T3903
Bottom Port PDM Digital Output Multi-Mode Microphone
This document contains information on a preproduction
product. Specifications and information herein are
subject to change without notice
TDK Corporation
1745 Technology Drive, San Jose, CA 95110 U.S.A
+1(408) 988–7339
www.tdk.com
Document Number: DS-000358
Revision: 1.0
Release Date: 5/5/2020
GENERAL DESCRIPTION
The T3903 is a multi-mode, low noise digital MEMS
microphone in a small package. 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.
FUNCTIONAL BLOCK DIAGRAM
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
ORDERING INFORMATION
PART
TEMP RANGE
PACKAGING
MMICT3903-00-012
−40°C to +85°C
13” Tape and Reel
EV_T3903-FX
—
ICS-51360
ADC
POWER
MANAGEMENT
CLK
DATA
VD
D
GN
D
PDM
MODULATOR
CHANNEL
SELECT
SEL
EC
T
T3903
