Components

	T3902 TDK InvenSense	x 1
	CL05B104KP5VPNC Samsung Electro-Mechanics	x 1
	Conn_01x05_Pin	x 1

Tools, APP Software Used etc.

KiCad 8.0

KiCad

Description

T3902 Microphone Module PDM Interface 🎤

🎤 T3902 Module Board 🎤

This compact module board, measuring 14.5mm in height and 12.5mm in width, is built around the T3902, a low-power, low-noise digital MEMS microphone. The T3902 combines a MEMS microphone element, an impedance converter amplifier, and a fourth-order Σ-Δ modulator, delivering high-quality audio with a PDM interface that supports time-multiplexing for two microphones on a single data line.

It features multiple modes: High Performance (126 dB SPL AOP), Low Power (AlwaysOn), Standard (120 dB SPL AOP), and Sleep, ensuring flexibility for various applications. With low power consumption, high SNR, and robust acoustic performance, this board is ideal for IoT, wearables, and portable electronics, offering reliable audio capture in a small, efficient design.

🔗More details of the T3902.

Schematic and Layout

Schematic

Schematic.pdf

CAD-Custom parts and enclosures

T3902_Microphone_Module.step

Download Gerbers Download BOM(Bill of materials)

Feb 05,2025

832 views

T3902 Microphone Module PDM Interface 🎤

Bottom Port PDM Low-Power Multi-Mode Microphone with High-AOP Mode

832

Published: Feb 05,2025

Standard PCB

Download Gerber file 5

BOM(Bill of materials)

Centroid file

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Only PCB

PCB+Assembly

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