What is the acquisition period of the SAR ADC in the LPC1857

[iainrist1]

I am interested in using the LPC1857 in a new design and need to know some ADC parameters not stated in the datasheet.

What is the acquisition period of the SAR ADC in the LPC1857?

From that I can calculate analogue bandwidth and conversion period.

[soledad]

Hi,

Basic clocking for the A/D converters is provided by the APB clocks (CLK_APB3_ADC0/1). A programmable divider is included in each converter to scale this clock to the 4.5 MHz (max) clock needed by the successive approximation process. A fully accurate conversion requires 11 of these clocks.

I hope this helps,

Have a great day,
Soledad

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