WM7210IMS/V WOLFSON [Wolfson Microelectronics plc], WM7210IMS/V Datasheet

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WM7210IMS/V

Manufacturer Part Number
WM7210IMS/V
Description
Top Port Digital Silicon Microphone
Manufacturer
WOLFSON [Wolfson Microelectronics plc]
Datasheet
w
DESCRIPTION
The WM7210 is a low-profile silicon digital microphone. It
offers high Signal to Noise Ratio (SNR) and low power
consumption and is suited to a wide variety of consumer
applications.
The
CMOS/MEMS
reliability and high performance in a miniature, low-profile
package. The WM7210 is designed to withstand the high
temperatures associated with automated flow solder
assembly processes. (Note that conventional microphones
can be damaged by this process.)
The WM7210 incorporates a high performance ADC,
which outputs a single-bit Pulse Density Modulated (PDM)
audio data stream. The WM7210 supports selectable
left/right channel assignment for a two-channel digital
microphone interface, enabling efficient connection of
multiple microphones in stereo/array configurations.
The WM7210E variant offers a tighter tolerance on the
microphone sensitivity, giving reduced variation between
parts. This removes the need for in-line production
calibration of part-to-part microphone variations.
BLOCK DIAGRAM
WOLFSON MICROELECTRONICS plc
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WM7210
membrane
incorporates
Top Port Digital Silicon Microphone
technology,
Wolfson’s
at
http://www.wolfsonmicro.com/enews
offering
proprietary
high
FEATURES
APPLICATIONS
High SNR; selectable sensitivity tolerance options
-
-
Low power
-
-
Low profile packaging
Support for automated flow solder assembly
PDM digital audio output
Stereo/array operation
Proprietary ADC technology
-
-
-
Top port package
1.64V to 3.7V supply
4.00 x 3.00 x 1.03mm thin package design
Mobile telephone handsets
Portable computers
Portable media players
Digital still cameras
Digital video cameras
Bluetooth headsets
Portable navigation devices
WM7210, WM7210E
WM7210 – SNR 58dB, Sensitivity +/-3dB
WM7210E – SNR 58dB, Sensitivity +/-1dB
Sleep mode - 2μA
Normal operation - 650μA
Reduced clock jitter sensitivity
Low noise floor modulation
Stable in overload condition
Preliminary Technical Data, January 2012, Rev 2.2
Copyright 2012 Wolfson Microelectronics plc

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WM7210IMS/V Summary of contents

Page 1

Top Port Digital Silicon Microphone DESCRIPTION The WM7210 is a low-profile silicon digital microphone. It offers high Signal to Noise Ratio (SNR) and low power consumption and is suited to a wide variety of consumer applications. The WM7210 incorporates ...

Page 2

WM7210 DESCRIPTION ....................................................................................................... 1 FEATURES ............................................................................................................ 1 APPLICATIONS ..................................................................................................... 1 BLOCK DIAGRAM ................................................................................................ 1 TABLE OF CONTENTS ......................................................................................... 2 PIN CONFIGURATION .......................................................................................... 3 PIN DESCRIPTION ................................................................................................ 3 ORDERING INFORMATION .................................................................................. 3 ABSOLUTE MAXIMUM RATINGS ........................................................................ 4 IMPORTANT ASSEMBLY GUIDELINES .............................................................. ...

Page 3

... PIN DESCRIPTION PIN NAME 1 VDD 2 LRSEL 3 CLK 4 DAT 5 GND ORDERING INFORMATION DEVICE DESCRIPTION WM7210IMS/V Standard Standard WM7210IMS/RV (tape and reel) WM7210IMSE/V Standard Enhanced Standard Enhanced WM7210IMSE/RV (tape and reel) Note: Reel Quantity = 4800 All devices are Pb-free and Halogen free. w TYPE Supply ...

Page 4

WM7210 ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at or beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical Characteristics ...

Page 5

Preliminary Technical Data ACOUSTIC AND ELECTRICAL CHARACTERISTICS Test Conditions: VDD=1.8V, 1kHz test signal, CLK=2.4MHz, T PARAMETER SYMBOL Directivity Sensitivity (WM7210) Sensitivity (WM7210E) Acoustic Overload Signal to Noise Ratio Total Harmonic Distortion Frequency response Acoustic Noise Floor Electrical Noise Floor Power ...

Page 6

WM7210 6. SLEEP Mode is enabled when the CLK input is below the CLK Sleep Frequency noted above. This is a power-saving mode. Normal operation resumes automatically when the CLK input is above the CLK Sleep Frequency. Note that the ...

Page 7

Preliminary Technical Data TYPICAL PERFORMANCE FREQUENCY RESPONSE 10.0 8.0 6.0 4.0 2.0 0.0 ‐2.0 ‐4.0 ‐6.0 ‐8.0 ‐10.0 10.0 THD RATIO w Sensitivity vs. Frequency (Relative to Sensitivity @ 1kHz) 100.0 1000.0 Frequency (Hz) WM7210 10000.0 PTD, Rev 2.2, January ...

Page 8

WM7210 APPLICATIONS INFORMATION RECOMMENDED EXTERNAL COMPONENTS It is recommended to connect a 0.1µF decoupling capacitor between the VDD and GND pins of the WM7210. A ceramic 0.1µF capacitor with X7R dielectric or better is suitable. The capacitor should be placed ...

Page 9

Preliminary Technical Data RECOMMENDED PCB LAND PATTERNS Figure 3 Recommended Customer PCB Land Pattern (Note that all other dimensions can be obtained from the package dimensions) w 1.30 WM7210 PTD, Rev 2.2, January 2012 9 ...

Page 10

WM7210 PACKAGE DIMENSIONS MS5: PACKAGE 4.00 x 3.00 x 1.03 mm BODY 0.1 C TOP VIEW 0. -C- A SIDE VIEW Symbols Dimensions (mm) MIN NOM 0.96 1.03 A 3.90 4.00 D 2.90 3.00 ...

Page 11

... Wolfson’s approval, licence, warranty or endorsement thereof. Any third party trade marks contained in this document belong to the respective third party owner. Reproduction of information from Wolfson datasheets is permissible only if reproduction is without alteration and is accompanied by all associated copyright, proprietary and other notices (including this notice) and conditions. ...

Page 12

WM7210 REVISION HISTORY DATE REV ORIGINATOR 25/09/09 1.0 5/3/10 1.1 25/10/10 2.0 27/1/11 2.1 PH 21/2/11 2.1 KC 06/09/11 2.1 JMacD 20/12/11 2 CHANGES ‘Top Port’ added to device title ENL abbreviation deleted from Electrical Characteristics Acoustic and ...

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