【应用】模拟开关SGM3157在音频信号切换电路中的使用，-3dB的带宽高达300MHZ

时间： 2020-03-27 来源：世强

技术问答

有一款一体机客户定制产品需求将麦克风输入信号，DVD音频输入信号以及收音机模块的音频输出信号都采集到系统中来；用户通过显示界面上的功能按钮就能得到想要的音频内容。麦克风的音频信号主要用来玩声控游戏或者演唱PK，DVD和收音机主要是做为一体机的辅助设备，二者的音频数据需要借助系统固有的音频通道播放出去。

为了实现这个功能，一种方案是可以使用三组的模数转换芯片，比如ADC或者USB接口的声卡，这种方案可以同时采集到三个接口数据，但是成本高，对于我们这种非同时使用的产品是一种浪费；另一种方案是使用继电器或者音频信号切换开关，通过两组开关来选择三个信号中的一个（先使用第一个切换开关来切换前两路信号，再使用第二个切换开关来切换第一路切换开关得到的信号和第三路信号，最终通过两路控制信号来实现信号的三选一），后端只需要一个ADC芯片就能满足要求，考虑到本产品对音频指标没有非常高的要求，而且信号大小比较适中（ADC的模拟信号输入电压范围限制），可以使用音频信号切换开关，省空间，成本更有优势。

基于这个思路，我们在市面上找了一些针对音频信号的切换开关，根据规格书参数和报价做了一番比对，决定优先使用圣邦微的这款模拟开关芯片SGM3157应用于音频信号切换电路，我们特别看重它的-3dB的带宽高达300MHZ，该参数使得我们在其他高速率的数字信号切换电路上也能使用。使用SGM3157做前期的样板开发，测试具体的性能参数，该部分的原理图如下图。

图1. SGM3157的原理图

SGM3157的工作电压是1.8V~5.5V，我们这里使用的是5V供电，这个主要是考虑到后端的ADC芯片的模拟信号输入电压范围大部分也是在5V之内，可以保证较大的工作范围；

它的导通电阻值为4.5Ω，而且能保持较高的导通电阻稳定性，该参数可以进一步的保证信号的线性度和低失真度；

它的-3dB带宽为300MHZ，带给音频信号足够低的影响，同时也能确保它可以用在其他较高速率的信号链路上，有利于产品的广泛应用需求，减少公司物料管理成本；

SGM3157外围电路简单，很容易使用，封装也小，有效的减少PCB的板上空间占位；同时要注意它只支持正信号输入，负信号输入会被削波，必要的情况下要做好直流工作点的匹配。如下是我们的一个产品图。

图2. SGM3157产品图

从图中我们可以看出SGM3157体积足够小，基本到哪都放得下；同时它的高带宽，低导通电阻特性可以进一步增加芯片的使用范围。我们产品使用了该芯片之后，对输出声音做了测试，用户基本察觉不出来变化；后续我们又将该芯片用在了I2S等其他数字信号的切换上，同样也达到了我们的要求，值得大家去使用。

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SGMicro（圣邦微）-TI/ADI/ON产品对照表

型号- OPA335,OPA698,SGM8273-1AXN5,OPA2364,OPA330,SGM8955XN5G/TR,AD8605ARTZ,SGM724,LMV821M7 NOPB,SGM8199A3XC6G/TR,OPA2357,SGM80582XS8G,OPA2355,OPA2354,SN74LVC1G08DCKR,TPS61240,SGM8261-2,74LVC1G32GW,LMP2021MF/NOPB,AD8531ART,LM7301IM5 NOPB,OPA2350,SGM8094,MC33272ADR2G,SGM8091,SGM8092,SGM8093,SGM722,ADTL084,TLV3542,OPA376AIDCKR,TLV3541,LMC7660,SGM810-SXN3/TR,NCV33274ADR2G,OPA2170AIDGKR,AD8629ARMZ-REEL,SGM809-SXN3/TR,OPA364IDBVR,SN74LV4051,SGM8557-1XN5,TS321IDBVR,SGM8270-2XS8G/TR,TLV3544,SN74LVC1G00DCKR,IMP809T,IMP809S,IMP809M,SGM8770XS8G/TR,SGM8416-1,SGM8957-1XN5G/TR,SGM8416-2,TLV271IDBVR,ADM708SARZ,SGM8271BYN5G/TR,TPS73433DDCR,SGM809-RXN3L/TR,AF809N293MR-3,AD8091,SGM7SZ125YC5G/TR,SGM58031,AD8094,AD8093,AD8092,SGM8273-2,LT1797CS5#TRMPBF,SN74AHCT1G125D,SGM8273-4,OPA2365,SGM8273-1,SGM809-XXN3/TR,AME8500AEETAF31Z,74AVCH8T245PW,OPA376,SGM8557-3,LMV321IDBVR,SGM8557-1,SGM8557-2,LMH6611MKX/NOPB,SGM7SZ00YN5G/TR,SGM809-SXN3L/TR,AD8062,AD8061,SGM721XS/TR,OPA330AIDBVR,AD8063,SGM42609,AME8500AEETAF44Z,PT7M7810STEX,SGM7SZ08YN5G/TR,SGM8541XN5/TR,INA214B,SGM7SZ04YC5G/TR,LM358,SGM8957-2XMS8G/TR,TXB0104RUTR,NCS20074DTBR2G,SN74LVC1G3157DCKR,LMV324,TL343,OPA3355,SGM8270-2,SGM8270-4,OPA357,OPA2188,OPA354,OPA355,SGM61230,SGM8558-1,SGM8301YN5,NCS199A2SQT2G,OPA350,OPA4357,SGM8T245XTS24G/TR,OPA2171,OPA4354,SGM2205-3.3XKC3G/TR,SGM8210-1AXN5G/TR,OPA365,OPA4350,TSV321RILT,TLV4333,TL082IDR,AD8051,AD8055,AD8054,AD8053,LMV934MTX/NOPB,AD8052,LMV824DR2G,SGM721XN5/TR,SGM8255A-1XN5G/TR,SGM8274YTS14G/TR,SGM2040-3.3YUDH4G/TR,MC33202,UA78M33CKCS,LMV358,SN74LVC1G32DCKRE4,SGM2036-3.3YN5G/TR,OPA4170AIDR,SGM8557-1AXN5G,SGM8622XMS/TR,LP2980,MC33179DR2G,SGM809-1.63V,SGM8255A-2XS8G/TR,SGM8551XN5,TLV2171,SGM8740YN5,SGM8273-2XS,LM393,SGM8632C,SGM8273-1AXN5G/TR,ADM706SARZ,LMV822MMX/NOPB,ISL28290FBZ-T7,AD8615_6,TLV274IPWR,AD8666ARMZ-REEL,OPA172IDBVR,SGM8965,MC33178DR2G,SGM8604,MCP6004T-E/ST,TLC2272,LM258,SGM7SZ245XTS20G/TR,LMV393,TL082,SGM8965-2,SGM8965-1,INA199A1DCKR,MCP6561T-E/OT,SGM8957,SGM8959,SGM8955,OPA2320,TPS54218ARTE,LM2904,AD8614ARTZ-R2,SGM3749YTDI6G/TR,SGM811-SXKA4/TR,TPS61165,OPA2171AIDGKR,SGM4564YUQN12G/TR,LMC6482AIMX NOPB,TPS61160,SGMOP07EXS8G/TR,SGM8557-2XS8G/TR,MAX4239,SGM7SZ08YC5G/TR,SGM3157YC6/TR,TS321ILT,OPA2301,SGM8210-2XMS8G/TR,"SGM8255A-1XN5G/TR SGM8425AYN5G/TR",SN74LVC1G14DBVRG4,VIC5111-293BDI,TPS54202,SGM8552XMS8G/TR,TSZ122IST,ISL28177,STR8293-263BSI,OPA2335,TLV272IDGKR,MC74HC1G04DFT2G,OPA365AIDBVR,SGM8557-1AXN5G/TR,SGM8631,SGM8632,SGM8554XTS14G/TR,LSP2200CALS,AP7335-33WG-7,SGM7SZ14YC5G/TR,LM358AN NOPB,LSP2200CALR,SGM8634,NC7SZ08P5X,INA199B1DCKR,AD8538,TLV3201AIDBVR,SN74AVC2T244DQ,SGM8542,SGM8301,SGM8544,SGM8302,SGM8199A1XC6G/TR,INA199A3DCKR,SGM809-TXN3/TR,SGM8304,SGM8428,AD8668,NCS333SN2T1G,SGM8555-1XN5,SGM8631XN5/TR,SGM8959-1,SGM4556YXDO8G/TR,MC33272,SGM8652,SGM8199A2XC6G,SGM8653,TLV62565DBV,SGM8654,SGM8959-1XN5G/TR,SGM8655,125,SGM8770,NCS20072DR2G,SGM8651,AD8552,SGM8538,LMV824IPT,SN74AHCT245DWR,TLC272,TL064IDT,TLE2021,TLE2142,SGM8199A2,NCS2333DR2G,PT7M7809S,TP5552,SGM41298,SGM6011,LM7321MF/NOPB,SGM8210-2XS8G,SGM8556,SGM8957-2XS8G/TR,SGM2558BYS8G/TR,SGM8552,ISL28133FHZ-T7,OPA340UA,MAX9617AXT+T,SGM8557,SGM8558,IMP811SEUS-T,MCP664,MCP662,SGM6605-5.0YN6G/TR,ADN8834,INA199A2DCKR,NCV33274ADTBR2G,MCP661,SGM3209YS8G/TR,INA199B2DCKR,MC33074ADTBR2G,SGM8199A3XC6G,SN74LVC2244APWR,LM7322MME/NOPB,NL17SZ08DFT2G,MC33078,MCP651,MCP652,AD8628,OPA376AIDBVR,SGM8255-4XS14G/TR,SN74LVC1G125DC,ADA4891-1,LMV342MM NOPB,ADA4891-2,LMV710M5 NOPB,SN74AHC1G14DBVR,AD8510,NCS199A1SQT2G,SN74AVC8T245PWR,AD823,OPA4330AIPWR,74LVC1G08GW,TPH2502,TPH2501,TPH2504,ADA4891-4,LM2903MX,AD8605ARTZ-REEL7,AD8602,SGM8295-4XS14G/TR,AD8605,OPA4277UA,MC33172,SGM7SZ32YC5G/TR,LMC7101QM5/NOPB,SN74LVC1G14DCKR,SGM8210-1,SGM8210-2,TSZ121ILT,AIC809-29,TLV2333IDR,LMV611MF/NOPB,SGM8199A2XC6G/TR,SGM8740YN5G/TR,SGM8632CXMS8G/TR,NC7S04P5X,SGM8271AYN5G/TR,LM3526,OPA2197,SGM8958-1XC5G/TR,AD8665ARJZ-REEL,SGM7SZ244,SGM321,TLV2314IDGKR,SGM8251XS8G/TR,LM258DR2G,TPS61410,SGM8294YTS14G/TR,STR8210-293BSI,SGM80584,SGM8273-2XS8G/TR,AME8500AEETAF26Z,OPA177GS/2K5,LM4871,SGM8252A,SGM809-RXN3/TR,LMV824MX NOPB,SGM7SZ14YN5G/TR,TS507IYLT,SGM8270,LMH6643,SGM8271,LMH6644,SGM8273,LMH6642,MP2459,SGM3749YTN6G/TR,SGM80581,SGM80582,SGM8581XN5G/TR,TS321AILT,LMV822,SGM706B,TLV2372IDGKR,LMV722MMX-NOPB,NJM3403AV,ISL28130CHZ-T7,SN74LVC1G08DBVR,SGM8061,SGM8062,SGM8063,TP2412,SGM4871YS8/TR,OPA2171AIDR,LF353DR,LMV710,TLV333,SGM809-MXN3/TR,LM293ADR,PT7M7809STEX,SGM8965-1XN5G/TR,SGM8051,SGM8052,SGM8295,SGM8053,TPS72733,SGM8054,LMV842,AME8500AEETAF29Z,SGM8055,DRV8837DSGR,SGM708B,SGM8199A1XC6G,SN74AHC1G00DBVR,CY74FCT2245CTQ,SGM8965-1XN5,TS5A3157,MCP6004T-I/SL,SGM2300-ADJYN5G/TR,SGM48751YTS16G/TR,LMC7101AIM5 NOPB,ADA4807-1,LMP2022MAX/NOPB,TLV9062,CY74FCT2244ATQ,LMP7715MFX/NOPB,ADS1115,NCS20081SN2T1G

对照表 - SGMICRO XLSX 中文下载

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描述- SGMICRO specializes in high-performance and high-quality analog and mixed-signal integrated circuits, and is committed to building a comprehensive portfolio of the highest quality analog and mixed-signal integrated circuits to address all customer needs.

型号- SGM11108M,SGM8306-2,SGM8306-1,SGM61450,SGM3733B,SGM11108E,SGM852,SGM853,SGM851,SGM5347-12,SGM2558A,SGM2558B,SGM8261-5,SGM2564,SGM8261-1,SGM5347-10,SGM8261-2,SGM2549,SGM48017C,SGM72110,SGM8094,SGM836,SGM8091,SGM837,SGM61220,SGM8092,SGM8093,SGM835,SGM72108,SGM2553,SGM72106,SGM2555,SGM809B,SGM4519,SGM4517,SGM4518,SGM48010,SGM11106C,SGM63600,SGM41611,SGM4520,SGM4521,SGM48005,SGM8417-4,SGM8417-2,SGM4051C,SGM48000,SGM48001,SGM48002,SGM3843A,SGM61433,SGM621,SGM84782,74HC574,SGM58031,SGM620,SGM862,SGM41600,SGM2572,SGM41603,SGM860,SGM2571,SGM51622H,SGM4995,SGM4511,SGM2574,SGM4996,SGM4512,SGM4510,SGM2575,SGM51622D,SGM4515,SGM8T245S,SGM4516,SGM8250-1,SGM8250-2,SGM4514,SGM3209,SGM809,SGM8557-3,SGM8557-1,SGM8557-2,SGM803,SGM61012,SGM804,SGM802,SGM61013,SGM810,SGM811,SGM61007,SGM61006,SGM4782,SGM7237B,SGM8902,SGM8903,SGM8904,SGM4542,SGM8905,SGM4548,SGM4549,SGM3699,SGM4546,SGM4547,SGM48013C,SGM62110,SGM61020,SGM62112,AAP6153A,SGM61022,SGM62111,SGM800,SGM2596,SGM3200,SGM3206,SGM8270-2,SGM3207,SGM4535,SGM3204,SGM8270-4,SGM8T245,SGM829,SGM61230,SGM42512,SGM41664,SGM825,SGM61232,SGM823,SGM61234,SGM824,SGM891B,SGM42507,SGM42506,SGM40567,SGM4560,SGM42505,SGM4561,SGM6503,SGM4566,SGM8925,SGM6502,SGM8926,SGM6501,SGM4564,SGM8927,SGM5349-16,SGM4565,SGM6505,SGM4568,SGM6504,SGM8909,SGM818,SGM890B,SGM816,SGM42501,SGM40565,SGM42500,SGM814,SGM815,SGM812,SGM40560,SGM40561,SGM821,SGM822,SGM61235,SGM820,SGM4551,SGM4552,SGM4550,SGM4555,SGM4556,SGM4553,SGM4554,SGM51652S8,SGM8910,SGM5347-8,SGM4558,SGM11124E,SGM37863A,SGM11124F,74LVC2T45,SGM893B,SGM4581,SGM8941,SGM4582,SGM4583,SGM48521Q,SGM8704,SGM4588,SGMNQ59430,SGM8705,SGM4589,SGM8706,SGM8707,SGM8942,SGM8701,SGM8702,SGM8703,SGM12213A,SGM11210A,SGM61060,SGM2050C,SGM12UB1D2,SGM892B,SGM8276-4,SGM6510,SGM4573,SGM3001,SGM4574,SGM42513,SGM6514,SGM3005,SGM6513,SGM4578,SGM8276-2,SGM3002,SGM6512,SGM42622B,SGM8276-1,SGM3003,SGM6511,SGM4576,SGM8931,SGMOP17C,SGM8932,SGM8933,SGM6516,SGM12214A,SGM8934,SGM6515,SGM11210M,SGMNE20220,74AVC8T245,SGM3141B,SGM61030,SGM42403Q,SGM42553,SGM61032,SGM61031,74HC165,SGM62116,SGM8953-1,SGM62118,SGM8953-2,SGM62117,SGM8708,SGM8709,SGM4075-2,SGM3140B,SGM61040,SGM4075-1,SGM42544,SGM7300A,SGM7300B,SGM42541,SGM42540,SGM8951,SGM8952,SGM8710,SGM4590,SGM5200,SGM38045,SGM38042,SGM6533,SGM8711,SGM8712,SGM8955,SGM38046,SGM8956,SGM2053S,SGM8199L2,LM2904,SGM8199L1,SGM41002,SGM8968-4,SGM8968-2,LM2902,SGM8968-1,SGM8740,SGM8741,SGM8742,SGM2077A,SGM8743,SGM2077B,SGM8263-1,SGM8748,SGM8263-2,SGM8417-1,SGM8749,SGM12CB1A5,SGM8744,SGM40666B,SGM8745,SGM11104S,SGM40666A,SGM8746,SGM8747,SGM41513D,SGM41513A,SGM42561,SGM42560,SGM8957-1,SGM8957-2,SGM42562,SGM5208-14,SGM5223,SGM48018C,SGM11102F,SGM11102G,SGM41512A,SGM37603A,SGM8521,SGM8522,SGM11102S,SGM33685A,SGM5018,SGM33685B,SGM33685C,SGM8524,SGM8604-1,SGM11103E,SGM8604-5,SGM8193A3,SGM11103F,SGM8604-2,SGM8193A2,SGM48019C,SGM8604-3,SGM8193A1,SGM8193A0,SGM37604A,SGM8751,SGM11103S,SGM41007,SGM41008,SGM6332,SGM8750,FT2830P,SGM11212M,SGM41280,SGM41281,SGM41283,SGM5353-16,SGM37891A,SGM41285,SGM41286,SGM7SZ244S,SGM8542,SGM51652H8,SGM8543,SGM8301,SGM8544,SGM8302,SGM8545,SGM51652H4,SGM8541,SGM8429C-4,SGM8304,SGM8607-2,SGM37892A,SGM13003A,SGM8531,SGM8773,SGM8532,SGM8534,SGM8770,SGM8771,SGM8772,SGM8535,SGM8536,SGM8537,SGM12024A,SGM8538,SGM65230,SGM37893A,SGM65231,SGM65232,SGM8969-2,SGM8969-1,SGM13002A,SGM2035C,SGM7232,SGM9128YP,SGM41291,SGM2036S,74LVC1G32Q,SGM13001C,SGM13001B,74LVC138,SGM2581E,SGM8958-2,SGM41295,SGM13001A,SGM8958-1,SGM7222,SGM6132,SGM8554,SGM7223,SGM8555,SGM7224,SGM6130,SGM8556,SGM2581C,SGM8551,SGM7220,SGM2581A,SGM8552,SGM7226,SGM7227,SGM7228,SGM7229,SGM44599,SGM8581,SGM8713A-1,SGM8582,SGM6613A,SGM8584,SGM832B,SGM41282C,SGM832A,SGM8714B-1,SGM8924A,SGM811C,SGM5355-16,SGM7SZ19,74LVC1G125,SGM48535B,SGM89000,SGM7SZ14,SGM811B,SGM48535A,SGM48752X,SGM431VB,SGM2560A,SGM37603,SGM2560B,SGM6611C,SGM15CB1A4,SGM810B,SGM41280A,SGM8591,SGM8592,SGM48753X,SGM9203,SGM6612A,SGM8594,SGM8922A,SGM4T245,SGM48753,SGM48754,SGM48755,SGM48756,SGM51242R8,SGM48757,SCM40668,SGM813B,SGM48759,74AVC4T245,SGM8140,SGM8141,SGM48751,SGM449,SGM48752,SGMNQ07430,SGMPM21330,SGM48510,SGM458,SGM3785S,SGM37864,SGM61720,SGM459,SGM37863,SGM457,SGM8142,SGM452,SGM450,SGM451,SGM05UB1B3,SGM37862,SGM37861,SGM05CB1A8,SGM05CB1A7,SGM812B,SGM05CB1A4,74GTL2005,SGM25881,SGM447,SGM448,SGM446,SGM7SZ244,SGM8478-1C,SGM51242R4,SGM8139,SGM51242R2,SGM3705,SGM48536,SGM48537,SGM48538,SGM48539,SGM5351-16,SGM2588G,SGM2588E,SGM2588K,SGM3712,SGM3713,SGM2588C,SGM3710,SGM3711,SGM2588A,SGM48522,SGM48523,SGM48525,SGM48526,SGM48760,SGMNQ07440,SGM48520,SGM48521,SGM8557-5,SGM71XX,SGM706B,SGM460,SGM3701,SGM3700,SGM3727,SGM3741B,SGM3725,SGM3726,SGMOP07,SGM898,SGM899,SGM896,SGM897,SGM895,SGM4823,SGM2566B,SGM3735,SGM3732,SGM4822,SGM2566A,SGM3716,SGM3740B,SGM48544,SGM4806,SGM3717,SGM48545,SGM3714,SGM3715,SGM4809,SGM4807,SGM3718,SGM4808,SGM3719,74LVC157,SGM48780,SGM48540,SGM48541,SGM48542,SGM48543,SGM37898,SGM51652H,SGM51652D,SGM3720,SGM37891,SGM4812,SGM37892,SGM4810,SGM37895,SGM3749,SGM3747,SGM3748,SGM72204A,SGMNQ40430,SGM

选型指南 - SGMICRO - 2024/6/11 PDF 英文下载

SGMICRO-TI/ADI/MAXIM/MPS/SILERGY/ST等信号链电源芯片对照表

描述- 圣邦微SGMICRO与TI/ADI/MAXIM/LT/Onsemi/ST/Microchip/Nexperia/MPS/TOSHIBA/ROHM/RICHTEK/SILERGY/ABLIC/Renesas/Diodes/NXP/NJM/Infineon/Allegro 等品牌的信号链、电源芯对照表。

型号- SY8388,SN74HC541,A3981,IR44273,74AVC8T245Q,TS3A24159,TS3A24157,FAN3100,SLG88103,ADA4622-2,SLG88104,ADA4622-1,SGM2560,NA199,SGM2564,TSL6002,LMR23620,SGM48017C,LM431,FAN49103,MAX4282,SGM61220,BD9A201,74HC595,TLV3542,TLV3541,TS3A4751,TLV522,LMR23630,FAN53611,TC7SZ14FU,74LCX04,NCS21803,HCF4051,NCS21801,HCF4052,74LCX08,HCF4053,TSC214I,TLV3544,LMP2022,TSB611,NL27WZ04,SGM2588,FAN53601,SN74HC573,SN74HC574,INA333,TSU101,TSC213I,TSU102,NTMFS4C10N,UCC27531-Q1,TSU104,RT8293,74HC573,74HC574,SGM621,RT8290,SGM41600,TSB621,SGM620,SGM2572,SGM41603,SGM2571,SGM2576,SGM2575,SGM2578,SGM8T245S,RT8296,NL17SG07,SGM8557-1,TSU111,SGM8557-2,TSU112,ESD103-B1-02,INA321,TLV2242,TLV2241,SGM2205-12XK3G,ISL28118,OPA2277,BU30TD2,LM5109,BQ25619,SGM48013C,BQ25618,INA317,BQ25611,SGM62110,SGM62112,FSA4157,TPS76933,SGM2593,XB6091IS,BQ25601,TPS76950,BQ25600,SGM61230,TXS0104,TXS0102,SGM61232,SGM61234,TLV8801,TXS0101,SGM61233,74HC123,SGM5349-16,TLV62084,SGM431V,LTC2054,TPS51200,LTC2050,TLV8812,TLV8811,SGM61235,TLV8802,RT8253,BD9D323,BD9D322,AD5541,PMPB27EP,TPS54302,SGM4553YXET,LM7322,SGM8706,LM7321,SGM8707,SGM8701,MAX4664,LPV7215,SGM12UB1D2,AP2191,SGM3001,SGM42513,74LVC245A,SGM3005,TPS61099,SGM3002,SGM8276-2,TPS7A8300,SGMOP17C,TPS2553,ISL28130,TPS2556,TPS2557,SGM42403Q,SGM42553,BD6222,SGM8255B-2,ISL28134,74AHC1G08GV,TPS2551,74HC165,SGM62116,SGM62118,SGM62117,TPS3852-Q1,MAX4684,74HC164,AP2172,A3916,AP2171,TPS560430,A3918,BQ25638,SGM8709,U74LVC126,MP8676,SGM61280,MCP6V16,SGM42544,NCP718,LMX331,LMR36520,LM27761,TC7SZ32FU,SN74LVTH162373,ADM708,ADM707,SGM38042,SGM38046,TPS54340,MAX4230,TPS3823,LM2904,TC74VHC138,LM2902,LM2903,SGM8740,SGM2077A,SGM8742,SGM2077B,SGM8743,PESD5V0F1BSF,SGM41515A,MIC5209,LPV802,LPV801,SGM8748,SGM8749,NLAS44599,TPS54336,SGM40666A,SGM8746,TC74VCX16245,TPS54331,74LCX32,TPS54335,SGM41513D,SGM41513A,MCP6406,FTL75939,OPA548,SGM8957-1,MCP6402,SGM8957-2,TLV6208,SGM5223,MAX4232,TC74LCX16244,MAX4231,TPS3808,SN74LVC2T45,OPA2333P,MAX4236,SGM8551XN,TPS3840,TPS54320,SGM48018C,OPA990,RT4730,SGM41512A,SGM8745X,SN74AHC1,MAX9938,74LVTN16244,74LVTN16245,LPV821,SGM48019C,MCP6V52,MCP6V51,RT4723,OPA2210,TLV755P,SN74AC244,MCP6V54,AW2027,SGM8604-2XTDU8G,SGM8750,LPV812,LPV811,AD8534,SGM41283,SGM5353-16,AP2120,AD8539,AD8538,74LVC125,MCP6V69,74LVC126,SGM41285,DRV8313,MCP6V67,SN74LVC2G66,SGM7SZ244S,CAT4104,TS321,SGM8429C-4,AD5593R,SGM61430A,MP28373,MP5121,TMP108,74LVT16373,SGM8304,MAX40078,AD8541,74LVT16374,MCP6442,TMP103,TMP102,MP9943,MP9942,AP2112,MCP6V79,NCV890100,SGM13003A,MCP6V76,STSPIN250,MCP6V77,74LVTH125,SGM8770,AP2114,SGM38042B-1,LM2841,AD8513,AD621,AD620,NCS20034,SGM65230,NCS20032,AD623,AD8515,SGM65231,AD627,TC7SPN334,SGM13002A,SGM8477-1,SGM2035C,SGM41291,SGM2036S,MCP6V96,TUSB320,74LVC138,SGM7SZ245S,SGM8958-2,SGM41296,SN74CBT3245,MP9928,SGM41298,SGM8958-1,SGM6132,MAX4736,SGM6130,AD8532,AD8531,MAX4730,TPS3422,SGM833A,MCP6472,SGM833B,TLV1702,SGM7SZ32,SQ27403,MC74LVC74,TPS3420,TPS3421,TP2011,SGM2037H,MUX36S08,BISS0002,MC74AHC08,74LVC373A,TPS2595XXDSG,MCP6001,TPS3895,AD8502,TPS3896,TPS3897,AD8500,MCP6002,TPS3898,AP2151,SGM41282C,TPS3899,AD8506,AD8505,TLV7021,SGM832A,TP2025,MC33074,TP2021,MCP6004,MCP6006,LT7183,74LVC374A,AP2141,SN74LVC2G04,MCP6492,74LVC1G126,74LVC1G125,SGM48535B,SGM7SZ14,SGM48535A,SGM48752X,TPS2596,BU28TD2WNVX,AS179,XC6201,SGM15CB1A4,XC6206,TC7WZ04,SN74LVC2G14,MCP6022,SGM2210P,SGM7SZ08,MCP6024,SGM834A,SN74LVC2G17,MCP6021,SGM834B,SGM7SZ04,MP2497,SGM7SZ00,IRL44273LPBF,SGM48753X,SGM48754X,AD5592R,TLV61046A,TPS7A8400,SGM48753,SY8301,SGM48754,SQ24335,SGM2211S,SGM48757,ISL21080,SGM48759,SY8303,MCP6032,MCP6031,SGM48751,SGM48752,SGMNQ07430,SGM61720,TSV911,TSV912,TSV914,SN74AVC16T245,MP2490,SGM05UB1B3,LPV324,OPA4379,OPA4374,HD3SS3412,MCP6044,OPA4376,OPA2192,MCP6041,74VHC244,LMR16030,74AHCT595,APD7118,OPA2197,TPS62730,MCP6042,OPA2196,SN74AVC8T245,SN74LVC157,OPA2191,ADG509,ADG508,SGM8478-1C,FSA2457,TMUX415,TC7SZ00,LM1117,AD8599,TPS62743,TSV6192,SN74LVC125,SGM706S,SN74LVC126,RT6160,TPS76901,TC7SZ07,SGM2564A,TLV707P,NTMFS4C06N,MP2451,TS393,LMH6643,TC74VCX164245,SN74LVC138,SGM48760,SGM25662,MIC708,MCP6061,MP2460,LME49726,RT6150,MIC706,SN74AHCT86,MCP6074,TC7SH125F,STSPIN220,APD196,SGMOP07,74HC541,TC7SET08,LMC7211,BQ25890H,MAX706,MAX9119,MAX708,MCP6071,SGM2566C,74AHC573D,TC7SZ32,BU33TD2,74LVC157,YDA145,BD9G341,SGM2567S,NJMOP2277,INA828,LPV358,NCP382,NE5532,SGM2217Q,LMG1025-Q1,NCV6324,SGMNQ40430,NCV6334,SGM48536BQ,SGM21102G,74AHCT86,BGA524N6,SGM21102C,FSA2466,SGM21102B,INA818,SGM21102A,SGM05FB1E2,SN74AHC244,TLV74118,TC7SZ32F,NC7WZ04,74AVC8T245BQ,TSV991,TSV992,TSV994,SGM3851A,SGM48536CQ,TC913,74AHC244,AD8571,74AVC2T45,SGM2521A,TLV74128,SN74LVC541,AZ1117,LMV881,BU28TD2,MAX14589,TLV2316,SGM61330,SGM724,TS5V330,SGM5209-14,74LV541A,SGM3758,NJU7076,MAX4163,MAX4162,PESD15VW1BCSF,TLV74133,TPS25921A,OP213,TLV74130,SGM722,TLV2333,SGM723,SGM721,SGM8610-2,NLAS3899,OPA2140,EL5420,MAX4174,MAX4173,SGM15UB1E2,TC7SH126FU,SGM41100A,SGM61310,SKY13351,A4980,SGM41100V,SGM61306,SGM61305,SGM61308,SGM61307,SGM8262-2,TC7PZ14,SGM3795,74LCX126,74LCX125,74LVC541A,SGM3799,SA4159

对照表 - SGMICRO

SGMicro（圣邦微） SGM3157 数据手册

型号- SGM3157YC6,SGM3157YC6/TR,SGM3157

数据手册 - SGMICRO - REV. C. 1 - 2016年05月27日 PDF 英文下载

SGM DFAE Training Load Switch-OVP-Supervisor

型号- SGM2594CD,SGM48757,SGM48111,SGM8544,SGM853,SGM452,SGM450,SGM2564,SGM2522A,SGM2594BD,SGM812C,SGM2040-3.3,SGM48220,SGM836,SGM61220,SGM8773,SGM2591B,SGM8252,SGM2591C,SGM8770,SGM2591A,SGM4578,SGM2553,SGM2036,SGM2575A,SGM809B,SGM48017,SGM2592AD,SGM803B,SGM2580F,SGM259X 系列,SGM2580G,SGM2580D,SGM2580E,SGM61430,SGM2580K,SGM2580I,SGM2592C,SGM2580B,SGM2580,SGM2580C,SGM2592A,SGM8713A,SGM2592B,SGM2580A,SGM8713B,SGM3157,SGM2576B,SGM2588,SGM66051,SGM2207,SGM802B,SGM25701,SGM61280,SGM40642,SGM25661,SGM2572,SGM7220,SGM2571,SGM485211,SGM4995,SGM2574,SGM2210,SGM8958,SGM2576,SGM706B,SGM2212,SGM25701B,SGM8558,SGM72204,SGM7227,SGM8955,SGM25701A,SGM7229,SGM8956,SGM809,LM2904,SGM2591AD,SGM803,SGM804,SGM2592CD,SGM61135,SGM801,SGM802,SGM40666S,SGM2594A,SGM810,SGM2594B,SGM811,SGM41518,SGM41512,SGM2594C,SGM6602,SGM4027,SGM2521,SGM259X,SGM7200X,SGM2523,SGM2566B,SGM2522,SGM2566C,SGM3699,SGM2525,SGM2578A,SGM2566A,SGM2528A,SGM41511,SGM61020,SGM2592BD,SGM48541,SGM2590,SGM2592,SGM2591,SGM2594,SGM2593,SGM2596,SGM3206,SGM37892,SGM4535,SGM2567A,SGM811C,SGM2594AD,SGM851A,SGM851B,SGM2539,SGM708,SGM829,SGM41542,SGM41543,SGM42633,SGM827,SGM706,SGM828,SGM851C,SGM825,SGM61232,SGM826,SGM48211,SGM2591CD,SGM823,SGM824,SGM2572A,SGM40666AS,SGM2572B,SGM2584A,SGM2572C,SGM431,SGM460141,SGM2528B,SGM2528C,SGM2028,SGM3756,SGM810B,SGM2527,SGM2526,SGM48524D,SGM818,SGM816,SGM25062,SGM814,SGM2591BD,SGM815,SGM812,SGM8270N,SGM821,SGM8967-1,SGM40666BS,SGM8477,SGM41528,SGM8631,SGM708-S,SGM820,SGM708-T,SGM8197,SGM708-R,SGM8750,SGM4066X,SGM708-M,SGM6610,SGM708-L,SGM2531,SGM2521A,SGM2534,SGM708-J,SGM2533

商品及供应商介绍 - SGMICRO - 2023/3/25 PDF 中文下载

乾鸿微HS102EO应用于负压信号选通的高速SPDT模拟开关，电源工作范围2.5V~5.5V

某些功放产品（例如GaN功放）需要负电平精准控制功放的栅极电压。本文介绍一种简单的栅压控制方案，采用乾鸿微电子HS102EO型高速SPDT模拟开关进行栅压控制和高速切换。HS102EO型低压高速单刀双掷(SPDT)模拟开关是由深圳市乾鸿微电子有限公司自主设计，并基于国内代工厂工艺流片的模拟集成电路产品。

厂牌及品类发布时间 : 2024-08-19

【产品】用于切换音频电路的双通道单刀双掷模拟开关RS2117/RS2118，单电源供电下能过的负压信号可达-2V

RS2117/RS2118是润石科技的双通道单刀双掷（SPDT）模拟开关，是专门为交流信号设计的带负摆幅的开关，其工作电压为2.5V~5.5V，最大通过信号范围为-2V~VCC，具有＜=1uA的超低功耗，提供QFN-1.4×1.8-10L小封装。

新产品发布时间 : 2019-12-27

SGMICRO模拟信号开关选型表

高至4通道，SPDT，DPDT，低静态电流，低内阻，高带宽

TQFN-3×3-16L TSSOP-16

选型表 - SGMICRO 立即选型

【产品】用于检测3.5mm配件的音频耳机模拟开关SGM3798YTD，接地FET开关导通电阻典型值为110mΩ

SGMICRO（圣邦微电子）的SGM3798YTD是一款音频耳机模拟开关，通过外部控制器切换SLEEVE和RING2。接地信号通过一对低阻抗接地场效应管（FET）进行布线，对音频串扰性能的影响最小。该器件的接地FET设计允许FM信号通过，使得在移动音频应用中能够将耳机的地线用作FM天线。

新产品发布时间 : 2019-08-29

智能手机使用FM接收器Si4705，FM接收灵敏度差，接收空中信号少，只有5~6个电台，对比机器能停十几个电台，怎样解决？

该问题通过以下四点解决：1、FM信号直接从Si4705 FMI管脚灌入测试音频信噪比62dB，灵敏度0dBuV@30dB SNR；2、将RF信号从耳机座灌入Audio Return信号线，灵敏度为16dBuV；3、检查硬件设计，耳机输入电路采用了模拟开关来切换音频返回通道和MIC IN麦克风输入通道。由于模拟开态输入电容为118pF且共连接有6个端口，对地较大的电容使FM频段信号对地阻抗较低，对信号产生了较大的衰减作用。去掉切换芯片直接把信号短路进来，FM灵敏度提升了10dB达到6dBuV；4、耳机靠TIP端两极信号为R/Lout左右声道输出，在欧/美标耳机切换时是固定不变化的。使用其中一条信号线做FM输入，测试FM灵敏度进一步提升到1~2dBuV，实际空中电台停台与DEMO板一致，可停45个电台，FM停台少问题得到解决。

技术问答发布时间 : 2016-10-25