Tacq options, rate,

[mr_creosote]

Hi,

What is the use of Tacq and the sampling rate in ADCCON2 (pg 169-170 in nRF24LE1 Product Specification 1.6)?

They seem independent of the sample resolution. What are the default values?

Thanks!

Mahesh

[Håkon Alseth]

Hi Mahesh,

 

For the sampling rate: You can setup the ADC in a continuous mode, which is basically a timer internally in the ADC module that periodically triggers a ADC-conversion.

The other mode, single-step mode, is the asynchronous mode, where you programmatically start a adc-conversion at will.

 

Tacq is the acquisition time of the ADC and is related to how accurate or how fast you want the conversion to be. If your concern is speed or current consumption, then it is normal to set this low.

If Tacq is low, then external parameters like resistance and capacitance in what you're sampling has a greater impact, as shown in chapter 21.3.7.

 

Default settings, or the reset value of the registers, are shown in the column "reset value".

 

Cheers,

Håkon