TPA2011D1: TPA2011 THD+N vs Freq

Ian Wang

Part Number: TPA2011D1

Hi Sir,

I have one question about TPA2011, the THD+N v.s. Frequency plot shows that high frequency got worse result than low band, could you explain the reason about it?

over 5 years ago

0 Luis Fernando Rodriguez S. over 5 years ago

TI__Guru* 84915 points

Hi, Ian,

These high THD+N curves increase at high frequency due to the input amplifier loop gain. The TPA2011D1 contains a fully differential amplifier with loop gain. In general, the analog amplifiers with integrated feedback have a high THD+N at high frequencies and low loads. Please take a look at this article for more details.

https://e2e.ti.com/blogs_/archives/b/precisionhub/archive/2016/02/26/amp-up-your-cans-part-3a-distortion-in-headphone-amplifiers

Let me know if you have additional questions or comments on this.

Best regards,
Luis Fernando Rodríguez S.

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TPA2011D1: TPA2011 THD+N vs Freq