T3902 Overview
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.
T3902 Key Features
- 26 dB FS ±1 dB 63 dBA 185 µA
- 800 kHz
- 26 dB FS ±1 dB 64.5 dBA 430 µA 120 dB SPL
- 3.3 MHz
- 32 dB FS ±1 dB 64 dBA 650 µA
- 4.8 MHz
- 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