Wolfson Microelectronics WM7110

awinning over 3 years ago

The WM7110 Evaluation Board was developed by Wolfson to allow the easy evaluation of the company’s compact, high Signal-to- Noise ratio (SNR) WM7110 analog microphone.

WM7110 Microphone

The WM7110 is for use in consumer applications requiring low power consumption and excellent signal quality. Using proprietary CMOS/ MEMS membrane technology, the new device delivers high reliability and performance in a miniature low profi le package. Wolfson also offers an enhanced WM7110E version of the device, which delivers a sensitivity tolerance of +/-1dB.

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icserny over 13 years ago

I received mine today. It's a big surprise that the package contains two boards. Wow, we can test it in stereo as well!
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icserny over 13 years ago in reply to awneil

Where can I get documentation for the Eval board?
Check this one: http://www.wolfsonmicro.com/documents/uploads/misc/en/WM7110_1701_MS4_M_REV1_Schematic_Layout.pdf
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awneil over 13 years ago

I've just received one, too! (actually, a box of 2)

It's so long since this Road Test was anounced (22 Mar 2011) that I'd forgotten all about it!

Unfortunately, it was shipped from the USA - so I've had to pay £15 to the UPS man for import!
Hardly "free" - but still cheaper than buying one, I suppose:
http://uk.farnell.com/wolfson-microelectronics/wm7110-1701-ms4-m/board-eval-mic-wm7110/dp/1872597

Ironic, really - as Wolfson is located in Britain!

The datasheet linked from that Farnell page is just the microphone itself - not the eval board:
http://www.wolfsonmicro.com/documents/uploads/data_sheets/en/WM7110.pdf

Where can I get documentation for the Eval board?

A.
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DAB over 13 years ago

Since the system will not let me write a review, I will post an update here.
My initial attempt to test the microphone with my UNO32 did not work. Trying to test two new devices at once is not the path to success.

So I have regrouped and am in the process of building identical amplifiers for both an Electret and the Wolfson mics. This will take me some time. It has been a while since I have worked at this level and I discovered that my eyesight is no longer good enough to read resistor codes. Big Bummer!

Have no fear, I will get this thing together and provide a proper review. I plan to compare the two mics side by side in a sensitivity test, a frequency range test and an angle of incidence test. When I am done, I will be able to provide a good comparison between the two. It is just going to take longer than I anticipated.

Meanwhile, it's back to work to see if I can knock some rust off my skills and do this test properly.

Thanks,
DAB

Hi Ali,

I just recieved one today, so I guess I was selected. I will start working up a test plan and start testing this device. They are definitly tiny.
Thanks,
DAB
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Wolfson Microelectronics WM7110

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