Miniature digital MEMS microphone MP43DT05. Free Technical Library News

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Miniature Digital MEMS Microphone MP43DT05

26.08.2018

STMicroelectronics' new MP34DT05TR-A digital microphone is designed for audio applications that require small footprint, high sound quality and wide dynamic range. The MP34DT05TR-A features a high sensitivity of -26 dBFS +-3 dB and a good signal-to-noise ratio of 64 dB.

The top entry port simplifies PCB design as no hole under the microphone is required to receive sound pressure. Due to the internal processing of the analog signal, a device with a digital microphone is less susceptible to interference and interference.

The MP34DT05TR-A microphone operates at 1,6V to 3,6V and has a low consumption of 650µA. The output signal is a PDM digital stream with a clock frequency of 1,2 to 3,25 MHz (set by the host). The microphone has an almost linear frequency response in the range from 100 to 10 Hz.

MEMS technology provides reliable microphone performance in a variety of automotive applications for voice control, as well as in industrial applications where operating conditions require high overload capacity and mechanical strength. MEMS technology reduces the size of the microphone, while the output can be either analog or digital.

Microphones based on MEMS technology provide excellent sound quality. They are less sensitive to mechanical vibrations, temperature changes and electromagnetic interference than traditional microphones. The MEMS process makes these mics the perfect stereo solution wherever two or more perfectly matched mics are required. MEMS microphones are omnidirectional, which means they are equally sensitive to sound coming from any direction in space. A wide frequency range makes it possible to use a MEMS microphone as a vibration sensor, including in the ultrasonic range.

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New temperature sensor for computer memory modules 26.12.2006

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This device measures temperature with an accuracy of +1°C, converts the measured value into digital format and transmits it via a PC-compatible interface. The MAX6604 monitors the temperature continuously and updates the data eight times per second. This method improves performance by providing a highly accurate measurement of module temperature. Analogues that use readings from sensors installed on motherboards to estimate the temperature of memory modules are much less accurate. The MAX6604 is available in miniature TDFN and TSSOP packages.

The device contains a three-address bus, which provides a choice of eight possible addresses. The combination of these features makes the MAX6604 an ideal choice for high performance notebook memory modules. The MAX6604 operates in a temperature range of -20...125°C and a supply voltage of 3,0...5,5 V. The LP3906 module is available in a 4x5mm 24-pin package.

The device has two high-efficiency regulators with a working current of 1,5 A and linear regulators with a working current of 300 A with a PC-compatible interface. The voltage regulators have a dynamically programmable voltage level from 0,8 V to 3,5 V with an efficiency of 96%. Linear regulators have a dynamically programmable wide-output voltage level from 1V to 3,5V.

Applications: broadband processors, peripheral processors (video and audio), I/O power, digital signal processors, programmable logic chips.

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