Single comparator with flexible output and fast 450ns response
The MAX986EUK+T is a single general-purpose comparator from Analog Devices, offered in a compact SOT-23-5 package. It delivers a 450ns max propagation delay, making it suitable for level detection, zero-crossing detectors, and window comparators where response time matters. The output stage supports CMOS, open-drain, rail-to-rail, and TTL logic levels, so it interfaces directly with 2.5V to 5.5V logic without an external level shifter. The open-drain option lets multiple comparators share a pull-up for wired-OR configurations.
Supply range, quiescent draw, and temperature grade
Operating from a single 2.5V to 5.5V supply (or dual ±1.25V to ±2.75V), the MAX986EUK+T fits into both single-rail and split-rail designs. Quiescent current is 24µA max, which keeps the power budget tight in battery-powered sensor interfaces. Input bias current is 1pA max at 5.5V, so high-impedance sources like photodiode amplifiers or pH probes see negligible loading. With ±3mV typical hysteresis, the comparator avoids output chatter near the threshold — useful for noisy environments like motor-drive current sensing or switch-debounce circuits.
CMRR, PSRR, and offset — what they mean for the BOM
Typical CMRR and PSRR are both 80dB. That means common-mode noise on the input pair or ripple on the supply rail is attenuated by a factor of 10,000 — the comparator sees the differential signal, not the supply bounce. In a 12-bit ADC driver or a precision threshold detector, this keeps the trip point stable. Maximum input offset voltage is 5mV at 5.5V. For a 100mV reference threshold, that is a 5% error before any temperature drift — budget this into the trip-point tolerance if the application does not allow trimming.
Active production and compliance documentation
It is ROHS3 compliant, so it meets the current EU restriction on hazardous substances without an exemption. No pin-compatible alternative is recorded on this line — the part is the current production choice for this specification.