INMP522

Ultra-Low Noise, Low Sensitivity Tolerance, PDM Digital Microphone

GENERAL DESCRIPTION

The INMP522* is an omnidirectional, bottom-ported, digital

output MEMS microphone with high performance, ultra-low

noise, and low power. The INMP522 has a sensitivity

tolerance of ±1 dB from part to part, making it ideal for

microphone array and beamforming applications.

The INMP522 consists of a MEMS microphone element and an

impedance converter amplifier followed by a fourth-order Σ-Δ

modulator. The digital interface enables the pulse density

modulated (PDM) output of two microphones to be time-

multiplexed on a single data line using a single clock. The

INMP522 is function- and pin-compatible with the INMP521 and

INMP421 microphones, providing an easy upgrade path.

The INMP522 has a very high signal-to-noise ratio (SNR) of

65 dBA and sensitivity of −26 dBFS, making it an excellent

choice for near- and far-field applications. The INMP522 has

an extended wideband frequency response, resulting in

natural sound with high intelligibility. Low current

consumption and a sleep mode with less than 2 µA current

consumption enables long battery life for portable

applications.

The INMP522 is available in a thin 4 × 3 × 1 mm surface-

mount package. It is reflow solder compatible with no

sensitivity degradation.

*Protected by U.S. Patents 7,449,356; 7,825,484; 7,885,423; and 7,961,897.

Other patents are pending.

APPLICATIONS

•

Smartphones and Feature Phones

•

Microphone Arrays

•

Tablet Computers

•

Teleconferencing Systems

•

Digital Still and Video Cameras

•

Bluetooth Headsets

•

Notebook PCs

•

Security and Surveillance

FEATURES

•

Sensitivity Tolerance of ±1 dB

•

Small, Thin 4 × 3 × 1 mm Surface-Mount Package

•

Omnidirectional Response

•

Very High SNR of 65 dBA

•

Sensitivity of −26 dBFS

•

Wide Frequency Response from 75 Hz to >20 kHz

•

Low Current Consumption of 800 µA

•

Sleep Mode for Extended Battery Life, <2 µA

•

Acoustic Overload Point of 116 dB SPL

•

High PSR of −83 dBFS

•

Fourth-Order Σ-Δ Modulator

•

Digital PDM Output

•

Sn/Pb and Pb-Free Solder Processes

•

RoHS/WEEE Compliant

FUNCTIONAL BLOCK DIAGRAM

ORDERING INFORMATION

PART

TEMP RANGE

INMP522ACEZ-R0*

−40°C to +85°C

INMP522ACEZ-R7†

−40°C to +85°C

EV_INMP522-FX

—

* – 13” Tape and Reel

† – 7” Tape and reel is to be discontinued. Contact sales@invensense.com for

availability.

INMP522

ADC

POWER

MANAGEMENT

CLK

DATA

PDM

MODULATOR

CHANNEL

SELECT

BOTTOM

TOP

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-INMP522-00

Revision: 1.1

Release Date: 05/14/2014