_______________General Description
The MAX931-MAX934 single, dual, and quad micropower,
low-voltage comparators plus an on-board 2% accurate
reference feature the lowest power consumption available.
These comparators draw less than 4A supply current
over temperature (MAX931), and include an internal
1.182V 2% voltage reference, programmable hysteresis,
and TTL/CMOS outputs that sink and source current.
Ideal for 3V or 5V single-supply applications, the
MAX931-MAX934 operate from a single +2.5V to +11V
supply (or a 1.25V to 5V dual supply), and each
comparator's input voltage range extends from the
negative supply rail to within 1.3V of the positive supply.
The MAX931-MAX934's unique output stage continuously
sources as much as 40mA. And by eliminating power-
supply glitches that commonly occur when comparators
change logic states, the MAX931-MAX934 minimize
parasitic feedback, which makes them easier to use.
The single MAX931 and dual MAX932/MAX933 provide a
unique and simple method for adding hysteresis without
feedback and complicated equations, using the HYST pin
and two resistors.
For applications that require increased precision with
similar power requirements, see the MAX921-MAX924 data
sheet. These devices include a 1% precision reference.
________________________Applications
Battery-Powered Systems
Threshold Detectors
Window Comparators
Oscillator Circuits
Alarm Circuits
____________________________Features
o
Ultra-Low 4A Max Quiescent Current
Over Extended Temp. Range (MAX931)
o
Power Supplies:
Single +2.5V to +11V
Dual 1.25V to 5.5V
o
Input Voltage Range Includes Negative Supply
o
Internal 1.182V 2% Bandgap Reference
o
Adjustable Hysteresis
o
TTL-/CMOS-Compatible Outputs
o
12s Propagation Delay (10mV Overdrive)
o
No Switching Crowbar Current
o
40mA Continuous Source Current
o
Available in Space-Saving MAX Package
MAX931-MAX934
Ultra Low-Power, Low-Cost
Comparators with 2% Reference
________________________________________________________________
Maxim Integrated Products
1
MAX931
OUT
V-
GND
V+
2
1
8
3
4
5
6
7
THRESHOLD DETECTOR
V
IN
IN+
IN-
HYST
REF
__________Typical Operating Circuit
19-0194; Rev 1; 2/97
8 SO
-40C to +85C
MAX931ESA
8 MAX
0C to +70C
MAX931CUA
8 SO
0C to +70C
MAX931CSA
8 Plastic DIP
0C to +70C
MAX931
CPA
PIN-PACKAGE
TEMP. RANGE
PART
16-Pin
DIP/SO
No
4
Yes
MAX934
8-Pin
DIP/SO/
MAX
Yes
2
Yes
MAX933
8-Pin
DIP/SO/
MAX
Yes
2
Yes
MAX932
8-Pin
DIP/SO/
MAX
Yes
1
Yes
MAX931
PACK-
AGE
INTERNAL
HYSTERESIS
COMPARATORS
PER
PACKAGE
INTERNAL
2%
REFERENCE
PART
Ordering Information continued on last page.
For similar devices guaranteed over the military temp. range, see
the MAX921-MAX924 data sheet. The MAX931, MAX933, and
MAX934 are pin-compatible with the 1% accurate MAX921,
MAX923, and MAX924, respectively. The MAX932 and
MAX922 are not pin-compatible.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
8 Plastic DIP
-40C to +85C
MAX931EPA
______________Ordering Information
MAX931-MAX934
Ultra Low-Power, Low-Cost
Comparators with 2% Reference
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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
Current, OUT_ .................................................................50mA
Voltage, REF ....................................(V+ + 0.3V) to (V- 0.3V)
Voltage, OUT_ (MAX931/934) .....(V+ + 0.3V) to (GND 0.3V)
Voltage, OUT_ (MAX932/933)..........(V+ + 0.3V) to (V- 0.3V)
OUT_ Short-Circuit Duration (V+
5.5V) ...............Continuous
Continuous Power Dissipation (T
A
= +70C)
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:
MAX93_C_ _ .......................................................0C to +70C
MAX93_E_ _.....................................................-40C to +85C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10sec) .............................+300C
ELECTRICAL CHARACTERISTICS--5V Operation
(V+ = 5V, V- = GND = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
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.
PARAMETER
MAX933,
HYST = REF
MIN TYP MAX
UNITS
MAX934
V
V-
V+ 1.3
MAX931,
HYST = REF
5.5
6.5
Supply Current
IN+ = IN- + 100mV
A
Supply Voltage Range
T
A
= +25C, 100pF load
2.5
11
V
MAX932,
HYST = REF
2.5
3.2
Input Offset Voltage
CONDITIONS
10
mV
T
A
= +25C
nA
Input Leakage Current (IN-, IN+)
(Note 1)
0.01
5
Input Leakage Current (HYST)
T
A
= +25C
0.02
nA
Input Common-Mode Voltage Range
V
CM
= 2.5V
Common-Mode Rejection Ratio
IN+ = IN- = 2.5V, C/E temp. ranges
MAX931, MAX932, MAX933
0.1
1.0
mV/V
Power-Supply Rejection Ratio
V- to (V+ 1.3V)
V+ = 2.5V to 11V
100Hz to 100kHz
0.1
1.0
mV/V
Voltage Noise
MAX931, MAX932, MAX933
Overdrive = 10mV
Overdrive = 100mV
20
V
RMS
Hysteresis Input Voltage Range
REF 0.05
REF
V
T
A
= +25C
12
s
Response Time
T
A
= +25C
4
3.1
4.5
3.1
4.5
C/E temp. ranges
4
C/E temp. ranges
6
C/E temp. ranges
6
C/E temp. ranges
8.5
POWER REQUIREMENTS
COMPARATOR
MAX931-MAX934
Ultra Low-Power, Low-Cost
Comparators with 2% Reference
_______________________________________________________________________________________
3
PARAMETER
Voltage Noise
C/E temp. ranges, I
OUT
= 17mA
MIN TYP MAX
UNITS
100Hz to 100kHz
100
V
RMS
CONDITIONS
V
Output High Voltage
V+ 0.4
V- + 0.4
V
15
25
A
Source Current
GND + 0.4
Output Low Voltage
A
X
8
15
Sink Current
1.158
1.182
1.206
V
Reference Voltage
ELECTRICAL CHARACTERISTICS--5V Operation (continued)
(V+ = 5V, V- = GND = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS--3V Operation
(V+ = 3V, V- = GND = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
MAX933,
HYST = REF
MIN TYP MAX
UNITS
MAX934
MAX931,
HYST = REF
5.2
6.2
Supply Current
IN+ = (IN- + 100mV)
IN+ = IN- = 1.5V, C/E temp. ranges
A
MAX932,
HYST = REF
2.4
3.0
Input Offset Voltage
CONDITIONS
10
mV
T
A
= +25C
0.01
1
nA
Input Leakage Current (IN-, IN+)
Input Leakage Current (HYST)
T
A
= +25C
0.02
nA
V
CM
= 1.5V
MAX931, MAX932, MAX933
T
A
= +25C
T
A
= +25C
3.4
4.3
3.4
4.3
Note 1:
MAX934 comparators work below 2.5V, see
Low-Voltage Operation section for more details.
C temp. range
E temp. range
1.147
1.217
T
A
= +25C
C/E temp. ranges
6
T
A
= +25C
C/E temp. ranges
4
C/E temp. ranges
3.8
C/E temp. ranges
5.8
5.8
C/E temp. ranges
C/E temp. ranges
8.0
C/E temp. ranges,
I
OUT
= 1.8mA
MAX932,
MAX933
MAX931,
MAX934
POWER REQUIREMENTS
COMPARATOR
REFERENCE
MAX931-MAX934
Ultra Low-Power, Low-Cost
Comparators with 2% Reference
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS--3V Operation (continued)
(V+ = 3V, V- = GND = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
Voltage Noise
C/E temp. ranges, I
OUT
= 10mA
MIN TYP MAX
UNITS
100Hz to 100kHz
100
V
RMS
Input Common-Mode Voltage Range
V
V-
V+ 1.3
C/E temp. ranges, I
OUT
= 0.8mA
T
A
= +25C, 100pF load
MAX931
CONDITIONS
Common-Mode Rejection Ratio
0.2
1
mV/V
Power-Supply Rejection Ratio
V- to (V+ 1.3V)
V+ = 2.5V to 11V
100Hz to 100kHz
0.1
1
mV/V
Voltage Noise
MAX931, MAX932, MAX933
Overdrive = 10mV
Overdrive = 100mV
20
V
RMS
Hysteresis Input Voltage Range
REF 0.05
REF
V
14
s
Response Time
5
V
Output High Voltage
V+ 0.4
V- + 0.4
V
15
25
A
Source Current
T
A
= +25C
GND + 0.4
Output Low Voltage
8
15
A
Sink Current
1.158
1.182
1.206
V
T
A
= +25C
Reference Voltage
C temp. range
E temp. range
1.147
1.217
C/E temp. ranges
C/E temp. ranges
6
4
MAX932,
MAX933
REFERENCE
MAX931-MAX934
Ultra Low-Power, Low-Cost
Comparators with 2% Reference
_______________________________________________________________________________________
5
1.22
1.14
-60
-20
60
140
REFERENCE VOLTAGE
vs. TEMPERATURE
1.16
1.20
MAX921/924-TOC4
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
2.0
-60
140
MAX931
SUPPLY CURRENT vs. TEMPERATURE
2.5
4.5
MAX921/924-TOC5
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
5.0
2.0
-60
140
MAX932
SUPPLY CURRENT vs. TEMPERATURE
2.5
4.5
MAX921/924-TOC6
TEMPERATURE (
C)
SUPPLY CURRENT (
A)
60
3.5
3.0
-20
20
100
4.0
V+ = 5V, V- = 0V
V+ = 3V, V- = 0V
IN+ = IN- +100mV
4.5
5.0
-60
140
MAX933
SUPPLY CURRENT vs. TEMPERATURE
2.0
4.0
MAX921/924-TOC7
TEMPERATURE (
C)
SUPPLY CURRENT (
A)
60
3.0
2.5
-20
20
100
3.5
V+ = 5V, V- = 0V
V+ = 3V, V- = 0V
IN+ = IN- +100mV
10
3
-60
140
MAX934
SUPPLY CURRENT vs. TEMPERATURE
4
8
MAX921/924-TOC8
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
MAX934
SUPPLY CURRENT vs.
LOW SUPPLY VOLTAGES
0.1
1
MAX921/924-TOC9
SINGLE-SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
A)
1.5
IN+ = IN- +100mV
__________________________________________Typical Operating Characteristics
(V+ = 5V, V- = GND, T
A
= +25C, unless otherwise noted.)
0.0
0
20
OUTPUT VOLTAGE LOW
vs. LOAD CURRENT
0.5
2.5
MAX921/4-TOC1
LOAD CURRENT (mA)
V
OL
(V)
12
1.5
1.0
4
8
16
2.0
V+ = 5V
V+ = 3V
1.5
0
10
30
50
OUTPUT VOLTAGE HIGH vs.
LOAD CURRENT
2.5
4.5
MAX921/924-TOC2
LOAD CURRENT (mA)
V
OH
(V)
20
40
3.5
5.0
2.0
4.0
3.0
V+ = 5V
V+ = 3V
1.155
0
5
15
25
REFERENCE OUTPUT VOLTAGE vs.
OUTPUT LOAD CURRENT
1.165
1.185
MAX921/924-TOC3
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
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