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MAX965–MAX970
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
General Description
The MAX965–MAX970 single/dual/quad micropower
comparators feature rail-to-rail inputs and outputs, and
fully specified single-supply operation down to +1.6V.
These devices draw less than 5µA per comparator and
have open-drain outputs that can be pulled beyond VCC
to 6V (max) above ground. In addition, their rail-to-rail
input common-mode voltage range makes these
comparators suitable for ultra-low-voltage operation.
A +1.6V to +5.5V single-supply operating voltage range
makes the MAX965 family of comparators ideal for 2-cell
battery-powered applications. The MAX965/MAX967/
MAX968/MAX969 offer programmable hysteresis and an
internal 1.235V ±1.5% reference. All devices are available
in either space-saving 8-pin µMAX® or 16-pin QSOP
packages.
Applications
●●
●●
●●
●●
●●
●●
2-Cell Battery-Powered/Portable Systems
Window Comparators
Threshold Detectors/Discriminators
Mobile Communications
Voltage-Level Translation
Ground/Supply-Sensing Applications
Features
●● Ultra-Low Single-Supply Operation down to +1.6V
●● Rail-to-Rail Common-Mode Input Voltage Range
●● 3µA Quiescent Supply Current per Comparator
●● Open-Drain Outputs Swing Beyond VCC
●● 1.235V ±1.5% Precision Internal Reference
(MAX965/967/968/969)
●● 10µs Propagation Delay (50mV overdrive)
●● Available in Space-Saving Packages:
• 8-Pin µMAX (MAX965–MAX968)
• 16-Pin QSOP (MAX969/MAX970)
Ordering Information
TEMP RANGE
PINPACKAGE
MAX965ESA
-40°C to +85°C
8 SO
S8-2
MAX965EUA-T
-40°C to +85°C
8 µMAX-8
U8-1
PART
PKG
CODE
MAX966ESA
-40°C to +85°C
8 SO
S8-2
MAX966EUA-T
-40°C to +85°C
8 µMAX-8
U8-1
MAX967ESA
-40°C to +85°C
8 SO
S8-2
MAX967EUA-T
-40°C to +85°C
8 µMAX-8
U8-1
Ordering Information continued on last page.
Selector Guide
Typical Operating Circuit
COMPARATORS
PROGRAMMABLE
PER
HYSTERESIS
PACKAGE
VIN
PART
INTERNAL
REFERENCE
MAX965
Yes
1
Yes
MAX966
No
2
No
MAX967
Yes
2
Yes
MAX968
Yes
2
Yes
4 IN-
MAX969
Yes
4
Yes
5 HYST
MAX970
No
4
No
6 REF
VCC
7
VCC
3 IN+
RPULL-UP
OUT
8
VOUT
MAX965
1.235V
GND
1
µMAX is a registered trademark of Maxim Integrated Products,
Inc.
19-1226; Rev 4; 7/19
Pin Configurations appear at end of data sheet.
MAX965–MAX970
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
Absolute Maximum Ratings
8-Pin µMAX (derate 4.10mW/°C above +70°C)...........330mW
14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW
16-Pin SO (derate 8.70mW/°C above +70°C)..............696mW
16-Pin QSOP (derate 5.70mW/°C above +70°C)........457mW
Operating Temperature Range............................ -40°C to +85°C
Storage Temperature Range............................. -65°C to +150°C
Lead Temperature (soldering, 10s).................................. +300°C
Supply Voltage (VCC).............................................................+6V
Voltages
IN_-, IN_+, REF, HYST.......................... -0.3V to (VCC + 0.3V)
OUT_ ................................................................-0.3V to +6.0V
Current into Input Pins......................................................±20mA
Duration of OUT_ Short Circuit to GND or VCC.........Continuous
Continuous Power Dissipation
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
(VCC = +1.6V to +5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 3V and TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
POWER SUPPLIES
Supply Voltage Range
VCC
All packages, TA = 0°C to +85°C
SO/QSOP packages, TA = -40°C to +85°C
µMAX package, TA = -40°C to +85°C
1.6
5.5
1.7
5.5
1.8
5.5
Comparator Minimum
Operating Voltage
Supply Current
1.0
ICC
Power-Up Time
(VCC to output valid)
V
V
MAX965
7.0
12
MAX966
6.0
10
MAX967/MAX968
10
16
MAX969
14
22
MAX970
11
18
VCC stepped 0V to 5V
20
µA
µs
COMPARATOR
Power-Supply Rejection Ratio
Common-Mode Voltage Range
Input Offset Voltage
PSRR
VCMR
VOS
1.7V ≤ VCC ≤ 5.5V
Full commonmode range
Input Hysteresis
Input Bias Current
VHYST
IB
Input Offset Current
IOS
Input Capacitance
CIN
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0.1
TA = +25°C
TA = -40°C to +85°C
SO package
Common-mode QSOP package
range = -0.25V to
0°C to +85°C
1.3V, VCC > 1.8V µMAX
package -40°C to +85°C
-0.25
-0.25
1.0
VCC
VCC - 0.25
3.0
4.0
6.0
7.0
QSOP package
10.0
0°C to +85°C
Common-mode range = -0.25V to (VCC - 0.25V)
Full common-mode range, TA = +25°C
mV
10.0
-40°C to +85°C
HYST = REF
V
V
4.0
SO package
µMAX
package
mV/V
15.0
±1
mV
0.001
±5
0.001
±50
nA
0.2
pA
7.0
pF
Maxim Integrated │ 2
MAX965–MAX970
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
Electrical Characteristics (continued)
(VCC = +1.6V to +5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 3V and TA = +25°C.)
PARAMETER
SYMBOL
Common-Mode Rejection Ratio
CMRR
CONDITIONS
MIN
TYP
MAX
UNITS
1.5
4.0
mV/V
VREF
V
VREF0.05
HYST Input Voltage Range
IHYST
HYST Input Leakage
±10
Hysteresis Gain
nA
1.0
Input Voltage Noise
f = 100Hz to 100kHz, CREF = 1000pF
en
VOL
OUT Output Voltage Low
ILEAK
OUT Output Leakage Current
tPD-
Propagation Delay
V/V
µVRMS
10
IOUT = 100µA, 1.6V < VCC < 2.7V
0.2
IOUT = 500µA, 2.7V < VCC < 5.5V
VCC = 5.5V, VOUT = 5.5V
1
VCC = 1.6V, VOUT = 1.6V
RPULLUP = 1MΩ,
CLOAD = 15pF, high to low
V
0.4
100
10mV overdrive
20
50mV overdrive
10
nA
µs
REFERENCE
Reference Voltage
VREF
Source Current
IREF+
Sink Current
IREF-
SO package
QSOP package
µMAX package, TA = 0°C to +85°C
µMAX package, TA = -40°C to +85°C
HYST = REF
1.125
1.205
1.205
1.185
15
1.235
1.235
1.235
1.235
50
200
400
f = 100Hz to 100kHz, CREF = 0.1µF
Output Voltage Noise
1.255
1.265
1.265
1.285
V
µA
nA
µVRMS
10
Typical Operating Characteristics
(VCC = +3.0V, RPULLUP = 100kΩ, VCM = 0V, TA = +25°C, unless otherwise noted.)
MAX966 SUPPLY CURRENT
vs. TEMPERATURE
8
VCC = 3.0V
7
6
5
-40
-20
0
7.0
VCC = 5.0V
6.5
6.0
VCC = 3.0V
5.5
20
40
TEMPERATURE (°C)
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60
80
-60
-40
-20
0
20
13
12
VCC = 5.0V
11
10
VCC = 3.0V
9
8
VCC = 2.0V
6
VIN+ > VIN-
4.0
100
14
7
VCC = 2.0V
4.5
VIN+ > VIN-
3
-60
7.5
5.0
VCC = 2.0V
4
8.0
SUPPLY CURRENT (µA)
9
15
MAX965-TOC2b
VCC = 5.0V
10
8.5
SUPPLY CURRENT (µA)
SUPPLY CURRENT (µA)
12
11
9.0
MAX965-TOC1b
13
MAX967/MAX968 SUPPLY CURRENT
vs. TEMPERATURE
MAX965-TOC3b
MAX965 SUPPLY CURRENT
vs. TEMPERATURE
40
TEMPERATURE (°C)
60
80
VIN+ > VIN-
5
100
-60
-40
-20
0
20
40
60
80
100
TEMPERATURE (°C)
Maxim Integrated │ 3
MAX965–MAX970
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
Typical Operating Characteristics (continued)
(VCC = +3.0V, RPULLUP = 100kΩ, VCM = 0V, TA = +25°C, unless otherwise noted.)
VCC = 5.0V
VCC = 3.0V
-20
0
40
60
80
VIN+ > VIN-
7
-60
100
-40
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
12
10
8
6
4
VIN+ > VIN1
0
2
3
4
5
OUTPUT SHORT-CIRCUIT SINK CURRENT (mA)
MAX965/70-TOC7a
14
0
6
14
VCC = 2.0V
8
7
6
4
VCC = 5V
10
8
6
VCC = 3V
4
VCC = 2V
2
0
VOD = 50mV
-40
-20
0
20
40
TEMPERATURE (°C)
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0.5
VIN+ > VIN-
0
0
1
2
-60
60
80
100
4
5
6
COMPARATOR OUTPUT
LOW VOLTAGE vs. SINK CURRENT
5.0
VIN+ = < VIN-
4.5
-40
-20
0
20
40
60
80
4.0
3.5
3.0
2.5
VCC = 2V VCC = 3V
2.0
1.5
VCC = 5V
1.0
0
100
0
2
4
VOD = 50mV
6
8
10
12
SINK CURRENT (mA)
PROPAGATION DELAY (tPD-)
vs. INPUT OVERDRIVE
PROPAGATION DELAY (tPD-)
vs. CAPACITIVE LOAD
30
25
20
VCC = 2.0V
40
30
0
3
0.5
VCC = 3.0V
15
VCC = 2.0V
10
VCC = 5.0V
0.001
0.01
CAPACITIVE LOAD (µF)
VCC = 3.0V
VCC = 5.0V
5
10
-60
1.0
100
20
5
1.5
SUPPLY VOLTAGE (V)
12
60
DELAY (µs)
DELAY (µs)
VCC = 5.0V
9
80
50
VCC = 3.0V
10
60
VIN+ < VIN-
70
MAX965-TOC10a
13
11
40
2.0
TEMPERATURE (°C)
PROPAGATION DELAY (tPD-)
vs. TEMPERATURE
12
20
COMPARATOR OUTPUT SHORT-CIRCUIT
SINK CURRENT vs. TEMPERATURE
SUPPLY VOLTAGE (V)
14
0
2.5
TEMPERATURE (°C)
MAX965 SUPPLY CURRENT
vs. SUPPLY VOLTAGE
(INCLUDES REFERENCE CURRENT)
2
-20
MAX965-TOC6b
MAX965-TOC5b
VCC = 2.0V
9
8
VIN+ > VIN20
VCC = 3.0V
10
3.0
MAX965-TOC12a
-40
11
OUTPUT LOW VOLTAGE (V)
-60
12
DELAY (µs)
8
VCC = 5.0V
MAX965/70 -TOC8a
VCC = 2.0V
13
MAX4108/9-11a
10
14
3.5
MAX965/70-09a
16
12
15
SUPPLY CURRENT (µA)
18
SUPPLY CURRENT (µA)
16
MAX965-TOC4b
20
14
SUPPLY CURRENT PER COMPARATOR
vs. SUPPLY VOLTAGE
(EXCLUDES REFERENCE CURRENT)
MAX970 SUPPLY CURRENT
vs. TEMPERATURE
SUPPLY CURRENT PER COMPARATOR (µA)
MAX969 SUPPLY CURRENT
vs. TEMPERATURE
0
0.1
0
20
40
60
80 100
120 140 160
INPUT OVERDRIVE (mV)
Maxim Integrated │ 4
MAX965–MAX970
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
Typical Operating Characteristics (continued)
3.2
3.0
VCC = 5.5V
2.8
2.6
VCC = 1.6V
2.4
170
160
150
140
130
120
1
10
100
100
-60
-40
-20
OUTPUT TRANSITION FREQUENCY (kHz)
MAX965/70 TOC16
30
25
20
15
10
VCC = 5.0V
VHYST = 22mV (PROGRAMMED)
5
0
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
40
60
80
2.0
1.5
1.0
VCC = 3.0V
0
100
-40
VCC = 5V
1.2340
1.2335
1.2330
VCC = 2V
1.2325
1.2320
-60
-40
-20
0
20
40
60
80
REFERENCE VOLTAGE
vs. SOURCE CURRENT
PROPAGATION DELAY (tPD+)
MAX965/70-TOC18a
1.1
20
40
60
80
100
5.0
5.8
REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
1.239
1.237
1.235
1.233
1.231
1.229
1.227
100
1.223
1
1.8
2.6
3.4
4.2
VCC (V)
PROPAGATION DELAY (tPD-)
MAX965/70-TOC15
1.2
0
1.225
VCC = 3V
TEMPERATURE (°C)
1.3
-20
TEMPERATURE (°C)
COMMON-MODE VOLTAGE (V)
1.4
REFERENCE VOLTAGE (V)
20
REFERENCE VOLTAGE
vs. TEMPERATURE
1.2345
REFERENCE VOLTAGE (V)
PROGRAMMED HYSTERESIS (mV)
35
2.5
TEMPERATURE (°C)
PROGRAMMED HYSTERESIS
vs. COMMON-MODE VOLTAGE
40
0
MAX965/70 TOC6a
0.1
3.0
0.5
REFENCE VOLTAGE (V)
0.01
VCC = 5.0V
3.5
110
2.2
2.0
180
4.0
MAX965/70-TOC15a
3.4
190
INPUT BIAS CURRENT
vs. TEMPERATURE
MAX965/70-TOC13
3.6
200
INPUT BIAS CURRENT (pA)
3.8
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
MAX965/70-TOC14a
MAX965/70 TOC13A
4.0
SUPPLY CURRENT PER COMPARATOR
vs. OUTPUT TRANSITION FREQUENCY
INPUT OFFSET VOLTAGE (µV)
SUPPLY CURRENT PER COMPARATOR (µA)
(VCC = +3.0V, RPULLUP = 100kΩ, VCM = 0V, TA = +25°C, unless otherwise noted.)
MAX965/70-TOC16b
VCC = 3V
VCC = 3V
IN+
50mV/div
IN+
50mV/div
1.0
0.9
0.8
0.7
0.6
OUT
2V/div
OUT
2V/div
0
100
200
300
400
500
600
700
2µs/div
2µs/div
SOURCE CURRENT (µA)
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Maxim Integrated │ 5
MAX965–MAX970
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
Typical Operating Characteristics (continued)
(VCC = +3.0V, RPULLUP = 100kΩ, VCM = 0V, TA = +25°C, unless otherwise noted.)
10kHz RESPONSE
POWER-UP/DOWN RESPONSE
MAX965/70-TOC17
MAX965/70-TOC18
IN+
50mV/div
VCC
2V/div
OUT
1V/div
OUT
2V/div
5µs/div
20µs/div
Pin Descriptions
MAX965–MAX968
PIN
NAME
FUNCTION
MAX965
MAX966
MAX967
MAX968
—
1
1
1
OUTA
Comparator A Open-Drain Output
1
2
2
2
GND
Ground
2
—
—
—
N.C.
No Connection. Not internally connected.
3
—
—
—
IN+
Comparator Noninverting Input
—
3
3
3
INA+
Comparator A Noninverting Input
4
—
—
—
IN-
—
4
—
—
INA-
Comparator A Inverting Input
—
5
—
4
INB-
Comparator B Inverting Input
—
6
4
—
INB+
Comparator B Noninverting Input
5
—
5
5
HYST
Hysteresis Input. Connect HYST to REF if not used. Input voltage range
is from VREF to (VREF - 50mV).
6
—
6
6
REF
Internal Reference Output. Typically 1.235V with respect to GND.
7
7
7
7
VCC
Positive Supply Voltage, +1.6V to +5.5V
8
—
—
—
OUT
Comparator Open-Drain Output
—
8
8
8
OUTB
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Comparator Inverting Input
Comparator B Open-Drain Output
Maxim Integrated │ 6
MAX965–MAX970
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
Pin Descriptions (continued)
MAX969/MAX970
PIN
MAX969
MAX970
NAME
FUNCTION
SO
QSOP
1
1
1
OUTB
2
2
2
OUTA
Comparator A Open-Drain Output
3
3
3
VCC
Positive Supply Voltage, +1.6V to +5.5V
4
4
4
INA-
Comparator A Inverting Input
5
5
5
INA+
Comparator A Noninverting Input
6
6
6
INB-
Comparator B Inverting Input
7
7
7
INB+
Comparator B Noninverting Input
—
—
8, 9
N.C.
No Connection. Not internally connected.
8
—
—
REF
Internal Reference Output. Typically 1.235V with respect to GND.
9
—
—
HYST
Hysteresis Input. Connect to REF if not used. Input voltage range is from
(VREF - 50mV) to VREF.
10
8
10
INC-
Comparator C Inverting Input
11
9
11
INC+
Comparator C Noninverting Input
Comparator B Open-Drain Output
12
10
12
IND-
Comparator D Inverting Input
13
11
13
IND+
Comparator D Noninverting Input
14
12
14
GND
Ground
15
13
15
OUTD
Comparator D Open-Drain Output
16
14
16
OUTC
Comparator C Open-Drain Output
Detailed Description
The MAX965–MAX970 single/dual/quad, micropower,
ultra-low-voltage comparators feature rail-to-rail inputs
and outputs and an internal 1.235V ±1.5% bandgap
reference. These devices operate from a single +1.6V
to +5.5V supply voltage range, and consume less than
5µA supply current per comparator over the extended
temperature range. Internal hysteresis is programmable
up to ±50mV using two external resistors and the device’s
internal reference. The rail-to-rail input common-mode
voltage range and the open-drain outputs allow easy
voltage-level conversion for multivoltage systems. All
inputs and outputs can tolerate a continuous short-circuit
fault condition to either rail.
The MAX965 is a single comparator with adjustable
hysteresis and a reference output pin. The MAX966 is
a dual comparator without the reference and without
adjustable hysteresis. The MAX967 is a dual compara-
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tor configured as a dual voltage monitor with common
hysteresis adjustment and a reference output. The dual
MAX968 is similar to the MAX967, but is configured
as a window comparator. The MAX969 is a quad comparator with a common hysteresis adjustment and a
reference output pin. The MAX970 is a quad comparator
without a reference and without hysteresis adjustment.
(See Functional Diagrams and Selector Guide.)
Comparator Input
The MAX965–MAX970 have a -0.25V to VCC input
common-mode range. Both comparator inputs may operate at any differential voltage within the common-mode
voltage range, and the comparator displays the correct
output logic state.
Low-Voltage Operation: VCC Down to 1V
The minimum operating voltage is 1.6V. As the supply voltage falls below 1.6V, performance degrades
and supply current falls. The reference does not
Maxim Integrated │ 7
MAX965–MAX970
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
Functional Diagrams
VCC
IN+
VCC
OUTA
OUTB
MAX966
OUT
INHYST
REF
MAX965
+
1.235V REF
INB+
INA-
INBGND
GND
VCC
INA+
INA+
VCC
INA+
OUTA
OUTA
REF
REF
HYST
HYST
REF
REF
1.235V
1.235V
OUTB
INB+
GND
INB-
MAX967
VCC
OUTB
OUTA
OUTB
GND
OUTC
OUTB
OUTD
OUTA
VCC
MAX968
OUTC
OUTD
INA-
IND+
INA-
IND+
INA+
IND-
INA+
IND-
INB-
INC+
INB-
INC+
INB+
INC-
INB+
INC-
REF
+
1.235V REF
MAX969
GND
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HYST
MAX970
GND
Maxim Integrated │ 8
MAX965–MAX970
Single/Dual/Quad, Micropower,
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
function below about 1.5V, although the comparators
typically continue to operate with a supply voltage as low
as 1V. At low supply voltages (
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