Can more details be provided for this plot from the ADuCM310, ADuCM320(I), ADuCM322(I) datasheets?
Can the requirements be explained?
ADuCM310
Recommended for New Designs
The ADuCM310 is a multidie stack, on-chip system designed for diagnostic control of tunable laser optical module applications. The ADuCM310 features a...
Datasheet
ADuCM310 on Analog.com
Can more details be provided for this plot from the ADuCM310, ADuCM320(I), ADuCM322(I) datasheets?
Can the requirements be explained?
The explanation is as follows:
Expected Setup:
It is expected that the DVDD supply to the ADuCM310/32x parts will be from a 3.3V supply (+/-5%).
This supply will connect to the ADuCM310/32x via a series resistor - typically a few ohms in value.
So, there will be a voltage drop across this series resistor depending on the current consumption of the ADuCM310/32x.
ADuCM310/32x default/power on conditions:
The ADuCM310/32x default power-on reset trigger voltage is 2.85V - maximum value is 2.9V.
So, the ADuCM310/32x is not guaranteed to exit its reset state on power up until DVDD goes above 2.9V.
By default, most of the ADuCM310/32x peripherals are off - specifically the IDACs/VDACs and ADC
After Power-on - what happens?
After power-on, the internal kernel program executes and this configures the power-down voltage level (brown-out value). Typically, this is 2.79V with a maximum value of 2.83V.
This means the ADuCM310/32x will not reset itself unless the DVDD supply voltage drops below 2.83V.
Once user code begins execution, it is expected more peripherals will be enabled on the ADuCM310/32x that will cause the DVDD supply voltage to drop slightly due to the series resistor.
Once the part has exited the power-on reset state, the part can safely operate with a DVDD voltage down to 2.85V.