【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

时间： 2019-08-29 来源：SGMICRO

技术问答

SGMICRO（圣邦微电子）的SGM3798YTD是一款音频耳机模拟开关，用于检测3.5mm的配件，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。

SGM3798YTD采用TDFN-3×3-8L绿色环保封装，其工作环境温度范围为-40℃至+85℃。

SGM3798YTD音频耳机模拟开关的特点：

· 接地FET开关导通电阻R_ON：110mΩ（典型值）

· 高隔离的麦克风线路开关

· 支持FM信号通过接地FET传输

· 减少Click-Pop噪声

· 电源电压范围：2.6V至5V

· 总谐波失真（MIC）：0.01%（典型值）

· 低电流消耗：2μA（典型值）

· 工作温度范围：-40℃至+85℃

· 采用TDFN-3×3-8L绿色环保封装

SGM3798YTD音频耳机模拟开关的应用：

· 手机/平板电脑

· 笔记本电脑/超极本电脑

SGM3798YTD音频耳机模拟开关的典型应用电路：

SGM3798YTD音频耳机模拟开关的绝对最大额定值和推荐工作条件：

1、绝对最大额定值

· VDD的电压范围：-0.3V至6V

· SELECT，MICP，RING2，SLEEVE的电压范围：-0.3V至V_DD + 0.3V

· 结温：+150℃

· 储存温度范围：-65℃至+150℃

· 引线温度（焊接，10s）：+260℃

· ESD敏感性：

HBM：8000V

MM：400V

CDM：2000V

2、推荐工作条件

· 电源电压范围：2.6V至5V

· 工作温度范围：-40℃至+85℃

SGM3798YTD音频耳机模拟开关的封装/订购信息：

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SMG3798是圣邦微推出的一款具有降低GND开关RON和FM功能的音频耳机模拟开关。SMG3798专门用于检测3.5mm配件，并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FET（75mΩTYP）进行布线。

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型号- 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描述- ROHM launched the ComfySIL™ brand for customers involved in the design of functional safety to use products that support SIL (Safety Integrity Level) in a ‘Comfy’ (comfortable) manner, and for social systems' greater safety, security, and convenience to which ROHM can contribute through its products.

型号- DTC143TE3,KA2004-H05N20A,ML62Q20XX,RCJ220N25,SML-S13UT,DTC143TEB,RSX101VYM30,SML-D12M8W(C),SDR,R6002JND4,BD60A00NUX,RB238NS150,SML-D12Y8W,SMLA12BN8T,MG6405WZ,BDJ0GA3VEFJ-M,SML-811UT (A),SML-010VT,BD94130EFV-M,DTA124XM,BM2SC123FP2-LBZ,RS3L110AT,RB298T100,DTC143TCA,RSS060P05,BD71L4LG-1,SFR,BR25A512,RGPR20BM36HR,BD95821MUV,BD6995FV,KD2002-G0JB10A,BU23TD2W,SML-S13VT,BD12IC0WEFJ,BU97941FV,SLI-325YC(W),RQ5L015SP,BH7673G,SML-811UT (C),BD52XXG-2C,BD6046GUL,RGW60TS65HR,BD10KA5WFP,BA03CC0FP,SML-D12Y3W,BM6241FS,BD450S5FP2-C,MH2206WZ,BD63521EFV,BU94702AKV,SML-S13PT,RB168MM200,DTC144WCA,BD22621G-M,SLI-343URC,RS6R035BH,BDJ2FC0WFP,RGT20NL65,DTD123TC,DTA015TUB,BD750L5FP-C,BM521Q25F,R8003KNX,BD52XXG-1 SERIES,SML-D12D8W (C),DTA023YEB,UCR006,BD95514MUV,BD9S200MUF-C,SML-H10PD2B,DTD123TK,RFN6T2D,IMX25,BD80FD0WHFP,R6000ENH,SML-S13RT,BU64253GWZ,BD70GC0VEFJ-M,BD52XXG-2M,RBR2LAM30A,CSL0902DT (C),RBR5L30B,RBR5L30A,RSX501LAM20,RCX300N20,KD2003-F0FW00A,BH76363FV,RQ1E075XN,TFZV,RF4G060AT,BD83A04EFV-M,BV1LC085EFJ-C,BD10IC0WHFV,BU2394KN,BAXXBC0,SML-A12MT (J),BU4094BCF,KR2002-D06B71A,BD33C0AWFP2-C,ML86V76580,DTC114YEB,RQ5E020SP,BD63573NUV,DTA015TEB,BA90BC0,DTC114YE3,SML813BNT,BH1730FVC,DAN222WM,BD68888MUV,BM2P241W-Z,PML100,BU34DV7NUX,DTC143TKA,SCS220AJ,SMLK1,BD33GC0VEFJ-M,SCS220AG,R6511ENX,BDJ6FD0WHFP,SMLK18WBNCW,R6511ENJ,CSL0901UT (C),RX3L07BBG,QS8J2,RF305BM6S,SML-011VT (A),BH1603FVC,RS1E180BN,BD53108G-CZ,DTA124EEB,BD8317GWL,BD3508MUV,RB238NS100,BD950M5EFJ-C,BD450S2FP3-C,SML-S13YT,BD00FC0W,SML-010YT,DTA124EE3,BD50HC5VEFJ-M,BD60HA5VEFJ-,SML-H12D8T(C),BD81870MUF-M,RB168LAM-30,RFUH25TB3S,BD9B600MUV,DTD123YC,BM2P159PF,DTC024XUB,SML-P11DT (R),BD725L05G-C,DTA124ECA,RB168LAM-40,RSS065N06,DTD123YK,RH6E040BG,2SC2412K,BD25IC0V,BD25IC0W,BDJ2FC0W,LBP-602MA2,BD46EXX5G-M SERIES,FMY1A,BD7691FJ,BD82004FVJ-M,BDJ0GA3WNUX,BD450S5WFP2-C,SML-522MY8W,DAN222ZM,BM2P060MF-Z,RFS60TZ6S,DTC114YCA,RBR10BGE30A,RBR40NS60A,BH76809FVM,RRH100P03,SCT3105KL,DTC043ZEB,SCT3105KR,BD9060F-C,RQ6E080AJ,BA15DD0WT,RB168LAM-60,R6035KNZ4,DTC144EU3,2SA1037AK,RESD1CANY,DTC144EUB,SML-D13WW (C),BD2266G-M,DTC023EEB,SML-012PT (A),SML-S13DT,RBS1LAM40A,BD7690FJ,DTA143XCA,SMLP2,BSM180C12P2E202,RGTH60TS65D,BD50C0AFP-C,R6035VNX3,BD99950MUV,RE1J002YN,RF101LAM2S,BM61S41RFV-C,2SCR587D3,BD1HC500HFN-C,BU7205S,2SAR553P,BV1LE080EFJ-C,BV1LC150EFJ-C,SML-011DT,RS3E095BN,BD54105G-CZ,2SAR553R,RQ3E130BN,BU2FSA4WGWL,BD15HC5WEFJ,SML-812MT,DTA143XEB,BD9862MUV,BD52W03G-C,BD48W00G-C,DTA143XE3,SLI-325DU(W),LMR982,SLR343WBN2PT2□□□□□□,LMR981,BD37522FS,RB088BM150,RB088LAM100,2SAR552P,BD26503GUL,R8002KND3,2SCR512P5,QS8K2,BU7465S,RFNL15TJ6S,BD733L2FP-C,BD30KA5FP,LM8391EY,QS8J4,BD90C0AFP2-C,QS8J5,BD68710EFV,LB-402VN,BD50C0AWFP-C,BM1Z103FJ,2SAR554P,BD9060HFP-C,BC848BW,YQ30NL10SE,BR25G640,2SAR554R,RGTV80TS65,RB715FM-40,BD62120JEFJ,LB-402VD,RBR15BM30A,DTA124EKA,BA30JC5T,BA178M05FP,BD800M5WFPJ-C,SMLP2 SERIES,BD33IA5WEFJ,BAJ2DD0,2SCR523EBTL□□□,BDXXHC0WEFJ,DTB513ZM,RSDT27BM,SMLEN3WBC8W,BU33UV7NUX,SML-011UT(A),BU97550KV-M,RF101LAM4S,BM2P121X-Z,TE3004-TP1W00A,LBP-602MK2,RB078BM30S,BD8961NV,BD67173NUX,MG7901WZ,DTD123EK,SCS304AM,BU7461S,SCT3060ALHR,BD30FC0WFP,RB088LAM150,RGW00TS65DHR,YQ20BM10SD,RSS100N03,RQ6E045BN,2SAR552P5,BU7462S,RD3L220SN,BD7J101EFJ-LB,1SS390SMFHT2R,DTD123EC,DAN235FM,RFN2LAM6S,SCS215AJHR,BD65496MUV,KA2002-B05B70A,2SC5824,BU52272NUZ,2SC4102U3,BD9B300MUV,RB558WM,DTC114GU3,SML-D12Y1W,BU33SD2MG-M,RBQ15BM45A,BU7464S,BA178M18FP,RV3C002UN,BA178M05CP,SCS304AG,SLI-570 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SERIES,BU1ATD2WNVX,RB168MM100,BD8314NUV,BD9107FVM,BD34700FV,BD5466GUL,RF4E080BN,DTC144VCA,DAP202FM,SML-Z14YT (C),BA05CC0T,BA05CC0W,RF6G035BG,UT6KE5,SML-D13FW (C),BD60HC0VEFJ-M,BM2P134EF,BD00GA5VEFJ-M,BD30KA5WF,BU1JTD3W,BD60GA5VEFJ-LB,BD52XXNVX-2C,SML-D15YW (C),BM2P137TKF,MMBZ27VCLY,SML-811VT(A),BU90005GWZ,DTA123YM,RGWX5TS65D,LM358,ML62Q1714C,BA17815CP,BD16950EFV-C,KD3004-TQFW00A,RBR2LAM40A,DTC114WUA,BD33HA5WEFJ,BD00EA5W,UT6KC5,BD18340FV-M,LM324,ML62Q1713C,MCR10,RQ3G110AT,MNR12,MNR15,MNR14,2SCR586J,MNR18,SML-811VT(C),BM6242FS,BU28SA4WGWL,KA2003-B35N00A,MH2205WZ,RFS30TZ6S,LM339,LAP-601DB,BU7495,CSL1101WBDW,BD63536FJ,MNR02,QS6Z5,MNR04,STM 331U,BU1JTD2W,MC

选型指南 - ROHM - 2024 Edition - 12.2023 PDF 英文下载

SGMicro（圣邦微） SGM3798模拟开关官方数据手册

描述- SGM3798 Audio Headset Analog Switch with Reduced GND Switch RON and FM Capability.

型号- SGM3798YG/TR,SGM3798

数据手册 - SGMICRO - REV.A - 2017年1月 PDF 英文下载

SGM3798YTD Audio Headset Analog Switch with Reduced GND Switch RON and FM Capability

型号- SGM3798DBXXXXX,SGM3798YTD,SGM3798YTDB8G/TR

数据手册 - SGMICRO - REV.A.1 - MARCH 2019 PDF 英文下载

SGM3798YTDB8G/TR PcbLib & SchLib & IntLib

型号- SGM3798YTDB8G/TR

CAD模型库 - SGMICRO - 2023/10/23 RAR 英文下载

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

【应用】负信号模拟开关SGM3717可防止手机音频信号出现严重失真或被钳位的现象，带宽高达400Hz

在手机应用中，人们播放音频是有两种方式：一种是通过耳机播放，一种是通过扬声器播放。然而音频输出信号是有限的，所以需要通过模拟开关来实现音频信号的切换，以便用户选择不同的方式接收音频信号。本文推荐圣邦微双单刀双掷开关SGM3717。

应用方案发布时间 : 2023-05-30

求介绍两款以上成熟的KTV无线麦解决方案，

接近的解决方案可以参考下面的：1、电源系统低功耗LDO：SGM2032，SGM2036 Boost 芯片：SGM6601，SGM6605，SGM66051 Buck 芯片：SGM6012，SGM6013 Load switch：SGM2588，SGM2576 充电芯片：SGM4056，SGM41508 2、模拟开关 USB切换开关：SGM7227 音频切换开关：SGM3717，SGM3718，SGM3712 欧美标耳机切换开关：SGM3798，SGM2549 3、POP音抑制开关机POP音抑制：SGM4806，SGM4807，SGM4808 4、音频运放 MIC 前置放大：SGM721，SGM722，SGM5532，SGM4822，SGM4823 耳机放大器：SGM4917，SGM4918

技术问答发布时间 : 2018-09-25