CS7331P-CAZR

CS7331P-CAZR Datasheet

CS7331P

Part	Datasheet
CS7331P-CAZR	CS7331P-CAZR (pdf)

PDF Datasheet Preview
CS7331P Miniature Bottom Port Analog MEMS Microphone • High acoustic overload point AOP, 124-dB SPL • High signal-to-noise ratio 63-dB SNR • Low variation in sensitivity ±1 dB • Low current consumption 55 • Analog output • Bottom-port LGA package • to 3.6-V supply The CS7331P is a low-profile analog MEMS microphone. It offers miniature dimensions and low-current consumption, making it ideal for always-on, always-listening use in space-constrained applications. The CS7331P incorporates Cirrus proprietary CMOS/MEMS membrane technology, offering high reliability and high performance. The CS7331P is designed to withstand the high temperatures associated with automated flow solder assembly processes. The CS7331P is ideally suited to the Cirrus Logic SoundClear suite of audio processing algorithms, including speech recognition, voice trigger, and noise cancelation. The CS7331P is available in a x 0.9-mm, bottom-port LGA package, with a 0.25-mm port diameter. It is ideal for portable applications such as noise-canceling earbuds, smartphones, wearables, and cameras. VDD GND MEMS Transducer CMOS ASIC Biasing High Performance Amp OUTPUT Preliminary Product Information This document contains information for a new product. Cirrus Logic reserves the right to modify this product without notice. Cirrus Logic Confidential Copyright Cirrus Logic, Inc. All Rights Reserved DS1165PP1 FEB '17 CS7331P Table of Contents 1 Pin Descriptions 3 LGA Pinout 3 Pin Descriptions 3 2 Typical Connection Diagram 4 3 Characteristics and Specifications 4 Table Parameter Definitions 4 Table Recommended Operating Conditions 4 Table Absolute Maximum Ratings 5 Table Acoustic and Electrical Characteristics 5 4 Typical Performance 6 Cirrus Logic Confidential DS1165PP1 1 Pin Descriptions LGA Pinout CS7331P 1 Pin Descriptions Figure Top-Down Through-Package View Pin Descriptions A description of each pin on the CS7331P is provided in Table Name VDD OUTPUT GND Pin # 1 2 3 4 Table Pin Descriptions Power supply O Microphone analog output signal Ground Can be left floating recommended , or connected to GND Cirrus Logic Confidential DS1165PP1 2 Typical Connection Diagram CS7331P 2 Typical Connection Diagram CS7331P OUTPUT Audio Codec INPUT Figure Typical Connection Diagram The recommended connection of a CS7331P silicon microphone is shown in Fig. A DC-blocking capacitor is required on the OUTPUT pin. The capacitor must be correctly selected as it affects the cut-off frequency of the output path. A low cut-off frequency is desirable to ensure there is no significant filtering of the audio bandwidth. The 3-dB cut-off frequency of the output path can be calculated using Eq. 2-1, where C is the output capacitance and R is the input resistance of the audio codec. 3-dB filter cut-off frequency = Equation Low-Pass Filter Calculation A typical recommended configuration uses a DC-blocking capacitor and a codec input impedance, which results in a 3-dB cut-off frequency of 10 Hz or less. Tantalum electrolytic capacitors are particularly suitable for the DC-blocking components as they offer high stability in a small package size. It is also recommended to place a decoupling capacitor close to the VDD pin of the CS7331P. 3 Characteristics and Specifications Table Parameter Definitions Parameter Definition Sensitivity A measure of the microphone output response to the acoustic pressure of a 1-kHz, 94 dB SPL 1 Pa RMS sine wave. Total harmonic distortion THD The ratio of the RMS sum of the harmonic distortion products in the specified bandwidth see note relative to the RMS amplitude of the fundamental i.e., test frequency output. Signal-to-noise ratio SNR 7 Ordering Information Table Ordering Information Product CS7331P Miniature Bottom Port Analog MEMS Microphone Package LGA Halogen Free Pb Free Grade Commercial Temperature Range Container Order # to +85°C Tape and Reel 1 CS7331P-CAZR 1.Reel quantity = 6,000 units. 8 References • WAN0273 MEMS Mic Assembly and Handling Guidelines • WAN0284 General Design Considerations for MEMS Microphones FEB ‘17 Changes • PSRR performance plot added Fig. • PCB land pattern and paste stencil drawings added Section Cirrus Logic Confidential DS1165PP1 CS7331P Contacting Cirrus Logic Support For all product questions and inquiries, contact a Cirrus Logic Sales Representative. To find the one nearest you, go to IMPORTANT NOTICE “Preliminary” product information describes products that are in production, but for which full characterization data is not yet available. For the purposes of our terms and conditions of sale, “Preliminary” or “Advanced” data sheets are nonfinal data sheets that include, but are not limited to, data sheets marked as “Target”, “Advance”, “Product Preview”, “Preliminary Technical Data”, and/or “Preproduction”. Products provided with any such data sheet are therefore subject to relevant terms and conditions associated with “Preliminary” or “Advanced” designations. The products and services of Cirrus Logic International UK Limited Cirrus Logic, Inc. and other companies in the Cirrus Logic group collectively either “Cirrus Logic” or “Cirrus” are sold subject to Cirrus Logic’s terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. Software is provided pursuant to applicable license terms. Cirrus Logic 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 Logic to verify that the information is current and complete. Testing and other quality control techniques are utilized to the extent Cirrus Logic 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 Logic is not liable for applications assistance or customer product design. The customer is solely responsible for its selection and use of Cirrus Logic products. Use of Cirrus Logic products may entail a choice between many different modes of operation, some or all of which may require action by the user, and some or all of which may be optional. Nothing in these materials should be interpreted as instructions or suggestions to choose one mode over another. Likewise, description of a single mode should not be interpreted as a suggestion that other modes should not be used or that they would not be suitable for operation. Features and operations described herein are for illustrative purposes only. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE “CRITICAL APPLICATIONS” . CIRRUS LOGIC 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 LOGIC PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK AND CIRRUS LOGIC 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 LOGIC PRODUCT THAT IS USED IN SUCH A MANNER. IF THE CUSTOMER OR CUSTOMER’S CUSTOMER USES OR PERMITS THE USE OF CIRRUS LOGIC PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES, BY SUCH USE, TO FULLY INDEMNIFY CIRRUS LOGIC, 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 Logic and by furnishing this information, Cirrus Logic 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 Logic’s approval, license, warranty or endorsement thereof. Cirrus Logic gives consent for copies to be made of the information contained herein only for use within your organization with respect to Cirrus Logic integrated circuits or other products of Cirrus Logic, 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 Logic 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 Logic. Other brand and product names may be trademarks or service marks of their respective owners. Copyright Cirrus Logic, Inc. All rights reserved. DS1165PP1 Cirrus Logic Confidential

PDF Datasheet Preview

CS7331P

Miniature Bottom Port Analog MEMS Microphone
• High acoustic overload point AOP, 124-dB SPL
• High signal-to-noise ratio 63-dB SNR
• Low variation in sensitivity ±1 dB
• Low current consumption 55
• Analog output
• Bottom-port LGA package
• to 3.6-V supply

The CS7331P is a low-profile analog MEMS microphone. It offers miniature dimensions and low-current consumption, making it ideal for always-on, always-listening use in space-constrained applications.

The CS7331P incorporates Cirrus proprietary CMOS/MEMS membrane technology, offering high reliability and high performance. The CS7331P is designed to withstand the high temperatures associated with automated flow solder assembly processes.

The CS7331P is ideally suited to the Cirrus Logic SoundClear suite of audio processing algorithms, including speech recognition, voice trigger, and noise cancelation.

The CS7331P is available in a x 0.9-mm, bottom-port LGA package, with a 0.25-mm port diameter. It is ideal for portable applications such as noise-canceling earbuds, smartphones, wearables, and cameras.

VDD GND

MEMS Transducer

CMOS ASIC

Biasing

High Performance Amp

OUTPUT

Preliminary Product Information

This document contains information for a new product. Cirrus Logic reserves the right to modify this product without notice.

Cirrus Logic Confidential

Copyright Cirrus Logic, Inc.

All Rights Reserved

DS1165PP1 FEB '17

CS7331P

Table of Contents
1 Pin Descriptions 3 LGA Pinout 3 Pin Descriptions 3
2 Typical Connection Diagram 4 3 Characteristics and Specifications 4

Table Parameter Definitions 4 Table Recommended Operating Conditions 4 Table Absolute Maximum Ratings 5 Table Acoustic and Electrical Characteristics 5 4 Typical Performance 6
Cirrus Logic Confidential

DS1165PP1
1 Pin Descriptions

LGA Pinout

CS7331P
1 Pin Descriptions

Figure Top-Down Through-Package View

Pin Descriptions

A description of each pin on the CS7331P is provided in Table

Name VDD OUTPUT GND

Pin # 1 2 3 4

Table Pin Descriptions

Power supply

O Microphone analog output signal

Ground

Can be left floating recommended , or connected to GND

Cirrus Logic Confidential

DS1165PP1
2 Typical Connection Diagram

CS7331P
2 Typical Connection Diagram

CS7331P

OUTPUT

Audio Codec

INPUT

Figure Typical Connection Diagram

The recommended connection of a CS7331P silicon microphone is shown in Fig.

A DC-blocking capacitor is required on the OUTPUT pin. The capacitor must be correctly selected as it affects the cut-off frequency of the output path. A low cut-off frequency is desirable to ensure there is no significant filtering of the audio bandwidth.

The 3-dB cut-off frequency of the output path can be calculated using Eq. 2-1, where C is the output capacitance and R is the input resistance of the audio codec.
3-dB filter cut-off frequency =

Equation Low-Pass Filter Calculation

A typical recommended configuration uses a DC-blocking capacitor and a codec input impedance, which results in a 3-dB cut-off frequency of 10 Hz or less. Tantalum electrolytic capacitors are particularly suitable for the DC-blocking components as they offer high stability in a small package size.

It is also recommended to place a decoupling capacitor close to the VDD pin of the CS7331P.
3 Characteristics and Specifications

Table Parameter Definitions

Parameter

Definition

Sensitivity

A measure of the microphone output response to the acoustic pressure of a 1-kHz, 94 dB SPL 1 Pa RMS sine wave.

Total harmonic distortion THD The ratio of the RMS sum of the harmonic distortion products in the specified bandwidth see note relative to the RMS amplitude of the fundamental i.e., test frequency output.

Signal-to-noise ratio SNR
7 Ordering Information
Table Ordering Information

Product

CS7331P Miniature Bottom Port Analog MEMS Microphone

Package LGA

Halogen Free

Pb Free

Grade Commercial

Temperature Range

Container

Order #
to +85°C Tape and Reel 1 CS7331P-CAZR
1.Reel quantity = 6,000 units.
8 References
• WAN0273 MEMS Mic Assembly and Handling Guidelines
• WAN0284 General Design Considerations for MEMS Microphones

FEB ‘17

Changes
• PSRR performance plot added Fig.
• PCB land pattern and paste stencil drawings added Section

Cirrus Logic Confidential

DS1165PP1

CS7331P

Contacting Cirrus Logic Support

For all product questions and inquiries, contact a Cirrus Logic Sales Representative.

To find the one nearest you, go to

IMPORTANT NOTICE
“Preliminary” product information describes products that are in production, but for which full characterization data is not yet available. For the purposes of our terms and conditions of sale, “Preliminary” or “Advanced” data sheets are nonfinal data sheets that include, but are not limited to, data sheets marked as “Target”, “Advance”, “Product Preview”, “Preliminary Technical Data”, and/or “Preproduction”. Products provided with any such data sheet are therefore subject to relevant terms and conditions associated with “Preliminary” or “Advanced” designations. The products and services of Cirrus Logic International UK Limited Cirrus Logic, Inc. and other companies in the Cirrus Logic group collectively either “Cirrus Logic” or “Cirrus” are sold subject to Cirrus Logic’s terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. Software is provided pursuant to applicable license terms. Cirrus Logic 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 Logic to verify that the information is current and complete. Testing and other quality control techniques are utilized to the extent Cirrus Logic 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 Logic is not liable for applications assistance or customer product design. The customer is solely responsible for its selection and use of Cirrus Logic products. Use of Cirrus Logic products may entail a choice between many different modes of operation, some or all of which may require action by the user, and some or all of which may be optional. Nothing in these materials should be interpreted as instructions or suggestions to choose one mode over another. Likewise, description of a single mode should not be interpreted as a suggestion that other modes should not be used or that they would not be suitable for operation. Features and operations described herein are for illustrative purposes only.

CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE “CRITICAL APPLICATIONS” . CIRRUS LOGIC 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 LOGIC PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK AND CIRRUS LOGIC 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 LOGIC PRODUCT THAT IS USED IN SUCH A MANNER. IF THE CUSTOMER OR CUSTOMER’S CUSTOMER USES OR PERMITS THE USE OF CIRRUS LOGIC PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES, BY SUCH USE, TO FULLY INDEMNIFY CIRRUS LOGIC, 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 Logic and by furnishing this information, Cirrus Logic 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 Logic’s approval, license, warranty or endorsement thereof. Cirrus Logic gives consent for copies to be made of the information contained herein only for use within your organization with respect to Cirrus Logic integrated circuits or other products of Cirrus Logic, 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 Logic 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 Logic. Other brand and product names may be trademarks or service marks of their respective owners.

Copyright Cirrus Logic, Inc. All rights reserved.

DS1165PP1

Cirrus Logic Confidential

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived CS7331P-CAZR Datasheet file may be downloaded here without warranties.

Datasheet ID: CS7331P-CAZR 523213