基准电压模块mc1403
数字电路3位半直流数字电压表
一、课题名称：3½直流数字电压表二、内容摘要：数字电压表是常用的测量仪表之一，与同级别的指针式电压表相比较，使用方便，测量更准确，因此广泛使用。
它由模拟电路和数字电路两部分组成，模拟部分包括转换式输入放大器、基准电压源和A/D转换电路。
数字部分包括计数器、译码驱动显示及逻辑控制。
3½直流数字电压表具有以下7大特点：（1）显示清晰直观，读数准确（2）显示位数本设计中显示的位数为3位（3）高准确度（4）分辨率高（5）测量速率快（6）输入阻抗高（7）集成度高微功耗新型数字电压表采用CMOS 集成电路，整机功耗很低。
三、设计内容及设计要求：1. 了解双积分式A / D转换器的工作原理2. 熟悉位A / D转换器MC14433的性能及其引脚功能3. 掌握用MC14433构成直流数字电压表的方法4. 设计一个具有三位的十进制数字显示电压表四、试验器件清单：1.MC1403基准电源（1个）2.MC14433A/D转换器（1个）3.CD4511译码驱动（1个）4.LED共阴极数码管（4个）5.MC1413（ULN2003）（1个）6.电阻：10K（3个）1K（2个）47K（2个）3K（1个）470K（2个）100Ω（10个）10K的滑动变阻器（2个）7.电容：0.01µF（1个）0.1µF（3个）8.排针若干 9.覆铜板（2个） 10.导线若干 11.电池盒（2个）五、设计的系统方案：根据数字电路课程设计要求，在指定时间内系统的完成电路的设计、组装以及调试。
一、选题，根据数字电路技术基础课本大纲的要求，在网上搜集课题，筛选出能够体现和运用数字电路基本知识点的选题，确定设计方向。
二、根据选题进行思考，找出选题涉及的知识点，根据工作原理和相关专业知识，做到理解透彻，理清设计思路。
三、系统的对选题进行有层次的设计，画出初始电路图，再进一步的改进。
四、根据电路图连线、调试，使电路完成预期的设计要求和功能，并使电路达到最好的运行状态。
MC14433 CD4511 MC1413 MC1403 应用数字电压表电路图-中文资料-引脚功能--管脚说明-数显电压
MC14433 CD4511 MC1413 MC1403 应用数字电压表电路图-中文资料-引脚功能--管脚说明-数显电压数字显示电压表将被测模拟量转换为数字量，并进行实时数字显示。
该系统（如图1 所示）可采用MC14433—位A/D 转换器、MC1413七路达林顿驱动器阵列、CD4511 BCD到七段锁存-译码-驱动器、能隙基准电源MC1403和共阴极LED发光数码管组成。
本系统是位数字电压表, 位是指十进制数0000～1999。
所谓3位是指个位、十位、百位，其数字范围均为0～9，而所谓半位是指千位数，它不能从0变化到9，而只能由0变到l，即二值状态，所以称为半位。
各部分的功能如下：位A／D转换器(MC14433)：将输入的模拟信号转换成数字信号。
基准电源(MC1403)：提供精密电压，供A／D 转换器作参考电压。
译码器(MC4511)：将二—十进制(BCD)码转换成七段信号。
驱动器(MC1413)：驱动显示器的a，b，c，d，e，f，g七个发光段，驱动发光数码管(LED)进行显示。
显示器：将译码器输出的七段信号进行数字显示，读出A／D转换结果。
工作过程如下：位数字电压表通过位选信号DS1～DS4进行动态扫描显示，由于MC14433电路的A／D转换结果是采用BCD码多路调制方法输出，只要配上一块译码器，就可以将转换结果以数字方式实现四位数字的LED发光数码管动态扫描显示。
DS1～DS4输出多路调制选通脉冲信号。
DS选通脉冲为高电平时表示对应的数位被选通，此时该位数据在Q0～Q3端输出。
每个DS选通脉冲高电平宽度为18个时钟脉冲周期，两个相邻选通脉冲之间间隔2个时钟脉冲周期。
DS和EOC 的时序关系是在EOC 脉冲结束后，紧接着是DS1输出正脉冲。
以下依次为DS2，DS3和DS4。
其中DS1对应最高位(MSD)，DS4则对应最低位(LSD)。
在对应DS2，DS3和DS4选通期间，Q0～Q3输出BCD全位数据，即以8421码方式输出对应的数字0～9．在DS1选通期间，Q0～Q3输出千位的半位数0或l及过量程、欠量程和极性标志信号。
带隙基准
Key words: Bandgap Reference; Layout; Power Supply Rejection Ratio; Temperature Coefficient
III
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第1章 1.1
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绪论············································································ 1 带隙基准源概述······························································1 1.1.1 1.1.2 带隙基准源的研究现状········································· 1 研究目的及意义···········································设计········································· 17 3.2.1 3.2.2 3.2.3 3.2.4 3.2.5 设计指标·························································· 17 带隙基准源架构·················································17 核心电路设计···················································· 20 运放设计·························································· 22 偏置电路设计···················································· 23
高精度智能电阻测量仪课程设计
电子线路课程设计报告设计课题：高精度智能电阻测量设计时间：2015年3月9日—2015年5月15日高精度智能电阻测量仪一．设计任务与设计指标要求设计说明：电阻是常用的电子元件，某些材料的直流电阻需要精确的测量。
利用欧姆定律设计一台电阻测量仪，显示被测量材料的直流电阻阻值。
基本部分1、测量电阻范围：2～20欧姆，20～200欧姆，200～2K，2K～20K，用按钮切换量程。
2、测量精度：1%3、要求测量结果显示稳定3位有效数字（可用数字万用表的电压档当作显示终端）发挥部分1、测量电阻范围：可测量最小1欧姆的电阻2、测量精度：0.5%3、要求测量结果显示稳定4位有效数字二．元器件清单元件类型型号主要参数数量备注基准稳压源TL431稳压值Uz=2.5V1个负载电流1—100mA集成运放LM358单电源（3—30V）1个偏置电流为45nA 限流电阻R12KΩ1个滑线变阻器1R2最大阻值为50KΩ1个滑线变阻器2R3最大阻值为10KΩ1个滑线变阻器3R4最大阻值为500Ω1个滑线变阻器4R5最大阻值为100Ω1个滑线变阻器5R6最大阻值为1KΩ1个定值电阻R7、R8470KΩ2个定值电阻R9—R12510Ω4个定值电组R13—R191KΩ7个电容C1、C20.1uF2个PNP三极管85501个用于恒流源NPN三极管80504个做驱动A/D转换芯片MC14433电源电压为±4.8V—±8V1片基准源MC1403输出电压值：2.475V～2.525V1片译码驱动器HEF4511BP 电源电压范围：5—15V1片译码驱动四位一体共阴数码管ARKSR420561N1个拨码开关S1—S44个导线电路板三．系统总体框图我们所设计的智能电阻测量仪主要由四个部分组成：集成运放芯片LM358及可控精密稳压源TL431构成了恒流源部分，高精度A/D转换芯片MC14433及基准电压源MC1403构成了电压采样转换部分，译码驱动器CD4511及以四个三极管组成的位驱动阵列形成了译码驱动部分，四位一体共阴数码管构成了显示部分。
MC1403, B 低压基准电压参考器 说明书
MC1403, BLow Voltage ReferenceA precision band−gap voltage reference designed for critical instrumentation and D/A converter applications. This unit is designed to work with D/A converters, up to 12 bits in accuracy, or as a reference for power supply applications.•Output V oltage: 2.5 V "25 mV•Input V oltage Range: 4.5 V to 40 V•Quiescent Current: 1.2 mA Typical•Output Current: 10 mA•Temperature Coefficient: 10 ppm/°C Typical •Guaranteed Temperature Drift Specification•Equivalent to AD580•Standard 8−Pin DIP, and 8−Pin SOIC PackageTypical Applications•V oltage Reference for 8 to 12 Bit D/A Converters•Low T C Zener Replacement•High Stability Current Reference•V oltmeter System Reference•Pb−Free Package is AvailableMAXIMUM RATINGS (T= 25°C, unless otherwise noted.)Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur andreliability may be affected.See detailed ordering and shipping information in the package dimensions section on page 6 of this data sheet.ORDERING INFORMATIONFigure 1. A Reference for Monolithic D/A Converters+5.0 VProviding the Reference Currentfor ON Semiconductor Monolithic D/A Converters The MC1403 makes an ideal reference for many mono-lithic D/A converters, requiring a stable current reference of nominally 2.0 mA. This can be easily obtained from the MC1403 with the addition of a series resistor, R1. A variable resistor, R2, is recommended to provide means for full−scale adjust on the D/A converter.The resistor R3 improves temperature performance by matching the impedance on both inputs of the D/A reference amplifier. The capacitor decouples any noise present on the reference line. It is essential if the D/A converter is located any appreciable distance from the reference.A single MC1403 reference can provide the required current input for up to five of the monolithic D/A converters.*Guaranteed but not tested.This device contains 15 active transistors.Figure 2. MC1403, B SchematicT A , TEMPERATURE (°C)Figure 3. Typical Change in V out versus V in(Normalized to V in = 15 V @ T C = 25°C)Figure 4. Change in Output Voltageversus Load Current(Normalized to V out @ V in = 15 V, I out = 0 mA)V in , INPUT VOLTAGE (V)2.01.0−1.0−2.0−3.0−4.0−5.0−6.01020304050V , C H A N G E I N V o u t (m V )∆o u t I out , OUTPUT CURRENT (mA)∆V o u t , C H A N G E I N O U T P U T V O L T A G E (m V )109.08.07.06.05.04.03.02.01.001.02.03.04.05.06.07.08.09.010I 1, Q U I E S C E N T C U R R E N T (m A )Figure 7. Change in V out versus Temperature(Normalized to T A = 25°C, V in = 15 V, I out = 0 mA)3−1/2−Digit Voltmeter − Common Anode Displays, Flashing OverrangeAn example of a 3−1/2−digit voltmeter using the MC14433 is shown in the circuit diagram of Figure 8. The reference voltage for the system uses an MC1403 2.5 V reference IC. The full scale potentiometer can calibrate for a full scale of 199.9 mV or 1.999 V . When switching from 2.0 V to 200 mV operation, R I is also changed, as shown on the diagram.When using R C equal to 300 k W , the clock frequency for the system is about 66 kHz. The resulting conversion time is approximately 250 ms.When the input is overrange, the display flashes on and off. The flashing rate is one−half the conversion rate. Thisis done by dividing the EOC pulse rate by 2 with 1/2MC14013B flip−flop and blanking the display using the blanking input of the MC14543B.The display uses an LED display with common anode digit lines driven with an MC14543B decoder and an MC1413 LED driver. The MC1413 contains 7 Darlington transistor drivers and resistors to drive the segments of the display. The digit drive is provided by four MPS−A12Darlington transistors operating in an emitter−follower configuration. The MC14543B, MC14013B and LED displays are referenced to V EE via Pin 13 of the MC14433.This places the full power supply voltage across the display.The current for the display may be adjusted by the value of the segment resistors shown as 150 W in Figure 8.Figure 8. 3−1/2−Digit Voltmeter0.1 VORDERING INFORMATIONSpecifications Brochure, BRD8011/D.PDIP −8CASE 626−05ISSUE PDATE 22 APR 2015SCALE 1:1NOTE 8XXXXXXXXXAWL YYWWGGENERICMARKING DIAGRAM*XXXX = Specific Device Code A = Assembly Location WL = Wafer Lot YY = YearWW = Work WeekG = Pb −Free Package*This information is generic. Please refer to device data sheet for actual part marking.Pb −Free indicator, “G” or microdot “ G ”,may or may not be present.WITH LEADS CONSTRAINEDDIM MIN MAX INCHES A −−−−0.210A10.015−−−−b 0.0140.022C 0.0080.014D 0.3550.400D10.005−−−−e 0.100 BSC E 0.3000.325M−−−−10−−− 5.330.38−−−0.350.560.200.369.0210.160.13−−−2.54 BSC 7.628.26−−−10MIN MAX MILLIMETERSNOTES:1.DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994.2.CONTROLLING DIMENSION: INCHES.3.DIMENSIONS A, A1 AND L ARE MEASURED WITH THE PACK-AGE SEATED IN JEDEC SEATING PLANE GAUGE GS −3.4.DIMENSIONS D, D1 AND E1 DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS ARE NOT TO EXCEED 0.10 INCH.5.DIMENSION E IS MEASURED AT A POINT 0.015 BELOW DATUM PLANE H WITH THE LEADS CONSTRAINED PERPENDICULAR TO DATUM C.6.DIMENSION eB IS MEASURED AT THE LEAD TIPS WITH THE LEADS UNCONSTRAINED.7.DATUM PLANE H IS COINCIDENT WITH THE BOTTOM OF THE LEADS, WHERE THE LEADS EXIT THE BODY .8.PACKAGE CONTOUR IS OPTIONAL (ROUNDED OR SQUARE CORNERS).E10.2400.280 6.107.11b2eB −−−−0.430−−−10.920.060 TYP 1.52 TYP cA20.1150.195 2.92 4.95L 0.1150.150 2.92 3.81°°NOTE 5STYLE 1:PIN 1.AC IN2.DC + IN3.DC − IN4.AC IN5.GROUND6.OUTPUT7.AUXILIARY8.V CCSOIC −8 NB CASE 751−07ISSUE AKDATE 16 FEB 2011NOTES:1.DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.2.CONTROLLING DIMENSION: MILLIMETER.3.DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION.4.MAXIMUM MOLD PROTRUSION 0.15 (0.006)PER SIDE.5.DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBARPROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION.6.751−01 THRU 751−06 ARE OBSOLETE. NEW STANDARD IS 751−07.SCALE 1:1STYLES ON PAGE 2DIM A MIN MAX MIN MAX INCHES4.805.000.1890.197MILLIMETERSB 3.80 4.000.1500.157C 1.35 1.750.0530.069D 0.330.510.0130.020G 1.27 BSC 0.050 BSC H 0.100.250.0040.010J 0.190.250.0070.010K 0.40 1.270.0160.050M 0 8 0 8 N 0.250.500.0100.020S5.806.200.2280.244MYM0.25 (0.010)YM0.25 (0.010)Z SXS____XXXXX = Specific Device Code A = Assembly Location L = Wafer Lot Y = YearW = Work WeekG = Pb −Free PackageGENERICMARKING DIAGRAM*8ICDiscrete 0.60.024ǒmm inchesǓSCALE 6:1*For additional information on our Pb −Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.SOLDERING FOOTPRINT*Discrete(Pb −Free)IC (Pb −Free)XXXXXX = Specific Device Code A = Assembly Location Y = Year WW = Work Week G = Pb −Free Package*This information is generic. Please refer todevice data sheet for actual part marking.Pb −Free indicator, “G” or microdot “G ”, may or may not be present. Some products may not follow the Generic Marking.SOIC −8 NB CASE 751−07ISSUE AKDATE 16 FEB 2011STYLE 4:PIN 1.ANODE2.ANODE3.ANODE4.ANODE5.ANODE6.ANODE7.ANODEMON CATHODE STYLE 1:PIN 1.EMITTER2.COLLECTOR3.COLLECTOR4.EMITTER5.EMITTER6.BASE7.BASE8.EMITTER STYLE 2:PIN 1.COLLECTOR, DIE, #12.COLLECTOR, #13.COLLECTOR, #24.COLLECTOR, #25.BASE, #26.EMITTER, #27.BASE, #18.EMITTER, #1STYLE 3:PIN 1.DRAIN, DIE #12.DRAIN, #13.DRAIN, #24.DRAIN, #25.GATE, #26.SOURCE, #27.GATE, #18.SOURCE, #1STYLE 6:PIN 1.SOURCE2.DRAIN3.DRAIN4.SOURCE5.SOURCE6.GATE7.GATE8.SOURCE STYLE 5:PIN 1.DRAIN2.DRAIN3.DRAIN4.DRAIN5.GATE6.GATE7.SOURCE8.SOURCESTYLE 7:PIN 1.INPUT2.EXTERNAL BYPASS3.THIRD STAGE SOURCE4.GROUND5.DRAIN6.GATE 37.SECOND STAGE Vd 8.FIRST STAGE Vd STYLE 8:PIN 1.COLLECTOR, DIE #12.BASE, #13.BASE, #24.COLLECTOR, #25.COLLECTOR, #26.EMITTER, #27.EMITTER, #18.COLLECTOR, #1STYLE 9:PIN 1.EMITTER, COMMON2.COLLECTOR, DIE #13.COLLECTOR, DIE #24.EMITTER, COMMON5.EMITTER, COMMON6.BASE, DIE #27.BASE, DIE #18.EMITTER, COMMON STYLE 10:PIN 1.GROUND2.BIAS 13.OUTPUT4.GROUND5.GROUND6.BIAS 27.INPUT8.GROUND STYLE 11:PIN 1.SOURCE 12.GATE 13.SOURCE 24.GATE 25.DRAIN 26.DRAIN 27.DRAIN 18.DRAIN 1STYLE 12:PIN 1.SOURCE2.SOURCE3.SOURCE4.GATE5.DRAIN6.DRAIN7.DRAIN8.DRAINSTYLE 14:PIN 1.N −SOURCE2.N −GATE3.P −SOURCE4.P −GATE5.P −DRAIN6.P −DRAIN7.N −DRAIN8.N −DRAIN STYLE 13:PIN 1.N.C.2.SOURCE3.SOURCE4.GATE5.DRAIN6.DRAIN7.DRAIN8.DRAIN STYLE 15:PIN 1.ANODE 12.ANODE 13.ANODE 14.ANODE 15.CATHODE, COMMON6.CATHODE, COMMON7.CATHODE, COMMON8.CATHODE, COMMON STYLE 16:PIN 1.EMITTER, DIE #12.BASE, DIE #13.EMITTER, DIE #24.BASE, DIE #25.COLLECTOR, DIE #26.COLLECTOR, DIE #27.COLLECTOR, DIE #18.COLLECTOR, DIE #1STYLE 17:PIN 1.VCC2.V2OUT3.V1OUT4.TXE5.RXE6.VEE7.GND8.ACCSTYLE 18:PIN 1.ANODE2.ANODE3.SOURCE4.GATE5.DRAIN6.DRAIN7.CATHODE8.CATHODESTYLE 19:PIN 1.SOURCE 12.GATE 13.SOURCE 24.GATE 25.DRAIN 26.MIRROR 27.DRAIN 18.MIRROR 1STYLE 20:PIN 1.SOURCE (N)2.GATE (N)3.SOURCE (P)4.GATE (P)5.DRAIN6.DRAIN7.DRAIN8.DRAIN STYLE 21:PIN 1.CATHODE 12.CATHODE 23.CATHODE 34.CATHODE 45.CATHODE 5MON ANODEMON ANODE8.CATHODE 6STYLE 22:PIN 1.I/O LINE 1MON CATHODE/VCCMON CATHODE/VCC4.I/O LINE 3MON ANODE/GND6.I/O LINE 47.I/O LINE 5MON ANODE/GND STYLE 23:PIN 1.LINE 1 INMON ANODE/GNDMON ANODE/GND4.LINE 2 IN5.LINE 2 OUTMON ANODE/GNDMON ANODE/GND8.LINE 1 OUT STYLE 24:PIN 1.BASE2.EMITTER3.COLLECTOR/ANODE4.COLLECTOR/ANODE5.CATHODE6.CATHODE7.COLLECTOR/ANODE 8.COLLECTOR/ANODE STYLE 25:PIN 1.VIN2.N/C3.REXT4.GND5.IOUT6.IOUT7.IOUT8.IOUTSTYLE 26:PIN 1.GND2.dv/dt3.ENABLE4.ILIMIT5.SOURCE6.SOURCE7.SOURCE8.VCCSTYLE 27:PIN 1.ILIMIT2.OVLO3.UVLO4.INPUT+5.SOURCE6.SOURCE7.SOURCE8.DRAINSTYLE 28:PIN 1.SW_TO_GND2.DASIC_OFF3.DASIC_SW_DET4.GND5.V_MON6.VBULK7.VBULK8.VINSTYLE 29:PIN 1.BASE, DIE #12.EMITTER, #13.BASE, #24.EMITTER, #25.COLLECTOR, #26.COLLECTOR, #27.COLLECTOR, #18.COLLECTOR, #1STYLE 30:PIN 1.DRAIN 12.DRAIN 13.GATE 24.SOURCE 25.SOURCE 1/DRAIN 26.SOURCE 1/DRAIN 27.SOURCE 1/DRAIN 28.GATE 1PUBLICATION ORDERING INFORMATIONTECHNICAL SUPPORTLITERATURE FULFILLMENT:。
数字温度计实验报告
课程授课教案一、实验目的和要求1.掌握集成运算放大器的工作原理及其应用。
2.掌握温度传感器工作原理及其应用电路。
3. 了解双积分式A/D转换器的工作原理。
4. 熟悉213位A/D转换器MC14433的性能及其引脚功能。
5. 熟悉模拟信号采集和输出数据显示的综合设计与调试方法。
6. 进一步练习较复杂电路系统的综合布线和读图能力。
设计要求如下：1. 设计一个数字式温度计，即用数字显示被测温度。
数字式温度计具体要求为：①测量范围为0～100℃②用4位LED数码管显示。
二、主要仪器和设备1.数字示波器2.数字万用表3.电路元器件：温度传感器 LM35 1片集成运算放大器LM741 1片集成稳压器 MC1403 1片A/D转换器 MC14433 1片七路达林顿晶体管列阵 MC1413 1片BCD七段译码／驱动器 CC4511 1片电阻、电容、电位器若干三、实验内容、原理及步骤1.总体方案设计图1为数字温度计的原理框图。
其工作原理是将被测的温度信号通过传感器转换成随温度变化的电压信号，此电压信号经过放大电路后，通过模数转换器把模拟量转变成数字量，最后将数字量送显示电路，用4位LED数码管显示。
图1 数字温度计原理框图2. 温度传感器及其应用电路温度传感器LM35将温度变化转换为电信号，温度每升高一度，大约输出电压升高10mV。
在25摄氏度时，输出约250mV。
图2（a）、(b)图为LM35测温电路。
（a）基本的测温电路(+2°C to +150°C) （b）全量程的测温电路（−55°C to +150°C）图2（a）、(b)图为LM35测温电路LM35系列封装及引脚参见下图 3。
图 3 LM35系列封装及引脚图3.放大电路放大器使用LM 741普通运放,作为实验用数字温度计，可以满足要求；如果作为长期使用的定型产品，可以选用性能更好、温度漂移更小的OP07等型号的产品，引脚与LM741兼容,可以直接替换使用。
简易数字电压表设计报告
摘要--------------------------------------------------------2 1.数字电压表的简介------------------------------------------31.1数字电压表的发展--------------------------------------31.2数字电压表的分类--------------------------------------42.设计的目的------------------------------------------------53.设计的内容及要求------------------------------------------54.数字电压表的基本原理--------------------------------------54.1数字电压表各模块的工作原理----------------------------54.2数字电压表各模块的功能--------------------------------54.3数字电压表的工作过程----------------------------------65.实验器材--------------------------------------------------76.电路设计实施方案------------------------------------------76.1.实验步骤---------------------------------------------76.2各个模块设计------------------------------------------86.2.1 基准电压模块-----------------------------------86.2.2 3 1/2位A/D电路模块---------------------------106.2.3 字形译码驱动电路模块--------------------------126.2.4 显示电路模块----------------------------------136.2.5 字位驱动电路模块------------------------------167.总结-----------------------------------------------------17 参考文件---------------------------------------------------18 附录-------------------------------------------------------19本文介绍了一种简易数字电压表的设计。
电压基准芯片大全
LＭ236D－２-５:2.5V基准电压源4００uＡ~10mA宽工作电流ﻫＬＭ2３6DR-2—５:2、５V基准电压源 4００uA～10ｍA宽工作电流ﻫLM23６LＰ-2—5:2。
5V基准电压源4００uA～10mA宽工作电流LM2８5D－1—2:微功耗电压基准。
10uA～20mA宽工作电流ﻫLM285D－2－5:微功耗电压基准. 10uA～20mＡ宽工作电流ﻫLM２85ＬP—2-５:微功耗电压基准. １0uA~20ｍA宽工作电流ﻫLM３３6BD—2－5:2.5V基准电压源。
10uＡ~20ｍＡ宽工作电流ﻫLM33６ＢLP-2－5:2。
5V基准电压源ﻫLM３８5ＢD—1—2:1.2V精密电压基准、15uＡ~20ｍA宽工作电流ＬM3８5BD-２-５:2。
5Ｖ精密电压基准. 15uA～20mA宽工作电流ﻫLＭ385BLＰ—1—2:1.2Ｖ精密电压基准. 1５uA~20mA宽工作电流ＬM385ＢLＰ—２-5:2。
5Ｖ精密电压基准、 15uA～２0mA宽工作电流ﻫLM385ＢＰW －１—2:微功耗电压基准、15uA~20ｍＡ宽工作电流ﻫＬＭ３85BPW—2-５:微功耗电压基准. 15uＡ～２0mA宽工作电流LM385D－1－2:1.2Ｖ精密电压基准。
15ｕA~2０mA宽工作电流ﻫLM３85DR—1—2:1.2V精密电压基准。
１5uA~２0mA宽工作电流ＬＭ385DR-2－5:2、５V精密电压基准、 15ｕA～20mA宽工作电流ﻫLM38５LＰ－2—５:2、5V精密电压基准. 15uA~20mＡ宽工作电流ﻫLＭ385ＰＷ-1—2:1。
2Ｖ微功率基准电压源、15uA～20mＡ宽工作电流LM385ＰＷ-２-5:2、5Ｖ微功率基准电压源、１5uA~2０ｍA宽工作电流ﻫＲEＦ0２AP:+５Ｖ精密电压基准REF02AU:+5V精密电压基准ﻫREＦ02BＰ:+５V精密电压基准REF02BU:+５V精密电压基准ＲEF1０04Ｉ-2、5:+2、5V精密电压基准REF102AP:10V精密电压基准REF１02AU:１0V精密电压基准ﻫＲEF102BP:10V精密电压基准ﻫREF２00ＡU:双电流基准ﻫRＥF291２AIDＢZT:1、2V电压基准ＲEF２920AＩDBZT:2V电压基准ﻫREＦ２９２５ＡIDBZT:2、5V电压基准ﻫREＦ293０ＡIＤBZT:3Ｖ电压基准ﻫREF2933AIDBZT:３。
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MC1403简介
MC1403是低压基准芯片。
一般用作8～12bit的D/A芯片的基准电压等一些需要基本精准的基准电压的场合。
输出电压: 2.5 V ＋/- 25 mV
输入电压范围: 4.5 V to 40 V
输出电流: 10 mA
芯片引脚图：
.........+--+--+--+
...Vin.|1.+---+.8|.NC
.Vout.|2..........7|.NC
.GND.|3..........6|.NC
....NC.|4..........5|.NC
.........+---------+
因为输出是固定的，所以电路很简单。
就是Vin接电源输入，GND 接底，Vout加一个0.1uf~1uf的电容就可以了。
Vout一般用作8～12bit的D/A芯片的基准电压。
MC1403是美国摩托罗拉公司生产的高准确度、低温漂、采用激光修正的带隙基准电压源，国产型号为5G1403和CH1403。
它采用
DIP－8封装，引脚排列如图7-1-2所示。
UI＝＋4.5V～＋15V，UO ＝2.500V（典型值），αT可达10×10－6/℃。
为了配8P插座，还专门设置了5个空脚。
其输出电压UO＝Ug0(R3＋R4)/R4＝
1.205×
2.08＝＋2.5V。
MC1403的输入-输出特性
输入电压UI／V
10
9
8
7
6
5
4.5
输出电压UO／V
2.5028
2.5028
2.5028
2.5028
2.5028
2.5028
2.5027
当UI从10V降至4.5V时，UO只变化0.0001V，变化率仅为－0.0018％。