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WM7230IMSE/V Datasheet(PDF) 8 Page - Wolfson Microelectronics plc

Part No. WM7230IMSE/V
Description  Bottom Port Digital Silicon Microphone
Download  12 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM7230IMSE/V Datasheet(HTML) 8 Page - Wolfson Microelectronics plc

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WM7230
Preliminary Technical Data
w
PTD, Rev 2.4, October 2012
8
APPLICATIONS INFORMATION
RECOMMENDED EXTERNAL COMPONENTS
It is recommended to connect a 0.1µF decoupling capacitor between the VDD and GND pins of the
WM7230. A ceramic 0.1µF capacitor with X7R dielectric or better is suitable. The capacitor should be
placed as close to the WM7230 as possible.
OPTIMISED SYSTEM RF DESIGN
For optimised RF design please refer to document WAN0278 (Recommended PCB Layout for
Microphone RF Immunity in Mobile Cell Phone Applications) for further information.
CONNECTION TO A WOLFSON AUDIO CODEC
Wolfson provides a range of audio CODECs incorporating a digital microphone input interface; these
support direction connection to digital microphones such as the WM7230.
Stereo connection of two WM7230 digital microphones to the WM8994 CODEC is illustrated in Figure
2.
A 0.1µF decoupling capacitor is recommended; this should be positioned close to the VDD pin of the
WM7230. A ceramic 0.1µF capacitor with X7R dielectric or better is suitable.
Further information on the WM8994 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 WM7230 Digital Microphone Connection to WM8994


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