Three MEMS microphones from Infineon Technologies provide crystal-clear audio pickup for the quietest and loudest sounds. Combined with selectable power modes, the high-performance XENSIV IM73A135, IM72D128 and IM69D127 microphones are ideal for consumer electronics such as headphones with active noise cancellation, TWS earbuds and conferencing equipment with beamforming.
The IM73A135 analog microphone offers an excellent signal-to-noise ratio (SNR) of 73 dB(A) and an acoustic overload point (AOP) of 135 dB SPL (sound pressure level). Its digital counterpart, the IM72D128, has an SNR of 72 dB(A) and an AOP of 128 dB SPL. The IM69D127 digital microphone has similar performance, but is packaged in a tiny 3.6×2.5×1.0-mm package.
According to Infineon, all three devices have extremely low distortion (THD), even at high sound pressure levels, and are closely matched in phase and sensitivity between the devices. Each microphone is based on a hermetically sealed dual-membrane MEMS design for IP57 protection against water and dust ingress between the membrane and backplate.
The IM73A135 and IM69D127 microphones are priced at $2.08 and $1.81, respectively, in 1000-unit quantities.
