austriamicrosystems

AS1972 Comparator IC

Low Power Dual Comparator, Push-Pull Output, MSOP 8

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Description

The AS1970 - AS1975 are single/dual/quad comparators that operate with supplies from 2.5V to 5.5V making them perfect for all 3 volt applications. The comparators can also operate with dual supplies (±1.25 to ± 2.75V), and require very little supply current (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. Large internal output drivers allow Rail-to-Rail output swings with loads of up to 8mA.

Model

Output Type

Comparators

Package

AS1970

Push/Pull

Single

SOT23-5

AS1971

Open-Drain

Single

SOT23-5

AS1972

Push/Pull

Dual

MSOP 8

AS1973

Open-Drain

Dual

MSOP 8

AS1974

Push/Pull

Quad

TSSOP 14

AS1975

Open-Drain

Quad

TSSOP 14

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Key Features

  • Low Quiescent Supply Current: 8.5µA per Comparator
  • Single-Supply Operation: 2.5V to 5.5V
  • Low Propagation Delay: 300ns
  • Internal Hysteresis: 3mV
  • Common-Mode Input Voltage Range Extends 250mV Above the Rails
  • Supply Current @1MHz Switching Frequency: 80µA
  • No Phase Reversal for Overdriven Inputs
  • CMOS Push/Pull Output Sinks and Sources 8mA (AS1970/AS1972/AS1974)
  • CMOS Open-Drain Output Voltage Extends Beyond VCC (AS1971/AS1973/AS1975)
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Applications

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

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Block diagram for AS1972 Comparator IC

Print Block diagram for AS1972 Comparator IC
AS1972 Low Voltage Dual Comparators Block Diagram

AS1972 Low Voltage Dual Comparators Block Diagram