Omnidirectional Microphone with

Bottom Port and Analog Output

Data Sheet

ADMP401

Rev. E

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FEATURES

4.72 mm × 3.76 mm × 1.0 mm surface-mount package

High SNR of 62 dBA

Sensitivity of −42 dBV

Flat frequency response from 100 Hz to 15 kHz

Low current consumption of <250 μA

Single-ended analog output

High PSR of 70 dB

Compatible with Sn/Pb and Pb-free solder processes

RoHS/WEEE compliant

APPLICATIONS

Smartphones and feature phones

Teleconferencing systems

Digital video cameras

Bluetooth headsets

Video phones

Tablets

FUNCTIONAL BLOCK DIAGRAM

OUTPUT

AMPLIFIER

ADMP401

POWER

VDD

GND

OUTPUT

Figure 1.

GENERAL DESCRIPTION

The ADMP4011 is a high quality, high performance, low power,

analog output, bottom-ported omnidirectional MEMS

microphone. The ADMP401 consists of a MEMS microphone

element, an impedance converter, and an output amplifier. The

ADMP401 sensitivity specification makes it an excellent choice

for both near field and far field applications. The ADMP401 has

a high SNR and flat wideband frequency response, resulting in

natural sound with high intelligibility. Low current consumption

enables long battery life for portable applications. The ADMP401

complies with the TIA-920 standard, Telecommunications

Telephone Terminal Equipment Transmission Requirements for

Wideband Digital Wireline Telephones.

The ADMP401 is available in a thin, 4.72 mm × 3.76 mm ×

1.0 mm surface-mount package. It is reflow solder compatible

with no sensitivity degradation. The ADMP401 is halide free.

1

Protected by U.S. Patents 7,449,356; 7,825,484; 7,885,423; 7,961,897. Other patents are pending.