The TDK InvenSense ICS-43434 is a high-performance digital MEMS microphone with a 24-bit I2S output interface, designed to connect directly to DSPs, microcontrollers and other digital processors without requiring an external audio codec.
The device integrates a MEMS acoustic sensor, signal conditioning circuitry, analog-to-digital converter, decimation and anti-aliasing filters, power management and an industry-standard I2S digital audio interface into a compact surface-mount package.
The ICS-43434 offers a typical 65dBA signal-to-noise ratio, -26dBFS ±1dB sensitivity, and an acoustic overload point of 120dB SPL. Its wide 60Hz to 20kHz frequency response enables accurate voice and broadband audio capture for a variety of consumer and embedded applications.
Multiple operating modes help balance audio performance and power consumption. In high-performance mode, typical current consumption is approximately 490µA, while low-power mode reduces typical current consumption to approximately 230µA. A sleep mode is also available for additional power savings.
The microphone operates from a 1.65V to 3.63V supply and features a compact 3.50 × 2.65 × 0.98 mm bottom-port surface-mount package, making it suitable for space-constrained portable and connected devices.
Key Features
- Manufacturer: TDK / InvenSense
- Part Number: ICS-43434
- Product Type: Digital MEMS Microphone
- Output Interface: I2S Digital Audio
- Digital Resolution: 24-bit
- Microphone Type: Omnidirectional
- Acoustic Port: Bottom Port
- Sensitivity: -26dBFS ±1dB
- Signal-to-Noise Ratio: 65dBA Typical
- Acoustic Overload Point: 120dB SPL
- Frequency Response: 60Hz to 20kHz
- Supply Voltage: 1.65V to 3.63V
- High-Performance Current: 490µA Typical
- Low-Power Current: 230µA Typical
- Sleep Current: 12µA Typical
- High-Performance Sample Rate: 23kHz to 51.6kHz
- Low-Power Sample Rate: 6.25kHz to 18.75kHz
- Package Size: 3.50 × 2.65 × 0.98 mm
- Mounting Type: Surface Mount
- Operating Temperature: -40°C to +85°C
- RoHS / WEEE Compliant
- Pb-Free Compatible
Typical Applications
- Wearable Devices
- IoT Devices
- Smart Televisions
- Remote Controls
- Teleconferencing Systems
- Voice Capture Systems
- Gaming Consoles
- Security Systems
- Embedded Audio Equipment
- Microphone Arrays
The ICS-43434 is suitable for compact digital audio designs requiring direct I2S connectivity, low power consumption, high SNR and reliable voice or broadband audio capture.
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