Forums

migrating from 56F803 to 56F8346

Started by thomaskracke February 7, 2004
Hallo DSP'lers,

I did a project in the past with the 56F803.
Now I'm looking for a better replacement:

I need
- a better ADC
- more speed

Does anybody know if the ADC in the 56F8346 is really better than the
ADC in the 56F803? I read something about internal calibration?
How good is the internal reference-voltage of the ADC?
Is the ADC a complete re-design or is it the old one of the 56F803?

Thank you very much!

Thomas



--- In , "thomaskracke"
<thomaskracke@y...> wrote:
> Hallo DSP'lers,
>
> I did a project in the past with the 56F803.
> Now I'm looking for a better replacement:
>
> I need
> - a better ADC
> - more speed
>
> Does anybody know if the ADC in the 56F8346 is really better than
the
> ADC in the 56F803?

It is better.

> I read something about internal calibration?

There is a built-in voltage divider network, providing two data
points (Vref*0.25 and Vref*0.75), which can be used for calibration.
The utility of this feature to you depends on your application.

> How good is the internal reference-voltage of the ADC?

It is improved over the 80x series.

> Is the ADC a complete re-design or is it the old one of the 56F803?

The ADC module in the 56F8300 series is a redesign of the 80x series
incorporating lessons learned. It offers more consistent performance
over temperature and ADC clock speed. The ADC module offers
additional features, such as smart power-down/Power-up to/from low
power modes.

> Thank you very much!
>
> Thomas