MAX985_07 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – Micropower, Low-Voltage, UCSP/SC70, Rail-to-Rail I/O Comparators

19-1229; Rev 4; 1/07
Micropower, Low-Voltage, UCSP/SC70,
Rail-to-Rail I/O Comparators
General 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 cur-
rent 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 inter-
nal 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
V_CC to 6V (max) above V_EE. These open-drain versions
are ideal for level translators and bipolar to single-
ended converters.
The single MAX985 is available in a chip-scale pack-
age (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.
Selector Guide
PART
MAX985
MAX986
MAX989
MAX990
MAX993
MAX994
COMPARATORS
PER PACKAGE
1
1
2
2
4
4
OUTPUT
STAGE
Push-Pull
Open-Drain
Push-Pull
Open-Drain
Push-Pull
Open-Drain
____________________________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 V_CC
(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)
Ordering Information
PART
PIN-PACKAGE
TOP
MARK
PKG
CODE
MAX985EBT-T
MAX985EXK-T
6 UCSP-6
5 SC70-5
AAY
ABK
B6-1
X5-1
Note: All devices are specified over the -40°C to +85°C operating
temperature range.
Ordering Information continued at end of data sheet.
Typical Application Circuit appears at end of data sheet.
Pin Configurations
TOP VIEW
(BUMPS ON BOTTOM)
Applications
Portable/Battery-
Powered Systems
Mobile Communications
Zero-Crossing Detectors
Window Comparators
Level Translators
Threshold Detectors/
Discriminators
Ground/Supply-Sensing
Applications
IR Receivers
Digital Line Receivers
UCSP is a trademark and µMAX is a registered trademark of
Maxim Integrated Products, Inc.
IN+ B1
A1 V_EE
MAX985
IN- B2
A2 OUT
N.C. B3
A3 V_CC
UCSP
Pin Configurations continued at end of data sheet.
________________________________________________________________ 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.