MAX987 Maxim, MAX987 Datasheet

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MAX987

Manufacturer Part Number
MAX987
Description
The MAX987/MAX988/MAX991/MAX992/MAX995/ MAX996 single/dual/quad micropower comparators feature low-voltage operation and rail-to-rail inputs and outputs
Manufacturer
Maxim
Datasheet

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µMAX is a registered trademark of Maxim Integrated Products,
Inc.
19-1266; Rev 2; 1/07
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
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.
Portable/Battery-
Powered Systems
Mobile Communications
Zero-Crossing Detectors
Window Comparators
Level Translators
________________General Description
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.
CC
MAX987
MAX988
MAX991
MAX992
MAX995
MAX996
PART
to 6V (max) above V
________________________________________________________________ Maxim Integrated Products
COMPARATORS
PER PACKAGE
High-Speed, Micropower, Low-Voltage,
EE
1
1
2
2
4
4
. These open-drain versions
Threshold Detectors/
Discriminators
Ground/Supply Sensing
IR Receivers
Digital Line Receivers
SOT23, Rail-to-Rail I/O Comparators
Selector Guide
Applications
Open-Drain
Open-Drain
Open-Drain
Push-Pull
Push-Pull
Push-Pull
OUTPUT
STAGE
®
pack-
♦ 120ns Propagation Delay
♦ 48µA Quiescent Supply Current
♦ +2.5V to +5.5V Single-Supply Operation
♦ Common-Mode Input Voltage Range Extends
♦ Push-Pull Output Stage Sinks and Sources
♦ Open-Drain Output Voltage Extends Beyond V
♦ Unique Output Stage Reduces Output Switching
♦ 100µA Supply Current at 1MHz Switching
♦ No Phase Reversal for Overdriven Inputs
♦ Available in Space-Saving Packages:
____________________________Features
_______________Ordering Information
Ordering Information continued at end of data sheet.
Typical Application Circuit appears at end of data sheet.
Note: All devices specified over the -40°C to +85°C operating
temperature range.
Pin Configurations continued at end of data sheet.
MAX987EXK-T
MAX987EUK-T
MAX987ESA
250mV Beyond the Rails
8mA Current (MAX987/MAX991/MAX995)
(MAX988/MAX992/MAX996)
Current, Minimizing Overall Power Consumption
Frequency
TOP VIEW
PART
5-Pin SOT23 (MAX987/MAX988)
8-Pin µMAX (MAX991/MAX992)
OUT
5 SC70-5
5 SOT23-5
8 SO
V
PIN-PACKAGE
IN+
CC
1
2
3
SOT23/SC70
Pin Configurations
MAX987
MAX988
5
4
CODE
PKG
X5-1
U5-1
S8-2
V
IN-
EE
MARK
ABZB
TOP
ABM
CC
1

Related parts for MAX987

MAX987 Summary of contents

Page 1

... 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 ...

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

... MAX987/MAX991/ MAX995 only 100mV overdrive C = 15pF, L MAX988/MAX992/ 10mV overdrive MAX996 only, 100mV overdrive R = 5.1kΩ PULLUP 10mV overdrive MAX987/MAX991/MAX995 only 15pF 100mV overdrive +25°C. Limits over the extended temperature range are guar +25°C.) A MIN TYP MAX ...

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

... SWITCHING CURRENT, OUT FALLING V OD IN+ OUT I CC 200ns/div 6 _______________________________________________________________________________________ Typical Operating Characteristics (continued) MAX987-14 = 50mV 50mV/div 2V/div 2mA/div POWER-UP DELAY MAX987- 50mV IN IN OUT 5µs/div 1MHZ RESPONSE MAX987-15 50mV/div IN+ OUT 2V/div V = 50mV OD 200ns/div 2V/div 2V/div ...

Page 7

... High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators ______________________________________________________________Pin Description PIN MAX987 MAX991 MAX988 MAX996 SOT23/ SO/µMAX/ SO SC70 SOT23 1 6 — — — — — 1 — — 2 — — 3 — — 5 — — 6 — — 7 — — — ...

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

... High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators Zero-Crossing Detector Figure 3 shows a zero-crossing detector application. The MAX987’s inverting input is connected to ground, and its noninverting input is connected to a 100mVp-p signal source. As the signal at the noninverting input crosses 0V, the comparator’s output changes state. ...

Page 11

High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators Typical Application Circuit IN+ IN- MAX98_ MAX99_ REF * MAX988/MAX992/MAX996 ONLY THRESHOLD DETECTOR __________________________________________________Tape-and-Reel Information 1.5 +0.1/-0.0 DIAMETER 2.2 ±0.1 0.5 RADIUS TYPICAL B ...

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. ...

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