TDK InvenSense

Bottom Port PDM Digital Output Multi-Mode Microphone


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


*TDK InvenSense Authorized Distributor
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