Fine Tune Sensitivity 2-wired Monaural Microphone Amplifier

Data Sheet


  • Supply Voltage (Vs = 8V to 16V)
  • Operating Voltage (VDD = 1.8V to 16V)
  • 2-wired connections
  • Built-in Pre-Amplifier (
    (FET Input for Impedance Converter) & Bias Circuit)
  • Voltage Gain Range (
    24dB to 40dB (Set by external resistors.))
  • Adjust and memorize the gain by 2-wire serial interface
  • Gain Adjustment (9dB ±3dB / 0.2dB step)
  • Maximum Output Voltage (2.1Vrms typ.)
  • Equivalent Input Noise Voltage (−111dBV typ.)
  • CMOS Technology
  • Package (MSOP10 (TVSP10))

General Description

The NJU72090 is a monaural microphone amplifier IC including pre-amplifier (impedance converter) for ECM microphone, gain adjuster and line amplifier. It is able to set the output gain by external resistors. And it is able to adjust and memorize the gain after parts assembling. The NJU72090 is the most suitable for the ECM especially which needs sensitivity accuracy.


  • Microphone module
  • Hands-free microphones
  • ECM module

Package Information

Part NumberPackage OutlinePLPPinsMaterial Declaration (RoHS/Halogen)Terminal FinishWeight(mg) (Reference)Reflow solderingFlow solderingIron solderingPacking ConditionMSLSolder Foot Print
NJU72090RB2MSOP10(TVSP10)-10-Sn2Bi19YesYesYesNon dry pack1

Sample & Buy

Part NumberPackagesStatusPacking SpecificationSampleBuy
NJU72090RB2MSOP10(TVSP10)(Active)Contact UsSales Support