PCM1840: character

Anna

Intellectual 955 points

Part Number: PCM1840

Hi Dear,

PCM1840 is 3.3V single-ended power supply, how to achieve 2V with full scale input？

over 1 year ago

0 Jeff McPherson over 1 year ago

TI__Mastermind 35450 points

Hi Anna,

Yes AVDD is single ended 3.3V supply. 2Vrms is the full scale input by default when following the test conditions outlined in the datasheet: "at TA = 25°C, AVDD = 3.3 V, IOVDD = 3.3 V, fIN = 1-kHz sinusoidal signal, fS = 48 kHz, 32-bit audio data, BCLK = 256 × fS, TDM slave mode (unless otherwise noted)"

Best regards,
Jeff McPherson

0 Anna over 1 year ago in reply to Jeff McPherson

Intellectual 955 points

Hi Jeff，

May I ask why 2V full scale input can be achieved under this condition? How is it calculated

0 Jeff McPherson over 1 year ago in reply to Anna

TI__Mastermind 35450 points

Hi Anna,

Full scale input is arbitrary and determined during design of the ADC. It is simply a characteristic of the ADC.

Best regards,
Jeff McPherson

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PCM1840: character