Texas Instruments TAS5709 Evaluation Module TAS5709EVM TAS5709EVM 데이터 시트
제품 코드
TAS5709EVM
2.1.3
Loudspeaker Connectors
+
–
OUT B
OUT A
2.1.4
USB Interface
2.1.5
Digital Audio Interface SPDIF
Installation
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Table 1. Recommended Power Supplies
Description
Voltage Limitations (8-
Ω
Load)
Current Recommendations
System power supply
5 V
1 A
Output power stage supply
8–24 V
4 A
(1)
(1)
The rated current corresponds to two channels, full scale.
CAUTION
All speaker outputs are biased at Vcc/2 and must not be connected to ground
(e.g., through an oscilloscope ground).
(e.g., through an oscilloscope ground).
Loudspeaker connections vary by device setup. When connecting a speaker in BTL mode, connect the
speaker’s two terminals (A and B or C and D) across two outputs on the TAS5707/09EVM.
speaker’s two terminals (A and B or C and D) across two outputs on the TAS5707/09EVM.
Speakers or loads can be connected to the outputs A-D with clip leads, or cables can be made
with female connectors (JST VHR-2N) that can mate to male connectors on the EVM board.
with female connectors (JST VHR-2N) that can mate to male connectors on the EVM board.
Figure 5. BTL Connection
The TAS5707/09 registers are accessed through I
2
C™ bus lines SDA and SCL. The USB circuit and USB
connector on the MC57xxPSIA board facilitates the connection between a host computer and the device.
The EVM USB circuit is powered by the 5-V USB line of the host PC and is independent of the power
supplies available on the board. The USB device that is used is a TAS1020B from Texas Instruments.
The EVM USB circuit is powered by the 5-V USB line of the host PC and is independent of the power
supplies available on the board. The USB device that is used is a TAS1020B from Texas Instruments.
The Digital Audio Interface SPDIF (RCA/OPTO) accepts digital audio data using the I
2
S protocol. See the
TAS5707/09 data sheet for more information.
The RCA connector and the OPTO connector are the two SPDIF interfaces on the MC57xxPSIA board.
The switch S3 toggles between the OPTO and RCA connector to accommodate the signal source. When
the RCA cable or optical cable is connected and the signal source is powered up, verify that the SPDIF
lock indicator (blue LED5) illuminates, confirming that a viable signal is available to the device. Install a
jumper on JP4 across the middle pin and the pin marked SPDIF to connect the digital source to SDIN1.
Install a jumper on JP5 to connect the digital source to SDIN2.
The switch S3 toggles between the OPTO and RCA connector to accommodate the signal source. When
the RCA cable or optical cable is connected and the signal source is powered up, verify that the SPDIF
lock indicator (blue LED5) illuminates, confirming that a viable signal is available to the device. Install a
jumper on JP4 across the middle pin and the pin marked SPDIF to connect the digital source to SDIN1.
Install a jumper on JP5 to connect the digital source to SDIN2.
For detailed information on how the data and clocks are provided to the TAS5707/09, see the schematic
appearing at the end of this document and the DIR9001 device data sheet (
appearing at the end of this document and the DIR9001 device data sheet (
TAS5707EVM (TAS5709EVM) User's Guide
6
SLOU231B – December 2008 – Revised January 2009