The MAX9039–MAX9043 and MAX9050–MAX9053 feature combinations of low-power comparators and precision voltage references. Their operating voltage range makes them ideal for both 3V and 5V systems. The MAX9039/MAX9040/MAX9041/MAX9050/MAX9051 have a single comparator and reference consuming only 40µA of supply current. The MAX9042/MAX9043/ MAX9052/MAX9053 have dual comparators and one reference, and consume only 55µA of supply current. Low-voltage operation and low supply current make these devices ideal for battery-operated systems. The comparators feature rail-to-rail inputs and outputs, with a common-mode input voltage range that extends 250mV beyond the supply rails. Input bias current is typically 1.0pA, and input offset voltage is typically 0.5mV. Internal hysteresis ensures clean output switching, even with slow-moving input signals. The output stage features a unique design that limits supply current surges while switching, virtually eliminating supply glitches typical of many other comparators. This design also minimizes overall power consumption under dynamic conditions. The comparator outputs have rail-to-rail, push-pull output stages that sink and source up to 8mA. The propagation delay is 400ns, even with the low-operating supply current. The reference output voltage is set to 1.23V in the MAX9039, to 2.048V in the MAX9040–MAX9043, and to 2.500V in the MAX9050–MAX9053. The MAX9040– MAX9043 and the MAX9050–MAX9053 are offered in two grades.
The MAX9039‑MAX9043 and MAX9050‑MAX9053 families combine low‑power comparators with precision voltage references in a single‑chip UCSP/SOT23 package. They operate from 2.5 V to 5.5 V, draw as little as 40 µA (single‑comparator) or 55 µA (dual‑comparator) and feature rail‑to‑rail inputs and outputs.
Key features include 400 ns propagation delay, 8 mA push‑pull output, 0.5 pA input bias current, and reference voltages of 1.23 V, 2.048 V or 2.500 V depending on the part. The datasheet provides absolute‑maximum ratings, electrical characteristics for A‑ and B‑grade devices, pin configurations, and package dimensions.
| Supply Voltage Range | 2.5 V to 5.5 V |
|---|---|
| Quiescent Supply Current (single comparator) | 40 µA |
| Quiescent Supply Current (dual comparator) | 55 µA |
| Propagation Delay | 400 ns |
| Output Current Capability | 8 mA sink/source |
| Input Offset Voltage (A‑grade) | 0.5 mV typical |
| Input Bias Current | 1 pA typical |
| Reference Output Voltage (MAX9039) | 1.23 V |
They operate from 2.5 V to 5.5 V.
The typical propagation delay is 400 ns.
MAX9039 provides 1.23 V, MAX9040‑MAX9043 provide 2.048 V, and MAX9050‑MAX9053 provide 2.500 V.