The T4078 is an analog MEMS microphone with very high dynamic range and a low-power AlwaysOn mode. The T4078 includes a MEMS microphone element, an impedance converter, and an output amplifier.

This microphone features a low-power mode, which is active when the supply voltage is <1.9V. In this mode, the T4078 operates with max. 85 μA

Other specifications in high performance mode include 135 dB SPL acoustic overload point, tight ±1 dB sensitivity tolerance and 66 dB(A) SNR.

The T4078 is available in a very small 3.35 mm × 2.5 mm × 0.98 mm bottom port surface-mount package.

MPN: MMICT4078-00-908

Product Details

Part # Market Status Output Port Location SNR AOP Sensitivity Package Size LF Cutoff
UNITS: dBA dB SPL dBV (mm) Hz
Production Analog Bottom 66 135 -38 3.35 x 2.5 x 0.98 N/A


  • Analog output
  • −38 dBV sensitivity
  • ±1 dB sensitivity tolerance
  • 90 dB PSRR
  • 3.35 × 2.5 × 0.98 mm surface-mount package
  • Compatible with Sn/Pb and Pb-free solder processes
  • RoHS compliant