Knowles SPH0644LM4H-1-T Bottom Port Digital MEMS Microphone

The SPH0644LM4H-1 is a miniature, high-performance, low power,
bottom port silicon digital microphone with a single bit PDM output.
Using Knowles’ proven high performance SiSonicTM MEMS
technology, the SPH0644LM4H-1 consists of an acoustic sensor, a low
noise input buffer, and a sigma-delta modulator. These devices
are suitable for applications such as cellphones, smart phones, laptop
computers, sensors, digital still cameras, portable music recorders,and
other portable electronic devices where excellent wideband audio
performance and RF immunity are required. In addition, the
SPH0644LM4H-1 offers multiple performance modes.

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Features
Highlights
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Key features

Low Distortion /High AOP
High SNR
Low Current Consumption in Low-Power Mode
Flat Frequency Response
High Drive Capability
RF Shielded
Bottom Port
Sensitivity Matching
Supports Dual Multiplexed Channels
Multiple Performance Modes (Sleep, LowPower, Normal)
Ultra-Stable Performance
Standard SMD Reflow
Omnidirectional
LGA Package

Applications

Consumer Eletronics

knowles-sensors-sph0644lm4h-1-t-digital-microphone datasheet 1

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The SPH0644LM4H-1 is a miniature, high-performance, low power, bottom port silicon digital microphone with a single bit PDM output. Using Knowles’ proven high performance SiSonicTM MEMS technology, the SPH0644LM4H-1 consists of an acoustic sensor, a low noise input buffer, and a sigma-delta modulator. These devices are suitable for applications such as cellphones, smart phones, laptop computers, sensors, digital still cameras, portable music recorders, and other portable electronic devices where excellent wideband audio performance and RF immunity are required. In addition, the SPH0644LM4H-1 offers multiple performance modes.

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