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19-1547; Rev 0; 10/99
Low-Cost, Ultra-Small, 3µA
Single-Supply Comparators
General Description
The MAX9075/MAX9077 single/dual comparators are
optimized for +3V and +5V single-supply applications.
These comparators have a 580ns propagation delay and
consume just 3µA per comparator. The combination of
low-power, single-supply operation down to +2.1V, and
ultra-small footprint makes these devices ideal for all
portable applications.
The MAX9075/MAX9077 have a common-mode input
voltage range of -0.2V to V
CC
- 1.2V. Unlike many com-
parators, there is no differential clamp between the
inputs, allowing the differential input voltage range to
extend Rail-to-Rail
®
. All inputs and outputs tolerate a
continuous short-circuit fault condition to either rail.
The design of the output stage limits supply-current
surges while switching (typical of many other compara-
tors), minimizing power consumption under dynamic
conditions. Large internal push-pull output drivers allow
rail-to-rail output swing with loads up to 2mA, making
these devices ideal for interface with TTL/CMOS logic.
The MAX9075 single comparator is available in 5-pin
SC70 and SOT23-5 packages, while the MAX9077 dual
comparator is available in 8-pin SOT23-8 and SO
packages.
Features
o
580ns Propagation Delay from Only 3µA
o
+2.1V to +5.5V Single-Supply Operation
o
Ground-Sensing Inputs
o
Rail-to-Rail Outputs
o
No Output Phase Inversion for Overdriven Inputs
o
No Differential Clamp Across Inputs
o
Available in Ultra-Small Packages
5-Pin SC70 (MAX9075)
8-Pin SOT23 (MAX9077)
MAX9075/MAX9077
Ordering Information
PART
MAX9075EXK-T
MAX9075EUK-T
MAX9077EKA-T
MAX9077ESA
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
5 SC70-5
5 SOT23-5
8 SOT23-8
8 SO
TOP
MARK
AAC
ADLX
AAAD
—
Applications
Battery-Powered Systems
Threshold Detectors/Discriminators
Keyless Entry Systems
IR Receivers
Digital Line Receivers
Typical Operating Circuit
V
CC
Pin Configurations
TOP VIEW
V
IN
V
CC
OUT
1
5
V
CC
IN+
MAX9075
MAX9077
OUT
GND
2
MAX9075
IN-
IN+
3
4
IN-
V
REF
GND
SC70-5/SOT23-5
Pin Configurations continued at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Low-Cost, Ultra-Small, 3µA
Single-Supply Comparators
MAX9075/MAX9077
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
V
CC
to GND .....................................................................+6V
All Other Pins to GND...........................-0.3V to (V
CC
+ 0.3V)
Duration of Output Short Circuit to GND or V
CC
........Continuous
Continuous Power Dissipation (T
A
= +70°C)
5-Pin SC70 (derate 2.5mW/°C above +70°C) ............200mW
5-Pin SOT23 (derate 7.1mW/°C above +70°C)..........571mW
8-Pin SOT23 (derate 5.3mW/°C above +70°C)..........421mW
8-Pin SO (derate 5.88mW/°C above +70°C)..............471mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
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.
ELECTRICAL CHARACTERISTICS
(V
CC
= +5V, V
CM
= -0.2V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Operating Supply Voltage Range
Supply Current per Comparator
Power-Supply Rejection Ratio
Common-Mode Voltage Range
Input Offset Voltage
Input Offset Current
Input Bias Current
Input Capacitance
Common-Mode Rejection Ratio
OUT_ Output Voltage High
OUT_ Output Voltage Low
Propagation Delay Low to High
Propagation Delay High to Low
Rise/Fall Time
SYMBOL
V
CC
I
CC
PSRR
V
CMR
V
OS
I
OS
I
B
C
IN
CMRR
V
OH
V
OL
t
PD+
t
PD-
-0.2V
≤
V
CM
≤
(V
CC
- 1.2V)
I
SOURCE
= 2mA
I
SINK
= 2mA
C
LOAD
= 10pF, overdrive = 100mV
C
LOAD
= 10pF, overdrive = 100mV
C
LOAD
= 10pF
580
250
1.6
60
V
CC
-
0.4
0.4
V
CM
= 0 (Note 3)
CONDITIONS
Inferred from PSRR
V
CC
= 5V
V
CC
= 5V
V
CC
= 3V
2.1V
≤
V
CC
≤
5.5V
(Note 2)
54
-0.2
±1
1
-5
3
82
-20
T
A
= +25°C
T
A
= T
MIN
to T
MAX
2.4
77
V
CC
-
1.2
±8
dB
V
mV
nA
nA
pF
dB
V
V
ns
ns
ns
MIN
2.1
3
TYP
MAX
5.5
5.2
6.6
µA
UNITS
V
Note 1:
All devices are 100% production tested at T
A
= +25°C. All temperature limits are guaranteed by design.
Note 2:
Inferred from CMRR. Either input can be driven to the absolute maximum limit without output inversion, as long as the other
input is within the input voltage range.
Note 3:
Guaranteed by design.
2
_______________________________________________________________________________________
Low-Cost, Ultra-Small, 3µA
Single-Supply Comparators
Typical Operating Characteristics
(V
CC
= +5V, V
CM
= 0, 100mV overdrive, T
A
= +25°C, unless otherwise noted.)
MAX9075/MAX9077
OUTPUT VOLTAGE LOW vs.
SINK CURRENT (V
CC
= 2.1V)
MAX9075/7 toc01
OUTPUT VOLTAGE LOW vs.
SINK CURRENT (V
CC
= 3V)
MAX9075/7 toc02
OUTPUT VOLTAGE LOW vs.
SINK CURRENT (V
CC
= 5V)
MAX9075/7 toc03
3.0
2.5
OUTPUT VOLTAGE (V)
2.0
T
A
= +25°C
1.5
1.0
0.5
0
0
5
10
SINK CURRENT (mA)
15
T
A
= +85°C
T
A
= -40°C
4.0
3.5
OUTPUT VOLTAGE (V)
3.0
2.5
2.0
1.5
1.0
0.5
0
0
5
10
15
20
25
30
35
T
A
= +25°C
7
6
OUTPUT VOLTAGE (V)
5
4
3
T
A
= +85°C
2
T
A
= -40°C
1
0
T
A
= +25°C
T
A
= +85°C
T
A
= -40°C
20
40
0
10
20
SINK CURRENT (mA)
30 40 50 60 70
SINK CURRENT (mA)
80
90
OUTPUT VOLTAGE HIGH vs.
SOURCE CURRENT (V
CC
= 2.1V)
MAX9075/7 toc04
OUTPUT VOLTAGE HIGH vs.
SOURCE CURRENT (V
CC
= 3V)
MAX9075/7 toc05
OUTPUT VOLTAGE HIGH vs.
SOURCE CURRENT (V
CC
= 5V)
5
T
A
= -40°C
OUTPUT VOLTAGE (V)
4
3
2
1
0
-1
T
A
= +85°C
T
A
= +25°C
MAX9075/7 toc06
2.5
2.0
OUTPUT VOLTAGE (V)
1.5
T
A
= +85°C
1.0
T
A
= +25°C
0.5
0
-0.5
0
2
4
12 14
SOURCE CURRENT (mA)
6
8
10
16
3.5
3.0
OUTPUT VOLTAGE (V)
2.5
2.0
1.5
1.0
0.5
0
-0.5
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
6
T
A
= -40°C
18
0
5
10
30 35
SOURCE CURRENT (mA)
15
20
25
40
45
0
10 20 30 40 50 60 70 80 90 100
SOURCE CURRENT (mA)
SHORT-CIRCUIT SINK CURRENT
vs. TEMPERATURE
MAX9075 toc07
SHORT-CIRCUIT SOURCE CURRENT
vs. TEMPERATURE
MAX9075 toc08
SUPPLY CURRENT vs.
TEMPERATURE (OUT = HIGH)
4.0
SUPPLY CURRENT (µA)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
V
CC
= 3V
V
CC
= 2.1V
V
CC
= 5V
MAX9075 toc09
90
80
70
SINK CURRENT (mA)
60
50
40
30
20
10
0
-55
-35
-15
5
25
45
65
V
CC
= 3V
V
CC
= 2.1V
V
CC
= 5V
100
90
80
SOURCE CURRENT (mA)
70
60
50
40
30
20
10
0
V
CC
= 2.1V
V
CC
= 3V
V
CC
= 5V
4.5
85
-55
-35
-15
5
25
45
65
85
0
-55
-35
-15
5
25
45
65
85
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
3
Low-Cost, Ultra-Small, 3µA
Single-Supply Comparators
MAX9075/MAX9077
Typical Operating Characteristics (continued)
(V
CC
= +5V, V
CM
= 0, 100mV overdrive, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT vs.
TEMPERATURE (OUT = LOW)
MAX9075 toc10
SUPPLY CURRENT vs.
OUTPUT TRANSITION FREQUENCY
MAX9075 toc11
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
-0.1
OFFSET VOLTAGE (mV)
-0.2
-0.3
-0.4
-0.5
-0.6
V
CC
= 5V
V
CC
= 3V
V
CC
= 2.1V
MAX9075 toc12
4.0
3.5
SUPPLY CURRENT (µA)
3.0
2.5
2.0
1.5
1.0
0.5
0
-55
-35
-15
5
25
45
65
V
CC
= 2.1V
V
CC
= 5V
V
CC
= 3V
1000
0
SUPPLY CURRENT (µA)
100
V
CC
= 5V
V
CC
= 3V
10
V
CC
= 2.1V
1
85
1
10
100
1k
10k
100k
1M
TEMPERATURE (°C)
TRANSITION FREQUENCY (Hz)
-0.7
-0.8
-55
-35
-15
5
25
45
65
85
TEMPERATURE (°C)
PROPAGATION DELAY
vs. LOAD CAPACITANCE
MAX9075 toc13
PROPAGATION DELAY
vs. INPUT OVERDRIVE (t
PD+
)
MAX9075 toc14
PROPAGATION DELAY
vs. INPUT OVERDRIVE (t
PD-
)
0.6
PROPAGATION DELAY (µs)
0.5
0.4
0.3
0.2
0.1
0
V
CC
= 2.1V
V
CC
= 3V
V
CC
= 5V
MAX9075 toc15
0.7
t
PD+
0.6
PROPAGATION DELAY (µs)
0.5
0.4
0.3
0.2
0.1
0
0
500
1000
1500
LOAD CAPACITANCE (pF)
t
PD-
1.6
1.4
PROPAGATION DELAY (µs)
1.2
1.0
0.8
0.6
0.4
0.2
0
0
50
100
150
200
V
CC
= 5V
V
CC
= 3V
V
CC
= 2.1V
0.7
2000
250
0
50
100
150
200
250
INPUT OVERDRIVE (mV)
INPUT OVERDRIVE (mV)
PROPAGATION DELAY
vs. TEMPERATURE (V
CC
= 2.1V)
MAX9075 toc16
PROPAGATION DELAY
vs. TEMPERATURE (V
CC
= 3V)
MAX9075 toc17
PROPAGATION DELAY
vs. TEMPERATURE (V
CC
= 5V)
700
PROPAGATION DELAY (ns)
600
500
400
300
200
100
0
t
PD-
t
PD+
MAX9075 toc18
500
450
PROPAGATION DELAY (ns)
400
350
300
250
200
150
100
50
0
-55
-35
-15
5
25
45
65
t
PD-
t
PD+
600
500
PROPAGATION DELAY (ns)
400
300
200
100
0
t
PD-
t
PD+
800
85
-55
-35
-15
5
25
45
65
85
-55
-35
-15
5
25
45
65
85
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
4
_______________________________________________________________________________________
Low-Cost, Ultra-Small, 3µA
Single-Supply Comparators
Typical Operating Characteristics (continued)
(V
CC
= +5V, V
CM
= 0, 100mV overdrive, T
A
= +25°C, unless otherwise noted.)
MAX9075/MAX9077
PROPAGATION DELAY (t
PD+
)
MAX9075/7 toc19
PROPAGATION DELAY (t
PD-
)
MAX9075/7 toc20
V
CC
= 5V
50mV/div
V
CC
= 5V
V
IN
V
IN
50mV/div
V
OUT
2V/div
2V/div
V
OUT
100ns/div
100ns//div
PROPAGATION DELAY (t
PD+
)
MAX9075/7 toc22
PROPAGATION DELAY (t
PD-
)
MAX9075/7 toc23
V
CC
= 3V
V
IN
50mV/div
50mV/div
V
CC
= 3V
V
IN
1V/div
V
OUT
1V/div
V
OUT
100ns/div
100ns/div
TRIANGLE WAVE
MAX9075/7 toc21
INPUT BIAS CURRENT
vs. TEMPERATURE
V
CC
= 3V
6
INPUT BIAS CURRENT (nA)
V
CC
= 5V
V
CC
= 3V
V
CC
= 2.1V
MAX9075 toc24
7
50mV/div
5
4
3
2
1
0
V
IN
1V/div
V
OUT
200µs/div
-55
-35
-15
5
25
45
65
85
TEMPERATURE (°C)
_______________________________________________________________________________________
5

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