LPC55XX ADC Convertion Time

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LPC55XX ADC Convertion Time

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ray_deng1
Contributor III

Dears,

  As we known, LPC55XX ADC sample ratw is 2MHz, can I know the ADC convertion time?

Thanks & BRs,

Ray

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ZhangJennie
NXP TechSupport
NXP TechSupport

HI Ray,

This data are not documented.

Please let me know

- Your chip part number?

- what application do you work with LPC55?

Thanks,

Jun Zhang

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ray_deng1
Contributor III

Hi Jennie,

   Thanks for your help, 

   The P/N is LPC5512JBD100

    It is used for Environment Detecting Device, which require 16-bit ADC.

Thanks & BRs,

Ray

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ZhangJennie
NXP TechSupport
NXP TechSupport

Hi 

ADC conversion time should include  sample time and actual conversion time. 

please refer below table,

sampling time is tsampling. conversion time is conversion cycles * ADC clock period

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Have a great day,
Jun Zhang

 

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francisy
Contributor I

Hi Jun Zhang, 

According to your table, does LPC5528 support 48MHz adc clock frequency?

BR,

Francis

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ZhangJennie
NXP TechSupport
NXP TechSupport

Francis,

24MHz is for LPC55S2x/6x,  the ADC sample rate is 1Msps.

48MHz is for LPC55S1x,       the ADC sample rate is 2Msps.

Best Regards

Jun Zhang

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arimendes
Contributor III

Hi Jun Zhang,

  I would like to know if tsampling can be 62.5nS even for 16-bit resolution.

 Thanks,

 Ari

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ZhangJennie
NXP TechSupport
NXP TechSupport

yes

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ray_deng1
Contributor III

Hi Jennie,

   Got it with many thanks,

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ZhangJennie
NXP TechSupport
NXP TechSupport

You are welcome!

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