User's Guide
SLOU224–April 2008
TA5704EVM 4-Channel Digital Audio Power Amplifier with Hardware Control
1Overview
TAS5704 customer evaluation module (EVM) demonstrates the integrated circuit (IC) TAS5704 from Texas Instruments (TI).
TAS5704 is a 4-channel device with an I2S/RJ/LJ digital audio stream input and amplified PWM signal out. The subwoofer PWM signal is provided to an external class D power stage (TAS5601), which uses a LC demodulation filter to drive a subwoofer. For detail information about the TAS5704 device review the device data sheet, document number SLOS563.
TAS5704 is designed to drive two 8-Ω loudspeakers up to 20W per channel (10%THD+N) in a BTL configuration. The TAS5704EVM can also be configured to drive four, 4-Ωspeakers in a single-ended (SE) configuration. Finally, the TAS5704EVM can be configured to drive 2 single-ended speakers plus 1 bridge-tied speaker (2.1 mode). Review the board schematic, and TAS5601 documents for additional information and more specific application information on the subwoofer daughter card and connector.
TAS5704EVM, together with other TI components on this board, is a complete 4 channel digital audio amplifier system, which includes digital input (SPDIF), analog inputs via ADC, and other features like mute, power down, output configuration control, format control, and gain control.
SPDIF/
Optical,Coax
2CH AnalogInput fromOtherSource/ DigitalOut
Left |
Right |
Subwofer |
PWMout |
TAS5601EVM2 |
Figure 1. 2-Channel (BTL) Configuration with External Subwoofer EVM (TAS5601EVM2)
SLOU224–April 2008 | TA5704EVM 4-Channel Digital Audio Power Amplifier with Hardware Control | 7 |
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