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11 years, 1 month ago.
Power consumption by ADC module in LPC 1768
Hi,
I have an MBED kit NXP LPC1768. I am converting an analog signal into an equivalent digital value. My query is
I plan to use the board to be powered through a 9V battery, I want to know the power consumed by the ADC per conversion.
Is there any ADC documentation available to find the power consumed per conversion.
Also how much current is being drawn.
Regards, MANANTS
2 Answers
11 years, 1 month ago.
The ADCs power consumption will be negligble compared to the complete systems power consumption tbh.
Okay! But is there a method to compute the power consumed by the ADC? Right now I am using only the ADC and system memory (to store converted value)! I wish to know the power consumption of the two separately.
posted by 14 Mar 2013Well you can manually measure the current while only using one of those two, but the majority will be used just by the CPU clock running, the board not being designed for low power (the voltage regulators use a ton of current), etc.
posted by 14 Mar 2013From the datasheet I got the current consumption if the clock is being run at a certain frequency! Is there a method to compute power by knowing just the current? So all we do is multiply Vcc*I consumed ??? If you could point to some material would be humbly appreciated
posted by 17 Mar 2013
11 years, 1 month ago.
@Erik Olieman: Thanks= for the prompt reply! @ALL: The power consumed can be calculated by doing Vdd*I, I rating is obtained from the datasheet! So based on Mr. Olieman's input MBED does provide a way to calculate power consumption per module!