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STD AD4000sch
Mode: Editors' pick
This actually uses the AD7276. It was originally designed for the AD4000, and I suggest you use that ADC if you are able to solder a 0.5 mm pin pitch IC. There are two analog input signal paths, one for a microphone from adafruit and another designed for a generic wideband signal. The low pass filter on the microphone is a 4th order Butterworth filter with a -0.1 dB corner at 30 kHz. The wideband filter is a 2nd order Butterworth filter with a -0.1 dB corner at 1 MHz. The attached filter wizard files can be loaded at https://tools.analog.com/en/filterwizard/ . The software to run this project is located at https://github.com/tulanthoar/workspace_1.8.0 (although it is not ready yet at this time). Note that you will need to connect the analog and digital grounds at TP10 by manually adding a trace between the two sides. It is recommended that you add ground pours of the digital and analog grounds on their respective sides.
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