WM7130A WOLFSON [Wolfson Microelectronics plc], WM7130A Datasheet

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WM7130A

Manufacturer Part Number
WM7130A
Description
Bottom Port Analogue Silicon Microphone
Manufacturer
WOLFSON [Wolfson Microelectronics plc]
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
WM7130AIMSE/RV
Manufacturer:
HITTITE
Quantity:
15 192
w
DESCRIPTION
The WM7130A is a low-profile silicon analogue 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 membrane technology, offering high reliability
and high performance in a miniature, low-profile package.
The
temperatures associated with automated flow solder
assembly processes. (Note that conventional microphones
can be damaged by this process.)
The WM7130AE 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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WM7130A is designed to withstand the high
WM7130A
Bottom Port Analogue Silicon Microphone
incorporates
Wolfson’s
at
http://www.wolfsonmicro.com/enews
proprietary
WM7130A, WM7130AE
FEATURES
APPLICATIONS
High SNR; selectable sensitivity tolerance options
-
-
Low supply current 140µA
Low profile packaging
Support for automated flow solder assembly
Analogue output
Bottom Port Package
1.5V to 3.7V supply
3.76mm x 3.00mm x 1.10mm Package
Mobile phone handsets
Portable media players
Digital still cameras
Digital video cameras
Bluetooth headsets
Portable navigation devices
Portable games consoles
WM7130A - SNR 61dB, Sensitivity +/-3dB
WM7130AE - SNR 61dB, Sensitivity +/-1dB
Copyright 2012 Wolfson Microelectronics plc
Pre-Production, April 2012, 3.1

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WM7130A Summary of contents

Page 1

... The WM7130AE 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. ...

Page 2

... WM7130A 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 .............................................................. 4 RECOMMENDED OPERATING CONDITIONS ..................................................... 4 ACOUSTIC AND ELECTRICAL CHARACTERISTICS ......................................... 5 TERMINOLOGY ............................................................................................................... 5  TYPICAL PERFORMANCE ................................................................................... 6 FREQUENCY RESPONSE .............................................................................................. 6  THD RATIO ...................................................................................................................... 6  APPLICATIONS INFORMATION .......................................................................... 7 RECOMMENDED EXTERNAL COMPONENTS .............................................................. 7  ...

Page 3

... Analogue ground Analogue ground Analogue supply Analogue ground Analogue ground MOISTURE TEMPERATURE SENSITIVITY LEVEL RANGE MSL2A o -40 to +100 C MSL2A o -40 to +100 C MSL2A o -40 to +100 C MSL2A o -40 to +100 C WM7130A PEAK SOLDERING TEMPERATURE o +260 C o +260 C o +260 C o +260 C PP, Rev 3.1, April 2012 3 ...

Page 4

... WM7130A 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 at the test conditions specified. ESD Sensitive Device. This device is manufactured on a CMOS process therefore generically susceptible to damage from excessive static voltages ...

Page 5

... Pre-Production ACOUSTIC AND ELECTRICAL CHARACTERISTICS Test Conditions: VDD=2.1V, 1kHz test signal, T PARAMETER SYMBOL Directivity Sensitivity (WM7130A) S Sensitivity (WM7130AE) S Acoustic Overload Signal to Noise Ratio SNR Total Harmonic Distortion THD Dynamic Range DR Frequency Response Acoustic Noise Floor Electrical Noise Floor Power Supply Rejection Ratio ...

Page 6

... WM7130A 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 10.0 100.0 THD RATIO 10.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 90.0 95.0 100.0 w Sensitivity vs frequency (Relative to Sensitivity @KHz) 1000.0 Frequency (Hz) THD vs Input Sound Pressure Level 105.0 110.0 115.0 120.0 Input Sound Pressure Level (dB SPL) Pre-Production 10000.0 100000.0 125.0 130.0 135.0 PP, Rev 3 ...

Page 7

... Pre-Production APPLICATIONS INFORMATION RECOMMENDED EXTERNAL COMPONENTS Figure 1 WM7130A Recommended External Components A DC-blocking output capacitor is required on the OUTPUT pin, as illustrated in Figure 1. A single capacitor is required for a single-ended connection. The capacitor must be correctly selected as it affects the cut-off frequency of the output path. A low cut-off frequency is desirable as it means there is no significant filtering of the audio bandwidth ...

Page 8

... Figure 2 (for single-ended mode) and Figure 3 (for pseudo-differential mode blocking capacitor is required, as described in the previous section. A 1µF decoupling capacitor is also recommended; this should be positioned close to the VDD pin of the WM7130A. Further information on the WM8994 is provided in the product datasheet, which is available from the Wolfson website ...

Page 9

... Pre-Production RECOMMENDED PCB LAND PATTERNS Figure 4 Recommended Customer PCB Land Pattern (Note that all other dimensions can be obtained from the package dimensions) w 1.93mm WM7130A PP, Rev 3.1, April 2012 9 ...

Page 10

... WM7130A PACKAGE DIMENSIONS w Pre-Production PP, Rev 3.1, April 2012 10 ...

Page 11

... Wolfson is not liable for any such representations, warranties or liabilities or for any reliance placed thereon by any person. ADDRESS: Wolfson Microelectronics plc Westfield House 26 Westfield Road Edinburgh EH11 2QB Tel :: +44 (0)131 272 7000 Fax :: +44 (0)131 272 7001 Email :: sales@wolfsonmicro.com w WM7130A Wolfson is PP, Rev 3.1, April 2012 11 ...

Page 12

... Added the WM7130AE Updated the features for WM7130AE Updated the frequency response curve, the THD curves, Updated the +3dB frequency response to 14200Hz. Updated WM7130AE frequency response performance, and sensitivity performance Updated the reel quantity to 4800 Remove the 20k ohms test condition. ...

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