MAX995

Manufacturer Part NumberMAX995
DescriptionThe MAX987/MAX988/MAX991/MAX992/MAX995/ MAX996 single/dual/quad micropower comparators feature low-voltage operation and rail-to-rail inputs and outputs
ManufacturerMaxim
MAX995 datasheet
 


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19-1266; Rev 2; 1/07
High-Speed, Micropower, Low-Voltage,
SOT23, Rail-to-Rail I/O Comparators
________________General Description
The MAX987/MAX988/MAX991/MAX992/MAX995/
MAX996 single/dual/quad micropower comparators
feature low-voltage operation and rail-to-rail inputs and
outputs. Their operating voltage ranges 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 48µA per compara-
tor while achieving a 120ns propagation delay.
Input bias current is typically 1.0pA, and input offset volt-
age 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
MAX987/MAX991/MAX995 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 MAX988/MAX992/MAX996 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 MAX987/MAX988 are available in tiny 5-pin
SC70 packages, while the dual MAX991/MAX992 are
available in ultra-small 8-pin SOT23 and µMAX
ages.
Selector Guide
COMPARATORS
PART
PER PACKAGE
MAX987
1
MAX988
1
MAX991
2
MAX992
2
4
MAX995
MAX996
4
Portable/Battery-
Threshold Detectors/
Powered Systems
Discriminators
Mobile Communications
Ground/Supply Sensing
Zero-Crossing Detectors
IR Receivers
Window Comparators
Digital Line Receivers
Level Translators
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.
____________________________Features
♦ 120ns Propagation Delay
♦ 48µA Quiescent Supply Current
♦ +2.5V to +5.5V Single-Supply Operation
♦ Common-Mode Input Voltage Range Extends
250mV Beyond the Rails
♦ Push-Pull Output Stage Sinks and Sources
8mA Current (MAX987/MAX991/MAX995)
♦ Open-Drain Output Voltage Extends Beyond V
(MAX988/MAX992/MAX996)
♦ Unique Output Stage Reduces Output Switching
Current, Minimizing Overall Power Consumption
♦ 100µA Supply Current at 1MHz Switching
Frequency
♦ No Phase Reversal for Overdriven Inputs
♦ Available in Space-Saving Packages:
5-Pin SOT23 (MAX987/MAX988)
8-Pin µMAX (MAX991/MAX992)
_______________Ordering Information
®
pack-
PART
MAX987EXK-T
MAX987EUK-T
OUTPUT
MAX987ESA
STAGE
Ordering Information continued at end of data sheet.
Note: All devices specified over the -40°C to +85°C operating
Push-Pull
temperature range.
Open-Drain
Typical Application Circuit appears at end of data sheet.
Push-Pull
Open-Drain
Push-Pull
TOP VIEW
Open-Drain
Applications
Pin Configurations continued at end of data sheet.
CC
PKG
TOP
PIN-PACKAGE
CODE
MARK
X5-1
5 SC70-5
ABM
U5-1
5 SOT23-5
ABZB
S8-2
8 SO
Pin Configurations
OUT
1
5
V
EE
MAX987
2
V
MAX988
CC
3
IN+
4
IN-
SOT23/SC70
1

MAX995 Summary of contents

  • Page 1

    ... The output stage’s unique design limits supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. The MAX987/MAX991/MAX995 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 ...

  • Page 2

    ... V ) ................................................... IN_-, IN_ .......................................-0. Current into Input Pins .....................................................±20mA OUT_ MAX987/MAX991/MAX995 ....................-0. MAX988/MAX992/MAX996 ..................................-0.3V to +6V OUT_ Short-Circuit Duration Continuous Power Dissipation (T = +70°C) A 5-Pin SC70 (derate 3.1mW/°C above +70°C) ...............247mW Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied ...

  • Page 3

    ... ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.5V 0V PARAMETER SYMBOL OUT Rise Time (MAX987/MAX991/ t RISE MAX995 Only) OUT Fall Time t FALL t PD- Propagation Delay t PD+ Power-Up Time t PU Note 1: All device specifications are 100% production tested at T anteed by design, not production tested. ...

  • Page 4

    High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators (V = +5V 0V +25°C, unless otherwise noted SUPPLY CURRENT PER COMPARATOR vs. TEMPERATURE 90 V > V IN+ IN ...

  • Page 5

    ... V = 2.5.V CC 160 150 140 V = 5.5.V CC 130 120 110 100 -60 -40 - 100 TEMPERATURE (°C) MAX987/MAX991/MAX995 PROPAGATION DELAY (t ) PD+ MAX987- 50mV OD IN+ OUT 100ns/div MAX987/MAX991/MAX995 SWITCHING CURRENT, OUT RISING MAX987- 50mV OD IN+ OUT I CC 200ns/div 50mV/div 2V/div 50mV/div 2V/div 2mA/div 5 ...

  • Page 6

    High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators (V = +5V 0V +25°C, unless otherwise noted SWITCHING CURRENT, OUT FALLING V OD IN+ OUT I CC 200ns/div 6 _______________________________________________________________________________________ Typical Operating Characteristics (continued) MAX987-14 ...

  • Page 7

    ... MAX995 MAX996 NAME SO/ TSSOP — OUT Comparator Output 4 V Positive Supply Voltage CC — IN+ Comparator Noninverting Input — IN- Comparator Inverting Input 11 V Negative Supply Voltage ...

  • Page 8

    ... Unfortunately, this method also slows hysteresis response time. Use the following procedure to calcu- late resistor values for the MAX987/MAX991/MAX995. 1) Select R3. Leakage current under 10nA; therefore, the current through R3 should be at least 1µA to minimize errors caused by leakage current. ...

  • Page 9

    ... THR THF MAX988/MAX992/MAX996 The MAX988/MAX992/MAX996 have ±2.5mV internal hysteresis. They have open-drain outputs and require an external pullup resistor (Figure 2). Additional hys- teresis can be generated using positive feedback, but the formulas differ slightly from those of the MAX987/MAX991/MAX995 ...

  • Page 10

    ... INB SO/µMAX/SOT23 Logic-Level Translator +5V (+3V) 0.1µF +3V (+5V PULLUP IN- 3V (5V) OUT 1 LOGIC OUT IN+ MAX988 OUTA 1 14 OUTD INA IND- INA IND+ MAX995 MAX996 INB INC+ INB INC- OUTB 7 8 OUTC SO/TSSOP ...

  • Page 11

    ... MAX988EUK-T 0.1µF MAX988ESA *R MAX991EKA-T PULLUP MAX991EUA-T MAX991ESA OUT MAX992EKA-T MAX992EUA-T MAX992ESA MAX995EUD MAX995ESD MAX996EUD MAX996ESD Note: All devices specified over the -40°C to +85°C operating temperature range. 4.0 ±0.1 2.0 ±0.05 A0 4.0 ±0 3.1mm ±0.1 NOTE: DIMENSIONS ARE IN MM. AND Bo = 2.7mm ±0 FOLLOW EIA481-1 STANDARD. ...

  • Page 12

    ... High-Speed, Micropower, Low-Voltage, SOT23, 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 go to www.maxim-ic.com/packages.) 12 ______________________________________________________________________________________ Package Information ...

  • Page 13

    ... Revision History Pages changed at Rev 2: 1–6, 8–13 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. ...