Single-supply low-power comparator in a wafer-level package
The MAX40008ANT+T is a single general-purpose comparator from Maxim Integrated, built for low-power threshold detection and signal conditioning across a 1.7V to 5.5V supply range. Its open-drain output lets it interface with higher-voltage logic or multiple comparators on a shared pull-up bus. With a typical propagation delay of 850ns and quiescent draw of 17µA, it targets battery-monitoring, overvoltage/undervoltage lockout, and sensor threshold circuits where speed is secondary to power budget. The -40°C to 125°C operating range qualifies it for industrial and automotive under-hood environments, though it carries no formal AEC-Q100 grade in this listing. The 6-WLP package (1.08x0.73mm) is among the smallest footprints for a comparator, suited to compact handheld or module-level designs, but requires a controlled assembly process — no hand-soldering this one.
850ns propagation delay — what it means for the signal chain
At 850ns typical, this comparator is not a high-speed part. It handles DC threshold crossing, over-temperature flags, and power-good signals cleanly, but it will not track a fast PWM cycle or a MHz-range sensor edge. The 3mV internal hysteresis (typical) adds noise immunity on slowly changing inputs, reducing chatter at the switching point without external positive feedback components. The 70dB CMRR and 60dB PSRR are adequate for a general-purpose comparator operating off a regulated rail. Input offset voltage is trimmed to 5mV max, and input bias current stays under 0.14µA, so high-impedance sources (like a resistor divider from a battery) will not load the measurement significantly.
Open-drain output: level translation and wired-OR
The open-drain output sinks current to ground when active and floats when inactive. An external pull-up resistor to the desired logic rail sets the high-level voltage.
Lifecycle and sourcing posture
The MAX40008ANT+T carries an Active product status and is ROHS3 compliant.