NSC6270:MEMSMicrophonePreamp
NOVOSENSE
Datasheet(EN)1.2
ProductOverview
TheNSC6270isapre-amplifierforMEMSMicrophone.TheNSC6270hasintegratedlownoisebias
circuitforMEMSmicrophone,andhighperformanceanalogpre-amplifierdeliverthegenuinesound
qualityandsupportflexiblemicrophonesystems.Bothofthebiasvoltageandtheanalogpre-amplifier
gaincanbetrimmedbytheinternalfusebanks(OTP),sotheNSC6270cansupportMEMStransducers
withdifferentparameters.Italsoimprovestheyieldandprovidebetterconsistencyofsensitivity.The
NSC6270hastwooutputpadsforbiasvoltagewithdifferentlocation,eitherofwhichischosendepending
onthelocationoftopplateofMEMSmicrophone.
KeyFeatures
?OperatingVoltage1.6V~3.6V
?CurrentConsumption120uAtyp.
?Inputequivalentnoise3μVrms(-110dBV)
?MaximumoutputVoltage530mVrms(-5.5dBV)atTHD10%
?Gain(OTPtrimming)-4.0dB~11dBwith0.5dB/Step
?Frequencyresponse20Hz~20kHz
?BiasVoltage7.5V~15Vwith0.3V/Step
?Operatingtemperature-40oC~85oC
?PackageChip(Wafer)
Applications
?PortableAudioequipment
?MEMSMicrophonemodule
?CellularPhone
BlockDiagram
BIAS2VDD
61
1VDDPowerSupply
BIAS14ChargeVREG2OUTOutput(Analogoutput)
Pump
3GNDGround
MICIN5Preamp2OUT