Ultra Low-Power, Single/Dual-Supply Comparators

 

 

General Description

The MAX921–MAX924 single, dual, and quad micropower, low-voltage comparators feature the lowest

power consumption available. These comparators draw

less than 4µA supply current over temperature

(MAX921/MAX922), and include an internal 1.182V

±1% voltage reference, programmable hysteresis, and

TTL/CMOS outputs that sink and source current.

Ideal for 3V or 5V single-supply applications, the

MAX921–MAX924 operate from a single +2.5V to +11V

supply (or a ±1.25V to ±5V dual supply), and each

comparator’s input voltage range swings from the

negative supply rail to within 1.3V of the positive

supply.

The MAX921–MAX924’s unique output stage continuously sources as much as 40mA.  And by eliminating

power-supply glitches that commonly occur when comparators change logic states, the MAX921–MAX924

minimize parasitic feedback, which makes them easier to

use.

The single MAX921 and dual MAX923 provide a unique

and simple method for adding hysteresis without

feedback and complicated equa

 

 

Features

 µMAX Package—Smallest 8-Pin SO

(MAX921/MAX922/MAX923)

 Ultra-Low 4µA Max Quiescent Current

Over Extended Temp. Range (MAX921)

 Power Supplies:

Single +2.5V to +11V

Dual ±1.25V to ±5.5V

 Input Voltage Range Includes Negative Supply

 Internal 1.182V ±1% Bandgap Reference 

 Adjustable Hysteresis 

 TTL/CMOS-Compatible Outputs

 12µs Propagation Delay (10mV Overdrive)

 No Switching Crowbar Current

 40mA Continuous Source Current

 

 

 

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