The LTC2974 has a differential 16-bit delta-sigma ADC, that has a total unadjusted error (or TUE) of only ±0.25% when measuring voltage, ±0.3% when measuring current, and ±1°C when measuring temperature. For those unfamiliar, TUE is a broad measure of accuracy and, in this case, accounts for errors due to the LTC2974’s ADC gain, INL and offset, as well as the LTC2974’s internal reference accuracy. The LTC2974 also uses four high performance DACs, which utilize a proprietary soft connect feature, to precisely servo supply voltages. These DACs do a search and will not connect to the feedback node of the power supply under control until the DAC is within 1mV. In other words, the DACs will not perturb the power supply by slamming a correction voltage into its feedback node, making for smooth signal transitions. Of all the timing specifications in a Digital Power device, none is probably more important than the supervisor response time. A supervisor must be fast and deterministic, so that the Digital Power device can suppress transients before any damage is done. A time multiplexed ADC is often not fast enough, so the LTC2974 uses dedicated comparators on each channel to supervise voltages and react typically within 12µs. This very fast update rate ultimately means the LTC2974 becomes a smoke inhibitor instead of a smoke detector for the system.