Testing the Tiny Tapeout 6 Successive Approximation Analog-to-Digital Converter (ADC)
0:00:16 Overview: The presenter discusses testing their successive approximation ADC from the Tiny Tapeout 6 project.
0:00:49 Testing the ADC: The presenter explains the need for an input signal to test the ADC, which is connected to the board via soldered wires.
0:01:51 Tiny Tapeout Board: The board features a USB connector for power and communication with a computer and requires an external input for the ADC.
0:03:36 Ease of Use: The presenter praises the Tiny Tapeout board's interface, highlighting its ease of use for selecting and enabling the ADC.
0:03:48 Digital Output Capture: The Saleae logic analyzer captures the digital output, with a specific signal (da) indicating the stability of the output bits.
0:05:19 Input Network: The input network uses the audio output from a docking station, sent through bypass capacitors and resistors to create a pseudo-differential signal around 0.9V.
0:06:57 Signal Generation: A Jupiter Notebook generates audio signals at 44 kHz, which are then played through the docking station's audio output.
0:08:11 Data Capture and Analysis: The Saleae logic analyzer captures the ADC output, and the data is post-processed using an FFT to analyze signal quality and identify spurs.
0:10:31 Spur Investigation: The presenter suspects the presence of spurs in the output signal, possibly due to the input network, and plans to investigate further using INL and DNL measurements.
0:11:48 Performance Evaluation: The current effective number of bits is around 6, which is lower than expected, potentially due to testing issues rather than the ADC design itself.
0:12:08 Tiny Tapeout Appreciation: The presenter expresses enthusiasm for the Tiny Tapeout project and its accessibility for testing and developing integrated circuits.