Where would be the best place to try and measure the current consumption of the ADAU1761 while it is running? I would like to be able to measure both the DAC current and the ADC current. Any help would be appreciated.
Two jumpers are included on the ADAU1761 evaluation board for current measurements: one at the AVDD supply and one at the IOVDD supply. The AVDD supply is internally regulated to provide the digital supply inside the IC. You cannot measure the current of individual chip subsystems because they are all derived from a single AVDD supply.
In order to measure the ADAU1761's total current consumption (including ADC, DAC, DSP, and other chip subsystems), remove jumper J17 and place an ammeter across those pins.
In order to measure the ADAU1761's I/O current consumption (including serial port and GPIO pins), remove jumper J16 and place an ammeter across those pins.
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