EFM8UB1 Datasheet, PDF (10/59 Pages) Silicon Laboratories – The EFM8UB1 highlighted features are listed below

3.7 Analog
EFM8UB1 Data Sheet
System Overview
12-Bit Analog-to-Digital Converter (ADC0)
The ADC is a successive-approximation-register (SAR) ADC with 12-, 10-, and 8-bit modes, integrated track-and hold and a program-
mable window detector. The ADC is fully configurable under software control via several registers. The ADC may be configured to
measure different signals using the analog multiplexer. The voltage reference for the ADC is selectable between internal and external
reference sources.
• Up to 20 external inputs.
• Single-ended 12-bit and 10-bit modes.
• Supports an output update rate of 200 ksps samples per second in 12-bit mode or 800 ksps samples per second in 10-bit mode.
• Operation in low power modes at lower conversion speeds.
• Asynchronous hardware conversion trigger, selectable between software, external I/O and internal timer sources.
• Output data window comparator allows automatic range checking.
• Support for burst mode, which produces one set of accumulated data per conversion-start trigger with programmable power-on set-
tling and tracking time.
• Conversion complete and window compare interrupts supported.
• Flexible output data formatting.
• Includes an internal fast-settling reference with two levels (1.65 V and 2.4 V) and support for external reference and signal ground.
• Integrated temperature sensor.
Low Current Comparators (CMP0, CMP1)
Analog comparators are used to compare the voltage of two analog inputs, with a digital output indicating which input voltage is higher.
External input connections to device I/O pins and internal connections are available through separate multiplexers on the positive and
negative inputs. Hysteresis, response time, and current consumption may be programmed to suit the specific needs of the application.
The comparator includes the following features:
• Up to 10 (CMP0) or 12 (CMP1) external positive inputs
• Up to 10 (CMP0) or 12 (CMP1) external negative inputs
• Additional input options:
• Internal connection to LDO output
• Direct connection to GND
• Direct connection to VDD
• Dedicated 6-bit reference DAC
• Synchronous and asynchronous outputs can be routed to pins via crossbar
• Programmable hysteresis between 0 and ±20 mV
• Programmable response time
• Interrupts generated on rising, falling, or both edges
• PWM output kill feature
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