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Micropower, Low-Voltage, UCSP/SC70, Rail-to-Rail I/O Comparators

Product Details

Key Features

Parametric specs for Comparators
tPD (ns) (typ) 300
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) 20
Logic Out Open Drain
Oper. Temp. (°C) -40 to +85
Package/Pins SOIC (N)/8
SOT23/8
UMAX/8
Budgetary
Price (See Notes)
1.25
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Simplified Block Diagram

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Parameters

Parametric specs for Comparators
tPD (ns) (typ) 300
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) 20
Logic Out Open Drain
Oper. Temp. (°C) -40 to +85
Package/Pins SOIC (N)/8
SOT23/8
UMAX/8
Budgetary
Price (See Notes)
1.25

Key Features

  • 11µA Quiescent Supply Current
  • 2.5V to 5.5V Single-Supply Operation
  • Common-Mode Input Voltage Range Extends 250mV Beyond the Rails
  • 300ns Propagation Delay
  • Push-Pull Output Stage Sinks and Sources 8mA Current (MAX985/MAX989/MAX993)
  • Open-Drain Output Voltage Extends Beyond VCC (MAX986/MAX990/MAX994)
  • Unique Output Stage Reduces Output Switching Current, Minimizing Overall Power Consumption
  • 80µA Supply Current at 1MHz Switching Frequency
  • No Phase Reversal for Overdriven Inputs
  • Available in Space-Saving Packages:
    • UCSP (MAX985)
    • SOT23 (MAX985/MAX986/MAX989/MAX990)
    • µMAX® (MAX989/MAX990)

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 MAX985/MAX986/MAX989/MAX990/MAX993/MAX994 single/dual/quad micropower comparators feature low-voltage operation and rail-to-rail inputs and outputs. Their operating voltages range 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 11µA of supply current while achieving a 300ns 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 MAX985/MAX989/MAX993 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 MAX986/MAX990/MAX994 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 MAX985 is available in a chip-scale package (UCSP™), significantly reducing the required PC board area. The single MAX985/MAX986 are available in 5-pin SC70 packages and the dual MAX989/MAX990 are available in 8-pin SOT23 packages.

Simplified Block Diagram

MAX985, MAX986, MAX989, MAX990, MAX993, MAX994: Typical Operating Circuit MAX985, MAX986, MAX989, MAX990, MAX993, MAX994: 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 .