admp401 Analog Devices, Inc., admp401 Datasheet

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admp401

Manufacturer Part Number
admp401
Description
Omnidirectional Microphone With Bottom Port And Analog Output
Manufacturer
Analog Devices, Inc.
Datasheet
Preliminary Technical Data
FEATURES
4.72 mm × 3.76 mm × 1.0 mm surface mount package
High SNR: 62 dBA
High sensitivity: −37 dBV
Flat frequency response from 100 Hz to over 12 kHz
Low current consumption: <200 μA
Single-ended analog output
High PSRR: >50 dB
Compatible with Sn/Pb and Pb-free solder processes
RoHS/WEEE compliant
APPLICATIONS
Cell phones
PC audio
Digital cameras
Bluetooth headsets
Rev. PrB
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
BACKPLATE
MEMBRANE
MEMS
MEMS
SIGNAL
MEMS
V
ASIC
BIAS
FUNCTIONAL BLOCK DIAGRAM
FILTER
BUFFER
REFERENCE VOLTAGE
Figure 1.
CHARGE
Omnidirectional Microphone with
BIAS CURRENT
PUMP
+
OUTPUT
DRIVER
Bottom Port and Analog Output
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
GENERAL DESCRIPTION
The ADMP401-1 is a high quality, low cost, low power analog
output bottom-ported omnidirectional MEMS microphone.
The ADMP401-1 consists of a MEMS microphone element and
an output amplifier. The ADMP401-1 has a high SNR and high
sensitivity, making it an excellent choice for far field applications.
The ADMP401-1 has a flat wideband frequency response
resulting in natural sound with high intelligibility. Low current
consumption enables long battery life for portable applications.
A built-in particle filter provides for high reliability.
The ADMP401-1 is available in a thin 4.72 mm × 3.76 mm ×
1.0 mm surface mount package. The ADMP401-1 is reflow
solder compatible with no sensitivity degradation.
GENERATOR
©2008 Analog Devices, Inc. All rights reserved.
OUTPUT
V
GND
DD
ADMP401-1
www.analog.com

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admp401 Summary of contents

Page 1

... Low current consumption enables long battery life for portable applications. A built-in particle filter provides for high reliability. The ADMP401-1 is available in a thin 4.72 mm × 3.76 mm × 1.0 mm surface mount package. The ADMP401-1 is reflow solder compatible with no sensitivity degradation. ...

Page 2

... ADMP401-1 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 4 ESD Caution .................................................................................. 4 Pin Configuration and Function Descriptions ............................. 5 Preliminary Technical Data   Typical Performance Characteristics ..............................................6   Handling Instructions .......................................................................7   Pick-and-Place Equipment ..........................................................7   Reflow Solder .................................................................................7   Board Wash ....................................................................................7   ...

Page 3

... Positive going (increasing) pressure on the membrane results in a positive going (increasing) output voltage. Test Conditions/Comments 1 kHz SPL 100 kHz 100 kHz 105 dB SPL 217 Hz, 100 mV p-p square wave super- imposed 1 Peak Rev. PrB | Page ADMP401-1 Min Typ Max Unit Omni −40 −37 −34 dBV 60 62 ...

Page 4

... ADMP401-1 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Rating Supply Voltage 3.6 V Sound Pressure Level (SPL) 160 dB Mechanical Shock 20,000 g Vibration Per MIL-STD-883G Temperature Range −40°C to +85°C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only ...

Page 5

... GND 3 GND 4 GND GND OUTPUT GND 2 1 GND 3 GND GND BOTTOM VIEW (TERMINAL SIDE DOWN) Not to Scale Figure 3. Pin Configuration (Bottom View) Description Analog Output Signal. Ground. Ground. Ground. Power Supply. Ground. Rev. PrB | Page ADMP401-1 ...

Page 6

... ADMP401-1 TYPICAL PERFORMANCE CHARACTERISTICS –2 –4 –6 –8 –10 100 1k FREQUENCY (Hz) Figure 4. Typical Frequency Response 0 100mV p-p SINE WAVE SUPERIMPOSED ON V –10 –20 –30 –40 –50 –60 10 10k Figure 5. Typical Power Supply Rejection Ratio vs. Frequency Rev. PrB | Page Preliminary Technical Data = 3 ...

Page 7

... Standard reflow solder conditions specified in Figure 2 can be used to attach the MEMS microphone to the PCB. BOARD WASH When washing the PCB, ensure that water does not make contact with the microphone port. Blow-off procedures and ultrasonic cleaning must not be used. Rev. PrB | Page ADMP401-1 ...

Page 8

... MEASURED AS TRUE POSITION OF POCKET, NOT POCKET HOLE. ORDERING GUIDE Model Temperature Range 1 ADMP401-1ACEZ-RL −40°C to +85°C 1 ADMP401-1ACEZ-RL7 −40°C to +85° RoHS Compliant Part. ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07712-0-10/08(PrB) 3. ...

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