The power consumption of
the DACx300x in sleep mode and
deep-sleep mode are provided in Section 6.20. In normal operation, the total power consumption of the device
depends on the number of channels powered on and the output mode of
each channel (voltage or current). In current-output mode, the
IDD also depends on the output range. The
IDD calculation excludes the load current. For
example, in the ±250 μA output mode with a DAC setting of +125 μA,
the total current drawn through the VDD pin is the total
IDD plus 125 μA. The total IDD in
normal operation can be calculated using Equation 1.
- IDD_SLEEP is the current through
VDD in sleep mode when all the channels
and internal reference are powered down.
- IDD_REF is the reference current, which
- either the current drawn by the reference input
impedance when VDD is used as
- or the current drawn by the internal reference,
is the current through VDD for every powered-on
Note: When an external
reference is used, the current is calculated mainly as the current
sourced from the external reference, which is equal to the reference
voltage divided by the input impedance of the VREF pin.