SPH0641LU4H
Goertek SPH0641LU4H digital MEMS microphone with 64dB SNR and PDM output for modern digital systems.
Product Overview
Description
The SPH0641LU4H is a high-performance digital MEMS microphone featuring 64dB SNR and PDM (Pulse Density Modulation) output. The integrated ADC simplifies system design and reduces noise pickup.
This microphone delivers excellent audio quality for voice recognition, voice assistants, and digital audio recording. The digital output eliminates analog signal chain noise and enables long PCB traces without signal degradation.
With low power consumption and compact 3.76mm x 2.95mm package, the SPH0641LU4H is ideal for smartphones, smart speakers, IoT devices, and voice-controlled applications.
Product Series
SPH
Primary Application
Smartphones
Key Features
- 64dB signal-to-noise ratio
- PDM digital output
- Integrated ADC
- Compact 3.76mm x 2.95mm package
- Low power consumption 200μA
- Industrial temperature range
Specifications
| Type | Digital MEMS Microphone |
|---|---|
| Output | PDM |
| SNR | 64dB |
| Sensitivity | -26dBFS |
| Frequency Range | 100Hz - 10kHz |
| Current Consumption | 200μA |
| Operating Voltage | 1.5V - 3.6V |
| Package | 3.76mm x 2.95mm x 1.1mm |
| Temperature Range | -40°C to +85°C |
Applications
Smartphones
Electronic system design
Smart speakers
Electronic system design
Voice assistants
Electronic system design
IoT devices
Electronic system design
Voice recognition
Electronic system design
FAE Expert Insights
"The SPH0641LU4H is my go-to recommendation for digital MEMS microphone applications. The PDM output simplifies system design by eliminating the need for external ADC and analog front-end. I have used this microphone in numerous IoT and smart speaker projects with excellent results. The digital interface is robust against noise and enables flexible PCB layout. For modern digital systems, the SPH0641LU4H is an excellent choice."
Digital MEMS microphone with PDM output for modern systems
— Senior FAE Team, BeiLuo
Frequently Asked Questions
What is PDM output in SPH0641LU4H?
PDM (Pulse Density Modulation) is a digital audio format where the microphone outputs a high-frequency bitstream representing the audio signal. The density of pulses corresponds to the audio amplitude. PDM simplifies system design by integrating the ADC in the microphone. Contact BeiLuo FAE team for additional guidance and support.
PDM simplifies design by integrating ADC in microphone.
How do I interface SPH0641LU4H with my processor?
The SPH0641LU4H PDM output connects to processors with PDM interface or dedicated audio codecs. Most modern application processors and DSPs support PDM input. The interface requires clock input (typically 1-3MHz) and outputs data on a single wire. Contact BeiLuo FAE team for additional guidance and support.
Verify your processor supports PDM input.
Can I connect multiple SPH0641LU4H microphones?
Yes, multiple SPH0641LU4H microphones can share the same clock line while using separate data lines. This enables microphone arrays for beamforming applications. Some processors support multiple PDM data inputs with a single clock. Contact BeiLuo FAE team for additional guidance and support.
Multiple microphones can share clock with separate data lines.
What decimation filter should I use with SPH0641LU4H?
The SPH0641LU4H outputs PDM at high frequency (typically 1-3MHz) which needs decimation to standard audio rates (16-48kHz). Most processors with PDM input have built-in decimation filters. For custom implementations, use a sinc filter or dedicated audio codec with PDM input. Contact BeiLuo FAE team for additional guidance and support.
Use processor's built-in decimation or dedicated audio codec.
What is the lead time for SPH0641LU4H?
Standard lead time for SPH0641LU4H is 8-12 weeks for production quantities. Samples are typically available from stock with 1-2 week delivery. Contact sales for current availability. Contact BeiLuo FAE team for additional guidance and support.
Plan 12-week lead time for production orders.
How does SPH0641LU4H compare to Knowles SPH0641?
The SPH0641LU4H is functionally compatible with Knowles SPH0641 digital MEMS microphone. Both offer similar specifications: 64dB SNR, PDM output, and equivalent package size. The Goertek version provides competitive pricing with local technical support. Contact BeiLuo FAE team for additional guidance and support.
Direct replacement for Knowles SPH0641 with competitive pricing.