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MAX9025, MAX9026, MAX9027, MAX9028

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

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Active: In Production.

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.

Data Sheet

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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
   

Key Specifications:

Comparators
Part Number Comp-
arators
tPD
(ns)
Input Range VSUPPLY (Total)
(V)
VSUPPLY (Total)
(V)
ICC per Comp.
(µA)
VOS
(mV)
VOS
(mV)
Logic Out Oper. Temp.
(°C)
Budgetary
Price
typ min max max typ max See Notes
MAX9027  1 14000
Rail to Rail
to Neg. Rail
1.8 5.5 1 0.3 5 Push-Pull -40 to +85 $0.46 @1k
MAX9028  Open Drain $0.42 @1k
See All Comparators (84)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


Comparators + Reference
Part Number Comp-
arators
Thresh.
(V)
Internal Ref. Accuracy
(%)
tPD
(µs)
VSUPPLY
(V)
VSUPPLY
(V)
ICC
(µA)
Prog. Hyst. VOS
(mV)
VOS
(mV)
Logic Out Oper. Temp.
(°C)
Budgetary
Price
typ min max max typ max See Notes
MAX9025  1 1.236 1 20 1.8 5.5 1.7 No 0.3 5 Push-Pull -40 to +85 $0.67 @1k
MAX9026  Open Drain
See All Comparators + Reference (48)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.



Diagram

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

More Information

Topmark Coding MAX9025
Topmark Coding MAX9026
Topmark Coding MAX9027
Topmark Coding MAX9028

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Document Ref.: 19-3241 Rev 1; 2011-08-01
This page last modified: 2011-08-01