EVAL-ADMP404Z AD [Analog Devices], EVAL-ADMP404Z Datasheet

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EVAL-ADMP404Z

Manufacturer Part Number
EVAL-ADMP404Z
Description
Omnidirectional Microphone with Bottom Port and Analog Output
Manufacturer
AD [Analog Devices]
Datasheet
FEATURES
Tiny 3.35 mm × 2.50 mm × 0.88 mm surface-mount package
High SNR of 62 dBA
High sensitivity of −38 dBV
Flat frequency response from 100 Hz to 15 kHz
Low current consumption: <250 µA
Single-ended analog output
High PSRR of 70 dB
Compatible with Sn/Pb and Pb-free solder processes
RoHS/WEEE compliant
APPLICATIONS
Smartphones and feature phones
Digital video cameras
Bluetooth headsets
Video phones
Teleconferencing systems
Rev. PrH
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.
Preliminary Technical Data
BACKPLATE
MEMBRANE
FUNCTIONAL BLOCK DIAGRAM
MEMS
OUTPUT AMPLIFIER
Figure 1.
ADMP404
CONVERTER
Omnidirectional Microphone with
IMPEDANCE
ASIC
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 ADMP404 is a high quality, low cost, low power, analog
output bottom-ported omnidirectional MEMS microphone.
The ADMP404 consists of a MEMS microphone element, an
impedance converter, and an output amplifier. The ADMP404
sensitivity specification makes it an excellent choice for both
near field and far field applications. The ADMP404 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. A built-in
particle filter provides high reliability. The ADMP404 complies
with the TIA-920 Telecommunications Telephone Terminal
Equipment Transmission Requirements for Wideband Digital
Wireline Telephones standard.
The ADMP404 is available in an ultraminiature 3.35 mm ×
2.50 mm × 0.88 mm surface-mount package. It is reflow solder
compatible with no sensitivity degradation. The ADMP404 is
halide free.
V
OUTPUT
GND
DD
©2010 Analog Devices, Inc. All rights reserved.
ADMP404
www.analog.com

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EVAL-ADMP404Z Summary of contents

Page 1

Preliminary Technical Data FEATURES Tiny 3.35 mm × 2.50 mm × 0.88 mm surface-mount package High SNR of 62 dBA High sensitivity of −38 dBV Flat frequency response from 100 kHz Low current consumption: <250 µA Single-ended ...

Page 2

ADMP404 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 4 ESD Caution .................................................................................. 4 Pin Configuration and Function Descriptions ...

Page 3

Preliminary Technical Data SPECIFICATIONS T = 25° 1.8 V, unless otherwise noted. All minimum and maximum specifications are guaranteed. Typical specifications are not A DD guaranteed. Table 1. Parameter Symbol PERFORMANCE Directionality Sensitivity Signal-to-Noise Ratio SNR Equivalent Input ...

Page 4

ADMP404 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Rating Supply Voltage 3.6 V Sound Pressure Level (SPL) 160 dB Mechanical Shock 10,000 g Vibration Per MIL-STD-883 Method 2007, Test Condition B Temperature Range −40°C to +70° Table 3. Recommended ...

Page 5

Preliminary Technical Data PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic 1 OUTPUT 2 GND GND 1 OUTPUT ADMP404 TOP VIEW (TERMINAL SIDE DOWN) Not to Scale Figure ...

Page 6

ADMP404 TYPICAL PERFORMANCE CHARACTERISTICS –2 –4 –6 –8 –10 100 1k FREQUENCY (Hz) Figure 4. Frequency Response Mask 0 –10 –20 –30 –40 –50 –60 –70 –80 100 1k FREQUENCY (Hz) Figure 5. Typical ...

Page 7

Preliminary Technical Data APPLICATIONS INFORMATION The ADMP404 output can be connected to a dedicated codec microphone input (see Figure high input impedance gain stage (see Figure 8). A 0.1 µF ceramic capacitor (C1 placed ...

Page 8

ADMP404 PCB LAND PATTERN LAYOUT The recommended PCB land pattern for the ADMP404 should be laid out to a 1:1 ratio to the solder pads on the microphone package, as shown in Figure 9. Care should be taken to avoid ...

Page 9

Preliminary Technical Data HANDLING INSTRUCTIONS PICK AND PLACE EQUIPMENT The MEMS microphone can be handled using standard pick- and-place and chip shooting equipment. Care should be taken to avoid damage to the MEMS microphone structure as follows: • Use a ...

Page 10

ADMP404 RELIABILITY SPECIFICATIONS The microphone sensitivity after stress must deviate by no more than ±3 dB from the initial value. Table 5. Stress Test Low Temperature Operating Life High Temperature Operating Life THB Temperature Cycle High Temperature Storage Low Temperature ...

Page 11

... Figure 11. 3-Terminal Chip Array Small Outline No Lead Cavity [LGA_CAV] ORDERING GUIDE Model Temperature Range 1 ADMP404ACEZ −40°C to +70°C ADMP404ACEZ-RL −40°C to +70°C ADMP404ACEZ-RL7 −40°C to +70°C EVAL-ADMP404Z Z = RoHS Compliant Part. 1 This package option is halide free. 2 0.75 REF 1.52 0.30 BSC 1 2.575 0.54 REF 2 ...

Page 12

ADMP404 NOTES ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. PR09027-0-4/10(PrH) Preliminary Technical Data Rev. PrH | Page ...

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