【文章內(nèi)容簡(jiǎn)介】 lication will by suitable for production.2. Please make sure the bypass capacitor, C2 is as close as possible to the package. Figure 13: Application Example Using SPI with a chip scale packaged Device1. This application example is for illustration purposes only. TER makes no representation or warranty that such application will be suitable for production. 2. Please make sure all bypass capacitors are as close as possible to the package.3. Ground plane must be used to connect all VSSA pins together, .it a ground plane is not available then a short and low impedance path is necessary.4. Route ANA IN+ and ANA IN away from VCCD and VSSD return paths.5. Blazing for elect ret microphone must e from VCCD and VSSA .電氣參數(shù)極限參數(shù)與工作參數(shù)ConditionvalueConditionValueJunction temperature150℃VCCVSS to+Storage temperature range 65℃ to +150℃Commercial operating temperature range(1)0℃ to 70℃Voltage applied to any pin() to (Vcc+)Extended operating temperature(1)20℃ to +70℃Voltage applied to any pin(input current limited to +20mA)() to (Vcc+)Industrial operating temperature(1)40℃ to 85℃Voltage applied to MOSL,SCLK, and ss pins(input current limited to +20mA() to (Vcc+)Supply voltage (VCC) (2)+ to +Lead temperature (soldering –10 seconds)300℃Ground voltage(VSS) (3)0v1. Case temperature.2. VCCVCCAVCCD.3. VSS=VSSA=VSSD.1. stresses above those listed may cause permanent damage to the device. Exposure to the absolute maximum ratings may affect device reliability. Functional operation is not implied at these 2. 直流參數(shù)SymbolParameters Min(2)Typ(1)Max(2)unitsconditionsVILInput Low voltageVCC*VVIHInput High voltageVCC*VVOLCutput low voltageVICL=10uAVOL1RAC, INT Output low voltageVICH=10uAVCHOutput high voltageVICL=1mALCCVcc current(operating)playbackrecord15253040mAmAREXT=∝(3)REXT=∝(3)LSSVcc Current (standby)110uA(3)(4)LLLInput Lockage Current+1uALHZMISO Tristate current110uAREXTOutput load impedance5KΩRANA IN+ANA IN+ input Resistance71KΩRANA INANA ININPUT Resistance4056KΩAARPANA IN+or ANA IN and out gain25dB(5)1. Typical values: Ta=25℃ and .2. All min/max limits are guaranteed by TER via electrical testing or characterization. Not all specifications are 100 percent fasted.3. .VCCA and VCCD connected together.4. VCCA and VCCD. XCLK=MOSI=VSSA=VSSD and all other pins floating5. Measured with Auto Mute feature disabled.3. 交流參數(shù)Symbol characteristicMin(2)Typ(1)MAX(2)UnitsconditionsFSSampling 　ISD400304MFrequency 　ISD400305M 　ISD400306M 　ISD400308MKHzKHzKHzKHz(5)(5)(5)(5)FCFFilter pass band 　ISD400304MISD400305M 　ISD400306M 　ISD400308MKHzKHzKHzKHz3dB Rolloff point(3)(7)3dB Rolloff point(3)(7)3dB Rolloff point(3)(7)3dB Rolloff point(3)(7)TRECRecord Duration ISD400304M ISD400305M ISD400306M ISD400308M4568MinMinMinMin(6)(6)(6)(6)Symbol characteristicMin(2)Typ(1)MAX(2)UnitsconditionsTPLAYPlayback Duration ISD400304M ISD400305M ISD400306M ISD4003B08M 4568minminminmin(6)(6)(6)(6)TPUDPowerUp Delay 　ISD4003B04M ISD4003B05M ISD4003B06M ISD4003B08M2550msecmsecmsecmsecTSTCP or TPAUSEStop or Pause in ISD4003B04Mrecord or play ISD4003B05M ISD4003B06M ISD4003B08M5075100msecmsecmsecmsecTRACRAC Clock period ISD4003B04M ISD4003B05M ISD4003B06M ISD4003B08M200250300400msecmsecmsecmsec(10)(10)(10)(10)TRACLORAC Clock low ISD4003B04MTime ISD4003B05M ISD4003B06M ISD4003B08M2550msecmsecmsecmsecTRACMRAC Clock Period ISD4003B04MIn Massage ISD4003B05MCueing MADE ISD4003B06M ISD4003B08M125250usecusecusecusecTRACMLARC Clock low ISD4003B04MTime in Massage ISD4003B05MCueing mode ISD4003B06M ISD4003B08MusecusecusecusecTHDTotal Harmonic Distortion1%@1KHzVINANA IN Input voltagemVPecktopeak(4)(8)(9)1. Typical values: Ta=25℃ and 2. All min/max limits are guaranteed by TER via electrical testing at characterization. Not all specifications are 100 percent tested.3. Lowfrequency cut off depends upon the value of external capacitors (see pin Descriptions)4. Singleended input made, in the differential input mode, Vin maximum for ANA IN +and ANA IN is 16 mvpp.5. sampling frequency can vary as much as + percent over the mercial temperature, and voltage tangs, and –6/+4 percent over the extended temperature, industrial temperature and voltage ranges, for greater stability. An external clock can be untilled (see pin descriptions)二、低電壓音頻功放電路概述 LS386音頻功率放大器主要應(yīng)用于低電壓消費(fèi)類產(chǎn)品。為使外圍元件最少，電壓增益內(nèi)置為20。但是在1腳和8腳之間增加一只外接的電阻和電容，便可將電壓增益調(diào)整為任意值，直至200。輸入端以地為參考，同時(shí)輸出端被自動(dòng)偏置到電源電壓的一半。在6V電源電壓下，它的靜態(tài)功耗盡為24mw，使得LS386特別適合于電池供電的場(chǎng)合。 LS386的封裝形式為8引腳雙列塑封直三、電路設(shè)計(jì)原理圖 下面對(duì)該電路做具體分析（1） 電源電路具有正、負(fù)電壓輸出的穩(wěn)壓電源由圖可知，電源變壓器天帶有中心抽頭并接地，輸出端得到大小相等、極性相反的電壓。為了得到可調(diào)輸出電壓值，所以加入了三端可調(diào)集成穩(wěn)壓器，為了使電路正常工作，一般輸出電流不小于5mA。輸入電壓范圍在2~40v之間，~37V這間調(diào)整,所以方便了電路中需要多個(gè)電源供電的情況. （2） 功放電路LM386是目前使用較為廣泛的一種音頻功