AMC7836: DAC outut PSRR question

Dane Zhang

Part Number: AMC7836

Hi team,

Customer is asking the PSRR spec of the DAC output. Do we have the spec?

generally a DAC will has a large PSRR because of the internal reference. Will the buffer and the whole IC make the DAC output's PSRR be affected?

over 3 years ago

0 Paul_Frost over 3 years ago

TI__Guru 52683 points

Hi Dane,

The PSRR can affect the output, as the reference is on the AVDD domain, but the output buffers are on the AVCC/AVSS domain. The switching frequency is also critical.

Here are some curves I collected. Please note that this data is considered "as-is" and is not a PDS specification.

AMC7836 PSRR Measurements.pptx

Thanks,

Paul

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AMC7836: DAC outut PSRR question