Texas Instruments TPA3005D2EVM, Руководство пользователя

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Quick Start List for Stand-Alone Operation
2-2
2.1 Quick Start List for Stand-Alone Operation
Follow these steps to use the TPA3005D2EVM stand-alone or when
connecting it into existing circuits or equipment. Connections to the EVM
module header pins can be made via individual sockets, wire-wrapping, or
soldering to the pins, either on the top or the bottom of the module circuit board.
2.1.1 Power Supply
1) Ensure that all external power sources are set to OFF.
2) Connect an external regulated power supply, between 8.5 V and 18 V, to
the module VCC and GND pins taking care to observe marked polarity.
2.1.2 Inputs and Outputs
1) Ensure that the audio signal source level adjustments are set to minimum.
2) Connect the right and left positive audio source to the module RIN+ and
LIN+ pins, respectively. Connect the right and left negative audio source
to the module RIN− and LIN− pins, respectively.
3) If using single ended inputs, ground the LIN+ and RIN+ pins at the source
and connect the signal source to RIN− and LIN−. Conversely, RIN− and
LIN− should be grounded if RIN+and LIN+ are connected to the signal
source.
Note:
If RIN+ and LIN+ on the EVM are connected to ground, the RINP and LINP
pins on the TPA3005D2 IC are ac-grounded through C2 and C3.
2.1.3 Evaluation Module Preparations
1) Adjust the signal source level as needed.
2.1.4 Control Inputs
Note:
Refer to the TPA3005D2 data sheet for logic threshold voltage ratings.
1) SHUTDOWN: This pin is active low. A low on this pin shuts down the
amplifier; a high on this pin places the amplifier in the active state. Leaving
this pin floating also allows normal amplifier operation. Holding down
switch S1 places the amplifier in the shutdown state. Releasing S1 returns
the amplifier to the active state. The absolute maximum voltage on this
terminal is V
CC
+ 0.3 V.
2) GAIN0, GAIN1: These pins control the amplifier gain. (See Table 2−1)