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SPH0641LM4H data sheet - .PDF file.

The SPH0641LM4H-1 from Knowles Acoustic is a digital bottom port MEMS microphone with high signal-to-noise (SNR) ratio, multiple modes and low-power consumption. It is said to be ideal for consumer electronics.

The microphone enables voice-controlled applications and maximises battery life.

The SPH0641LM4H-1 utilises Knowles’ low-power ‘Always On, Always Listening’ technology to provide a high-SNR component with extremely low-power draw — lower than the conventional analogue microphone and analogue-to-digital converter combination.

The digital multi-mode microphone adds value to consumer electronics by delivering up to three times less power consumption than other digital microphones and is 20 per cent smaller in size.

The SPH0641LM4H-1 supports a longer battery life and enables accurate voice recognition in various settings such as social gatherings and sporting events.

Click on the link above to download the data sheet.

Key features and specifications

  • Superwide-band capable
  • Multiple performance modes (sleep, low power and standard)
  • Low current consumption
  • Sensitivity matching
  • Signal-to-noise ratio: nominal 64.3 dB(A)
  • Flat frequency response: up to 20kHz
  • Power consumption: 235µA in low-power mode
  • Size: more than 20 per cent smaller than other digital microphones
  • Sensitivity matching: -26 ±1dBFS
  • Digital output: serial PDM bit stream

Knowles Acoustics

Knowles Corporation (NYSE: KN) is a market leader and global supplier of advanced micro-acoustic solutions and specialty components serving the mobile communications, consumer electronics, medical technology, military, aerospace and industrial markets. Knowles has a leading position in micro-electro-mechanical systems microphones, speakers and receivers which are used in smartphones, tablets and mobile handsets. Knowles is also a leading manufacturer of transducers used in hearing aids and other medical devices and has a strong position in oscillators (timing devices) and capacitor components which enable various types of communication. Knowles' focus on the customer, combined with unique technology, rigorous testing and global scale, helps to deliver innovative solutions and consistently dependable and precise products. Founded in 1946 and headquartered in Itasca, Illinois, Knowles has more than 10,000 employees in 36 locations around the world.

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