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WM7120A Datasheet(PDF) 8 Page - Wolfson Microelectronics plc

Part # WM7120A
Description  Top Port Analogue 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

WM7120A Datasheet(HTML) 8 Page - Wolfson Microelectronics plc

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WM7120A
Pre-Production
w
PP, Rev 3.1, April 2012
8
CONNECTION TO A WOLFSON AUDIO CODEC
Wolfson provides a range of audio CODECs incorporating an analogue microphone input interface;
these support connection to silicon microphones such as the WM7120A.
The recommended connection of a WM7120A silicon microphone to the WM8994 is illustrated in
Figure 2 (for single-ended mode) and Figure 3 (for pseudo-differential mode).
A DC-blocking capacitor is required, as described in the previous section. A 1µF decoupling capacitor
is also recommended; this should be positioned close to the VDD pin of the WM7120A.
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 in a similar
manner.
Figure 2 WM7120A Silicon Microphone Single-ended Connection to WM8994
Figure 3 WM7120A Silicon Microphone Pseudo-differential Connection to WM8994


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