Dual comparator with 4 mV hysteresis and 228 ns propagation delay
The MAX9032AUA+ is a dual general-purpose comparator from Maxim Integrated, supplied in an 8-uMAX/uSOP package. It combines a 4 mV typical hysteresis with a 228 ns maximum propagation delay, making it suited for threshold detection and signal-conditioning circuits where fast, clean transitions are needed without external positive feedback.
Input offset and bias — what the numbers mean for the BOM
For a high-impedance source (e.g., a 10 kΩ thermistor divider), the offset error from bias current is negligible — under 80 nV — but the 1 mV offset itself sets the detectable threshold floor. If the application requires sub-mV trip points, an external offset-nulling resistor or a precision comparator is needed. Common-mode rejection and power-supply rejection are both 100 dB typical. This means the trip point shifts less than 10 µV per 1 V of common-mode or supply change — useful when the comparator shares a noisy 3.3 V rail with a switching regulator.
Output flexibility and temperature range
The output stage is CMOS, rail-to-rail, and TTL-compatible — it drives logic inputs directly without a pull-up resistor when the supply matches the logic rail. The -40°C to +125°C operating temperature covers automotive under-hood and industrial enclosure environments.