The MAX985/MAX986/MAX989/MAX990/MAX993/MAX994 single/dual/quad micropower comparators feature low-voltage operation and rail-to-rail inputs and outputs. Their operating voltages range from 2.5V to 5.5V, making them ideal for both 3V and 5V systems. These comparators also operate with ±1.25V to ±2.75V dual supplies. They consume only 11µA of supply cur- rent while achieving a 300ns propagation delay. 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’s unique design limits supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. The MAX985/MAX989/MAX993 have a push-pull output stage that sinks as well as sources current. Large inter- nal output drivers allow rail-to-rail output swing with loads up to 8mA. The MAX986/MAX990/MAX994 have an open-drain output stage that can be pulled beyond VCC to 6V (max) above VEE. These open-drain versions are ideal for level translators and bipolar to single- ended converters. The single MAX985 is available in a chip-scale pack- age (UCSP™), significantly reducing the required PC board area. The single MAX985/MAX986 are available in 5-pin SC70 packages and the dual MAX989/MAX990 are available in 8-pin SOT23 packages.
The MAX985, MAX986, MAX989, MAX990, MAX993 and MAX994 are micropower, low‑voltage comparators with rail‑to‑rail inputs and outputs. They operate from 2.5 V to 5.5 V, consume as little as 11 pA quiescent current, and offer typical propagation delays of 300 ns. The push‑pull versions (MAX985, MAX989, MAX993) can source and sink up to 8 mA, while the open‑drain versions (MAX986, MAX990, MAX994) support pull‑up voltages beyond the supply rail.
The datasheet includes absolute maximum ratings, detailed electrical characteristics, typical operating curves, pin descriptions, package dimensions, and application notes such as additional hysteresis calculations and board layout recommendations.
| Supply Voltage Range | 2.5 V to 5.5 V |
|---|---|
| Quiescent Supply Current | 11 pA |
| Propagation Delay | 300 ns |
| Output Current (push‑pull) | 8 mA |
| Input Bias Current (typical) | 1.0 pA |
| Input Offset Voltage (typical) | 0.5 mV |
They operate from 2.5 V up to 5.5 V.
The devices consume as little as 11 pA of supply current.
The MAX985 uses a push‑pull output stage that can both source and sink current.
It can source or sink up to 8 mA of load current.