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TLV320ADC3140: the power supply AVDD of TLV320ADC3140IRTWR

jiameng cheng

Prodigy 30 points

Part Number: TLV320ADC3140

Tool/software:

The default power supply AVDD of TLV320ADC3140IRTWR is 3.0V, and 3.0V is output through the LDO chip. Considering that the output accuracy of the LDO chip varies by 3% with temperature, the minimum voltage is 2.91V. Therefore, we would like to confirm whether AVDD supports 2.9V power supply and what impact it has on data acquisition?

+1 Lakshmi Narasimhan Badrinarayanan 5 months ago

TI__Expert 7730 points

Hi,

Let me confirm this and provide an update in the next couple of days.

Thanks and Regards,

Lakshmi Narasimhan

0 Lakshmi Narasimhan Badrinarayanan 5 months ago in reply to Lakshmi Narasimhan Badrinarayanan

TI__Expert 7730 points

Hi,

For 3V AVDD, you can operate the device with a VREF setting of 2.5V, which will also limit the input full-scale swing supported.

You can refer to this table in the datasheet for the AVDD range, VREF setting and corresponding input full-scale swing for the same.

Thanks and Regards,

Lakshmi Narasimhan