WM7211IMSE/RV

WM7211IMSE/RV Datasheet

WM7211, WM7211E

Part	Datasheet
WM7211IMSE/RV	WM7211IMSE/RV (pdf)

PDF Datasheet Preview
WM7211, WM7211E Top Port Digital Silicon Microphone The WM7211 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 WM7211 incorporates Wolfson’s proprietary CMOS/MEMS membrane technology, offering high reliability and high performance in a miniature, low-profile package. The WM7211 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 WM7211 incorporates a high performance ADC, which outputs a single-bit Pulse Density Modulated PDM audio data stream. The WM7211 supports selectable left/right channel assignment for a two-channel digital microphone interface, enabling efficient connection of multiple microphones in stereo/array configurations. The WM7211E 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 High SNR selectable sensitivity tolerance options - WM7211 SNR 61dB, Sensitivity +/-3dB - WM7211E SNR 61dB, Sensitivity +/-1dB • Low power - Sleep mode - 2uA - Normal operation - 735uA • Low profile packaging • Support for automated flow solder assembly • PDM digital audio output • Stereo/array operation • Proprietary ADC technology - Reduced clock jitter sensitivity - Low noise floor modulation - Stable in overload condition • Top port package • 1.64V to 3.7V supply • x 1.00mm thin package design • Mobile telephone handsets • Portable computers • Portable media players • Digital still cameras • Digital video cameras • Bluetooth headsets • Portable navigation devices WOLFSON MICROELECTRONICS plc WM7211 TABLE OF CONTENTS Pre-Production 1 FEATURES 1 BLOCK DIAGRAM 1 TABLE OF 2 PIN CONFIGURATION 3 PIN 3 ORDERING 3 ABSOLUTE MAXIMUM RATINGS 4 IMPORTANT ASSEMBLY GUIDELINES 4 RECOMMENDED OPERATING 4 ACOUSTIC AND ELECTRICAL CHARACTERISTICS 5 TERMINOLOGY 5 AUDIO INTERFACE TIMING 7 TYPICAL PERFORMANCE 8 FREQUENCY RESPONSE 8 THD RATIO 8 APPLICATIONS INFORMATION 9 RECOMMENDED EXTERNAL COMPONENTS 9 OPTIMISED SYSTEM RF DESIGN 9 CONNECTION TO A WOLFSON AUDIO CODEC 9 RECOMMENDED PCB LAND PATTERNS 10 Pre-Production PIN CONFIGURATION WM7211 PIN DESCRIPTION NAME LRSEL TYPE Supply Digital Input Digital Input Digital Output Supply Supply Channel Select 0 = Data output following falling CLK edge 1 = Data output following rising CLK edge Clock input PDM Data Output Ground ORDERING INFORMATION DEVICE WM7211IMS/RV Standard tape and reel WM7211IMSE/RV Standard Enhanced tape and reel Note: Reel Quantity = 4800 All devices are Pb-free and Halogen free. TEMPERATURE RANGE -40 to +100oC -40 to +100oC MOISTURE SENSITIVITY LEVEL MSL2A PEAK SOLDERING TEMPERATURE +260oC +260oC WM7211 Pre-Production 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. It is therefore generically susceptible to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage of this device. Wolfson tests its package types according to IPC/JEDEC J-STD-020 for Moisture Sensitivity to determine acceptable storage conditions prior to surface mount assembly. These levels are: MSL1 = unlimited floor life at <30C / 85% Relative Humidity. Not normally stored in moisture barrier bag. MSL2 = out of bag storage for 1 year at <30C / 60% Relative Humidity. Supplied in moisture barrier bag. MSL2A = out of bag storage for 4 weeks at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag. MSL3 = out of bag storage for 168 hours at <30C / 60% Relative Humidity. Supplied in moisture barrier bag. The Moisture Sensitivity Level for each package type is specified in Ordering Information. CONDITION Supply Voltage VDD Voltage range digital inputs LRSEL and CLK Operating temperature range, TA Storage temperature prior to soldering Storage temperature after soldering -0.3V +4.2V GND-0.3V VDD+0.3V -40ºC +100ºC 30C max / 60% RH max -40ºC +100ºC IMPORTANT ASSEMBLY GUIDELINES Do not put a vacuum over the port hole of the microphone. Placing a vacuum over the port hole can damage the device. For information on recommended pick and place vacuum point, refer to the package dimension drawing. Do not board wash the microphone after a re-flow process. Board washing and the associated cleaning agents can damage the device. Do not expose to ultrasonic cleaning methods. Do not use vapour phase re-flow process. The vapour can damage the device. Please refer to application note WAN0273 MEMS MIC Assembly and Handling Guidelines for further assembly and handling guidelines. RECOMMENDED OPERATING CONDITIONS PARAMETER Analogue Supply Range Ground Clock Frequency VDD GND FCLK UNIT V MHz Pre-Production WM7211 ACOUSTIC AND ELECTRICAL CHARACTERISTICS Test Conditions VDD=1.8V, 1kHz test signal, CLK=2.4MHz, TA = 25°C PARAMETER TEST CONDITIONS Directivity Polarity see note Positive sound pressure Sensitivity WM7211 94 dB SPL Sensitivity WM7211E 94 dB SPL Acoustic Overload THD < 10% Signal to Noise Ratio A-Weighted Total Harmonic Distortion Introduced E variant with sensitivity +/-1dB Added E variant ordering info Added voltage range digital input Updated the CODEC to WM8994 Added Reference to WAN_0273 Package Diagram updated to DM096C formatting updates. Package Diagram updated to DM096D Package Diagram updated to DM096E Product Status updated to Pre Production Updated CODEC reference to WM8280. Acoustic and Electrical Characteristics updated Polarity and Note added.

PDF Datasheet Preview

WM7211, WM7211E

Top Port Digital Silicon Microphone

The WM7211 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 WM7211 incorporates Wolfson’s proprietary CMOS/MEMS membrane technology, offering high reliability and high performance in a miniature, low-profile package. The WM7211 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 WM7211 incorporates a high performance ADC, which outputs a single-bit Pulse Density Modulated PDM audio data stream. The WM7211 supports selectable left/right channel assignment for a two-channel digital microphone interface, enabling efficient connection of multiple microphones in stereo/array configurations. The WM7211E 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

High SNR selectable sensitivity tolerance options - WM7211 SNR 61dB, Sensitivity +/-3dB - WM7211E SNR 61dB, Sensitivity +/-1dB
• Low power - Sleep mode - 2uA - Normal operation - 735uA
• Low profile packaging
• Support for automated flow solder assembly
• PDM digital audio output
• Stereo/array operation
• Proprietary ADC technology - Reduced clock jitter sensitivity - Low noise floor modulation - Stable in overload condition
• Top port package
• 1.64V to 3.7V supply
• x 1.00mm thin package design
• Mobile telephone handsets
• Portable computers
• Portable media players
• Digital still cameras
• Digital video cameras
• Bluetooth headsets
• Portable navigation devices

WOLFSON MICROELECTRONICS plc

WM7211

TABLE OF CONTENTS

Pre-Production
1 FEATURES 1 BLOCK DIAGRAM 1 TABLE OF 2 PIN CONFIGURATION 3 PIN 3 ORDERING 3 ABSOLUTE MAXIMUM RATINGS 4 IMPORTANT ASSEMBLY GUIDELINES 4 RECOMMENDED OPERATING 4 ACOUSTIC AND ELECTRICAL CHARACTERISTICS 5

TERMINOLOGY 5 AUDIO INTERFACE TIMING 7

TYPICAL PERFORMANCE 8

FREQUENCY RESPONSE 8 THD RATIO 8

APPLICATIONS INFORMATION 9

RECOMMENDED EXTERNAL COMPONENTS 9 OPTIMISED SYSTEM RF DESIGN 9 CONNECTION TO A WOLFSON AUDIO CODEC 9 RECOMMENDED PCB LAND PATTERNS 10

Pre-Production

PIN CONFIGURATION

WM7211

PIN DESCRIPTION

NAME

LRSEL

TYPE

Supply Digital Input

Digital Input Digital Output

Supply

Supply Channel Select 0 = Data output following falling CLK edge 1 = Data output following rising CLK edge Clock input PDM Data Output Ground
ORDERING INFORMATION

DEVICE

WM7211IMS/RV

Standard tape and reel

WM7211IMSE/RV

Standard Enhanced tape and reel

Note:

Reel Quantity = 4800

All devices are Pb-free and Halogen free.

TEMPERATURE RANGE
-40 to +100oC -40 to +100oC

MOISTURE SENSITIVITY LEVEL

MSL2A

PEAK SOLDERING TEMPERATURE
+260oC +260oC

WM7211

Pre-Production

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. It is therefore generically susceptible to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage of this device.

Wolfson tests its package types according to IPC/JEDEC J-STD-020 for Moisture Sensitivity to determine acceptable storage conditions prior to surface mount assembly. These levels are:
MSL1 = unlimited floor life at <30C / 85% Relative Humidity. Not normally stored in moisture barrier bag. MSL2 = out of bag storage for 1 year at <30C / 60% Relative Humidity. Supplied in moisture barrier bag. MSL2A = out of bag storage for 4 weeks at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag. MSL3 = out of bag storage for 168 hours at <30C / 60% Relative Humidity. Supplied in moisture barrier bag. The Moisture Sensitivity Level for each package type is specified in Ordering Information.

CONDITION

Supply Voltage VDD Voltage range digital inputs LRSEL and CLK Operating temperature range, TA Storage temperature prior to soldering Storage temperature after soldering
-0.3V
+4.2V

GND-0.3V

VDD+0.3V
-40ºC
+100ºC
30C max / 60% RH max
-40ºC
+100ºC

IMPORTANT ASSEMBLY GUIDELINES

Do not put a vacuum over the port hole of the microphone. Placing a vacuum over the port hole can damage the device. For information on recommended pick and place vacuum point, refer to the package dimension drawing.

Do not board wash the microphone after a re-flow process. Board washing and the associated cleaning agents can damage the device. Do not expose to ultrasonic cleaning methods.

Do not use vapour phase re-flow process. The vapour can damage the device.

Please refer to application note WAN0273 MEMS MIC Assembly and Handling Guidelines for further assembly and handling guidelines.

RECOMMENDED OPERATING CONDITIONS

PARAMETER

Analogue Supply Range Ground Clock Frequency

VDD GND FCLK

UNIT

V MHz

Pre-Production

WM7211

ACOUSTIC AND ELECTRICAL CHARACTERISTICS

Test Conditions VDD=1.8V, 1kHz test signal, CLK=2.4MHz, TA = 25°C

PARAMETER

TEST CONDITIONS

Directivity

Polarity see note

Positive sound pressure

Sensitivity WM7211
94 dB SPL

Sensitivity WM7211E
94 dB SPL

Acoustic Overload

THD < 10%

Signal to Noise Ratio

A-Weighted

Total Harmonic Distortion
Introduced E variant with sensitivity +/-1dB Added E variant ordering info Added voltage range digital input Updated the CODEC to WM8994

Added Reference to WAN_0273 Package Diagram updated to DM096C formatting updates.

Package Diagram updated to DM096D

Package Diagram updated to DM096E

Product Status updated to Pre Production Updated CODEC reference to WM8280.

Acoustic and Electrical Characteristics updated Polarity and Note added.

More datasheets: DC-ANT-DBMP | AD7893BR-10REEL7 | 90NI-M | 100NI-L | 100NI-XL | 100NI-M | 100NI-S | 90NI-L | 90NI-S | 90NI-XL

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Datasheet ID: WM7211IMSE/RV 523263