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T3902 Datasheet Preview

T3902 Datasheet

Microphone

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Bottom Port PDM LowPower MultiMode
Microphone With High AOP Mode
T3902
GENERAL DESCRIPTION
The T3902 is a lowpower, lownoise digital MEMS
microphone in a small package. The T3902 consists of a
MEMS microphone element and an impedance converter
amplifier followed by a fourthorder 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 LowPower modes.
The T3902 is available in a small 3.5 × 2.65 × 0.98 mm
surfacemount package. It is reflow solder compatible with
no sensitivity degradation.
APPLICATIONS
Smartphones
Microphone Arrays
Tablets
Cameras
Bluetooth Headsets
Notebook PCs
Security and Surveillance
FEATURES
SPEC
Sensitivity
SNR
Current
AOP
Clock
LOWPOWER
MODE
26 dB FS ±1 dB
63 dBA
185 µA
120 dB SPL
400 – 800 kHz
STANDARD
MODE
26 dB FS ±1 dB
64.5 dBA
430 µA
120 dB SPL
1.0 – 3.3 MHz
HIGH
PERFORMANCE
MODE
32 dB FS ±1 dB
64 dBA
650 µA
126 dB SPL
4.1 – 4.8 MHz
3.5 × 2.65 × 0.98 mm surfacemount package
Low power: 185 µA in LowPower Mode
Extended frequency response from 36 Hz to >20 kHz
Sleep Mode: 12 µA
High power supply rejection (PSR): 97 dB FS
Fourthorder Σ‐Δ modulator
Digital pulse density modulation (PDM) output
Compatible with Sn/Pb and Pbfree solder processes
RoHS/WEEE compliant
FUNCTIONAL BLOCK DIAGRAM
ORDERING INFORMATION
PART
MMICT390200012
EV_T3902FX
TEMP RANGE
40°C to +85°C
PACKAGING
13” Tape and Reel
InvenSense, Inc. reserves the right to change the detail
specifications as may be required to permit
improvements in the design of its products.
InvenSense Inc.
1745 Technology Drive, San Jose, CA 95110 U.S.A
+1(408) 988–7339
www.invensense.com
Document Number: DS000357
Revision: 1.0
Rev Date: 4/15/2020




TDK

T3902 Datasheet Preview

T3902 Datasheet

Microphone

No Preview Available !

T3902
TABLE OF CONTENTS
General Description ..................................................................................................................................................................... 1
Applications ................................................................................................................................................................................. 1
Features ....................................................................................................................................................................................... 1
Functional Block Diagram ............................................................................................................................................................ 1
Ordering Information................................................................................................................................................................... 1
Table of Contents.................................................................................................................................................................................... 2
Specifications .......................................................................................................................................................................................... 4
Table 1. Acoustical/Electrical Characteristics – General.............................................................................................................. 4
Table 2. Acoustical/Electrical Characteristics – HighPerformance Mode................................................................................... 4
Table 3. Acoustical/Electrical Characteristics – Standard Mode.................................................................................................. 5
Table 4. Acoustical/Electrical Characteristics – LowPower Mode .............................................................................................. 5
Table 5. Digital Input/Output Characteristics .............................................................................................................................. 6
Table 6. PDM Digital Input/Output.............................................................................................................................................. 6
Timing Diagram............................................................................................................................................................................ 7
Absolute Maximum Ratings .................................................................................................................................................................... 8
Table 7. Absolute Maximum Ratings ........................................................................................................................................... 8
ESD Caution ................................................................................................................................................................................. 8
Soldering Profile........................................................................................................................................................................... 9
Table 8. Recommended Soldering Profile*.................................................................................................................................. 9
Pin Configurations And Function Descriptions ..................................................................................................................................... 10
Table 9. Pin Function Descriptions............................................................................................................................................. 10
Typical Performance Characteristics..................................................................................................................................................... 11
Theory Of Operation ............................................................................................................................................................................. 12
PDM Data Format ...................................................................................................................................................................... 12
Table 10. T3902 Channel Setting ............................................................................................................................................... 12
PDM Microphone Sensitivity ..................................................................................................................................................... 12
Applications Information ...................................................................................................................................................................... 14
Low Power Mode....................................................................................................................................................................... 14
Dynamic Range Considerations ................................................................................................................................................. 14
Connecting PDM Microphones.................................................................................................................................................. 14
Sleep Mode................................................................................................................................................................................ 16
StartUp Time............................................................................................................................................................................. 16
Supporting Documents ......................................................................................................................................................................... 17
Application Notes ...................................................................................................................................................................... 17
PCB Design And Land Pattern Layout ................................................................................................................................................... 18
PCB Material And Thickness ...................................................................................................................................................... 18
Handling Instructions............................................................................................................................................................................ 19
Pick And Place Equipment ......................................................................................................................................................... 19
Document Number: DS000357
Revision: 1.0
Page 2 of 22



Part Number T3902
Description Microphone
Maker TDK
Total Page 3 Pages
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T3902 Datasheet PDF





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