WM7220IMS/RV Wolfson Microelectronics, WM7220IMS/RV Datasheet - Page 8

• Manufacturer Part Number: WM7220IMS/RV
• Description: MICROPHONE, MEMS, DIGITAL, STD
• Manufacturer: Wolfson Microelectronics

Specifications of WM7220IMS/RV

• Brief Features: High SNR Of 58dB, Support Stereo / Array Operation And Automated Flow Solder Assembly
• Operating Temperature Range: -40°C To +100°C
• No. Of Pins: 6
• Rohs Compliant: Yes
• Ic Function: Digital Silicon Microphone
• Supply Voltage Range: 1.64V To 3.7V

WM7220
APPLICATIONS INFORMATION
RECOMMENDED EXTERNAL COMPONENTS
CONNECTION TO A WOLFSON AUDIO CODEC
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It is recommended to connect a 0.1μF decoupling capacitor between the VDD and GND pins of the
WM7220. A ceramic 0.1μF capacitor with X7R dielectric or better is suitable. The capacitor should be
placed as close to the WM7220 as possible.
Wolfson provides a range of audio CODECs incorporating a digital microphone input interface; these
support direct connection to digital microphones such as the WM7220.
Stereo connection of two WM7220 digital microphones to the WM8903 CODEC is illustrated in
Figure 2. Further information on the WM8903 is provided in the product datasheet, which is available
from the Wolfson website. The equivalent connections can be made to other Wolfson devices
supporting a digital microphone interface.
Figure 2 Stereo WM7220 Digital Microphone connection to WM8903
PTD, Rev 2.0, October 2010
Preliminary Technical Data
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