Datasheet

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OUTB

OUT A

Installation

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2.1.2 PSU Interface

The TAS5713EVM is powered by two power supplies connected to the MC57xx controller board: a 5V

power supply (VIN), and a 8V-to-26V (PVDD) power supply. The 3.3V level is generated from the 5V

supply by an on-board voltage regulator.

NOTE: The power-supply cable length must be minimized. Increasing the length of the PSU cable

increases the distortion of the amplifier at high output levels and low frequencies.

The maximum output-stage supply voltage depends on the speaker load resistance. See the

recommended maximum supply voltage in the TAS5713EVM data sheet.

Table 1. Recommended Power Supplies

Description Voltage Limitations (8-Ω Load) Current Recommendations

System power supply 5V 1A

Output power stage supply 8–26V 4A

(1)

The rated current corresponds to two channels, full scale.

2.1.3 Loudspeaker Connectors

CAUTION

All speaker outputs are biased at Vcc/2 and must not be connected to 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 TAS5713EVM.

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.

Figure 5. BTL Connection

2.1.4 USB Interface

The TAS5713 registers are accessed through I

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 5V 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.

2.1.5 Digital Audio Interface SPDIF

The Digital Audio Interface SPDIF (RCA/OPTO) accepts digital audio data using the I

S protocol. See the

TAS5713 data sheet for more information.

The RCA connector and the OPTO connector are the two SPDIF interfaces on the MC57xxPSIA board.

25W Digital Input Amplifier With EQ and 2-Band DRC SLOU281–January 2010

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