TIVA C peripheral(ADC) current consumption?

Prad1 said:

current consumption of the ADC at any specific condition...
This value may be required in order to design a proper power supply and a reference

Pardon - is the design of a power supply - so close to the "expected" max draw contribution of a single MCU peripheral - especially wise?  Might such (likely) current restriction rise up to "bite" - should subsequent - design additions arrive?   (i.e. client requires "another feature" - do not ask how we know...) 

Past MCUs here/elsewhere noted "peak" currents during power-up.   Your supply must meet this requirement.  

Our sense is that you may unfairly burden the MCU (and potentially cause "difficult to diagnose" issues) by "under-powering" any MCU...

As this device doesn't support external reference, the power supplied to
VDDA will be the reference voltage.
And according to my understanding Maximum current drawn will be when ADC is ON
and it will be the significant current if there are no other peripherals used.
Our customer wants to know this value to improve analog performance with a proper supply,
as they need a very accurate ADC conversions.

Most of the MCU's like STM does provide the details about peripheral current
consumption in their Data manual.
Is it not possible or don't we have the data measured by TI?

Is it possible to employ "only" the ADC peripheral?  Does not the MCU do something - at some time - w/this data?  (requiring clocking - other peripherals)  Can you/client guarantee that MCU demands will not - at later point - increase?

Unsure if MCU (any vendor) is "best choice" to achieve your, "very accurate ADC conversion!"  (serious ADCs exist - this/other vendors)

Again - while percolating - live measurements serve some purpose...

As I have mentioned "peripheral" in particular,it doesn't mean there is no CPU,
it will be CPU + ADC. Isn't it possible to OFF other peripherals if not necessary?
Ignoring the reason we need the data, I just don't understand why other vendors
provide the details and why not TI?

I don't know about other customers, but in our case most of the customers
start evaluating the device only after they feel the specs really match their
requirements and only then they start using the device to make the "live measurements".
I thought this place would be helpful to get some useful data.
Unlike this forum, we get all the necessary data and appropriate suggestions in MSP430 forum.

Hi,

You have the needed data in table 24-40 on page 1390 of the user manual.

Petrei 

Thank you,

But I couldn't find the data for ADC..it shows the current consumption
for the whole device with Peripherals = All OFF/ON
but not for the particular peripheral.
Just to in case here is the sample datasheet(Table 19 page 50) of other MCU which mentions such data..

Hi,

In that table, IDDA is for ADC - if other analog peripherals (only analog comparators - it is small enough) this give you an idea of analog power supply characteristics. For the rest, better to measure them, as @cb1- advised you. Anyway, if making comparison with another brands, take into account that figures are typical, for a specified frequency - and you must make some calculations to find out the real estimates...

Petrei

Thank you so much for the information.Your support is very helpful.
We will assume that the Current Consumption IDDA(Peripherals All ON)
applies for both ADC0+ADC1= ON and also the comparator.
We shall certainly make real estimates once we get the devices.