Power Supply Setup; Digital Audio Inputs/Outputs; Master/Slave Mode; Recommended Supply Voltages For Dac8Dit2 Board - Texas Instruments TAS3108EVM2 User Manual

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2.3

Power Supply Setup

The TAS3108EVM2 is powered via the DAC8-DIT2 board or another output board, like a
TAS5086-5186EVM. The DAC8-DIT2 board generates a +5-V supply that is fed to the TAS3108EVM2.
The +5-V supply is further regulated to +3.3 V with the aid of a low-dropout linear regulator, U31.
Set the power supplies to ±15 V, switch off the power supply, connect all cables to the EVM, and switch
on the power supply. Current consumption should be less than is shown in
off the power supply and double check the cabling.
DESCRIPTION
+15 V
–15 V
CAUTION
Applying voltages above the limitations given in the table above
may cause permanent damage to your hardware.
2.4

Digital Audio Inputs/Outputs

The digital audio inputs can be connected to the board in two ways, either in the SPDIF format on the
coaxial connector or optical TosLink input or in I2S format on connector J12. The pinouts are shown in
Section 3.5 and Section
The digital audio outputs can be both SPDIF and I2S. SPDIF format is output on the coaxial connector
(J62) or optical TosLink® connector (J61), or I2S format is output on connector J22. Jumpers J301 and
J302 select the SDATA line to feed to the SPDIF transmitter.
2.5

Master/Slave Mode

The TAS3108EVM2 is delivered in Slave mode.
The SPDIF receiver, on the input board, is the MCLK clock master in this system.
The digital audio outputs can be both SPDIF and I2S. SPDIF format is output on coaxial connector, J62,
or optical TosLink, J61, or in I2S format on connector J22. Jumpers J301 and J302 selects the SDATA
line to feed to the SPDIF transmitter.
After each reset, either auto-generated during power-up sequence or manual pressing RESET button, the
input-USB board is always in the following configuration:
• Mute enabled
• Analog input set to 48-kHz sample rate
SLEU065A – SEPTEMBER 2005 – Revised NOVEMBER 2006
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Table 2-1. Recommended Supply Voltages for DAC8DIT2 Board
VOLTAGE LIMITATIONS
+14.5 V to +15.5 V
–15.5 V to –14.4V
3.6.
Table
CURRENT REQUIREMENT
0.3 A
0.1 A
Power Supply Setup
2-1. If it is higher, switch
CABLE
J31 pin 2
J31 pin 1
Quick Setup Guide 15