電子可變電阻器——AD5272
發(fā)布時(shí)間:2020-04-21 來源:卓晴 責(zé)任編輯:wenwei
【導(dǎo)讀】AD5272是Analog公司的電子可變電阻器。它可以被應(yīng)用在各種電子線路中,進(jìn)行自動(dòng)參數(shù)設(shè)置和調(diào)節(jié)。AD5272是一個(gè)變阻器(rheostat)兩端器件,而不是電位器(Potentiometer:三端器件)。相對于美國Xicor公司的高精度數(shù)字電位器(X9C102,103,104等),它具有變阻級數(shù)高(1024級),工作頻帶等特點(diǎn)。
▲ AD5272數(shù)字變阻器
為了對比在博文“寄生電容[1]”對X9C104的討論,購買了三片樣品進(jìn)行實(shí)驗(yàn)驗(yàn)證。
AD5272簡介
1. 內(nèi)部結(jié)構(gòu)
AD5272是一款MSOP 10管腳封裝的芯片。包括有工作電源、地線,與MCU連接的I2C接口,以及可變電阻的兩端(A-W)。此外還有一些輔助設(shè)置管腳。詳細(xì)介紹可以參見他的數(shù)據(jù)手冊。下面是AD5272的外部管腳以及內(nèi)部結(jié)構(gòu)功能圖。
▲ AD5272內(nèi)部功能圖
從上圖可以看出AD5272對外的應(yīng)用端口只有兩個(gè)(A,W),它是一個(gè)變阻器(Varistor:兩端器件)。
2. 產(chǎn)品特性
● 單通道、1024/256位分辨率
● 標(biāo)稱電阻:20 kΩ、50 kΩ、100 kΩ
● 標(biāo)稱電阻容差誤差:±1%(最大值)
● 50次可編程(50-TP)游標(biāo)存儲器
● 可變電阻器模式下的溫度系數(shù):5 ppm/℃
● 2.7 V至5.5 V單電源供電
● 雙電源供電:±2.5 V至±2.75 V(交流或雙極性工作模式)
3. 測試電路板
為了測試AD5272的性能,快速制作一塊電路板,將其封裝在電路板上,通過100mil的外部引線在面包板上與其它測試電路連接進(jìn)行相關(guān)的測試。
下面是設(shè)計(jì)的測試電路板的原理圖和PCB版圖。
▲ 實(shí)驗(yàn)電路板
測試方案
由于AD5272的控制是通過I2C總線完成的,所以需要借助于一塊MCU完成對AD5272的數(shù)字控制。下面介紹實(shí)驗(yàn)MCU板以及相應(yīng)的軟件開發(fā)。
1. 實(shí)驗(yàn)MCU板
實(shí)驗(yàn)電路板MCU采用STC8G1K08對AD5272進(jìn)行控制。該電路板的詳細(xì)介紹在“基于STC8G1K08的實(shí)驗(yàn)電路板[2]”中展示。
使用PK3端口的pin6(SCL)和pin7(SDA)[I2C總線第四個(gè)輸出備選端口],與 AD5275的PK3的pin4(SCL),pin5(SDA)相連,組成實(shí)驗(yàn)電路。
▲ 8G1K08-SOP16 實(shí)驗(yàn)電路板
實(shí)際連接線路如下圖所示:
▲ 實(shí)驗(yàn)電路引線連接情況
2. 測試軟件
(1) I2C 地址:AD5272的7位地址組成包括兩部分:
前5位位 :01011
最后兩位是由ADDR管腳的電壓確定,具體可以參見下面表格:
(2)相關(guān)子程序:AD5272的功能設(shè)置,可以參見其數(shù)據(jù)手冊中的說明。在CSDN中給出了AD5272接口程序。這些程序上層依賴于STC8G1K08的I2C操作的函數(shù)支持。
測試結(jié)果
將實(shí)驗(yàn)電路板在面包板上連接,進(jìn)行相關(guān)的性能測試。
▲ 通電后,測試面包板電路
1. 測量A-W電阻與設(shè)置參數(shù)之間的關(guān)系
通過軟件設(shè)置AD5272中RDAC的參數(shù)0~1023,每次遞增10,所測量得到的102個(gè)數(shù)據(jù),測量A-W兩端的電阻。實(shí)驗(yàn)數(shù)據(jù)如下:
res=[31.06,195.83,389.87,582.86,786.78,979.69,1173.92,1370.54,1564.31,1756.72,1959.14,2150.80,2342.31,2537.69,2731.21,2923.23,3115.95,3316.69,3506.39,3697.96,3895.03,4088.38,4279.93,4482.23,4672.36,4864.04,5057.67,5251.33,5443.37,5645.82,5836.31,6028.02,6217.46,6411.77,6604.22,6796.99,6997.55,7189.65,7378.69,7569.33,7762.46,7955.59,8156.52,8346.48,8537.97,8723.09,8917.34,9109.66,9302.17,9501.89,9693.09,9871.78,10066.15,10258.58,10450.60,10649.98,10840.70,11027.89,11207.98,11400.64,11592.36,11792.14,11982.23,12169.72,12343.51,12536.54,12726.77,12916.79,13114.53,13303.92,13470.17,13664.16,13855.01,14045.89,14243.87,14432.99,14619.03,14786.59,14978.64,15169.90,15358.20,15556.71,15742.90,15902.01,16094.12,16285.19,16473.98,16670.93,16856.67,17043.42,17202.99,17394.30,17585.01,17773.71,17968.68,18150.75,18303.86,18497.14,18686.51,18873.12,19071.08,19254.32,19397.46]
當(dāng)RDAC=0時(shí),AW電阻為31.06Ω。當(dāng)RDAC=1020時(shí),AW電阻為19397.46Ω。當(dāng)RDAC= 1023時(shí),AW電阻最大,為:19516Ω。
設(shè)置RDAC值與AW電阻之間的曲線為:
▲ AD5272的電阻與設(shè)置RDAC之間的關(guān)系
2. 電阻誤差
分別對設(shè)置為0,511,1023三種情況測量100次電阻。統(tǒng)計(jì)相應(yīng)的均值,標(biāo)準(zhǔn)差。
res0=[30.87,30.86,30.86,30.86,30.85,30.85,30.85,30.85,30.86,30.85,30.86,30.84,30.85,30.84,30.85,30.85,30.85,30.85,30.84,30.85,30.84,30.85,30.84,30.84,30.83,30.84,30.83,30.84,30.83,30.83,30.83,30.84,30.83,30.83,30.83,30.83,30.83,30.83,30.83,30.83,30.83,30.82,30.83,30.83,30.84,30.85,30.83,30.82,30.83,30.83,30.83,30.83,30.84,30.83,30.84,30.83,30.84,30.83,30.84,30.85,30.85,30.85,30.81,30.85,30.85,30.86,30.84,30.84,30.84,30.84,30.83,30.82,30.82,30.82,30.86,30.85,30.82,30.82,30.82,30.82,30.83,30.83,30.82,30.83,30.82,30.82,30.81,30.82,30.81,30.81,30.82,30.81,30.82,30.82,30.82,30.82,30.82,30.82,30.82,30.82]
res511=[9886.59,9885.49,9884.89,9884.65,9884.25,9884.04,9883.44,9883.81,9883.81,9883.98,9883.22,9883.04,9882.73,9882.89,9882.43,9882.25,9882.13,9882.05,9882.12,9882.11,9881.86,9881.92,9881.59,9881.33,9881.01,9881.19,9880.85,9880.63,9880.58,9880.03,9880.37,9880.09,9879.74,9879.86,9879.55,9879.51,9879.57,9879.38,9879.17,9879.23,9879.08,9879.14,9878.99,9879.87,9880.95,9879.46,9879.07,9878.87,9879.52,9879.63,9879.74,9880.59,9878.89,9878.78,9879.26,9879.67,9878.96,9880.50,9879.96,9881.97,9883.24,9880.49,9878.37,9882.40,9878.21,9879.98,9878.29,9881.24,9878.03,9878.41,9877.99,9877.88,9877.75,9882.34,9882.86,9877.51,9877.60,9877.83,9877.64,9877.52,9877.77,9877.57,9877.61,9877.55,9877.38,9877.39,9877.44,9877.50,9877.51,9877.75,9877.60,9877.58,9877.58,9877.56,9877.51,9877.48,9877.47,9877.58,9877.63,9877.56]
res1023=[19474.35,19472.00,19471.12,19468.77,19468.94,19468.57,19469.00,19469.81,19468.81,19470.02,19469.29,19468.49,19467.52,19467.61,19467.82,19466.50,19466.88,19467.17,19467.97,19467.12,19467.38,19467.07,19466.89,19466.63,19466.12,19466.01,19466.00,19465.62,19465.20,19464.87,19465.59,19464.10,19464.87,19464.26,19464.67,19463.29,19464.00,19463.85,19463.87,19464.63,19464.01,19463.51,19464.70,19465.08,19470.97,19464.57,19464.65,19465.02,19466.95,19465.71,19467.71,19471.63,19464.97,19465.42,19468.00,19473.37,19465.89,19470.16,19471.82,19476.47,19480.91,19465.24,19464.30,19472.95,19464.66,19466.91,19464.90,19472.64,19471.20,19466.71,19463.60,19464.15,19463.56,19469.07,19482.30,19463.76,19464.53,19464.39,19464.61,19465.06,19464.63,19464.50,19464.89,19464.03,19464.41,19464.80,19465.25,19464.87,19465.06,19465.52,19465.92,19466.03,19465.40,19466.14,19466.05,19466.48,19466.45,19466.98,19466.42,19466.69]
統(tǒng)計(jì)值如下表所示:
將三個(gè)測量曲線,減去他們的均值之后,繪制出測量誤差波動(dòng)曲線:
3. 電阻的頻率響應(yīng)
(1)測量原理:
使用AD9833模塊產(chǎn)生頻率可變的正弦信號,施加在R1與AD5272的串聯(lián)電路上。測量輸入電壓與分壓電壓之間的比值隨著頻率的改變和變化的情況,反映了AD5272電阻的頻率響應(yīng)特性。
▲ 測量示意圖
(2)交流信號源:信號源使用AD9833 DDS信號源。通過ZIGBEE無線命令設(shè)置它所產(chǎn)生的信號頻率。該模塊的詳細(xì)內(nèi)容參見博文“AD9833數(shù)字信號發(fā)生器模塊[3]”
▲ AD9833數(shù)字合成信號發(fā)生模塊
設(shè)置頻率所使用的命令為:
ad9833setfrequency xxxx
其中xxxx 設(shè)置頻率數(shù)值。
▲ 組裝后的測試電路
(3)測量結(jié)果
在AD5272設(shè)置為511時(shí),測量信號頻率從100Hz到200kHz變化時(shí),輸入信號,輸出信號以及它們的比值隨著頻率的變化的情況。
▲ AD5272設(shè)置為511時(shí),分壓電阻的增益頻率曲線
測量如下:其中包括輸出電壓vout,輸入電壓vin,vout/vin=ratio,以及信號的頻率四組數(shù)據(jù)。
vout=[0.07,0.07,0.07,0.07,0.07,0.07,0.07,0.07,0.07,0.07,0.07,0.07,0.07,0.07,0.07,0.07,0.07,0.07,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.03,0.03,0.03,0.03,0.03,0.03,0.03,0.03,0.03,0.03,0.03,0.03,0.03,0.03,0.03,0.03,0.03,0.03,0.03,0.03]
vin=[0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20]
ratio=[0.34,0.34,0.33,0.33,0.33,0.33,0.33,0.33,0.33,0.33,0.33,0.32,0.32,0.32,0.32,0.32,0.31,0.31,0.31,0.31,0.31,0.30,0.30,0.30,0.29,0.29,0.29,0.29,0.28,0.28,0.28,0.28,0.27,0.27,0.27,0.26,0.26,0.26,0.26,0.25,0.25,0.25,0.25,0.24,0.24,0.24,0.24,0.23,0.23,0.23,0.23,0.22,0.22,0.22,0.22,0.22,0.21,0.21,0.21,0.21,0.21,0.20,0.20,0.20,0.20,0.20,0.20,0.19,0.19,0.19,0.19,0.19,0.19,0.18,0.18,0.18,0.18,0.18,0.18,0.18,0.17,0.17,0.17,0.17,0.17,0.17,0.17,0.17,0.16,0.16,0.16,0.16,0.16,0.16,0.16,0.16,0.16,0.15,0.15,0.15]
f=[100.00,2119.19,4138.38,6157.58,8176.77,10195.96,12215.15,14234.34,16253.54,18272.73,20291.92,22311.11,24330.30,26349.49,28368.69,30387.88,32407.07,34426.26,36445.45,38464.65,40483.84,42503.03,44522.22,46541.41,48560.61,50579.80,52598.99,54618.18,56637.37,58656.57,60675.76,62694.95,64714.14,66733.33,68752.53,70771.72,72790.91,74810.10,76829.29,78848.48,80867.68,82886.87,84906.06,86925.25,88944.44,90963.64,92982.83,95002.02,97021.21,99040.40,101059.60,103078.79,105097.98,107117.17,109136.36,111155.56,113174.75,115193.94,117213.13,119232.32,121251.52,123270.71,125289.90,127309.09,129328.28,131347.47,133366.67,135385.86,137405.05,139424.24,141443.43,143462.63,145481.82,147501.01,149520.20,151539.39,153558.59,155577.78,157596.97,159616.16,161635.35,163654.55,165673.74,167692.93,169712.12,171731.31,173750.51,175769.70,177788.89,179808.08,181827.27,183846.46,185865.66,187884.85,189904.04,191923.23,193942.42,195961.62,197980.81,200000.00]
在AD5272設(shè)置為1023時(shí),測量信號頻率從100Hz到200kHz變化時(shí),輸入信號,輸出信號以及它們的比值隨著頻率的變化的情況。
▲ AD5272設(shè)置為1023時(shí),分壓電阻的增益頻率曲線
測量數(shù)據(jù)為:
vout=[0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02]
vin=[0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20]
ratio=[0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09]
f=[100.00,2119.19,4138.38,6157.58,8176.77,10195.96,12215.15,14234.34,16253.54,18272.73,20291.92,22311.11,24330.30,26349.49,28368.69,30387.88,32407.07,34426.26,36445.45,38464.65,40483.84,42503.03,44522.22,46541.41,48560.61,50579.80,52598.99,54618.18,56637.37,58656.57,60675.76,62694.95,64714.14,66733.33,68752.53,70771.72,72790.91,74810.10,76829.29,78848.48,80867.68,82886.87,84906.06,86925.25,88944.44,90963.64,92982.83,95002.02,97021.21,99040.40,101059.60,103078.79,105097.98,107117.17,109136.36,111155.56,113174.75,115193.94,117213.13,119232.32,121251.52,123270.71,125289.90,127309.09,129328.28,131347.47,133366.67,135385.86,137405.05,139424.24,141443.43,143462.63,145481.82,147501.01,149520.20,151539.39,153558.59,155577.78,157596.97,159616.16,161635.35,163654.55,165673.74,167692.93,169712.12,171731.31,173750.51,175769.70,177788.89,179808.08,181827.27,183846.46,185865.66,187884.85,189904.04,191923.23,193942.42,195961.62,197980.81,200000.00]
在AD5272設(shè)置為100時(shí),測量信號頻率從100Hz到200kHz變化時(shí),輸入信號,輸出信號以及它們的比值隨著頻率的變化的情況。
▲ AD5272設(shè)置為100時(shí),分壓電阻的增益頻率曲線
測量數(shù)據(jù)為:
vout=[0.11,0.11,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.10,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.09,0.08,0.08,0.08,0.08,0.08,0.08,0.08,0.08,0.07,0.07,0.07,0.07,0.07,0.07,0.07,0.07,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.06,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.05,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.03,0.03,0.03,0.03,0.03,0.03,0.03,0.03,0.03,0.03]
vin=[0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.21,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20,0.20]
ratio=[0.50,0.50,0.50,0.50,0.49,0.49,0.49,0.48,0.48,0.48,0.47,0.47,0.46,0.46,0.45,0.44,0.44,0.43,0.43,0.42,0.41,0.41,0.40,0.40,0.39,0.38,0.38,0.37,0.37,0.36,0.35,0.35,0.34,0.34,0.33,0.33,0.32,0.32,0.31,0.31,0.30,0.30,0.30,0.29,0.29,0.28,0.28,0.28,0.27,0.27,0.27,0.26,0.26,0.26,0.25,0.25,0.25,0.24,0.24,0.24,0.23,0.23,0.23,0.23,0.22,0.22,0.22,0.22,0.22,0.21,0.21,0.21,0.21,0.20,0.20,0.20,0.20,0.20,0.20,0.19,0.19,0.19,0.19,0.19,0.19,0.18,0.18,0.18,0.18,0.18,0.18,0.18,0.17,0.17,0.17,0.17,0.17,0.17,0.17,0.17]
f=[100.00,2119.19,4138.38,6157.58,8176.77,10195.96,12215.15,14234.34,16253.54,18272.73,20291.92,22311.11,24330.30,26349.49,28368.69,30387.88,32407.07,34426.26,36445.45,38464.65,40483.84,42503.03,44522.22,46541.41,48560.61,50579.80,52598.99,54618.18,56637.37,58656.57,60675.76,62694.95,64714.14,66733.33,68752.53,70771.72,72790.91,74810.10,76829.29,78848.48,80867.68,82886.87,84906.06,86925.25,88944.44,90963.64,92982.83,95002.02,97021.21,99040.40,101059.60,103078.79,105097.98,107117.17,109136.36,111155.56,113174.75,115193.94,117213.13,119232.32,121251.52,123270.71,125289.90,127309.09,129328.28,131347.47,133366.67,135385.86,137405.05,139424.24,141443.43,143462.63,145481.82,147501.01,149520.20,151539.39,153558.59,155577.78,157596.97,159616.16,161635.35,163654.55,165673.74,167692.93,169712.12,171731.31,173750.51,175769.70,177788.89,179808.08,181827.27,183846.46,185865.66,187884.85,189904.04,191923.23,193942.42,195961.62,197980.81,200000.00]
將上面三組增益曲線繪制在同一張圖中:
▲ 增益隨著頻率變化曲線
結(jié)論
通過對AD5272的檢測測試,驗(yàn)證了它作為可變電阻的基本特性。特別是動(dòng)態(tài)特性,可以滿足一般音頻信號的放大與調(diào)節(jié)。
參考資料
[1] 寄生電容: https://zhuoqing.blog.csdn.net/article/details/104134132
[2] 基于STC8G1K08的實(shí)驗(yàn)電路板: https://zhuoqing.blog.csdn.net/article/details/105612710
[3] AD9833數(shù)字信號發(fā)生器模塊: https://zhuoqing.blog.csdn.net/article/details/104112884
推薦閱讀:
特別推薦
- 兆易創(chuàng)新GD32F30x STL軟件測試庫獲得德國萊茵TüV IEC 61508功能安全認(rèn)證
- 芯科科技第三代無線開發(fā)平臺引領(lǐng)物聯(lián)網(wǎng)發(fā)展
- MSO 4B 示波器為工程師帶來更多臺式功率分析工具
- 艾為電子推出新一代高線性度GNSS低噪聲放大器——AW15745DNR
- 瑞薩發(fā)布四通道主站IC和傳感器信號調(diào)節(jié)器, 以推動(dòng)不斷增長的IO-Link市場
- e絡(luò)盟現(xiàn)貨供應(yīng) Abracon 新推出的 AOTA 系列微型鑄型電感器
- 加賀富儀艾電子推出支持Wi-Fi 6和藍(lán)牙的無線局域網(wǎng)/藍(lán)牙組合模塊
技術(shù)文章更多>>
- 數(shù)字驅(qū)動(dòng)工業(yè),智能賦能制造 AMTS & AHTE SOUTH CHINA 2024同期會議全公開!
- 團(tuán)體觀展招募!104CEF開啟組團(tuán)觀眾通道,解鎖更多禮遇
- 觸摸式OLED顯示屏有望重新定義汽車用戶界面
- 用Python自動(dòng)化雙脈沖測試
- 揭秘電動(dòng)汽車中直流鏈路電容器的奧秘(上)
技術(shù)白皮書下載更多>>
- 車規(guī)與基于V2X的車輛協(xié)同主動(dòng)避撞技術(shù)展望
- 數(shù)字隔離助力新能源汽車安全隔離的新挑戰(zhàn)
- 汽車模塊拋負(fù)載的解決方案
- 車用連接器的安全創(chuàng)新應(yīng)用
- Melexis Actuators Business Unit
- Position / Current Sensors - Triaxis Hall
熱門搜索
電阻觸控屏
電阻器
電阻作用
調(diào)速開關(guān)
調(diào)諧器
鼎智
動(dòng)力電池
動(dòng)力控制
獨(dú)石電容
端子機(jī)
斷路器
斷路器型號
多層PCB
多諧振蕩器
扼流線圈
耳機(jī)
二極管
二極管符號
發(fā)光二極管
防靜電產(chǎn)品
防雷
防水連接器
仿真工具
放大器
分立器件
分頻器
風(fēng)力渦輪機(jī)
風(fēng)能
風(fēng)扇
風(fēng)速風(fēng)向儀