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UCSP, 1.8V, nanoPower, Beyond-the-Rails Comparators With/Without Reference

Product Details

The MAX9025–MAX9028 nanopower comparators in space-saving chip-scale (UCSP) packages feature Beyond-the-Rails™ inputs and are guaranteed to operate down to +1.8V. The MAX9025/MAX9026 feature an on-board 1.236V ±1% reference and draw an ultra-low supply current of only 1µA, while the MAX9027/MAX9028 (without reference) require just 0.6µA of supply current. These features make the MAX9025–MAX9028 family of comparators ideal for all 2-cell battery-monitoring/management applications.

The unique design of the output stage limits supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. This design also minimizes overall power consumption under dynamic conditions. The MAX9025/MAX9027 have a push-pull output stage that sinks and sources current. Large internal-output drivers allow rail-to-rail output swing with loads up to 5mA. The MAX9026/MAX9028 have an open-drain output stage that makes them suitable for mixed-voltage system design. All devices are available in the miniature 6-bump UCSP packages.

Refer to the MAX9117 data sheet for similar comparators in 5-pin SC70 packages and the MAX9017 data sheet for similar dual comparators in 8-pin SOT23 packages.

Key Features

  • Space-Saving UCSP Package (1mm x 1.52mm)
  • Ultra-Low Supply Current
    • 0.6µA (MAX9027/MAX9028)
    • 1µA with Reference (MAX9025/MAX9026)
  • Guaranteed to Operate Down to +1.8V
  • Internal 1.236V ±1% Reference (MAX9025/MAX9026)
  • Input Voltage Range Extends 200mV Beyond-the-Rails
  • CMOS Push-Pull Output with ±5mA Drive Capability (MAX9025/MAX9027)
  • Open-Drain Output Versions Available (MAX9026/MAX9028)
  • Crowbar-Current-Free Switching
  • Internal Hysteresis for Clean Switching
  • No Phase Reversal for Overdriven Inputs

Applications/Uses

  • 2-Cell Battery Monitoring/Management
  • Medical Instruments
  • Mobile Communications
  • Notebooks and PDAs
  • Sensing at Ground or Supply Line
  • Telemetry and Remote Systems
  • Ultra-Low-Power Systems
Parametric specs for Comparators
tPD (ns) (typ) 14000
VOS (mV) (max) 5
VSUPPLY (Total) (V) (min) 1.8
VSUPPLY (Total) (V) (max) 5.5
# Comparators 1
Input Range Rail to Rail
to Neg. Rail
ICC per Comp. (µA) (max) 1
Logic Out Open Drain
Oper. Temp. (°C) -40 to +85
Package/Pins UCSP (B)/6
Budgetary
Price (See Notes)
$0.44 @1k
Parametric specs for Comparators + Reference
tPD (µs) (typ) 20
VOS (mV) (max) 5
VSUPPLY (V) (min) 1.8
VSUPPLY (V) (max) 5.5
# Comparators 1
Thresh. (V) 1.236
Oper. Temp. (°C) -40 to +85
Package/Pins UCSP (B)/6
Budgetary
Price (See Notes)
$0.70 @1k
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Simplified Block Diagram

MAX9025, MAX9026, MAX9027, MAX9028: Functional Diagram MAX9025, MAX9026, MAX9027, MAX9028: Functional Diagram Zoom icon

Design & Development

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Parameters

Parametric specs for Comparators
tPD (ns) (typ) 14000
VOS (mV) (max) 5
VSUPPLY (Total) (V) (min) 1.8
VSUPPLY (Total) (V) (max) 5.5
# Comparators 1
Input Range Rail to Rail
to Neg. Rail
ICC per Comp. (µA) (max) 1
Logic Out Open Drain
Oper. Temp. (°C) -40 to +85
Package/Pins UCSP (B)/6
Budgetary
Price (See Notes)
$0.44 @1k
Parametric specs for Comparators + Reference
tPD (µs) (typ) 20
VOS (mV) (max) 5
VSUPPLY (V) (min) 1.8
VSUPPLY (V) (max) 5.5
# Comparators 1
Thresh. (V) 1.236
Oper. Temp. (°C) -40 to +85
Package/Pins UCSP (B)/6
Budgetary
Price (See Notes)
$0.70 @1k

Key Features

  • Space-Saving UCSP Package (1mm x 1.52mm)
  • Ultra-Low Supply Current
    • 0.6µA (MAX9027/MAX9028)
    • 1µA with Reference (MAX9025/MAX9026)
  • Guaranteed to Operate Down to +1.8V
  • Internal 1.236V ±1% Reference (MAX9025/MAX9026)
  • Input Voltage Range Extends 200mV Beyond-the-Rails
  • CMOS Push-Pull Output with ±5mA Drive Capability (MAX9025/MAX9027)
  • Open-Drain Output Versions Available (MAX9026/MAX9028)
  • Crowbar-Current-Free Switching
  • Internal Hysteresis for Clean Switching
  • No Phase Reversal for Overdriven Inputs

Applications/Uses

  • 2-Cell Battery Monitoring/Management
  • Medical Instruments
  • Mobile Communications
  • Notebooks and PDAs
  • Sensing at Ground or Supply Line
  • Telemetry and Remote Systems
  • Ultra-Low-Power Systems

Description

The MAX9025–MAX9028 nanopower comparators in space-saving chip-scale (UCSP) packages feature Beyond-the-Rails™ inputs and are guaranteed to operate down to +1.8V. The MAX9025/MAX9026 feature an on-board 1.236V ±1% reference and draw an ultra-low supply current of only 1µA, while the MAX9027/MAX9028 (without reference) require just 0.6µA of supply current. These features make the MAX9025–MAX9028 family of comparators ideal for all 2-cell battery-monitoring/management applications.

The unique design of the output stage limits supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. This design also minimizes overall power consumption under dynamic conditions. The MAX9025/MAX9027 have a push-pull output stage that sinks and sources current. Large internal-output drivers allow rail-to-rail output swing with loads up to 5mA. The MAX9026/MAX9028 have an open-drain output stage that makes them suitable for mixed-voltage system design. All devices are available in the miniature 6-bump UCSP packages.

Refer to the MAX9117 data sheet for similar comparators in 5-pin SC70 packages and the MAX9017 data sheet for similar dual comparators in 8-pin SOT23 packages.

Simplified Block Diagram

MAX9025, MAX9026, MAX9027, MAX9028: Functional Diagram MAX9025, MAX9026, MAX9027, MAX9028: Functional Diagram Zoom icon

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