Texas Instruments TPA005D12 manual Inputs and Outputs

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Inputs and Outputs

3.4.6Inputs and Outputs

The TI plug-n-play audio amplifier evaluation platform is equipped with several standard conectors for audio inputs and outputs.

3.4.6.1Inputs

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.

3.4.6.2Outputs

Amplified audio output signals 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 a miniature (1/8″ ) stereo phone jack (J10), for headphones.

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)Ðthe OUT± lines from the power amplifier sockets are not tied to each other or to platform ground. This allows the TPA005D12 class-D power amplifier EVM to operate in the highly-efficient bridge-tied load configuration when driving speakers.

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±9).

Figure 3±9. Typical Headphone Plug

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Details 3-17

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Contents Users Guide Important Notice Related Documentation From Texas Instruments PrefacePage Contents Tables FiguresIntroduction Feature Highlights Description Maximum TPA005D12 Class-D EVM SpecificationsTypical OFF Quick StartAudio Power PrecautionsPlatform Preparations Quick Start List for PlatformQuick Start List for Stand-Alone Details ±1. The TI Plug-N-Play Audio Amplifier Evaluation Platform TPA005D12 Class-D Audio Power Amplifier Evaluation Module TP9 GND VDD2 TP3 1 TPA005D12 Class-D Stereo Audio Amplifier ICOverview of Class-D Audio Amplifiers ±5. Class-D Functional DiagramBridge-Tied Load BTL Operation ±6. Class-D Input and Output WaveformsClass-D Differential Inputs Control and Indicator Circuits±2. TPA005D12 Class-D EVM Test Points 6 TPA005D12 Class-D EVM Test PointsClass-D Amplifier Design Considerations EVM Insertion Installing and Removing EVM BoardsEVM Removal 2.2 S2 Ð Mute Switch Module Switches2.1 S1 Ð Shutdown Signal Conditioning Signal RoutingHeadphone Output Jack Shutdown Headphone Jack Control SignalsMute/Mode Polarity Select JP8 Mute/Mode Select JP6JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 Power RequirementsInputs Inputs and OutputsOutputs Monitor Input Connections Controls and IndicatorsOutput Connections ±11. Class-D Amplifier Frequency Response at 4 Ω TPA005D12 Class-D EVM Performance Characteristics±12. Class-D Amplifier Distortion versus Output Power at 4 Ω ± % Crosstalk Frequency TPA005D12 Class-D EVM Interconnects ±5. TPA005D12 Class-D EVM Bill of Materials TPA005D12 Class-D EVM Bill of Materials±18. TPA005D12 Class-D EVM Schematic Diagram TPA005D12 Class-D EVM Schematic10 TPA005D12 Class-D EVM PCB Layers ±19. TPA005D12 Class-D EVM Top Assembly±21. TPA005D12 Class-D EVM Top Layer ±23. TPA005D12 Class-D EVM Third Layer Details

TPA005D12 specifications

The Texas Instruments TPA005D12 is a highly regarded digital audio power amplifier that is engineered for high-performance applications. It is part of TI's TPA series, which is known for its efficient power delivery and superior sound quality. The TPA005D12 is designed to drive passive speakers while ensuring minimal power loss and efficient heat management.

One of the standout features of the TPA005D12 is its ability to provide 5 watts of continuous output power per channel into an 8-ohm load with a low total harmonic distortion (THD) rating. This makes it suitable for use in a variety of audio applications, including computer speakers, soundbars, and portable audio systems. The amplifier operates from a single supply voltage, ranging typically from 4.5V to 14V, allowing for flexible integration into different power supply environments.

The TPA005D12 adopts Class-D amplification technology, which significantly enhances power efficiency compared to traditional linear amplifiers. Class-D amplifiers convert the input audio signal into a series of pulse-width modulated signals, resulting in increased power savings and reduced heat generation. This not only improves the overall energy efficiency but also contributes to a longer operational lifespan for devices utilizing this technology.

Additionally, the TPA005D12 features an integrated thermal and short-circuit protection mechanism, which helps safeguard the amplifier from potential damage due to excessive temperatures or electrical faults. This reliability factor is crucial for manufacturers looking to create robust consumer electronics.

Another important characteristic is its integrated low-noise power supply rejection ratio (PSRR), which helps maintain sound clarity and reduces the impact of power supply noise on audio quality. The TPA005D12 also supports differential input signals, which can improve common-mode noise rejection and further enhance audio performance.

The device is offered in a compact package suitable for space-constrained applications, enabling easy integration into various designs. With a combination of low cost, high efficiency, and excellent audio performance, the Texas Instruments TPA005D12 stands out as a top choice for developers and engineers seeking reliable audio amplification solutions. Whether in home entertainment systems or personal audio devices, the TPA005D12 is designed to deliver exceptional sound quality with a minimal footprint.
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