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Home › Solutions › SmartSound › Digital Microphones › T3902 |
T3902Bottom Port PDM Low-Power Multi-Mode Microphone with High-AOP ModeThe 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. |
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| Product | Package Size | Output | Port Location | SNR (dBA) | AOP (dB SPL) | Sensitivity (dbfs) | LF Cutoff (Hz) | Status | Purchase |
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 T3902 | 3.5 × 2.65 × 0.98 | PDM | Bottom | 64.5 | 120 | -26 | 36 | Production |
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| Datasheet / Product Brief | Version | Updated | Download |
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| DS-000357 – T3902 Datasheet | 1.0 | 2020-04-15 |  |
| App Notes & User Guides | Version | Updated | Download |
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| AN-100 – MEMS Microphone Handling and Assembly Guide | 1.5 | 2017-07-12 |  |
| AN-1112 – Microphone Specifications Explained | 1.1 | 2016-06-15 | |
| AN-1124 – Recommendations for Sealing InvenSense Bottom-Port MEMS Microphones from Dust and Liquid Ingress | 1.0 | 2014-03-21 | |
| AN-1140 – Microphone Array Beamforming | 1.0 | 2013-12-31 | |
| AN-1003 – Recommendations for Mounting and Connecting InvenSense MEMS Microphones | 1.0 | 2013-12-31 | |
| Low Self Noise: The First Step to High-Performance MEMS Microphone Applications | 1.0 | 2013-12-31 | |
| Analog and Digital MEMS Microphone Design Considerations | 1.0 | 2013-12-31 | |
| Understanding Microphone Sensitivity | 1.0 | 2013-12-18 | |
| AN-000111 – Selecting PDM Microphone Clock Frequencies and Decimation Ratios | 1.0 | 2017-04-03 | |
| AN-0078 – High-Performance Digital MEMS Microphone Simple Interface to SigmaDSP Audio Codec | 1.0 | 2014-02-22 | |
| Inter-IC Digital Audio Interfaces | 1.0 | 2013-11-31 |  |
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