Evaluation Board for T3903 PDM Digital multi-mode microphone

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The T3903 is a multi-mode, low noise digital MEMS microphone in a small package. The T3903 consists of a MEMS microphone element and an impedance converter amplifier followed by a fourth-order Σ-Δ modulator. The digital interface allows the pulse density modulated (PDM) output of two microphones to be time multiplexed on a single data line using a single clock.

The T3903 has multiple modes of operation: High Quality, Low-Power (AlwaysOn), and Sleep. The T3903 has high SNR in all operational modes. It has 133 dB SPL AOP in High Quality Mode and 120 dB SPL AOP in Low-Power mode.

The T3903 is available in a standard 3.5 × 2.65 × 0.98 mm surface-mount package. It is reflow solder compatible with no sensitivity degradation.


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