General Description

The AS1970 - AS1975 are single/dual/quad comparators that operate with supplies from 2.5 to 5.5V making them perfect for all 3- and 5-volt applications. The comparators can also operate with dual supplies (±1.25 to ±2.75V), and require very little supply current (down to 8.5μA) with minimal propagation delay (300ns). Low input bias current (1.0pA, typ), low input offset voltage (0.5mV, typ), and internal hysteresis (3mV) make these comparators ideal for low-power single-cell applications including power-management and power-monitoring systems.

Key Features

CMOS Push/Pull Output Sinks and Sources 8mA (AS1970/AS1972/AS1974)

CMOS Open-Drain Output Voltage Extends Beyond VCC (AS1971/AS1973/AS1975)

Quiescent Supply Current: 8.5μA per Comparator

Internal Hysteresis: 3mV

3V/5V Logic-Level Translation

Single-Supply Operation: 2.5 to 5.5V

Common-Mode Input Voltage Range Extends 250mV Above the Rails

Low Propagation Delay: 300ns

Minimized Overall Power Consumption

Supply Current @1MHz Switching Frequency: 80μA

No Phase Reversal for Overdriven Inputs

Package Types:

- 5-pin SOT23 – AS1970/AS1971

- 8-pin MSOP – AS1972/AS1973

- 14-pin TSSOP – AS1974/AS1975

Applications

The devices are ideal for battery-powered systems, mobile communication devices, zero-crossing detectors, window comparators, level translators, threshold detectors/discriminators, ground/supply-sensing applications, IR receivers or any other space-limited application with low power-consumption requirements.