Omnidirectional Microphone with Bottom Port and I
2
S Digital Output
GENERAL DESCRIPTION
The INMP441 is a high-performance, low power, digital-output,
omnidirectional MEMS microphone with a bottom port. The
complete INMP441 solution consists of a MEMS sensor, signal
conditioning, an analog-to-digital converter, anti-aliasing filters,
power management, and an industry-standard 24-bit I²S interface.
The I²S interface allows the INMP441 to connect directly to digital
processors, such as DSPs and microcontrollers, without the need
for an audio codec in the system.
The INMP441 has a high SNR, making it an excellent choice for
near field applications. The INMP441 has a flat wideband
frequency response, resulting in natural sound with high
intelligibility.
The INMP441 is available in a thin 4.72 × 3.76 × 1 mm surface-
mount package. It is reflow- solder compatible with no sensitivity
degradation. The INMP441 is halide free.
*Protected by U.S. Patents 7,449,356; 7,825,484; 7,885,423; and 7,961,897.
Other patents are pending.
APPLICATIONS
• Teleconferencing Systems
• Remote Controls
• Gaming Consoles
• Mobile Devices
• Laptops
• Tablets
• Security Systems
FEATURES
• Digital I²S Interface with High-Precision 24-Bit Data
• High SNR of 61 dBA
• High Sensitivity of -26 dBFS
• Flat Frequency Response from 60 Hz to 15 kHz
• Low Current Consumption of 1.4 mA
• High PSR of -75 dBFS
• Small 4.72 × 3.76 × 1 mm Surface-Mount Package
• Compatible with Sn/Pb and Pb-Free Solder Processes
• RoHS/WEEE Compliant
FUNCTIONAL BLOCK DIAGRAM
ORDERING INFORMATION
* – 13” Tape and Reel
† – 7” Tape and reel to be discontinued. Contact sales@invensense.com
for
availability.
INMP441
ADC
POWER
MANAGEMENT
SCK
SD
WS
GND
GND
GND
VDD
FILTER
I
2
S
SERIAL
PORT
HARDWARE
CONTROL
L/R
CHIPEN
InvenSense 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: DS-INMP441-00
Revision: 1.1
Rev Date: 05/21/2014
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