MAX9025 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – UCSP, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference

19-3241; Rev 0; 5/04
UCSP, 1.8V, Nanopower, Beyond-the-Rails
Comparators With/Without Reference
General Description
The MAX9025–MAX9028 nanopower comparators in
space-saving chip-scale (UCSP™) packages feature
Beyond-the-Rails™ inputs and are guaranteed to oper-
ate 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 suit-
able 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.
Applications
2-Cell Battery Monitoring/Management
Ultra-Low-Power Systems
Mobile Communications
Notebooks and PDAs
Sensing at Ground or Supply Line
Telemetry and Remote Systems
Medical Instruments
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
Ordering Information
PART
MAX9025EBT-T
MAX9026EBT-T
MAX9027EBT-T
MAX9028EBT-T
TEMP
RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
BUMP-
PACKAGE
6 UCSP-6
6 UCSP-6
6 UCSP-6
6 UCSP-6
TOP
MARK
ADB
ADC
ADD
ADE
Pin Configurations
TOP VIEW
(BUMPS ON BOTTOM)
B
A
1
IN+
V_CC
Selector Guide
PART
MAX9025
MAX9026
MAX9027
MAX9028
INTERNAL
REFERENCE
OUTPUT
TYPE
Yes
Push-Pull
Yes
Open-Drain
No
Push-Pull
No
Open-Drain
SUPPLY
CURRENT
(µA)
1.0
1.0
0.6
0.6
Typical Application Circuit appears at end of data sheet.
MAX9025–
MAX9028
2
REF
(V_EE)
OUT
3
IN-
V_EE
Beyond-the-Rails and UCSP are trademarks of Maxim Integrated
Products, Inc.
( ) MAX9027/MAX9028 PINS
UCSP
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.