Hello diyers,
I would like to build a DAC based on 4x TDA1387 but I don't know which parts and sections I'll need, since I'm starting to understand how a NOS DAC actually works. There are some good quality ready-made boards available online, but I need to build it very small, minimalist style for a portable application, so I must build it from scratch.
Digital data and MCLK would come via I2S from an ARM MC (Teensy4).
My initial question is which sections this DAC should include. To my understanding an LPF and a voltage to current (VI) converter are needed at the output of the DAC paralleled ICs, the latter can be an opamp or inductor network. Which other sections would I minimally need, provided PSU and MCKL are already there? I think a TTL IC might still be necessary for it work in slave mode, but still don't understand it's function so I'm not sure about it.
I'm trying to get a broad view on what does it mean to embark in this project. I don't need the best quality ever, but that it works decently for monitoring audio to be recorded. If anybody has seen a circuit diagram for this DAC with components, that would be very helpful. There is a 4x board around but it's USB and undocumented. I haven't found any diagram on the 8x chip I2S board neither. Any contribution will be highly appreciated.
Regards and cheerful Christmas (specially for those who celebrate),
Domingo
I would like to build a DAC based on 4x TDA1387 but I don't know which parts and sections I'll need, since I'm starting to understand how a NOS DAC actually works. There are some good quality ready-made boards available online, but I need to build it very small, minimalist style for a portable application, so I must build it from scratch.
Digital data and MCLK would come via I2S from an ARM MC (Teensy4).
My initial question is which sections this DAC should include. To my understanding an LPF and a voltage to current (VI) converter are needed at the output of the DAC paralleled ICs, the latter can be an opamp or inductor network. Which other sections would I minimally need, provided PSU and MCKL are already there? I think a TTL IC might still be necessary for it work in slave mode, but still don't understand it's function so I'm not sure about it.
I'm trying to get a broad view on what does it mean to embark in this project. I don't need the best quality ever, but that it works decently for monitoring audio to be recorded. If anybody has seen a circuit diagram for this DAC with components, that would be very helpful. There is a 4x board around but it's USB and undocumented. I haven't found any diagram on the 8x chip I2S board neither. Any contribution will be highly appreciated.
Regards and cheerful Christmas (specially for those who celebrate),
Domingo