Motion Sensors
Products (26)
MP23ABS1TR - MEMS Microphone with Digital Output | STMicroelectronics
The MP23ABS1TR is a compact, low-power MEMS microphone from STMicroelectronics, featuring a digital PDM (Pulse Density Modulation) output. It is designed for high-performance audio capture in portable and consumer electronics, offering a signal-to-noise ratio (SNR) of 63 dB and a sensitivity of -26 dBFS. The device operates from a supply voltage of 1.6V to 3.6V, with a current consumption of 650 µA, making it suitable for battery-powered applications. A MEMS microphone is a micro-electromechanical system that converts acoustic pressure waves into electrical signals. Unlike traditional electret condenser microphones, MEMS microphones are manufactured using semiconductor fabrication techniques, enabling smaller footprints, higher consistency, and better temperature stability. The MP23ABS1TR belongs to the category of digital-output MEMS microphones, which integrate an analog-to-digital converter (ADC) and output a PDM stream, simplifying interface with digital signal processors (DSPs) and application processors. Key features of the MP23ABS1TR include a wide frequency response from 100 Hz to 10 kHz, a low current consumption of 650 µA, and a compact 3.5 mm x 2.65 mm x 0.98 mm package (LGA-4). The device also features a high PSRR (Power Supply Rejection Ratio) of 70 dB, ensuring minimal interference from power supply noise. The PDM output supports a clock frequency range of 1.2 MHz to 3.6 MHz, allowing flexible integration with various audio codecs and processors. The MP23ABS1TR is built on STMicroelectronics' advanced MEMS process, which ensures high reliability and performance consistency. The device includes a built-in low-noise amplifier and a sigma-delta modulator, providing a high-resolution digital output. The package is designed for reflow soldering, with a moisture sensitivity level (MSL) of 1, enabling robust manufacturing. Typical applications include smartphones, tablets, smart speakers, hearing aids, and IoT devices. In smartphones, the MP23ABS1TR is used for voice capture, noise cancellation, and beamforming. In smart speakers, it enables far-field voice recognition. The device's low power consumption makes it ideal for always-on voice trigger applications. When designing with the MP23ABS1TR, ensure proper acoustic port placement and PCB layout to minimize noise coupling. The PDM clock and data lines should be routed with controlled impedance and kept away from high-frequency digital signals. A decoupling capacitor of 100 nF should be placed close to the VDD pin to filter power supply noise.
MP23DB02HP - MEMS Digital Microphone, PDM Output | STMicroelectronics
The MP23DB02HP is a compact, low-power MEMS digital microphone from STMicroelectronics, featuring a PDM (Pulse Density Modulation) output interface. It is designed for high-performance audio capture in portable and embedded applications, delivering a signal-to-noise ratio (SNR) of 64 dB and a sensitivity of -26 dBFS. The microphone operates from a supply voltage of 1.6V to 3.6V, with a current consumption of only 0.9 mA, making it ideal for battery-powered devices. The package is a 4x3x1.08 mm MEMS package with a bottom port, ensuring easy integration into space-constrained designs. A MEMS microphone is a micro-electromechanical system that converts acoustic pressure waves into electrical signals. Unlike traditional electret condenser microphones (ECMs), MEMS microphones are manufactured using semiconductor fabrication techniques, offering higher consistency, smaller size, and better temperature stability. The MP23DB02HP belongs to the category of digital microphones, which integrate an analog-to-digital converter (ADC) and output a PDM stream, simplifying the interface to digital signal processors (DSPs) or microcontrollers. This digital output eliminates the need for external analog front-end components, reducing system complexity and improving noise immunity. Key features of the MP23DB02HP include a 64 dB SNR, which ensures clear audio capture with low background noise, and a wide frequency response from 20 Hz to 20 kHz, covering the full audible range. The PDM output supports a clock frequency range of 1.2 MHz to 3.6 MHz, allowing flexible interfacing with various audio codecs and processors. The microphone also features a selectable power mode (low-power and high-performance) via the L/R pin, enabling designers to trade off power consumption against performance. Additionally, the device has a high PSRR (power supply rejection ratio) of 80 dB, minimizing the impact of power supply noise on audio quality. Technically, the MP23DB02HP uses a capacitive sensing element with a dedicated ASIC that includes a preamplifier, ADC, and PDM interface. The MEMS membrane is designed to be highly sensitive while maintaining robustness against mechanical shock and vibration. The device is AEC-Q100 qualified, making it suitable for automotive applications such as in-cabin voice control and hands-free calling. The bottom port configuration allows for a sealed acoustic chamber, which can be optimized for specific frequency response characteristics. Typical applications include smartphones, smart speakers, hearing aids, and IoT devices where voice interaction and audio recording are essential. The low power consumption and small footprint make it particularly suitable for wearable devices and TWS earbuds. In automotive, it can be used for voice commands and noise cancellation in the cabin. When designing with the MP23DB02HP, ensure that the PDM clock is provided within the specified range and that the L/R pin is correctly configured to select the desired channel. Proper PCB layout with a dedicated ground plane and decoupling capacitor (100 nF) near the VDD pin is recommended to achieve optimal performance. The acoustic port should be protected from dust and moisture using a mesh or foam cover.