General Description The MAX971–MAX974 and MAX981–MAX984 single/dual/quad low-voltage comparators feature the lowest power consumption available. These micropower devices draw less than 4μA supply current over temperature (MAX971/MAX972/MAX981/MAX982), and include an internal 1.182V ±1% (MAX971/MAX973/MAX974) or ±2% (MAX981–MAX984) voltage reference and programmable hysteresis. Ideal for 3V or 5V single-supply applications, these devices operate from a single 2.5V to 11V supply (or ±1.25V to ±5.5V dual supplies), and each comparator’s input voltage ranges from the negative supply rail to within 1.3V of the positive supply. The single MAX971/MAX981 and the dual MAX973/MAX982/MAX983 provide a unique, simple method for adding hysteresis without feedback or complicated equations, simply by using the HYST pin plus two resistors. The MAX971–MAX974 and MAX981–MAX984’s opendrain outputs permit wire-ORed configurations. Thanks to an 11V output range and separate GND pin for the output transistor (MAX971/MAX974, MAX981/MAX984), these devices are ideal for level translators and bipolar to singleended converters. For similar devices with complementary output stages, see the MAX921–MAX924 (1% reference) and the MAX931–MAX934 (2% reference). Features Available in Ultra-Small Packages: UCSP™ (MAX972) μMAX (MAX9_1/MAX9_2/MAX9_3) Ultra-Low Quiescent Current (4μA, max) Over Extended Temp Range (MAX971/MAX981) Power Supplies: Single 2.5V to 11V Dual ±1.25V to ±5.5V Input Voltage Range Includes Negative Supply Internal Bandgap Reference 1.182V ±1% (MAX97_) 1.182V ±2% (MAX98_) 12μs Propagation Delay (10mV Overdrive) Output Has Separate GND Pin (MAX9_1/MAX9_4) Applications Battery-Powered Systems Threshold Detectors Window Comparators Level Translators Oscillator Circuits MAX971CPA 0°C to +70°C 8 Plastic Dip MAX971CSA 0°C to +70°C 8 SO MAX971CUA 0°C to +70°C 8 μMAX
