TOPPING U90 High Performance USB Audio Bridge User Manual

U90 High-Performance USB Audio Bridge
**User Manual

**

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• Note : Some Android devices may not be compatible with U90.

Thank you for purchasing the Topping U90! The U90
is a high-performance USB audio bridge with coaxial, optical, AES, and IIS outputs. Rich output ports make U90 have strong usability. And it uses high- speed isolation technology, which can get rid of the ground loop noise from the PC. We believe that high-quality 1190 could bring you more fun in enjoying HIFI music. Now we recommend first reading this manual for you to correctly use all the functions of U90.

Contents list

Note : You can download the drivers and user manual on http://www.topping.audio/.

Attribute

Front panel

1-1 Sample ate indicator

| x1| x2| x4| x8| x16
---|---|---|---|---|---
44.1 kHz (PCM)| 44.1 kHz| 88.2kHz| 176.4 kHz| 352.8kHz| 705.6kHz
48kHz (PCM)| 48kHz| 96kHz| 192kHz| 384kHz| 768kHz
2.82MHz(DSC))| 2.82MHz
(DSD64)| 5.64MHz
(030128)| 11.28MHz (DS0256)| 22.56MHz
(1330512)| \

*LED breathes when the input is not successfully connected

Rear panel

2-1 11S port definition settings
2-2 115 output
2-3 AES output
2 2-4 AES output 1
2-5 Coaxial SPDIF output2
2-6 Coaxial SPDIF output
2-7 Optical SPDIF output2
2-8 Optical SPDIF output
2-9 Trigger out jack
When a device with a 12V Trigger in the jack is connected, the connected device’s power on/standby can be controlled through linked operation to this unit.
2-10 USB input
2-11 Power input (100-240VAC 50Hz/60Hz)
2-12 Power switch
Please set up the 11S interface before using 115 output

• IIS Interface phase setting
  Options| Description
  ---|---
  IIS PHASE I STD| Standard phase
  IIS PHASE I REV| Reverse phase

• MCLK selection
  Options| Description
  ---|---
  MCLK SEL 122&24| IIS’s master clock output 22.5792MHz/24.576MHz
  MCLK SEL I 45&49| IIS’s master clock output 45.1584MHz/49.152MHz
• DSD flag bit setting for the IIS interface
  Options| Description
  ---|---
  DSD Flag I Pin15| Set pin 15 as the flag bit
  DSO Flag I Pin14| Set pin 14 as the flag bit

• DSD channel setting for the IIS interface
  Options| Description
  ---|---
  IIS DSDR| I LRCLK| DSDR using LRCLK
  IIS DSDR| I DATA| DSDR using DATA

Input range

Specifications

U90 parameters

| COAX| AES| OPT| IIS-LVDS
Output Impedance| 750| 1100| null| null
Output jitter| <150ps| <100ps| <2ns| null
Output Level| 0.5Vpp| Supp| null| 3.3Vpp

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