Le blog de l'entreprise Mingjiada Electronics Stock Supply of ICS-41351: TDK InvenSense Multi-Mode Low-Noise Digital MEMS Microphone

As the demands for voice interaction quality continue to rise in smartphones, TWS Bluetooth earphones, smart speakers and security surveillance equipment, high-performance MEMS microphones have become core components in audio front-end design. Shenzhen Mingjiada Electronics Co., Ltd. has long specialised in the distribution of electronic components and is now supplying the market with large quantities of the TDK InvenSense ICS-41351—a multi-mode, low-noise digital output MEMS microphone. We support both small-batch samples and large-volume orders, with same-day dispatch available for stock held in China.

I. Analysis of the ICS-41351’s Core Technology

The ICS-41351 is a digital multi-mode MEMS microphone launched by TDK InvenSense, comprising a MEMS microphone element, an impedance converter amplifier and a fourth-order Σ-Δ modulator. Its digital interface enables the time-division multiplexing of pulse density modulation (PDM) outputs from two microphones over a single data line, simplifying the system design of multi-microphone arrays.

ICS-41351 Key Specifications

Output Type: Digital, PDM

Sensitivity: –26 dB FS ±1 dB (1 kHz, 94 dB SPL)

Signal-to-noise ratio (SNR): 65 dB (typical)

Acoustic overload point (AOP): 120 dB SPL (10% THD)

Frequency response range: 50 Hz to 20 kHz

Operating voltage: 1.65 V to 3.63 V

Current consumption: 600 µA (standard mode); 230 µA (low-power mode); 12 µA (sleep mode)

Power supply rejection ratio: –90 dB (1 kHz, 100 mVp-p)

Package dimensions: 3.50 mm × 2.65 mm × 0.98 mm, surface-mount

Port orientation: Top

Operating temperature: -40°C to +85°C

Package type: LGA, 5-pin

The ICS-41351 maintains a high signal-to-noise ratio and an acoustic overload point of 120 dB SPL across all three operating modes—Low Power (AlwaysOn), Standard and Sleep—ensuring clear, undistorted audio output in a wide range of operating scenarios.

II. Key Technical Advantages of the ICS-41351

1. Flexible multi-mode switching, balancing performance and power consumption. The ICS-41351 supports three operating modes: low-power (AlwaysOn), standard and sleep. Designers can switch between these modes flexibly according to the end product’s usage scenarios. In AlwaysOn mode, the microphone continuously monitors ambient sound whilst consuming extremely low power, making it ideal for devices requiring ‘always-on’ functionality, such as smart speakers and voice assistants.

2. High AOP and high SNR, ensuring stable performance in demanding acoustic environments. The combination of an acoustic overload point of 120 dB SPL and a signal-to-noise ratio of 65 dB enables the ICS-41351 to maintain low-distortion audio capture even in noisy environments and high-volume scenarios, making it suitable for applications such as security surveillance and in-vehicle voice systems.

3. Compact packaging, suitable for space-constrained devices. The 3.5 mm × 2.65 mm × 0.98 mm surface-mount package is compatible with standard reflow soldering processes without causing any loss of sensitivity, providing an ideal audio capture solution for space-constrained products such as smartphones and TWS earphones.

4. PDM digital output, simplifying multi-microphone array design. Supports time-division multiplexing of output from two microphones over a single data line, reducing PCB routing complexity and system costs.

III. Typical Application Scenarios for the ICS-41351

Thanks to its outstanding overall performance, the ICS-41351 is widely used in the following areas:

Smartphones and tablets: Used as a primary microphone or noise-cancelling auxiliary microphone to deliver a clear voice call experience.

Microphone arrays: Multiple ICS-41351 units are combined to enable beamforming and far-field pickup, making them suitable for smart speakers and conference systems.

TWS Bluetooth earphones and Bluetooth earphones: Low-power mode extends battery life, whilst the compact package is well-suited to earphone housing designs.

Security and surveillance equipment: High AOP ensures stable audio capture in noisy outdoor environments.

Laptops and webcams: Provides a reliable audio front-end for video conferencing and speech recognition.

Wearable devices and drones: Lightweight packaging and low-power consumption meet the requirements of portable devices.

IV. Why choose Mingjiada Electronics as your supplier for the ICS-41351?

Established around 1996, Shenzhen Mingjiada Electronics Co., Ltd. is a comprehensive supplier specialising in the distribution of electronic components, with a product range covering all categories of electronic components, including integrated circuits, sensors, communication chips and modules. In the field of MEMS sensors, Mingjiada has established stable supply channels with leading global original equipment manufacturers such as TDK InvenSense, Bosch and ST, enabling it to provide customers with genuine, original MEMS microphone products.

With regard to the ICS-41351, a product that has reached the end-of-life (EOL) stage, Mingjiada Electronics’ supply advantages are evident in three areas:

Adequate stock: Whilst market availability of the ICS-41351 is currently limited, Mingjiada has built up sufficient stock through its established channels to meet customers’ ongoing production needs.

Rapid delivery: Domestic stock can be dispatched on the same day, effectively shortening customers’ procurement lead times.

Flexible minimum order quantities: We support both small-batch sample testing and large-volume orders.

Contact details: Should you have any procurement requirements for the ICS-41351, please contact Mingjiada’s e-commerce team to obtain the latest quotations and stock information. Tel: +86 13410018555; Email: sales@hkmjd.com.