General Description
The MAX971MAX974 and MAX981MAX984 single/
dual/quad low-voltage comparators feature the lowest
power consumption available. These micropower
devices draw less than 4A supply current over
temperature (MAX971/MAX972/MAX981/MAX982), and
include an internal 1.182V 1% (MAX971/MAX973/
MAX974) or 2% (MAX981MAX984) voltage reference
and programmable hysteresis.
Ideal for 3V or 5V single-supply applications, these
devices operate from a single 2.5V to 11V supply (or
1.25V to 5.5V dual supplies), and each comparator's
input voltage ranges from the negative supply rail to within
1.3V of the positive supply.
The single MAX971/MAX981 and the dual MAX973/
MAX982/MAX983 provide a unique, simple method for
adding hysteresis without feedback or complicated
equations, simply by using the HYST pin plus two
resistors.
The MAX971MAX974 and MAX981MAX984's open-
drain outputs permit wire-ORed configurations. Thanks to
an 11V output range and separate GND pin for the output
transistor (MAX971/MAX974, MAX981/MAX984), these
devices are ideal for level translators and bipolar to single-
ended converters. For similar devices with complementary
output stages, see the MAX921MAX924 (1% reference)
and the MAX931MAX934 (2% reference).
Features
o Available in Ultra-Small Packages:
UCSPTM (MAX972)
MAX (MAX9_1/MAX9_2/MAX9_3)
o Ultra-Low Quiescent Current (4A, max)
Over Extended Temp Range (MAX971/MAX981)
o Power Supplies:
Single 2.5V to 11V
Dual 1.25V to 5.5V
o Input Voltage Range Includes Negative Supply
o Internal Bandgap Reference
1.182V 1% (MAX97_)
1.182V 2% (MAX98_)
o 12s Propagation Delay (10mV Overdrive)
o Output Has Separate GND Pin (MAX9_1/MAX9_4)
Applications
MAX971MAX974/MAX981MAX984
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
________________________________________________________________________________________ 1
MAX971
MAX981
OUT
IN+
HYST
REF
V-
GND
V+
2
1
4
5
6
8
3
7
IN-
THRESHOLD DETECTOR
V
IN
Typical Operating Circuit
19-0450; Rev 3; 2/03
Ordering Information continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
PART
INTERNAL
PRECISION
REFERENCE
INTERNAL
HYSTERESIS
PACKAGE
MAX971
1%
Yes
8-Pin
DIP/SO/MAX
MAX972
None
No
8-Pin UCSP/
DIP/SO/MAX
MAX973
1%
Yes
8-Pin
DIP/SO/MAX
MAX974
1%
No
16-Pin DIP/SO
MAX981
2%
Yes
8-Pin
DIP/SO/MAX
MAX982
2%
Yes
8-Pin
DIP/SO/MAX
MAX983
2%
Yes
8-Pin
DIP/SO/MAX
MAX984
2%
No
16-Pin DIP/SO
COMPARATORS
PER
PACKAGE
1
2
2
4
1
2
2
4
Ordering Information
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.
PART
TEMP RANGE
PIN-PACKAGE
MAX971CPA
0
C to +70C
8 Plastic Dip
MAX971CSA
0
C to +70C
8 SO
MAX971CUA
0
C to +70C
8 MAX
Battery-Powered
Systems
Threshold Detectors
Window Comparators
Level Translators
Oscillator Circuits
MAX971MAX974/MAX981MAX984
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
2
_______________________________________________________________________________________
V+ to V-, V+ to GND, GND to V-................................-0.3V, +12V
Inputs
Current: IN_+, IN_-, HYST..............................................20mA
Voltage: IN_+, IN_-, HYST ...............(V+ + 0.3V) to (V- - 0.3V)
Outputs
Current: REF...................................................................20mA
OUT_ ................................................................50mA
Voltage: REF ....................................(V+ + 0.3V) to (V- - 0.3V)
OUT_ (MAX9_1/9_4)..................12V to (GND - 0.3V)
(MAX9_2/9_3).......................12V to (V- - 0.3V)
OUT_ Short-Circuit Duration ..................................Continuous
Continuous Power Dissipation (T
A
= +70C)
8-Bump UCSP (derate 4.7mW/C above +70C) ........379mW
8-Pin Plastic DIP (derate 9.09mW/C above +70C) ...727mW
8-Pin SO (derate 5.88mW/C above +70C)................471mW
8-Pin MAX (derate 4.1mW/C above +70C) .............330mW
16-Pin Plastic DIP (derate 10.53mW/C above +70C)..842mW
16-Pin SO (derate 8.70mW/C above +70C) ................696mW
Operating Temperature Ranges
MAX97_C_ _/MAX98_C_ _ ..................................0C to +70C
MAX97_E_ _/MAX98_E_ _ ...............................-40C to +85C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10s) .................................+300C
Bump Temperature (soldering)
Reflow ..........................................................................+235C
ELECTRICAL CHARACTERISTICS--5V OPERATION
(V+ = 5V, V- = GND = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.) (Note 1)
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.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
POWER REQUIREMENTS
Supply Voltage Range
(Note 2)
2.5
11
V
Output Voltage Range
0
11
V
T
A
= +25C
2.5
3.2
MAX9_1,
HYST = REF
C/E temp ranges
4
T
A
= +25C
2.5
3.2
MAX972
C/E temp ranges
4
T
A
= +25C
3.1
4.5
MAX982/
MAX9_3,
HYST = REF
C/E temp ranges
6
T
A
= +25C
5.5
6.5
Supply Current
IN+ = IN- +
100mV
MAX9_4
C/E temp ranges
8.5
A
COMPARATOR
Input Offset Voltage
V
CM
= 2.5V
10
mV
Input Leakage Current (IN-, IN+)
IN+ = IN- = 2.5V
C/E temp ranges
0.01
5
nA
Input Leakage Current (HYST)
MAX9_1/MAX982/MAX9_3
0.02
nA
Input Common-Mode Voltage
Range
V-
V+ - 1.3
V
Common-Mode Rejection Ratio
V- to (V+ - 1.3V)
0.1
1.0
mV/V
Power-Supply Rejection Ratio
V+ = 2.5V to 11V
0.1
1.0
mV/V
Voltage Noise
100Hz to 100kHz
20
V
RMS
Hysteresis Input Voltage Range
MAX9_1/MAX982/MAX9_3
REF - 0.05
REF
V
Overdrive = 10mV
12
Response Time (High-to-Low
Transition)
T
A
= +25C, 100pF load,
1M
pullup to V+
Overdrive = 100mV
4
s
Response Time (Low-to-High
Transition) (Note 3)
T
A
= +25C, 100pF load, 1M
pullup to V+
300
s
MAX971MAX974/MAX981MAX984
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS--5V OPERATION (continued)
(V+ = 5V, V- = GND = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.) (Note 1)
ELECTRICAL CHARACTERISTICS--3V OPERATION
(V+ = 3V, V- = GND = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.) (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
MAX9_2/MAX9_3, I
OUT
= 1.8mA
V- + 0.4
Output Low Voltage
MAX9_1/MAX9_4, I
OUT
= 1.8mA
GND
+ 0.4
V
Output Leakage Current
V
OUT
= 11V
100
nA
REFERENCE (MAX9_1/MAX982/MAX9_3/MAX9_4 ONLY)
C temp range
1%
1.170
1.182
1.194
MAX971/MAX973/
MAX974
E temp range
2%
1.158
1.206
C temp range
2%
1.158
1.182
1.206
Reference Voltage
MAX981MAX984
E temp range
3%
1.147
1.217
V
T
A
= +25C
15
25
Source Current
C/E temp ranges
6
A
T
A
= +25C
8
15
Sink Current
C/E temp ranges
4
A
Voltage Noise
100Hz to 100kHz
100
V
RMS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
POWER REQUIREMENTS
T
A
= +25C
2.4
3.0
MAX9_1
C/E temp ranges
3.8
T
A
= +25C
2.4
3.0
MAX972
C/E temp ranges
3.8
T
A
= +25C
3.4
4.3
MAX982/
MAX9_3
C/E temp ranges
5.8
T
A
= +25C
5.2
6.2
Supply Current
HYST = REF,
IN+ = (IN- +
100mV)
MAX9_4
C/E temp ranges
8.0
A
COMPARATOR
Input Offset Voltage
V
CM
= 1.5V
10
mV
Input Leakage Current (IN-, IN+)
IN+ = IN- = 1.5V
C/E temp ranges
0.01
5
nA
Input Leakage Current (HYST)
MAX9_1/MAX982/MAX9_3
0.02
nA
Input Common-Mode Voltage
Range
V-
V+ - 1.3
V
Common-Mode Rejection Ratio
V- to (V+ - 1.3V)
0.2
1
mV/V
Power-Supply Rejection Ratio
V+ = 2.5V to 11V
0.1
1
mV/V
Voltage Noise
100Hz to 100kHz
20
V
RMS
Hysteresis Input Voltage Range
MAX9_1/MAX982/MAX9_3
REF - 0.05
REF
V
MAX971MAX974/MAX981MAX984
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS--3V OPERATION (continued)
(V+ = 3V, V- = GND = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.) (Note 1)
Note 1: The MAX972EBL is 100% tested at T
A
= +25C. Temperature limits are guaranteed by design.
Note 2: MAX974/MAX984 comparators work below 2.5V; see Low-Voltage Operation section for more details.
Note 3: Low-to-high response time is the result of the 1M
pullup and the 100pF capacitive load, based on three time constants.
A faster response time is achieved with a smaller RC.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Overdrive = 10mV
12
Response Time (High-to-Low
Transition)
T
A
= +25C, 100pF load,
1M
pullup to V+
Overdrive = 100mV
4
s
Response Time (Low-to-High
Transition) (Note 3)
T
A
= +25C, 100pF load, 1M
pullup to V+
300
s
MAX9_2/MAX9_3, I
OUT
= 0.8mA
V- + 0.4
Output Low Voltage
MAX9_1/MAX9_4, I
OUT
= 0.8mA
GND + 0.4
V
Output Leakage Current
V
OUT
= 11V
100
nA
REFERENCE
C temp range
1%
1.170
1.182
1.194
MAX971/MAX973/
MAX974
E temp range
2%
1.158
1.206
C temp range
2%
1.158
1.182
1.206
Reference Voltage
MAX981MAX984
E temp range
3%
1.147
1.217
V
T
A
= +25C
15
25
Source Current
C/E temp ranges
6
A
T
A
= +25C
8
15
Sink Current
C/E temp ranges
4
A
Voltage Noise
100Hz to 100kHz
100
V
RMS
MAX971MAX974/MAX981MAX984
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
_______________________________________________________________________________________
5
2.0
-60
140
MAX9_1
SUPPLY CURRENT vs.
TEMPERATURE
2.5
4.5
MAX971-4/981-4 TOC4
TEMPERATURE (
C)
SUPPLY CURRENT (
A)
60
3.5
3.0
-20
20
100
4.0
V+ = 5V, V- = - 5V
V+ = 3V, V- = 0V
V+ = 5V, V- = 0V
IN+ = IN- + 100mV
4.5
1.5
-60
140
MAX972
SUPPLY CURRENT vs. TEMPERATURE
2.0
4.0
MAX971-4/981-4 TOC5
TEMPERATURE (
C)
SUPPLY CURRENT (
A)
60
3.0
2.5
-20
20
100
3.5
IN+ = (IN- + 100mV)
V+ = 5V, V- = 0V
V+ = 3V, V- = 0V
V+ = 10V, V- = 0V
4.5
5.0
-60
140
MAX982/MAX9_3
SUPPLY CURRENT vs. TEMPERATURE
2.0
4.0
MAX971-4/981-4 TOC6
TEMPERATURE (
C)
SUPPLY CURRENT (
A)
60
3.0
2.5
-20
20
100
3.5
V+ = 5V, V- = 0V
V+ = 3V, V- = 0V
10
3
-60
140
MAX9_4
SUPPLY CURRENT vs. TEMPERATURE
4
8
MAX971-4/981-4
TOC7
TEMPERATURE (
C)
SUPPLY CURRENT (
A)
60
6
5
-20
20
100
7
9
IN+ = (IN- + 100mV)
V+ = 5V, V- = 0V
V+ = 3V, V- = 0V
V+ = 5V, V- = -5V
10
0.01
1.0
2.0
2.5
MAX9_4
SUPPLY CURRENT vs.
LOW SUPPLY VOLTAGES
0.1
1
MAX971-4/981-4 TOC8
SINGLE-SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
A)
1.5
80
-80
0
10
30
50
MAX9_1/MAX982/MAX9_3
HYSTERESIS CONTROL
-40
40
MAX971-4/981-4 TOC9
V
REF
- V
HYST
(mV)
IN+ - IN- (V)
20
40
0
60
-60
20
-20
NO CHANGE
OUTPUT LOW
OUTPUT HIGH
__________________________________________Typical Operating Characteristics
(V+ = 5V, V- = GND = 0V, T
A
= +25C, unless otherwise noted.)
0
0
20
OUTPUT VOLTAGE LOW
vs. LOAD CURRENT
0.5
2.5
MAX971-4/981-4-TOC1
LOAD CURRENT (mA)
V
OL
(V)
12
1.5
1.0
4
8
16
2.0
V+ = 5V
V+ = 3V
1.155
0
5
15
25
REFERENCE OUTPUT VOLTAGE vs.
OUTPUT LOAD CURRENT
1.165
1.185
MAX971-4/981-4 TOC2
OUTPUT LOAD CURRENT (
A)
REFERENCE OUTPUT VOLTAGE (V)
10
20
1.175
1.190
1.160
1.180
1.170
V+ = 5V
OR
V+ = 3V
30
SINK
SOURCE
1.22
1.14
-60
-20
60
140
MAX971/MAX973/MAX974
REFERENCE VOLTAGE vs. TEMPERATURE
1.16
1.20
MAX971-4/981-4 TOC3
TEMPERATURE (
C)
REFERENCE VOLTAGE (V)
20
100
1.18
1.21
1.15
1.19
1.17
-40
0
80
40
120
EXTENDED TEMP RANGE
COMMERCIAL
TEMP RANGE
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