Meet the microphones that save power, capture sound and work in different conditions, used in headphones, smart devices and multi-microphone setups.
Many portable devices struggle with capturing audio while keeping power consumption low and ensuring reliability in different environments. Infineon Technologies AG’s IM72D128V and IM69D129F digital PDM microphones solve these problems by delivering audio performance, energy efficiency, and robustness, especially in space-constrained applications.
The IM72D128V delivers a Signal-to-Noise Ratio (SNR) of 71.5 dB(A), making it suitable for applications that require low-noise audio pick-up. It operates at low power consumption, drawing 430 µA in high-performance mode and 160 µA in low-power mode. This makes it suited for battery-powered devices such as headphones. With smaller footprint, it fits in most space-constrained consumer devices.
The IM69D129F is also designed for compact devices. It provides audio performance with an SNR of 69 dB(A) and low power consumption, operating at 450 µA in high-performance mode and 170 µA in low-power mode, supporting battery life in portable devices. Its size makes it suited for multi-microphone designs in compact systems. These devices are used for Active Noise Cancellation (ANC) headphones and earbuds, audio capturing in laptops, tablets, conference systems, and cameras.
Both microphones use Infineon’s Sealed Dual Membrane (SDM) technology, achieving resistance to water and dust (IP57), which makes them suited for different environments. The microphones are part of Infineon’s XENSIV MEMS microphone family, offering audio quality, low power consumption, and durability. They support Voice User Interface (VUI) applications in smart speakers, automotive infotainment, IoT devices, and home and industrial automation. Both microphones can be used in industrial or home monitoring applications requiring audio pattern detection, such as industrial monitoring and home security systems.
The microphones are equipped with a preamplifier and a sigma-delta ADC, providing digital PDM output for integration into audio systems. Both microphones offer an 11 Hz flat frequency response for sound reproduction and a ±1 dB sensitivity tolerance, making them suited for multi-microphone arrays. They can be used for far-field audio pick-up or in portable devices, enabling audio capture in challenging environments while improving energy efficiency and reliability.
