TPA3110D2: Waveform distortion problem

zhang ping

Part Number: TPA3110D2

TPA3110D2，The test signal is a standard sinusoidal input and the output is distorted. Would you please help us to see if there is any problem with the waveform? Attached is the circuit diagram.

TPA3110d2测试.pdf

over 4 years ago

0 Xiaolin Qin over 4 years ago

TI__Expert 6295 points

hello,

could you let us know why input sinewave looks very noisy, did you use AP to analysis input signal FFT? by the way, what is inductor for your selection? and gain setting of TPA3110?

Regards
Linda

0 zhang ping over 4 years ago in reply to Xiaolin Qin

Genius 3195 points

The waveform is the standard sinusoidal wave of 1 kHz generated by signal generation.

The magnetic bead parameters are HIV1812V101R-10 (/8A, 125 ohm/100 MHz, 1812).

Gain selection is 32dB。

What is the waveform problem? Sinusoidal wave is the output of Tektronix signal generator.

0 Yanming Gong over 4 years ago in reply to zhang ping

TI__Mastermind 19030 points

Hi Zhang ping,
Is the load connected or not when you capture the waveform?
If connect the load, there will be a lot of noise feedback to the input.
Disconnect the load, the input and output will become normal.

Regards,
Derek

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TPA3110D2: Waveform distortion problem