WM7210 Wolfson Microelectronics plc, WM7210 Datasheet
WM7210
Related parts for WM7210
WM7210 Summary of contents
Page 1
... 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 Wolfson’s CMOS/MEMS membrane technology, reliability and high performance in a miniature, low-profile package ...
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 ............................................................... 4 RECOMMENDED OPERATING CONDITIONS ..................................................... 4 ACOUSTIC AND ELECTRICAL CHARACTERISTICS .......................................... 5 TERMINOLOGY ............................................................................................................. 5 AUDIO INTERFACE TIMING ......................................................................................... 6 FREQUENCY RESPONSE CURVE ....................................................................... 7 APPLICATIONS INFORMATION ........................................................................... 8 RECOMMENDED EXTERNAL COMPONENTS ............................................................. 8 CONNECTION TO A WOLFSON AUDIO CODEC ......................................................... 8 RECOMMENDED PCB LAND PATTERNS ...
Page 3
... Data output following falling CLK edge Digital Input Clock input Digital Output PDM Data Output Supply Ground TEMPERATURE SENSITIVITY LEVEL RANGE o -40 to +100 C o -40 to +100 C WM7210 DESCRIPTION MOISTURE PEAK SOLDERING TEMPERATURE o MSL2A +260 C o MSL2A +260 C PTD, Rev 2.0, October 2010 3 ...
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 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
... +1mA -1mA LOAD I DAT connected to GND SC I Active Mode VDD SLEEP Mode From OFF From SLEEP WM7210 MIN TYP MAX UNIT Omni-directional -29 -26 -23 dBFS 120 dB SPL 58 0 8600 36 dB SPL -86 dBFS 70 dBFS 0.65 x VDD 0.35 x VDD ...
Page 6
... WM7210 AUDIO INTERFACE TIMING Figure 1 Digital Microphone Interface Timing Test Conditions The following timing information is valid across the full range of recommended operating conditions. PARAMETER Digital Microphone Interface Timing CLK cycle time CLK duty cycle DAT enable from rising CLK edge (LRSEL = 0) ...
Page 7
... Preliminary Technical Data FREQUENCY RESPONSE CURVE Typical Frequency Response Curve relative to Sensitivity at 1kHz 100 -1 w 1000 Freq uency (Hz) WM7210 10000 PTD, Rev 2.0, October 2010 7 ...
Page 8
... 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 as close to the WM7210 as possible. CONNECTION TO A WOLFSON AUDIO CODEC Wolfson provides a range of audio CODECs incorporating a digital microphone input interface; these support direct connection to digital microphones such as the WM7210 ...
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 2.0, October 2010 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 A 0.96 1.03 D 3.90 4.00 E 2.90 3.00 F 0.05 0.10 G 0.25 0.30 H 1.50 I 0.30 0.35 J 0.35 0.40 K 0.90 0.95 L 1.50 M 1.10 N 1.95 O 2.95 P 0.35 0.40 Q 0.30 0.35 R 0.35 0.40 S 0.40 0.45 T 0.35 0.40 U 0.76 0.79 V 0.64 ø1 0.65 0.70 ø2 1.31 NOTES: 1. THE SEATING PLANE IS REPRESENTED BY PRIMARY DATUM -C- 2. THE DEVIATION FROM THE SEATING PLANE DUE TO WARPAGE OR TWIST IS SPECIFIED AS MAX 50μm (FLATNESS). ...
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 WM7210 PTD, Rev 2.0, October 2010 11 ...