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

3.3.2Signal Routing

Signal flow on the platform is controlled by two signal routing switches, as shown in Figure 3±5.

Figure 3±5. Platform Signal Routing and Outputs

R

 

Audio

U1

Signal

Input

Conditioning

 

L

 

Off

S2

On

U2 Stereo Power

Amplifier EVM

U3

 

 

+

 

Mono Power

R

 

R

 

Amplifier EVM

 

 

±

J7, J8, J9

 

 

 

 

 

 

 

 

Speaker

U4

 

 

±

Outputs

 

 

 

Mono Power

L

 

L

 

Amplifier EVM

 

 

+

 

 

U2 ± U4

 

 

 

 

 

 

R

 

U5

R

 

+

 

TPA122 MSOP

 

GND

±

J10

Headphone

S3

 

Headphone

 

 

Amplifier EVM

L

 

±

Output

 

 

 

+

 

 

 

 

L

 

 

U5

 

 

 

3.3.2.1Signal Conditioning

The audio signal from the input jacks can be applied to the signal conditioning socket (U1) if an EVM is installed there, or socket U1 can be bypassed and the audio input signal applied directly to the inputs of the TPA122 power amplifiers.

-Switch S2 selects or bypasses signal conditioning.

3.3.2.2Headphone Output Jack

Switch S3 is the source select for the stereo headphone output jack, J10. The headphone jack is capacitively coupled (via 470 μF electrolytics). It can output either the signal from the the TPA122 MSOP headphone amplifier in socket U5 or the signal from power amplifiers installed in socket U2 or in sockets U3 and U4, as determined by the setting of headphone source select switch S3.

When S3 is set to the headphone amplifier position (U5), the headphone jack is connected to the headphone amplifier EVM output lines. When a plug is inserted into the jack, signals output through J10 are returned to platform ground. A switch inside the headphone jack produces a control signal that can be routed to the headphone amplifier socket to shutdown the TPA122 MSOP EVM when the headphone plug is removed.

-Switch S3 connects the headphone jack to either the headphone amplifier platform socket (U5) or to the platform power amplifier sockets (U2 ± U4).

Details 3-7

Page 21
Image 21
Texas Instruments SLOU025 manual Signal Routing, Off U2 Stereo Power Amplifier EVM

SLOU025 specifications

Texas Instruments (TI) is renowned for its extensive portfolio of analog and mixed-signal integrated circuits, with the SLOU025 document detailing a very specific product that focuses on precision applications in various electronics. This document, often referred to in the industry, serves as a comprehensive resource for engineers and designers looking to understand the capabilities of TI's offerings.

One of the main features highlighted in SLOU025 is the high level of precision. The products covered in this document are designed for applications requiring low noise and high accuracy. This characteristic is critical in fields like telecommunications, industrial automation, and medical devices, where even minor inaccuracies can lead to significant system errors.

SLOU025 showcases a range of technologies utilized in TI products, including advanced data conversion techniques. These technologies allow for the seamless integration of multiple functions within a single chip, reducing the overall footprint of electronic designs. This integration not only enhances performance but also simplifies the design process for engineers, enabling faster time-to-market for new products.

Another important characteristic mentioned is power efficiency. Many of the devices described in SLOU025 prioritize low power consumption while maintaining high performance levels. This is particularly important in battery-powered and portable applications, where energy efficiency has a direct impact on the overall usability and lifespan of the device.

The document also emphasizes the versatility of Texas Instruments’ products. With various configurations available, engineers can select the most suitable option for their specific applications, whether it be for automotive, communication, or consumer electronics. This adaptability makes TI components highly sought after in the competitive semiconductor market.

Furthermore, SLOU025 illustrates the commitment of Texas Instruments to continuous innovation. The company invests heavily in research and development to stay at the forefront of technology advancements, which is reflected in the superior performance metrics of its devices.

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.