Comparator with integrated voltage reference
The MAX9119EXK: Its 800 nA maximum quiescent current suits battery-powered or always-on sensing circuits where the comparator stays powered continuously and the system budget is measured in microamps.
Noise immunity and response time
Built-in 4 mV hysteresis prevents output chatter on slowly moving or noisy input signals — the comparator switches cleanly once the differential input exceeds the hysteresis band, which is useful for threshold detection on a sensor output that drifts with temperature. Typical propagation delay is 14 µs, which sets the upper limit on the input frequency the comparator can track — for a 50 % duty-cycle square wave, the maximum toggle rate is roughly 35 kHz before the output fails to reach full swing. CMRR is 66 dB and PSRR is 40 dB typical — the 40 dB PSRR means a 100 mV ripple on the supply rail appears as roughly 1 mV of input-referred offset, which is acceptable for a 5 mV input offset comparator but worth derating in precision threshold applications.