Description
The WM7210 is a low-profile silicon digital microphone. It offers high Signal to Noise Ratio (SNR) and low power consumption and is suited to a wide variety of consumer applications.
The WM7210 incorporates Wolfsonās proprietary CMOS/MEMS membrane technology, offering high reliability and high performance in a miniature, low-profile package. The WM7210 is designed to withstand the high temperatures associated with automated flow solder assembly processes. (Note that conventional microphones can be damaged by this process.)
The WM7210 incorporates a high performance ADC, which outputs a single-bit Pulse Density Modulated (PDM) audio data stream. The WM7210 supports selectable left/right channel assignment for a two-channel digital microphone interface, enabling efficient connection of multiple microphones in stereo/array configurations.
Features
- High SNR; selectable sensitivity tolerance options
āĀ WM7210 ā SNR 58dB, Sensitivity +/-3dB - Low power
āĀ Sleep mode ā 2Ī¼A
āĀ Normal operation ā 650Ī¼A - Low profile packaging
- Support for automated flow solder assembly
- PDM digital audio output
- Stereo/array operation
- Proprietary ADC technology
āĀ Reduced clock jitter sensitivity
āĀ Low noise floor modulation
āĀ Stable in overload condition - Top port package
- 1.64V to 3.7V supply
- 4.00 x 3.00 x 1.03mm thin package design
Wolfson Microelectronics has an audio hub andĀ Class-D digital input speaker amplifierĀ chipset forĀ smartphones and tablet PCs.
The Scotland-based firm said it tackles theĀ audio quality issues caused by routing analogue signals over longer distances.
The WM8996 audio hubĀ incorporatesĀ an audio mixing methodology which handles multiple audio routings and concurrent use cases.
The chip includes a digital audio interface employing Pulse Density Modulation (PDM) protocol to connect digital microphones such as the WM7210 and WM7220 in addition to digital speaker amplifiers like the new WM9082.
The WM9082Ā Class-D speaker amplifier hasĀ PDM input capabilityĀ andĀ providesĀ 92dB SNR performance.
TheĀ 2.3mm sq chip canĀ drive up to 2.5W into a 4ohm speaker.
According to the supplier, theĀ PDM interface format eases the complexity of form-factor end product design without compromising audio quality as it provides the option to transfer data digitally.
For more read: Scottish chip firm Wolfson improves audio in smartphones
About The Author
Ibrar Ayyub
I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.
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