________________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 sys-
tems. These comparators also operate with 1.25V to
2.75V dual supplies. They consume only 48A per
comparator while achieving a 120ns 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
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
CC
to 6V (max) above V
EE
. These open-drain versions
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 packages.
____________________________Features
o 120ns Propagation Delay
o 48A Quiescent Supply Current
o +2.5V to +5.5V Single-Supply Operation
o Common-Mode Input Voltage Range Extends
250mV Beyond the Rails
o Push/Pull Output Stage Sinks and Sources
8mA Current (MAX987/MAX991/MAX995)
o Open-Drain Output Voltage Extends Beyond V
CC
(MAX988/MAX992/MAX996)
o Unique Output Stage Reduces Output Switching
Current, Minimizing Overall Power Consumption
o 100A Supply Current at 1MHz Switching
Frequency
o No Phase Reversal for Overdriven Inputs
o Available in Space-Saving Packages:
5-Pin SOT23 (MAX987/MAX988)
8-Pin
MAX (MAX991/MAX992)
MAX987/MAX988/MAX991/MAX992/MAX995/MAX996
High-Speed, Micropower, Low-Voltage,
SOT23, Rail-to-Rail I/O Comparators
________________________________________________________________ Maxim Integrated Products
1
V
CC
IN-
IN+
1
5
V
EE
OUT
MAX987
MAX988
SOT23/SC70
TOP VIEW
2
3
4
Pin Configurations
19-1266; Rev 1; 1/01
_______________Ordering Information
Ordering Information continued at end of data sheet.
Typical Application Circuit appears at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
Pin Configurations continued at end of data sheet.
Portable/Battery-
Powered Systems
Mobile Communications
Zero-Crossing Detectors
Window Comparators
Level Translators
Threshold Detectors/
Discriminators
Ground/Supply Sensing
IR Receivers
Digital Line Receivers
Selector Guide
Applications
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
PART
TEMP. RANGE
PIN-
PACKAGE
TOP
MARK
MAX987EXK-T
-40C to +85C
5 SC70-5
ABM
MAX987EUK-T
-40C to +85C
5 SOT23-5
ABZB
MAX987ESA
-40C to +85C
8 SO
--
PART
COMPARATORS
PER PACKAGE
OUTPUT
STAGE
MAX987
1
Push/Pull
MAX988
1
Open-Drain
MAX991
2
Push/Pull
MAX992
2
Open-Drain
MAX995
4
Push/Pull
MAX996
4
Open-Drain
MAX987/MAX988/MAX991/MAX992/MAX995/MAX996
High-Speed, Micropower, Low-Voltage,
SOT23, Rail-to-Rail I/O Comparators
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS (Note 1)
(V
CC
= +2.7V to +5.5V, V
EE
= 0V, V
CM
= 0V, T
A
= -40C to +85C, unless otherwise noted. Typical values are at T
A
= +25C.)
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. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage (V
CC
to V
EE
) ...................................................6V
IN_-, IN_+ to V
EE
.......................................-0.3V to (V
CC
+ 0.3V)
OUT_ to V
EE
MAX987/MAX991/MAX995 ....................-0.3V to (V
CC
+ 0.3V)
MAX988/MAX992/MAX996.....................................-0.3V to 6V
OUT_ Short-Circuit Duration to V
EE
or V
CC
...........................10s
Continuous Power Dissipation (T
A
= +70C)
5-Pin SC70 (derate 3.1mW/C above +70C) ...............247mW
5-Pin SOT23 (derate 7.10mW/C above +70C)...........571mW
8-Pin SOT23 (derate 9.1mW/C above +70C).............727mW
8-Pin SO (derate 5.88mW/C above +70C).................471mW
8-Pin MAX (derate 4.5mW/C above +70C) ..............362mW
14-Pin TSSOP (derate 9.1mW/C above +70C) ..........727mW
14-Pin SO (derate 8.33mW/C above +70C)...............667mW
Operating Temperature Range ...........................-40C to +85C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10s) .................................+300C
Inferred from PSRR test
CONDITIONS
V
2.5
5.5
V
CC
Supply Voltage
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
53
80
2.5V
V
CC
5.5V
dB
55
80
PSRR
Power-Supply Rejection Ratio
V
CC
= 5V
96
mV
0.5
5
T
A
= +25C
V
EE
-
V
CC
+
0.25
0.25
2.5
V
HYST
Input Hysteresis
Full common-mode
range
nA
I
B
Input Bias Current
(Note 4)
0.001
10
pF
1.0
C
IN
Input Capacitance
dB
50
80
CMRR
Common-Mode Rejection Ratio
pA
0.5
I
OS
Input Offset Current
7
V
OS
Input Offset Voltage
(Note 3)
V
OUT
= high
A
1.0
I
LEAK
Output Leakage Current
(MAX988/MAX992/
MAX996 only)
35
95
T
A
= +25C
T
A
= -40C to +85C
48
80
V
CC
= 2.7V
A
96
I
CC
Supply Current per
Comparator
T
A
= +25C
T
A
= -40C to +85C
Sourcing or sinking,
V
OUT
= V
EE
or V
CC
I
SC
Output Short-Circuit Current
T
A
= +25C
T
A
= -40C to +85C
T
A
= -40C to +85C
V
EE
V
CC
V
V
CMR
Common-Mode Voltage
Range (Note 2)
mV
V
CC
= 5V
V
CC
= 2.7V
mA
V
CC
= 5V,
I
SINK
= 8mA
0.55
0.2
0.4
V
OL
OUT Output Voltage Low
V
CC
= 2.7V,
I
SINK
= 3.5mA
V
0.4
0.15
0.3
T
A
= +25C
T
A
= -40C to +85C
T
A
= +25C
T
A
= -40C to +85C
T
A
= +25C
V
CC
= 5V,
I
SOURCE
= 8mA
T
A
= -40C to +85C
4.45
4.6
4.85
V
OH
T
A
= +25C
OUT Output Voltage High
(MAX987/MAX991/
MAX995 only)
V
CC
= 2.7V,
I
SOURCE
= 3.5mA
T
A
= -40C to +85C
V
2.3
2.4
2.55
MAX987/MAX988/MAX991/MAX992/MAX995/MAX996
High-Speed, Micropower, Low-Voltage,
SOT23, Rail-to-Rail I/O Comparators
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.7V to +5.5V, V
EE
= 0V, V
CM
= 0V, T
A
= -40C to +85C, unless otherwise noted. Typical values are at T
A
= +25C.)
CONDITIONS
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
V
CC
= 5.0V
ns
40
t
RISE
OUT Rise Time
(MAX987/MAX991/
MAX995 only)
20
15
s
25
t
PU
Power-Up Time
ns
V
CC
= 5.0V
40
t
FALL
OUT Fall Time
20
15
120
210
100mV overdrive
100mV overdrive
C
L
= 15pF,
V
CC
= 5V
120
t
PD+
Propagation Delay
210
ns
210
t
PD-
120
MAX987/MAX991/
MAX995 only
10mV overdrive
100mV overdrive
MAX987/MAX991/MAX995
only, C
L
= 15pF, V
CC
= 5V
10mV overdrive
10mV overdrive
C
L
= 15pF
C
L
= 50pF
C
L
= 200pF
C
L
= 15pF
C
L
= 50pF
C
L
= 200pF
MAX988/MAX992/
MAX996 only,
R
PULL-UP
= 5.1k
Note 1: All device specifications are 100% production tested at T
A
= +25C. Limits over the extended temperature range are guar-
anteed by design, not production tested.
Note 2: Inferred from the V
OS
test. Either or both inputs can be driven 0.3V beyond either supply rail without output phase reversal.
Note 3: V
OS
is defined as the center of the hysteresis band at the input.
Note 4: I
B
is defined as the average of the two input bias currents (I
B-
, I
B+
).
Typical Operating Characteristics
(V
CC
= +5V, V
CM
= 0, T
A
= +25C, unless otherwise noted.)
30
40
50
60
70
80
90
-60
-20
-40
0
20
40
60
80
100
SUPPLY CURRENT PER COMPARATOR
vs. TEMPERATURE
MAX9879 TOC1
TEMPERATURE (C)
SUPPLY CURRENT (
A)
V
CC
= 5.5.V
V
CC
= 2.5.V
V
IN+
> V
IN-
1000
10
0.01
0.1
1
10
100
1000 10,000
SUPPLY CURRENT PER COMPARATOR
vs. OUTPUT TRANSITION FREQUENCY
MAX987 TOC2
OUTPUT TRANSITION FREQUENCY (kHz)
SUPPLY CURRENT (
A)
100
V
CC
= 2.5V
V
CC
= 5.5V
MAX987/MAX988/MAX991/MAX992/MAX995/MAX996
High-Speed, Micropower, Low-Voltage,
SOT23, Rail-to-Rail I/O Comparators
4
_______________________________________________________________________________________
10,000
1
0.01
0.1
1
10
100
OUTPUT LOW VOLTAGE
vs. OUTPUT SINK CURRENT
MAX987-03a
OUTPUT SINK CURRENT (mA)
OUTPUT LOW VOLTAGE (mV) (V
OL
)
10
100
1000
V
IN+
< V
IN-
V
CC
= 2.7V
V
CC
= 5.0V
120
0
-60
100
OUTPUT SHORT-CIRCUIT
CURRENT vs. TEMPERATURE
20
10
90
80
110
100
MAX987 05
TEMPERATURE (C)
OUTPUT SINK CURRENT (mA)
-40
-20
0
20
40
60
80
70
60
50
40
30
V
CC
= 5.0V
V
CC
= 2.7V
1.1
-0.3
-60
100
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
-0.1
0.7
0.9
MAX987 06
TEMPERATURE (C)
OFFSET VOLTAGE (mV)
-40
-20
0
20
40
60
80
0.5
0.3
0.1
10,000
0.1
0.01
0.1
1
10
100
OUTPUT HIGH VOLTAGE
vs. OUTPUT SOURCE CURRENT
1
MAX987-04
OUTPUT SOURCE CURRENT (mA)
OUTPUT HIGH VOLTAGE
(mV) (V
CC
- V
OH
)
10
100
1000
V
IN+
> V
IN-
V
CC
= 5.0V
V
CC
= 2.7V
MAX987/MAX988/MAX991/MAX992/MAX995/MAX996
High-Speed, Micropower, Low-Voltage,
SOT23, Rail-to-Rail I/O Comparators
_______________________________________________________________________________________
5
Typical Operating Characteristics
(V
CC
= +5V, V
CM
= 0, T
A
= +25C, unless otherwise noted.)
100
110
130
150
170
190
120
140
160
180
200
-60
-20
-40
0
20
40
60
80
100
PROPAGATION DELAY
vs. TEMPERATURE
MAX987 TOC9
TEMPERATURE (C)
PROPAGATION DELAY (ns)
V
CC
= 5.5.V
V
CC
= 2.5.V
V
OD
= 50mV
1000
10,000
100
0.01
0.1
10
1
100
1000
PROPAGATION DELAY
vs. CAPACITIVE LOAD
MAX987 TOC8
CAPACITIVE LOAD (nF)
PROPAGATION DELAY (ns)
V
OD
= 50mV
300
0
0
60
120
20
80
40
100
140
PROPAGATION DELAY
vs. INPUT OVERDRIVE
100
50
250
200
150
MAX987 TOC10
INPUT OVERDRIVE (mV)
PROPAGATION DELAY (ns)
V
CC
= 2.5V
V
CC
= 5.5V
PROPAGATION DELAY (t
PD-
)
IN+
OUT
MAX987-12
100ns/div
50mV/
div
2V/div
V
OD
= 50mV
MAX987/MAX991/MAX995
PROPAGATION DELAY (t
PD+
)
IN+
OUT
MAX987-11
100ns/div
50mV/
div
2V/div
V
OD
= 50mV
MAX987/MAX991/MAX995
SWITCHING CURRENT, OUT RISING
IN+
OUT
I
CC
MAX987-13
200ns/div
50mV/
div
2V/div
2mA/div
V
OD
= 50mV
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