5.10.13 Enhanced Comparator

This device features two enhanced comparators: eCOMP0 and eCOMP1. The enhanced comparator is an analog voltage comparator with a built-in 6-bit DAC as an internal voltage reference. The integrated 6-bit DAC can be set to 64 steps for the comparator reference voltage. This module has 4-level programmable hysteresis and configurable power modes: high-power mode or low-power mode.

The eCOMP0 supports a propagation delay up to 1 µs in high-power mode. In low-power mode, eCOMP0 supports 3.2-µs delay with 1.5-µA leakage at room temperature, which can be an ideal wake-up source in LPM3 for a voltage monitor.

The eCOMP1 supports a propagation delay up to 100 ns in high-power mode. In low-power mode, eCOMP1 supports 320-ns delay with 10-µA leakage at room temperature.

Both eCOMP0 and eCOMP1 contains a programmable 6-bit DAC that can use internal shared reference (1.5, 2.0, or 2.5-V) for high precision comparison threshold. In addition to internal shared reference, a low-power 1.2-V reference is fixed at channel 2 of both inverting and non-inverting path that allows the DAC turned off for saving powers.

The eCOMP0 supports external inputs and internal inputs (see Table 5-23) and outputs (see Table 5-25)