模拟开关： DG417的导通电阻

简 介我们根据要求需要根据给定的内容生成≤150字的文章。内容是关于模拟开关DG417的测试包括导通电阻特性、与工作电压的关系、信号幅度限制等。要简洁涵盖主要发现。注意字数限制。本文测试模拟开关DG417的导通电阻特性随工作电压从±4.5V升至±16V导通电阻由53.4Ω降至30.2Ω低于±4.1V时开关断开。输入端存在钳位二极管信号幅度被限制在工作电源范围内。关键词DG417导通电阻模拟开关 DG417DG417 Datasheet**AD\Test\2026\September\TestDG417.PcbDoc ***AD\Test\2026\September\TestDG417Voltage.SchDoc01【模拟门DG417】一、导通电阻昨天测试了模拟开关集成芯片DG417的基本功能 通过制作的测试电路板 测试了它对于正负交流信号开关的能力 当它的控制端接低电平时 开关导通接高电平时开关断开。 下面我们使用万用表测试一下它在导通过程中 模拟门的导通电阻是多少 另外也测量一下这个导通电阻是否随着它的工作电压的变化而变化的情况。 现在它的工作电压为±12伏 数字万用表显示它的导电阻为25欧姆左右。 根据它的数据手册表明每个 DG417对应的导线组数量都非常接近 误差不超过三欧姆 下面我们再制作一个测试电路板 测试一下它的导通电阻 随着工作电压的变化的情况。二、电压与电阻重新设计测试电路这一次DG417的所有工作电源正负模拟门电源以及5伏的逻辑电源 都由外部的私信端口来提供 这样我们可以简化电路板的绘制和焊接的工作 并且通过这样的控制 我们也可以通过可编程电源DH1766来设定它的模拟门的工作电源 进而我们可以测量在不同的模拟工作电源下 它的模拟开关的导通电阻 下面我们来铺设PCB 适合一分钟制板一分钟之后得到测试电路板 焊接电路板使用高压水蒸气进行清洗 接下来我们给它提供±6伏的工作电源 测量它的模拟开关的导通电阻 并且通过编程测量它的导通电阻在不同的工作电源下对应的情况。给电路板提供工作电源 从±6伏到±12伏 可以看到对应的模拟开关导电阻随着工作电压上升而单调下降。 在±6伏时导通电阻大约为44.5欧姆。 在工作电源±12伏下 导通电阻大约为33.5欧姆。扩大电源电压变化范围 这一次从±4.5伏变化到±16伏 电阻从53.4欧姆。 逐步下降到30.2欧姆。 继续扩大模拟门工作电压范围 可以看到当电压小于±4.1伏之后 模拟开关基本上是断开的 只有当模拟开关工作电压大于±4.2伏之后 导通电阻才从50多欧姆逐步下降到30欧姆左右。三、信号的幅度给模拟开关DG417提供±12伏的工作电源 收入。一个±10伏的1千赫兹的正弦波 输出也是同样的正弦波 将DG417的工作电源降低到±6伏 我们可以看到它的输出、输入都被限幅了。 现伏的最高电压大约7伏左右 这说明在DG417输入端 有对输入信号进行限幅的钳位二极管。※总结 ※本文测试了模拟开关DG417的导通电阻特性 随着模拟门工作电压的增加 开关的导电阻会从50多欧姆降低到30欧姆左右。 在模拟门的输入端有。 钳位二极管输入信号的正负幅值 会被输入端的钳位二极管限制在工作电源的范围之内。一、附件#!/usr/local/bin/python# -*- coding: gbk -*-## TEST1.PY -- by Dr. ZhuoQing 2026-09-02## Note:#fromheadmimport*fromtsmodule.tsvisaimport*vdimlinspace(8.3,32,100)rdim[]dm3068open()forvinvdim:dh1766volt1(v)time.sleep(1)rdm3068res()rdim.append(r)tspsave(voltres1,vdimvdim,rdimrdim)printff(v,r)#------------------------------------------------------------plt.plot(vdim,rdim,lw3)plt.xlabel(Votlage(2x),colorsteelblue,fontsize24)plt.ylabel(Resistor(Ohm),colorsteelblue,fontsize24)plt.grid(True,whichboth,linestyle--,alpha0.7)plt.tight_layout()plt.show()#------------------------------------------------------------#------------------------------------------------------------# END OF FILE : TEST1.PY#vdim[12.0000,12.1212,12.2424,12.3636,12.4848,12.6061,12.7273,12.8485,12.9697,13.0909,13.2121,13.3333,13.4545,13.5758,13.6970,13.8182,13.9394,14.0606,14.1818,14.3030,14.4242,14.5455,14.6667,14.7879,14.9091,15.0303,15.1515,15.2727,15.3939,15.5152,15.6364,15.7576,15.8788,16.0000,16.1212,16.2424,16.3636,16.4848,16.6061,16.7273,16.8485,16.9697,17.0909,17.2121,17.3333,17.4545,17.5758,17.6970,17.8182,17.9394,18.0606,18.1818,18.3030,18.4242,18.5455,18.6667,18.7879,18.9091,19.0303,19.1515,19.2727,19.3939,19.5152,19.6364,19.7576,19.8788,20.0000,20.1212,20.2424,20.3636,20.4848,20.6061,20.7273,20.8485,20.9697,21.0909,21.2121,21.3333,21.4545,21.5758,21.6970,21.8182,21.9394,22.0606,22.1818,22.3030,22.4242,22.5455,22.6667,22.7879,22.9091,23.0303,23.1515,23.2727,23.3939,23.5152,23.6364,23.7576,23.8788,24.0000]rdim[44.4671,44.2234,43.9882,43.7581,43.5284,43.3084,43.0887,42.8743,42.6649,42.4600,42.2622,42.0635,41.8703,41.6825,41.4933,41.3168,41.1477,40.9736,40.8040,40.6363,40.4728,40.3081,40.1503,39.9970,39.8451,39.6963,39.5520,39.4110,39.2678,39.1293,38.9923,38.8589,38.7278,38.5951,38.4677,38.3405,38.2177,38.0983,37.9763,37.8579,37.7436,37.6303,37.5193,37.4080,37.3007,37.1947,37.0907,36.9867,36.8798,36.7832,36.6843,36.5851,36.4867,36.3913,36.2995,36.2061,36.1126,36.0240,35.9361,35.8470,35.7619,35.6752,35.5907,35.5057,35.4228,35.3433,35.2653,35.1860,35.1079,35.0339,34.9572,34.8816,34.8085,34.7361,34.6617,34.5902,34.5163,34.4476,34.3767,34.3094,34.2409,34.1769,34.1098,34.0449,33.9814,33.9178,33.8561,33.7937,33.7327,33.6726,33.6141,33.5567,33.4984,33.4369,33.3774,33.3174,33.2626,33.2083,33.1525,33.0953]vdim[8.3000,8.5394,8.7788,9.0182,9.2576,9.4970,9.7364,9.9758,10.2152,10.4545,10.6939,10.9333,11.1727,11.4121,11.6515,11.8909,12.1303,12.3697,12.6091,12.8485,13.0879,13.3273,13.5667,13.8061,14.0455,14.2848,14.5242,14.7636,15.0030,15.2424,15.4818,15.7212,15.9606,16.2000,16.4394,16.6788,16.9182,17.1576,17.3970,17.6364,17.8758,18.1152,18.3545,18.5939,18.8333,19.0727,19.3121,19.5515,19.7909,20.0303,20.2697,20.5091,20.7485,20.9879,21.2273,21.4667,21.7061,21.9455,22.1848,22.4242,22.6636,22.9030,23.1424,23.3818,23.6212,23.8606,24.1000,24.3394,24.5788,24.8182,25.0576,25.2970,25.5364,25.7758,26.0152,26.2545,26.4939,26.7333,26.9727,27.2121,27.4515,27.6909,27.9303,28.1697,28.4091,28.6485,28.8879,29.1273,29.3667,29.6061,29.8455,30.0848,30.3242,30.5636,30.8030,31.0424,31.2818,31.5212,31.7606,32.0000]rdim[62.9022,56.5782,54.7901,53.6631,52.6521,51.7192,50.8443,50.0218,49.2636,48.5415,47.8614,47.2231,46.6110,46.0351,45.4826,44.9709,44.4764,44.0087,43.5591,43.1320,42.7195,42.3291,41.9516,41.5912,41.2471,40.9124,40.5913,40.2800,39.9820,39.6906,39.4197,39.1519,38.8940,38.6416,38.3999,38.1612,37.9354,37.7145,37.5025,37.2947,37.0877,36.8935,36.7019,36.5129,36.3332,36.1556,35.9864,35.8207,35.6604,35.5028,35.3482,35.1978,35.0507,34.9056,34.7641,34.6296,34.4970,34.3656,34.2399,34.1126,33.9910,33.8717,33.7537,33.6380,33.5219,33.4126,33.3020,33.1990,33.0930,32.9921,32.8915,32.7965,32.6994,32.6016,32.5086,32.4174,32.3299,32.2422,32.1557,32.0712,31.9883,31.9081,31.8276,31.7511,31.6713,31.5944,31.5218,31.4484,31.3759,31.3051,31.2329,31.1657,31.0966,31.0295,30.9623,30.8961,30.8317,30.7646,30.7020,30.6425]■ 相关文献链接:模拟开关 DG417-CSDN博客DG417 Datasheet