Installation
2.1.1
Connecting the TAS5731EVM to MC57xxPSIA
On the right side of the MC57xxPSIA is a terminal block and another is located on the left of the
TAS5731EVM (labeled J1). Carefully place the MC57xxPSIA block above the TAS5731EVM block and
gently push down.
Figure 4. Connecting TAS5731EVM to MC57xxPSIA
2.1.2
PSU Interface
The TAS5731EVM is powered by two power supplies connected to the MC57xx controller board: a 5-V
power supply (VIN), and PVDD power supply. The 3.3-V level is generated on the board by a voltage
regulator from the 5-V supply.
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. Check the
recommended maximum supply voltage in the TAS5731 data sheet (
2.1.3
Loudspeaker Connectors
CAUTION
All speaker outputs are biased at V
CC
/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 single-ended mode,
connect the positive terminal to one output on the TAS5731EVM (A, B, C, or D), and connect the negative
terminal to ground. When connecting a speaker in BTL mode, connect the speaker’s two terminals across
two outputs on the TAS5731EVM (A and B or C and D). Note that the EVM is setup to use only channels
A and B in the SE mode, for a real application; however, any of the channels can be setup for SE mode
operation.
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.
5
SLOU331A – December 2011 – Revised August 2014
TAS5731EVM Evaluation Module
Copyright © 2011–2014, Texas Instruments Incorporated