS18B20软件兼容，是DS18B20的简化版本。

省略了存储用户定义报警温度、分辨率参数的EEPROM，精度降低为±2°C，适用于对性能要求不高，成本控制严格的应用，是经济型产品。

DS18B20的性能是新一代产品中最好的。

DS18B20内部结构主要由四部分组成：64位光刻ROM、温度传感器、非挥发的温度报警触发器TH和TL、配置寄存器。

DS18B20引脚图1、GND为电源地2、DQ为数字信号输入/输出端3、VDD为外接供电电源输入端（在寄生电源接线方式时接地）。

一、DS18B20温度传感器工作原理（热电阻工作原理）DS18B20温度传感器工作原理框图如图所示：DS18B20温度传感器工作原理框图图中低温度系数晶振的振荡频率受温度影响很小，用于产生固定频率的脉冲信号送给计数器1。

高温度系数晶振随温度变化其振荡频率明显改变，所产生的信号作为计数器2的脉冲输入。

计数器1和温度寄存器被预置在-55℃所对应的一个基数值。

计数器1对低温度系数晶振产生的脉冲信号进行减法计数，当计数器1的预置值减到0时，温度寄存器的值将加1，计数器1的预置将重新被装入，计数器1重新开始对低温度系数晶振产生的脉冲信号进行计数，如此循环直到计数器2计数到0时，停止温度寄存器值的累加，此时温度寄存器中的数值即为所测温度。

General DescriptionThe MAX3969 limiting amplifier with PECL data outputs is ideal for low-cost ATM, Fast Ethernet, FDDI and ESCON fiber optic receivers.The MAX3969 features 1mV P-P input sensitivity and an integrated power detector that senses the input signal power. It provides a received-signal-strength indicator (RSSI), which is an analog indication of the power level.Signal strength is also indicated by the complementary TTL loss-of-signal (LOS) outputs and the PECL signal-detect (SD) output, both of which indicate the power level relative to a programmable threshold.The threshold can be adjusted to detect signal ampli-tudes as low as 2.7mV P-P . An optional squelch function disables switching of the data outputs by holding them at a known state when the signal is below the pro-grammed threshold.The MAX3969 is available in die form and a 4mm x 4mm, 20-pin thin QFN package.ApplicationsSFP/SFF TransceiversFast Ethernet/FDDI Transceivers 155Mbps LAN ATM Transceivers ESCON Receivers FTTx TransceiversFeatures♦1mV P-P Input Sensitivity♦Loss-of-Signal Detector with Programmable Threshold ♦TTL LOS and PECL Signal Detect♦Analog Received-Signal-Strength Indicator ♦Output Squelch Function♦Compatible with 4B/5B Data CodingMAX3969200Mbps SFP Limiting Amplifier________________________________________________________________Maxim Integrated Products1Ordering InformationTypical Application CircuitsFor pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .temperature (T J ) range, but are tested and guaranteed only at T A = +25°C.Typical Application Circuits continued at end of data sheet.Pin Configuration appears at end of data sheet.M A X 3969200Mbps SFP Limiting Amplifier 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Power-Supply Voltage Range (V CC , V CCO )..........-0.5V to +7.0V Voltage at FILTER, RSSI, IN+, IN-, CZP, CZN, SQUELCH,INV, V TH ..................................................-0.5V to (V CC + 0.5V)TTL Output Current (LOS, LOS ).........................................±9mA PECL Output Current (OUT+, OUT-, SD).........................±50mA Differential Voltage Between CZP and CZN..........-1.5V to +1.5V Differential Voltage Between IN+ and IN-.............-1.5V to +1.5VContinuous Power Dissipation (T A = +85°C)20-Pin Thin QFN (derate 16.9mW/°C above +85°C)....1099mW Operating Junction Temperature Range (die).....-40°C to +150°C Die Attach Temperature...................................................+400°C Storage Temperature Range.............................-50°C to +150°C Lead Temperature (soldering, 10s).................................+300°CELECTRICAL CHARACTERISTICS(V CC = +2.97V to +5.5V, PECL outputs terminated with 50Ωto V CC - 2V, R1 = 100k Ω, T A = -40°C to +85°C, unless otherwise noted.Typical values are at V CC = +3.3V, T A = +25°C.) (Note 1)LOS-DEASSERT LOS-ASSERT Note 3:Relative to supply voltage (V CCO ).Note 4:AC characteristics are guaranteed by design and characterization.Note 5:Input < LOS threshold (LOS = HIGH), V LOS = 2.4V.Note 6:Pulse-width distortion = [(width of wider pulse) - (width of narrower pulse)] / 2, measured with 100Mbps 1-0 pattern.MAX3969200Mbps SFP Limiting Amplifier_______________________________________________________________________________________3Typical Operating Characteristics(V CC = +3.3V, PECL outputs terminated with 50Ωto V CC - 2V, R1 = 100k Ω, T A = +25°C, unless otherwise noted.)SUPPLY CURRENT vs. TEMPERATURE(PECL OUTPUTS OPEN)AMBIENT TEMPERATURE (°C)S U P P L Y C U R R E N T (m A )603510-15510152025303540455055600-40851ns/divOUTPUT EYE DIAGRAM(V IN = 2mV P-P , 155Mbps, 223 - 1 PRBS)200mV/div MAX3969 toc021ns/divOUTPUT EYE DIAGRAM(V IN = 1500mV P-P , 155Mbps, 223 - 1 PRBS)200mV/divMAX3969 toc03TRANSFER FUNCTIONM A X 3969 t o c 04DIFFERENTIAL INPUT VOLTAGE (mV P-P )D I F FE R E N T I A L O U T P U T V O L T A G E (m V P -P )10001001010.1800100012001400160018006000.0110,000BIT ERROR RATIO vs. DIFFERENTIALINPUT VOLTAGEDIFFERENTIAL INPUT VOLTAGE (mV P-P )B I T E R R O R R A T I O0.410-03010-0410-0510-0610-0710-0810-0910-1010-1110-120.10.20.30.50.60.70.8RSSI VOLTAGE vs. DIFFERENTIALINPUT VOLTAGEDIFFERENTIAL INPUT VOLTAGE (mV P-P )V R S S I (V )100101.201.401.601.802.002.202.402.602.803.001.00110001.41.61.51.91.81.72.22.12.02.3-4020-20406080100RSSI VOLTAGE vs. TEMPERATURE (LOS LOW, RSSI LOAD > 10k Ω)AMBIENT TEMPERATURE (°C)V R S S I (V )POWER-DETECT THRESHOLD vs. R2(R1 = 100k Ω)R2 (k Ω)D I F FE R E N T I A L I N P U T V O L T A G E (m V P -P )1101009080706050403020101001000110120032145678910-4010-15356085LOSS-OF-SIGNAL HYSTERESISvs. TEMPERATUREAMBIENT TEMPERATURE (°C)20l o g (V D E A S S E R T / V A S S E R T ) (d B )M A X 3969200Mbps SFP Limiting Amplifier10μs/div POWER-DETECT TIMING WITH SQUELCH (INPUT = 12mV P-P , C FILTER = 0.01μF,R2 = 15k Ω, 155Mbps, 223 - 1 PRBS)INMAX3969 toc10OUTLOSSDPULSE-WIDTH DISTORTION vs. DIFFERENTIAL INPUT VOLTAGEDIFFERENTIAL INPUT VOLTAGE (mV P-P )P U L S E -W I D T H D I S T O R T I O N (p s )1000100101020304050607080901000110,00000.20.40.60.81.01.21.41.6-40-1510356085DATA OUTPUT TRANSITION TIMEvs. TEMPERATUREM A X 3969 t o c 12AMBIENT TEMPERATURE (°C)T R A N S I T I O N T I M E (n s )Typical Operating Characteristics (continued)(V CC = +3.3V, PECL outputs terminated with 50Ωto V CC - 2V, R1 = 100k Ω, T A = +25°C, unless otherwise noted.)MAX3969200Mbps SFP Limiting Amplifier_______________________________________________________________________________________5Pin DescriptionFigure 1. Functional DiagramDetailed DescriptionThe MAX3969 contains a series of limiting amplifiers and power detectors, offset correction, data-squelch circuitry, TTL buffers for LOS outputs, and PECL output buffers for signal detect (SD) and data outputs. See Figure 1 for the functional diagram.Gain Stages and Offset CorrectionA cascade of limiting amplifiers provides approximately 65dB of combined small-signal gain. The large gain makes the amplifier susceptible to small DC offsets in the signal path. To correct DC offsets, the amplifier has an internal feedback loop that acts as a DC autozerocircuit. By correcting the DC offsets, the limiting amplifi-er sensitivity and power-detector accuracy are improved.The offset correction is optimized for data streams with a 50% duty cycle. A different average duty cycle results in increased pulse-width distortion and loss of sensitivi-ty. The offset-correction circuitry is less sensitive to vari-ations of input duty cycle (for example, the 40% to 60%duty cycle encountered in 4B/5B coding) when the input is less than 30mV P-P .The data inputs must be AC-coupled for the offset cor-rection loop to function properly. Differential input impedance is >5k Ω.M A X 3969Power DetectorEach amplifier stage contains a logarithmic FWD, which indicates the RMS input signal power. The FWD outputs are summed together at the FILTER pin where the sig-nal is filtered by an external capacitor (C FILTER ) con-nected between FILTER and V CC . The FILTER signal generates the RSSI output voltage (V RSSI ), which is proportional to the input power in decibels. When LOS is low, V RSSI is approximated by the following equation:V RSSI (V) = 1.2V + 0.5log (V IN )where, V IN is the data input voltage measured in mV P-P .This relation translates to a 25mV increase in V RSSI for every 1dB increase in V IN . The RSSI output is reduced approximately 120mV when LOS is high.Typically the RSSI output is connected to an A/D con-verter for diagnostic monitoring. This output can be left open if not required in the application. The RSSI output is designed to drive a minimum load resistance of 10k Ωto ground, and a maximum capacitance of 10pF. A 10k Ωseries resistor is required to buffer loads greater than 10pF.Signal-Strength ComparatorA comparator is used to indicate the input signal strength relative to a user-programmable threshold.One of the comparator inputs is connected to the RSSI output signal, and the other is connected to the thresh-old voltage (V TH ), which is set externally and provides a trip point for signal-strength indication. When the sig-nal strength is above the threshold, the SD output asserts high and the LOS output deasserts low.Likewise, when the signal strength falls below the threshold, SD deasserts low and LOS asserts high. To ensure chatter-free operation, the comparator is designed with approximately 5dB of hysteresis.SquelchThe squelch function disables the data outputs by forc-ing OUT- low and OUT+ high when the input signal is below the programmed threshold. This function ensures that when there is a loss of signal, the limiting amplifier and all downstream devices do not respond to input noise. Connect SQUELCH to GND or leave it unconnected to disable squelch. Connect SQUELCH to V CC to enable squelch.PECL OutputsThe data outputs (OUT+, OUT-) and signal-detect out-put (SD) are supply-referenced PECL outputs. See Figure 2 for the equivalent output circuit.Both data outputs must be terminated for proper opera-tion, but the SD output can be left open if not required in the application. The proper termination for a PECL output is 50Ωto (V CC - 2V), but other standard termina-tion techniques can be used. For more information on PECL terminations and how to interface with other logic families, refer to Maxim Application Note HFAN-01.0:Introduction to LVDS, PECL, and CML.TTL OutputsThe LOS outputs (LOS, LOS ) are implemented with open-collector, Schottky-clamped, ESD-protected, TTL-compatible outputs. See Figure 3 for the equivalent out-put circuit. The LOS outputs require external pullup resistors for proper operation. Resistor values between 4.7k Ωand 10k Ωare recommended.If the LOS outputs are not required for the application,they can be left open.Design ProcedureProgram the Power-Detect ThresholdThe suggested procedure for setting the power-detect threshold is given below and is illustrated in Figure 4.1)Determine the maximum receiver sensitivity(RX_MAX) in dBm and the PIN-TIA responsivity (G)in V/W.2)Calculate the differential voltage swing (VIN_SEN) atthe MAX3969 inputs while operating at sensitivity.V IN_SEN = 10(RX_MAX / 10)x 2 x G3)Calculate the threshold voltage (V IN_TH ) at whichLOS must be low (SD must be high) by allowing 3.6dB (1.8dB optical) margin for power-detector accuracy.V IN_TH = V IN_SEN x 0.664)Use V IN_TH and the line labeled (SD H IGH / LOSLOW) in the Power-Detect Threshold vs. R2 graph in the Typical O perating Characteristics to deter-mine the value of R2. Select R1=100k Ω.200Mbps SFP Limiting Amplifier 6_______________________________________________________________________________________Select C FILTERFor SFP/SFF, FDDI, 155Mbps ATM LAN, Fast Ethernet,and ESCON receivers, Maxim recommends C FILTER =0.01µF. This capacitor value ensures chatter-free LOS/SD and provides a typical assert/deassert time of 10µs. For other applications, the value of C FILTER can be calculated using the following equation:C FILTER = τ/ 825Ωwhere τis the desired time constant of the power detector.Select C AZ and C INExternal-coupling capacitors (C IN ) are required on the data inputs for the offset correction loop to function properly. The offset correction loop bandwidth is deter-mined by the external capacitor (C AZ ) connected between CZP and CZN. The poles associated with C IN and C AZ must work together to provide a flat response at the lower -3dB corner frequency. For SFP/SFF, FDDI,155Mbps ATM LAN, Fast Ethernet, and ESCON receivers, Maxim recommends the following:C IN = 4700pF C AZ = 1µFMAX3969200Mbps SFP Limiting Amplifier_______________________________________________________________________________________7Figure 2. Equivalent PECL Output CircuitFigure 3. Equivalent TTL Output CircuitFigure 4. Signal Levels for Power-Detect ThresholdM A X 3969Applications InformationWire BondingFor high-current density and reliable operation, the MAX3969 uses gold metalization. For best results, use gold-wire ball-bonding techniques. Use caution if attempting wedge bonding. Die pad size is 4 mils x 4mils. Die thickness is 16 mils.Table 1 lists the bond pad coordinates for the MAX3969.The origin for pad coordinates is defined as the bottom left corner of the bottom left pad. All pad locations are referenced from the origin and indicate the center of the pad where the bond wire should be connected. Refer to Maxim Application Note H FAN-08.0.1: Understanding Bonding-Coordinates and Physical Die Size for detailed information.200Mbps SFP Limiting Amplifier 8_______________________________________________________________________________________Pin ConfigurationChip InformationTRANSISTOR COUNT: 915SUBSTRATE CONNECTED TO GND PROCESS: Silicon Bipolar DIE THICKNESS: 16 milsMAX3969200Mbps SFP Limiting Amplifier_______________________________________________________________________________________9Chip TopographyM A X 3969200Mbps SFP Limiting Amplifier 10______________________________________________________________________________________Typical Application Circuits (continued)MAX3969200Mbps SFP Limiting AmplifierMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________11©2006 Maxim Integrated Products Printed USAis a registered trademark of Maxim Integrated Products, Inc.Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to /packages.)。