MAX985ESA-T

Manufacturer Part NumberMAX985ESA-T
DescriptionComparator ICs Micropower, Low-Volt age, SOT23, Rail-to-
ManufacturerMaxim Integrated Products
MAX985ESA-T datasheet
 


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

MAX985ESA-T Summary of contents

  • Page 1

    ... Digital Line Receivers Level Translators UCSP is a trademark and µMAX is a registered trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products 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. Rail-to-Rail I/O Comparators ____________________________Features ♦ ...

  • Page 2

    Micropower, Low-Voltage, UCSP/SC70, Rail-to-Rail I/O Comparators ABSOLUTE MAXIMUM RATINGS Supply Voltage ( ................................................... Current into Input Pins ......................................................±20mA IN_-, IN_ .......................................-0. OUT_ MAX985/MAX989/MAX993 ....................-0. MAX986/MAX990/MAX994.....................................-0.3V ...

  • Page 3

    Micropower, Low-Voltage, UCSP/SC70, ELECTRICAL CHARACTERISTICS (continued 2.7V to 5. PARAMETER SYMBOL OUT Output Voltage High (MAX985/MAX989 MAX993 only) OUT Rise Time (MAX985/MAX989/ t RISE MAX993 only) ...

  • Page 4

    Micropower, Low-Voltage, UCSP/SC70, Rail-to-Rail I/O Comparators __________________________________________Typical Operating Characteristics ( +25°C, unless otherwise noted SUPPLY CURRENT vs. TEMPERATURE 18 V > V IN+ IN ...

  • Page 5

    Micropower, Low-Voltage, UCSP/SC70, ____________________________Typical Operating Characteristics (continued 5V 0V +25°C, unless otherwise noted PROPAGATION DELAY vs. TEMPERATURE 450 V = 50mV OD 440 430 TO V 420 OF FINAL VALUE 410 ...

  • Page 6

    Micropower, Low-Voltage, UCSP/SC70, Rail-to-Rail I/O Comparators PIN MAX985 MAX989 MAX986 MAX990 SOT23/ SO/µMAX/ SO UCSP* SC70 — — — — — — — — — ...

  • Page 7

    Micropower, Low-Voltage, UCSP/SC70, _______________Detailed Description The MAX985/MAX986/MAX989/MAX990/MAX993/ MAX994 are single/dual/quad low-power, low-voltage comparators. They have an operating supply voltage range between 2.5V and 5.5V and consume only 11µA. Their common-mode input voltage range extends 0.25V beyond each rail. Internal hysteresis ...

  • Page 8

    Micropower, Low-Voltage, UCSP/SC70, Rail-to-Rail I/O Comparators 5) Calculate R2 as follows. For this example, choose an 8.2kΩ standard value ⎛ ⎞ THR ⎟ − − ⎜ ...

  • Page 9

    Micropower, Low-Voltage, UCSP/SC70, Zero-Crossing Detector Figure 3 shows a zero-crossing detector application. The MAX985’s inverting input is connected to ground, and its noninverting input is connected to a 100mV signal source. As the signal at the noninverting input crosses 0V, ...

  • Page 10

    ... MAX985 V 2 MAX986 CC IN IN+ 4 IN- SOT23/SC70 10 ______________________________________________________________________________________ Ordering Information (continued) PART MAX985EUK-T MAX985ESA *R PULLUP MAX986EXK-T MAX986EUK-T OUT MAX986ESA MAX989EKA-T MAX989EUA-T MAX989ESA MAX990EKA-T MAX990EUA-T MAX990ESA MAX993EUD MAX993ESD MAX994EUD MAX994ESD Note: All devices are specified over the -40°C to +85°C operating temperature range. ...

  • Page 11

    Micropower, Low-Voltage, UCSP/SC70, (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) ______________________________________________________________________________________ Rail-to-Rail I/O Comparators Package Information 11 ...

  • Page 12

    Micropower, Low-Voltage, UCSP/SC70, Rail-to-Rail I/O Comparators (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 12 ______________________________________________________________________________________ Package Information (continued) PACKAGE OUTLINE, 3x2 UCSP 21-0097 1 ...

  • Page 13

    ... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600___________________ 13 © 2007 Maxim Integrated Products ...