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TDK InvenSense
T3903 | Bottom Port PDM Digital Multi-Mode Microphone
T3903
The T3903 is a multi-mode, low noise digital MEMS microphone in a small package.
DESCRIPTION
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.
APPLICATIONS
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Smartphones
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Microphone Arrays
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Tablet Computers
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Cameras
FEATURES
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SPEC
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HIGH-QUALITY MODE
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LOW-POWER MODE
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Sensitivity
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−37 dB FS ±1 dB
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−26 dB FS ±1 dB
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SNR
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66 dBA
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63 dBA
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Current
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590 µA
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220 µA
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AOP
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133 dB SPL
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120 dB SPL
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Clock
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2.0 MHz to 3.3 MHz
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400 kHz to 800 kHz
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3.5 × 2.65 × 0.98 mm surface-mount package
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Extended frequency response from 40 Hz to >20 kHz
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Sleep Mode: 9 µA
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Fourth-order Σ-Δ modulator
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Digital pulse density modulation (PDM) output
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Compatible with Sn/Pb and Pb-free solder processes
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RoHS/WEEE compliant
Data Sheet Download
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T3093 Data Sheet
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*TDK InvenSense Authorized Distributor
