WM7210 Wolfson Microelectronics plc, WM7210 Datasheet - Page 8

• Manufacturer Part Number: WM7210
• Description: Digital Silicon Microphone
• Manufacturer: Wolfson Microelectronics plc

WM7210
APPLICATIONS INFORMATION
RECOMMENDED EXTERNAL COMPONENTS
CONNECTION TO A WOLFSON AUDIO CODEC
w
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.
Wolfson provides a range of audio CODECs incorporating a digital microphone input interface; these
support direct connection to digital microphones such as the WM7210.
Stereo connection of two WM7210 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 WM7210 Digital Microphone connection to WM8903
0.1 F
0.1 F
WM7210
WM7210
VDD
VDD
VDD
VDD
GND
GND
CLK
DAT
LRSEL
CLK
DAT
LRSEL
PTD, Rev 2.0, October 2010
Preliminary Technical Data
DMIC_LR
DMIC_DAT
WM8903
8