Micropower, Ultra-Small, Single/Dual/Quad Single-Supply Comparators

The MAX9021/MAX9022/MAX9024 single/dual/quad comparators are optimized for low-power consumption while still providing a fast output response. They are designed for single-supply applications from 2.5V to 5.5V, but can also operate from dual supplies. These comparators have a 3µs propagation delay and consume 2.8µA of supply current per comparator over the -40°C to +125°C operating temperature range. The combination of low-power, single-supply operation down to 2.5V, and ultra-small footprint makes these devices ideal for portable applications.

The MAX9021/MAX9022/MAX9024 have 4mV of built-in hysteresis to provide noise immunity and prevent oscillations even with a slow-moving input signal. The input common-mode range extends from the negative supply to within 1.1V of the positive supply. The design of the comparator-output stage substantially reduces switching current during output transitions, eliminating powersupply glitches.

The MAX9021 single comparator is available in tiny 5-pin SC70 and SOT23 packages. The MAX9022 dual comparator is available in 8-pin SOT23, µMAX®, and SO packages, and the MAX9024 quad comparator is available in 14-pin TSSOP and SO packages.

Applications

* Battery-Powered * Digital Line Receivers * Keyless Entry Systems * Mobile Communications * Photodiode Preamps * Portable Systems * Sensor-Signal Detection * Threshold Detectors/Discriminators

* Low-Cost Solution Available in Space-Saving SC70 Packages (Half the Size of SOT23)

* Low 2.8µA Supply Current

* 3µs Propagation Delay

* Internal 4mV Comparator Hysteresis

* Comparator Output Swings Rail-to-Rail

* 2.5 to 5.5V Single-Supply Voltage Range

* No Phase Reversal for Overdriven Inputs

* Space-Saving Packages

* 5-Pin SC70 (MAX9021)

* 8-Pin SOT23 (MAX9022)

* 8-Pin µMAX (MAX9022)

* 14-Pin TSSOP (MAX9024)