ACMP – Analog Comparator

Quick Facts

What?

The Analog Comparator is available in Energy Mode 0 to Energy Mode 3 and compares two analog signals and returns a digital value telling which is greater.

Why?

Applications often do not need to know the exact value of an analog signal, only if it has passed a certain threshold. Often the voltage must be monitored continuously, which requires extremely low power consumption.

How?

Available in all energy modes and using down to 50 nA, the ACMP can wake up the system when input signals pass the threshold. The Analog Comparator is used when comparing the voltage of two analog inputs, with a digital output indicating which input voltage is higher. Inputs can either be one of the selectable internal references or from external pins. Response time and thereby also the current consumption can be configured by altering the current supply to the comparator.