Hi, I'm building a dac with AD1865 (a clone of the note audio), with the cs8414 receiver, both chips have both analog and digital power, and I was wondering: how useful would it be to separate the power supplies of the two chips? Making an analog and digital power supply for the dac, and one also for the receiver, so as to have a total of 4 power supplies, 2 each chip. All power supplies are further filtered with the tl431. Like this scheme.
Tiziano
Tiziano
Attachments
Hi,
just few things I experienced with such dac.
As it s diy you may try to find the Audial stage made with the same CS chip for a good shematic.
the 0.1 uF around the tl431 must be of a good quality.
This is fine if the CS chip has its own diode bridge smoothing stage, it can share a same secondary if you need 5V for the digital dac chip section - with a separate diodes smoothing bridge- . Just take a second econdary for the analog part of the dac chip.
Could be fine the tl431 makes a reference for darlington reg instead.
Sometimes and often the input trafo is a transparency limitation, while more dangerous to have not. the 0.1 uF in serie should be KP caps like the Wima KP02 for instance.
just few things I experienced with such dac.
As it s diy you may try to find the Audial stage made with the same CS chip for a good shematic.
the 0.1 uF around the tl431 must be of a good quality.
This is fine if the CS chip has its own diode bridge smoothing stage, it can share a same secondary if you need 5V for the digital dac chip section - with a separate diodes smoothing bridge- . Just take a second econdary for the analog part of the dac chip.
Could be fine the tl431 makes a reference for darlington reg instead.
Sometimes and often the input trafo is a transparency limitation, while more dangerous to have not. the 0.1 uF in serie should be KP caps like the Wima KP02 for instance.