How to configuarte sample time of MPC5746R SAR ADC

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How to configuarte sample time of MPC5746R SAR ADC

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曾经怀念
Contributor II

Hi all

   There are some requirements in MPC5746R datasheet 

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   But only the INPSAMP register can config

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extra information

SAR CLK = 50 MHZ

ADC_MCR[ADCLKSEL] = 1(ADC clock frequency is equal to bus clock)

One shot mode

configuration tool :EB Tresos

thanks

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3 Replies

614 Views
PetrS
NXP TechSupport
NXP TechSupport

Hi,

conversion time is discussed and explained with examples within chapter 35.2.5.12 Conversion time of the device Reference Manual. INSAMP must be set to value you do not exceed datasheet specification (tsample). 

BR, Petr  

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614 Views
曾经怀念
Contributor II

Hi petr

   it's my mistake. 

   so the min sample time = 0.25 * 50 = 12.5, is the better config for sample time larger than 13

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614 Views
PetrS
NXP TechSupport
NXP TechSupport

you are right.

BR, Petr

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