Texas Instruments SLOU025 manual Inputs and Outputs

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Using The TPA122 MSOP EVM With the Plug-N-Play Evaluation Platform

3.3.5Inputs and Outputs

The TI Plug-N-Play Audio Amplifier Evaluation Platform is equipped with several standard conectors for audio inputs and outputs.

3.3.5.1Inputs

In most cases, audio signals enter the platform through either a pair of RCA phono jacks (J3 and J5) or a miniature (1/8) stereo phone jack (J4). Certain signal conditioning and amplifier EVMs, however, may have additional signal input connectors mounted on the module circuit board.

The platform audio signal input jacks (J3, J4, and J5) are of the closed-circuit type, grounding the signal input lines when no plugs are inserted.

3.3.5.2Outputs

Output signals from the headphone amplifier (U5) leave the platform through a miniature (1/8) stereo headphone jack (J10). Amplified audio output signals from the power amplifiers (U2 ± U4) leave the platform through left and right RCA phono jacks (J7 and J9), left and right pairs of compression connectors for stripped speaker wires (J8), and optionally, through the headphone jack.

The audio output lines from the power amplifiers are separate all the way to the edge of the platform (output jacks J7, J8, and J9) Ð the OUT± lines from the power amplifier sockets are not tied to each other or to platform ground. This allows the power amplifier EVMs to operate in the highly-efficient bridge-tied load configuration.

The headphone jack (J10) is capacitively coupled to source select switch S3, which connects J10 to the output lines of either the headphone amplifier socket or the power amplifier sockets (Figure 3±5). When the TPA122 MSOP EVM output signal is routed to J10 by S3, signals output via J10 are returned to platform ground when a plug is inserted (Figure 3±7).

Figure 3±7. Typical Headphone Plug

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Details

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Contents Users Guide Important Notice Preface Related Documentation From Texas InstrumentsPage Contents Figures TablesIntroduction Features TPA122 Msop EVM Specifications DescriptionIntroduction Quick Start EVM JP6 JP7 JP8Precautions PowerQuick Start List for Platform Platform preparationsPower-up Quick Start List for Stand-AloneDetails ±1. The TI Plug-N-Play Audio Amplifier Evaluation Platform TPA122 Msop Audio Power Amplifier Evaluation Module ±2. TPA122 Msop EVM1 TPA122 Audio Amplifier IC ±4. TPA122 Amplifier ICModule Gain ShutdownInstalling and Removing EVM Boards EVM InsertionSignal Routing Off U2 Stereo Power Amplifier EVM±6. Shutdown Polarity Control Power Requirements Inputs and Outputs InputsUsing The TPA122 Msop EVM Stand-Alone 1 TPA122 Msop EVM Connected as a Stereo Headphone Amplifier±1. TPA122 Msop EVM Parts List

SLOU025 specifications

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In summary, Texas Instruments SLOU025 functions as an essential guide for stakeholders involved in electronics design and implementation. It underscores the features of high precision, advanced data conversion technologies, power efficiency, versatility, and a commitment to innovation that collectively enhance TI’s offerings in the market. The detailed insights provided in this document empower engineers to make informed decisions that ultimately lead to the creation of superior electronic solutions.