PCM2903: Does it digitize Voltage or Power?

Henrik Rosenø

Part Number: PCM2903

Hi!

I am using the PCM2903 ADC to digitize measurements. So my question is whether the digital output of the ADC is a digitalization of the Voltage (Volt) or the Power (Watt)?

Since these are not proportional: P = V*V / R

5 months ago

+1 Jeff McPherson 5 months ago

TI__Mastermind 26995 points

Hi Henrik,

Most ADCs (including the PCM2903) digitize voltage seen at the input. With a known input impedance, you could further calculate the power delivered to the ADC by measuring the digital data if you needed to.

Best regards,
Jeff McPherson

0 Henrik Rosenø 5 months ago in reply to Jeff McPherson

Prodigy 170 points

Voltage - that's perfect. :-)

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PCM2903: Does it digitize Voltage or Power?