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High-Speed, Micropower, Low-Voltage, Rail-to-Rail I/O Comparators

Product Details

Key Features

Parametric specs for Comparators
tPD (ns) (typ) 120
VOS (mV) (max) 5
VSUPPLY (Total) (V) (min) 2.5
VSUPPLY (Total) (V) (max) 5.5
# Comparators 2
Input Range Rail to Rail
to Neg. Rail
ICC per Comp. (µA) (max) 80
Logic Out Push-Pull
Oper. Temp. (°C) -40 to +85
Package/Pins SOIC (N)/8
SOT23/8
UMAX/8
Budgetary
Price (See Notes)
1.51
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Simplified Block Diagram

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Parameters

Parametric specs for Comparators
tPD (ns) (typ) 120
VOS (mV) (max) 5
VSUPPLY (Total) (V) (min) 2.5
VSUPPLY (Total) (V) (max) 5.5
# Comparators 2
Input Range Rail to Rail
to Neg. Rail
ICC per Comp. (µA) (max) 80
Logic Out Push-Pull
Oper. Temp. (°C) -40 to +85
Package/Pins SOIC (N)/8
SOT23/8
UMAX/8
Budgetary
Price (See Notes)
1.51

Key Features

  • 120ns Propagation Delay
  • 48µA Quiescent Supply Current
  • +2.5V to +5.5V Single-Supply Operation
  • Common-Mode Input Voltage Range Extends 250mV Beyond the Rails
  • Push-Pull Output Stage Sinks and Sources 8mA Current (MAX987/MAX991/MAX995)
  • Open-Drain Output Voltage Extends Beyond VCC (MAX988/MAX992/MAX996)
  • Unique Output Stage Reduces Output Switching Current, Minimizing Overall Power Consumption
  • 100µA Supply Current at 1MHz Switching Frequency
  • No Phase Reversal for Overdriven Inputs
  • Available in Space-Saving Packages:
    • 5-Pin SC70 (MAX987/MAX988)
    • 8-Pin µMAX (MAX991/MAX992)

Applications/Uses

  • Digital-Line Receivers
  • Ground/Supply Sensing
  • IR Receivers
  • Level Translators
  • Mobile Communications
  • Portable Battery-Powered Systems
  • Threshold Detectors
  • Window Comparators
  • Zero-Crossing Detectors

Description

The MAX987/MAX988/MAX991/MAX992/MAX995/ MAX996 single/dual/quad micropower comparators feature low-voltage operation and rail-to-rail inputs and outputs. Their operating voltage ranges from +2.5V to +5.5V, making them ideal for both 3V and 5V systems. These comparators also operate with ±1.25V to ±2.75V dual supplies. They consume only 48µA per comparator while achieving a 120ns propagation delay.

Input bias current is typically 1.0pA, and input offset voltage is typically 0.5mV. Internal hysteresis ensures clean output switching, even with slow-moving input signals.

The output stage's unique design limits supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. The MAX987/MAX991/MAX995 have a push-pull output stage that sinks as well as sources current. Large internal output drivers allow rail-to-rail output swing with loads up to 8mA. The MAX988/MAX992/MAX996 have an open-drain output stage that can be pulled beyond VCC to 6V (max) above VEE. These open-drain versions are ideal for level translators and bipolar to single-ended converters.

The single MAX987/MAX988 are available in tiny 5-pin SC70 packages, while the dual MAX991/MAX992 are available in ultra-small µMAX® package.

Simplified Block Diagram

MAX987, MAX988, MAX991, MAX992, MAX995, MAX996: Typical Operating Circuit MAX987, MAX988, MAX991, MAX992, MAX995, MAX996: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .