GENERAL DESCRIPTION

The T3902 is a low‐power, low‐noise digital MEMS

microphone in a small package. The T3902 consists of a

MEMS microphone element and an impedance converter

amplifier followed by a fourth‐order Σ‐Δ modulator. The pulse

density modulated (PDM) interface allows two microphones

to be time multiplexed on a data line using a single clock.

The T3902 has multiple modes of operation: High

Performance, Low Power (AlwaysOn), Standard and Sleep.

The T3902 has low power and high SNR in all operational

modes. It has 126 dB SPL AOP in High Performance mode, and

120 dB SPL AOP in Standard and Low‐Power modes.

The T3902 is available in a small 3.5 × 2.65 × 0.98 mm

surface‐mount package. It is reflow solder compatible with

no sensitivity degradation.

FEATURES

 3.5 × 2.65 × 0.98 mm surface‐mount package

 Low power: 185 μA in Low‐Power Mode

 Extended frequency response from 36 Hz to >20 kHz

 Sleep Mode: 12 μA

 High power supply rejection (PSR): −97 dB FS

 Fourth‐order Σ‐Δ modulator

 Digital pulse density modulation (PDM) output

 Compatible with Sn/Pb and Pb‐free solder processes

 RoHS/WEEE compliant

APPLICATIONS

 Smartphones

 Microphone Arrays

 Tablets

 Cameras

 Bluetooth Headsets

 Notebook PCs

 Security and Surveillance