Hi,
I used other DSP product before, so I'm new to AD. I bought the ADZS-BF706-EZMINI from Mouser on November 2018, and I got some problem. I use CCES 2.81, Sigma Studio 4.2, and Talkthrough example from Analog Devices running on Windows 7 64-bit OS.
Everything's fine when I used only the ADAU1761 on the board via Sigma Studio 4.2, however, the problem occured when I used the whole board including the ADSP-BF706. A “1 kHz” sine wave is generated 100 mV by Audio Precision and the output is shown in Figure 1.jpg. The output is correct (“1 kHz” sine wave) but is amplified to 500 – 600 mV, furthermore, the output seems to not pass the DAC (or maybe ADC in the input part)? Or is it an aliasing problem?
Another problem occurred. I tried to smooth the input and output, so I added an anti-aliasing filter and a reconstruction filter (both using MAX292), an external power supply (3.3 V, with 200 mA limit) and a MAX660 to generate -3.3 V. However, the output is quite weird shown in Figure 2.jpg.
Sorry for the inconvenience, thank you.
Figure 1 and 2 : https://imgur.com/a/S1eY7ux