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PDF WM7132PE Data sheet ( Hoja de datos )
| Número de pieza | WM7132PE | |
| Descripción | Bottom Port Analog Silicon Microphone | |
| Fabricantes | Cirrus Logic | |
| Logotipo |  |
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WM7132PE
Bottom Port Analog Silicon Microphone
DESCRIPTION
The WM7132P is a low-profile silicon analog microphone. It
offers high Signal to Noise Ratio (SNR) and low power
consumption and is suited to a wide variety of consumer
applications.
The WM7132P incorporates Cirrus proprietary
CMOS/MEMS membrane technology, offering high reliability
and high performance in a miniature, low-profile package.
The WM7132P 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 WM7132P Bottom Port microphone offers matched
performance to the WM7121P Top Port microphone. The
matched characteristics enable highly accurate sound pick-
up in opposite directions, suitable for noise cancellation and
other DSP algorithms.
The WM7132P offers a tight 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.
FEATURES
High SNR (65dB)
Low variation in sensitivity (±1dB tolerance)
Matched pair with Top Port microphone WM7121P
- Matched sensitivity, roll-off, and phase response
Low current consumption (190µA)
Analog output
Bottom Port LGA Package
1.5V to 3.7V supply
APPLICATIONS
Mobile phone handsets
Portable media players
Digital still cameras
Digital video cameras
Bluetooth headsets
Portable navigation devices
Portable games consoles
BLOCK DIAGRAM
WM7132P
VDD
CHARGE
PUMP
3D VIEW
CMOS MEMS
Transducer
AMP
GND
OUTPUT
3.76mm x 3.00mm x 1.10mm LGA package
http://www.cirrus.com
Copyright Cirrus Logic, Inc., 2014–2015
(All Rights Reserved)
Rev 4.0
MAR ‘15
1 page  
WM7132PE
ACOUSTIC AND ELECTRICAL CHARACTERISTICS
Test Conditions: VDD=2.1V, 1kHz test signal, TA = 25°C, unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
Directivity
Polarity
Positive sound pressure
Sensitivity
S 94dB SPL
Acoustic Overload
No Load, THD < 10%
Total Harmonic Distortion
THD
100dB SPL
114dB SPL
122 dB SPL
Signal to Noise Ratio
SNR
A-weighted
Dynamic Range
DR A-weighted
Frequency Response
-3dB low frequency
+3dB high frequency
Frequency Response Flatness
200Hz to 6kHz
Acoustic Noise Floor
A-weighted
Electrical Noise Floor
A-weighted
Power Supply Rejection Ratio
PSRR
217Hz sine wave,
100mV (peak-peak)
Power Supply Rejection
PSR
217Hz square wave,
100mV (peak-peak)
Current Consumption
Output DC Impedance
IVDD
ZOUT
MIN TYP MAX
Omni-directional
Positive output voltage
-39 -38 -37
126
0.1 1
0.2
1
65
93
62
12500
-1 +1
29
-103
53
-79
190 240
55 150
UNIT
dBV
dB SPL
%
dB
dB
Hz
dB
dB SPL
dBV
dB
dBV
µA
Ω
TERMINOLOGY
1. Sensitivity (dBV) - Sensitivity is a measure of the microphone output response to the acoustic pressure of a 1kHz 94dB SPL
(1Pa RMS) sine wave.
2. Total Harmonic Distortion (%) – THD is the ratio of the RMS sum of the harmonic distortion products in the specified bandwidth
(see note below) relative to the amplitude of the fundamental (ie. test frequency) output.
3. Signal-to-Noise Ratio (dB) – SNR is a measure of the difference in level between the output response of a 1kHz 94dB SPL
sine wave and the idle noise output.
4. Dynamic Range (dB) – DR is the ratio of the 1% THD microphone output level (in response to a sine wave input) and the idle
noise output level.
5. All performance measurements are carried out within a 20Hz to 20kHz bandwidth and, where noted, an A-weighted filter.
Failure to use these filters will result in higher THD and lower SNR values than are found in the Acoustic and Electrical
Characteristics. The low pass filter removes out of band noise.
Rev 4.0
5
5 Page 
IMPORTANT NOTICE
WM7132PE
Contacting Cirrus Logic Support
For all product questions and inquiries, contact a Cirrus Logic Sales Representative.
To find one nearest you, go to www.cirrus.com.
The products and services of Cirrus Logic International (UK) Limited; Cirrus Logic, Inc.; and other companies in the Cirrus Logic
group (collectively either “Cirrus” or “Cirrus Logic”) are sold subject to Cirrus’s terms and conditions of sale supplied at the time of
order acknowledgement, including those pertaining to warranty, indemnification, and limitation of liability. Software is provided
pursuant to applicable license terms. Cirrus reserves the right to make changes to its products and specifications or to discontinue
any product or service without notice. Customers should therefore obtain the latest version of relevant information from Cirrus to
verify that the information is current and complete. Testing and other quality control techniques are utilized to the extent Cirrus
deems necessary. Specific testing of all parameters of each device is not necessarily performed. In order to minimize risks
associated with customer applications, the customer must use adequate design and operating safeguards to minimize inherent or
procedural hazards. Cirrus is not liable for applications assistance or customer product design. The customer is solely responsible
for its selection and use of Cirrus products.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL
INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE
NOT DESIGNED, AUTHORIZED OR WARRANTED FOR USE IN PRODUCTS SURGICALLY IMPLANTED INTO THE BODY,
AUTOMOTIVE SAFETY OR SECURITY DEVICES, NUCLEAR SYSTEMS, LIFE SUPPORT PRODUCTS OR OTHER CRITICAL
APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE
CUSTOMER’S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED,
INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH
REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE CUSTOMER OR CUSTOMER’S
CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES, BY
SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER
AGENTS FROM ANY AND ALL LIABILITY, INCLUDING ATTORNEYS’ FEES AND COSTS, THAT MAY RESULT FROM OR
ARISE IN CONNECTION WITH THESE USES.
This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied, under any
patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual property rights. Any provision or publication of
any third party’s products or services does not constitute Cirrus’s approval, license, warranty or endorsement thereof. Cirrus gives
consent for copies to be made of the information contained herein only for use within your organization with respect to Cirrus
integrated circuits or other products of Cirrus, and only if the reproduction is without alteration and is accompanied by all associated
copyright, proprietary and other notices and conditions (including this notice). This consent does not extend to other copying such as
copying for general distribution, advertising or promotional purposes, or for creating any work for resale. This document and its
information is provided “AS IS” without warranty of any kind (express or implied). All statutory warranties and conditions are
excluded to the fullest extent possible. No responsibility is assumed by Cirrus for the use of information herein, including use of this
information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties. Cirrus
Logic, Cirrus, the Cirrus Logic logo design and SoundClear are among the trademarks of Cirrus. Other brand and product names
may be trademarks or service marks of their respective owners.
Copyright © 2014–2015 Cirrus Logic, Inc. All rights reserved.
Rev 4.0
11
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| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet WM7132PE.PDF ] | |
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