A Cable that Complies with the USB2.0 Standard Normal OTG cable for Hi-Fi audio loves to use DIY cable or ordinary industrial Tin-plated cable as cord, which rarely has a 90Ohm featured impedance nor shielding that complies with the USB standard. Resulting in a poor performance.
Impedance matching of USB Bus The USB data lines, D- and D+, should be routed as a differential pair. The trace impedance should be matched to the USB cable differential impedance, which is nominally 90 ohms for the signal pair. This allows routing of very closely spaced differential pairs that use little cable area.
The OEOTG cable utilized Made in Japan cord that complies with the USB2.0 Standard. With 90Ohm impedance and 100% aluminum foil shielding that complies with the UL813 Standard, the cable is ready for providing a superior sound quality. The DATA cord consists of a pair of 28AWG Annealed OFC cables, with an expanded PVC coating that ensures the purity of the signal. The POWER cord consists of a pair of 26AWG Annealed OFC cables, which fulfills the needs of power supply of audio grade products. - Silver-Contained Audio Grade Solder Used - Zinc alloy chrome plating - Enhanced Shielding, & High permeability
Most of the Lightning OTG cables, which have output of 3.3V 100mA cannot fulfill the need for portable DACs. We redesigned the circuit, which the OEOTG cable can achieve a 5V 200mA output.