Using The TPA112 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

 

+

 

TPA112 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 TPA112 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 F electrolytics). It can output either the signal from the the TPA112 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.

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

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Texas Instruments SLOU023A manual Signal Routing, Signal Conditioning

SLOU023A specifications

Texas Instruments SLOU023A is a technical document outlining the features and specifications of the LMH6629, a high-speed, low-noise operational amplifier designed for various analog applications. This op amp is particularly well-suited for precision signal processing, making it a popular choice in industries such as telecommunications, industrial automation, and medical electronics.

One of the main features of the LMH6629 is its high bandwidth. With a gain bandwidth product of 1.5 GHz, it supports a wide range of frequencies, enabling it to process fast-changing signals without significant distortion. This characteristic is critical in applications that require accurate signal amplification and processing, such as RF and video signal conditioning.

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