High-Speed, Micropower, Low-Voltage, Rail-to-Rail I/O Comparators

The MAX987/MAX988/MAX991/MAX992/MAX995/ MAX996 single/dual/quad micropower comparators feature low-voltage operation and rail-to-rail inputs and outputs. Their operating voltage ranges 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 48µA per comparator while achieving a 120ns 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 MAX987/MAX991/MAX995 have a push-pull output stage that sinks as well as sources current. Large internal output drivers allow rail-to-rail output swing with loads up to 8mA. The MAX988/MAX992/MAX996 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 MAX987/MAX988 are available in tiny 5-pin SC70 packages, while the dual MAX991/MAX992 are available in ultra-small µMAX® package.

Applications

* Digital-Line Receivers * Ground/Supply Sensing * IR Receivers * Level Translators * Mobile Communications * Portable Battery-Powered Systems * Threshold Detectors * Window Comparators * Zero-Crossing Detectors

* 120ns Propagation Delay

* 48µA Quiescent Supply Current

* +2.5V to +5.5V Single-Supply Operation

* Common-Mode Input Voltage Range Extends 250mV Beyond the Rails

* Push-Pull Output Stage Sinks and Sources 8mA Current (MAX987/MAX991/MAX995)

* Open-Drain Output Voltage Extends Beyond VCC (MAX988/MAX992/MAX996)

* Unique Output Stage Reduces Output Switching Current, Minimizing Overall Power Consumption

* 100µA Supply Current at 1MHz Switching Frequency

* No Phase Reversal for Overdriven Inputs

* Available in Space-Saving Packages:

* 5-Pin SC70 (MAX987/MAX988)

* 8-Pin µMAX (MAX991/MAX992)