I would have two points to (try to) further improve the SQ of your board. However after seeing your nice work I've not found any commercial isolator that already uses 4166 (except the 4166 evaluation board itself). Just as you reported, noticed improvements in SQ me too.Īlso I've other isolators using 3160, which apparently has only a lower isolation voltage compared to 4160, but I definitely prefer 4160. I use a Digital Transport instead of the PC (or Mac) and a commercial Isolator that uses Adum4160 (of which 4166 is an improvement).Īfter a quick comparison of 4160 vs 4166 datasheet it seems the differences are related to the number of pin, the High Speed feature (however 12 Mbps at least here are enough), the slightly higher insulation voltage and a new feature to reduce the jitter. I noticed more low bass appeard at first. I'm very happy that it worked from the first test^^. I'm testing it between the tinkerboard installed volumio and the AD1865 DAC. So that you don't have to worry about the power supply such as battery or linear power as much as possible.Īs for the casing, I have a 6cm long aluminum chassis so it fits right in there, I think I'll just have to mill the front and back plates. So I covered it with a common-mode noise filter and tantalum polymer with an extremely low ESR of 5 milliohms. However, power noise from the charger can enter the DAC. It can draw up to 5V 3A from a PD charger, so it can be used in professional equipment such as audio interfaces that consume a lot of power. The type C terminal is negated by a pull down resistor on the CC pin.

The external power supply of 5 volts can be used as a cell phone charger or GAN adapter. The clock is powered individually by LDO. The clock used is a 2520 size TCXO with a stability level of 0.5ppm. The board is designed to minimize the length of stubs that can be created in the USB signal line noise and abnormal transmission. I also put an ESD protection element on the input. The board is an impedance-matched 4-layer board. I believe it has a lower internal resistance and total impedance than supercap or lithium polymer battery. In the case of the optional tantalum polymer, the internal resistance is only 5 milliohms. In EASYEDA You can check the inventory of parts such as terminals and devices from the manufacturing process.Īll parts except the tantalum polymer cap and USB A type terminal were already mounted on the JLCPCB, so it took very little time to make them. It seems to be a fundamental solution to PCfi noise. In effect, the noise of the PC at the front is essentially blocked, and the clock jitter can be resolved by this reclocking isolator.Ĭonsidering that there is almost no transmission error although the USB data signal is poor. TI's chip ISOUSB211 is a redriver, while Analog device's isolator chip ADUM4166 / 4165 is also retimer.Īnalog device's isolator is a 24Mhz clock with a RETIMER function that can reset timing jitter. Recently, TI and Analog device both produce isolator chips that support 480Mbps High speed. I made an isolator board using Analog Device's ADUM4166 chip.

Multi battery isolator 702