Espressif ESP32 Technical Reference Manual page 641

29 On-Chip Sensors and Analog Signal Processing
29.3.2 Features
• Two SAR ADCs, with simultaneous sampling and conversion
• Up to five SAR ADC controllers for different purposes (e.g. high performance, low power or PWDET /
PKDET).
• Up to 18 analog input pads
• 12-bit, 11-bit, 10-bit, 9-bit configurable resolution
• DMA support (available on one controller)
• Multiple channel-scanning modes (available on two controllers)
• Operation during Deep-sleep (available on one controller)
• Controlled by a ULP coprocessor (available on two controllers)
29.3.3 Outline of Function
The SAR ADC module's major components, and their interconnections, are shown in Figure 29-6.
Espressif Systems
Figure 29-5. SAR ADC Depiction
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