4
ADC
4.1 ADC introduction
The chip contains a 12-bit successive approximation analog-to-digital converter (ADC), which supports 12 external
analog inputs and several internal analog signal selections.
ADC supports the following four modes: single-shot single-channel conversion, continuous single-channel conver-
sion, single-shot multi-channel conversion, and continuous multi-channel conversion mode. The conversion result is
12/14/16bits left-justified mode. The ADC has a depth of 32 FIFOs and supports multiple interrupts and DMA opera-
tions. In addition to ordinary analog signal measurement, the ADC can also be used to measure the supply voltage.
In addition, the ADC can also be used for temperature detection by measuring the internal/external diode voltage.
4.2 ADC main features
• High performance
– 12/14/16bits conversion result output
– ADC maximum working clock is 2MHZ
– 2.0V,3.2V optional reference voltage
– DMA support
– Supports four modes: single-shot single-channel conversion, continuous single-channel conversion, single-
shot multi-channel conversion, and continuous multi-channel conversion mode
– Two input modes: single-ended and differential
– Support jitter compensation
– User can set conversion result offset value
• Analog channels
– 12 external analog channels
BL702/704/706 Reference Manual
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