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Original question:

CC1352P: how to reduce power consumption of ADC?

CC1352P: how to increase ADC resolution in sensor controller?

Zhiyong Li (FT)
Expert 2920 points
Part Number: CC1352P


Hi,

Without calling adcDisableInputScaling(), the output from adcReadFifo() seems to cap at 3058 when an ADC input pin is connected to VCC(3.3V). With a 12Bit ADC, the full-scale reading should be as high as 4096 I expect. That is still not much for precision measurement. So my questions are:

1) Is there a way to fine turn the input scaling to take full advantage of the 12BIT resolution? Probably with help from external gain amplifier?

2) How much oversampling can help if at all? In the multi-channel continuous sampling example shipped with Sensor Controller Studio, 256 samples per channel are collected and transferred out to application MCU. By doing this, how much more BIT of resolution can this add?

Thanks,

ZL