Current consumption on Vdrive and AVcc

Document created by analog-archivist Employee on Feb 23, 2016
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In the data sheet is just the sum current for AVcc and Vdrive specified.
What is their individual value for the normal operation mode (maximum value)?
I need this values to dimension the power supplies.

Configuration:
- all eight channels (AD7606)
- oversampling on
- internal reference
- serial interface is connected

 

For this configuration Vdrive is expected to draw less than 100uA. A typical
value is 40uA, but this depends on the capacitive load on DoutA and DoutB pins,
as well as specific Vdrive voltage level.

Figure 32 in the RevC datasheet shows typical total AVcc current consumption vs
oversampling rate. For your reference I am attaching the screenshot below.



So when oversampling mode is turned on, the AVcc current consumption is
typically close to 20mA.
For your information, the total AVCC current is shared approximately equally
between the four AVCC pins in that mode also, but up to 6mA should be allowed
on any individual AVCC pin .

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