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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX972 Datasheet

(MAX971 - MAX984) Single/Dual-Supply Comparators

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19-0450; Rev 3; 2/03
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
General Description
The MAX971–MAX974 and MAX981–MAX984 single/
dual/quad low-voltage comparators feature the lowest
power consumption available. These micropower
devices draw less than 4µA supply current over
temperature (MAX971/MAX972/MAX981/MAX982), and
include an internal 1.182V ±1% (MAX971/MAX973/
MAX974) or ±2% (MAX981–MAX984) 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 MAX971–MAX974 and MAX981–MAX984’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 MAX921–MAX924 (1% reference)
and the MAX931–MAX934 (2% reference).
MAX971
1%
1
Yes
8-Pin
DIP/SO/µMAX
MAX972 None
2
No
8-Pin UCSP/
DIP/SO/µMAX
MAX973
1%
2
Yes
8-Pin
DIP/SO/µMAX
MAX974
1%
4
No 16-Pin DIP/SO
MAX981
MAX982
MAX983
2%
2%
2%
1
Yes
8-Pin
DIP/SO/µMAX
2
Yes
8-Pin
DIP/SO/µMAX
2
Yes
8-Pin
DIP/SO/µMAX
MAX984
2%
4
No 16-Pin DIP/SO
Features
o Available in Ultra-Small Packages:
UCSP™ (MAX972)
µMAX (MAX9_1/MAX9_2/MAX9_3)
o Ultra-Low Quiescent Current (4µA, 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 12µs Propagation Delay (10mV Overdrive)
o Output Has Separate GND Pin (MAX9_1/MAX9_4)
Applications
Battery-Powered
Systems
Threshold Detectors
Window Comparators
Level Translators
Oscillator Circuits
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX971CPA
0°C to +70°C
8 Plastic Dip
MAX971CSA
0°C to +70°C
8 SO
MAX971CUA
0°C to +70°C
8 µMAX
Ordering Information continued at end of data sheet.
Typical Operating Circuit
VIN
7
V+
3 IN+
4 IN-
OUT 8
5 HYST
6 REF
V-
2
MAX971
MAX981
GND
1
THRESHOLD DETECTOR
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________________________________ 1
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.
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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX972 Datasheet

(MAX971 - MAX984) Single/Dual-Supply Comparators

No Preview Available !

Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
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
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 (TA = +70°C)
8-Bump UCSP (derate 4.7mW/°C above +70°C) ........379mW
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ...727mW
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
8-Pin µMAX (derate 4.1mW/°C above +70°C) .............330mW
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)..842mW
16-Pin SO (derate 8.70mW/°C above +70°C) ................696mW
Operating Temperature Ranges
MAX97_C_ _/MAX98_C_ _ ..................................0°C to +70°C
MAX97_E_ _/MAX98_E_ _ ...............................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Bump Temperature (soldering)
Reflow ..........................................................................+235°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 CHARACTERISTICS5V OPERATION
(V+ = 5V, V- = GND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
POWER REQUIREMENTS
Supply Voltage Range
(Note 2)
2.5 11 V
Output Voltage Range
Supply Current
IN+ = IN- +
100mV
MAX9_1,
HYST = REF
MAX972
MAX982/
MAX9_3,
HYST = REF
TA = +25°C
C/E temp ranges
TA = +25°C
C/E temp ranges
TA = +25°C
C/E temp ranges
0
11 V
2.5 3.2
4
2.5 3.2
4
3.1 4.5 µA
6
MAX9_4
TA = +25°C
C/E temp ranges
5.5 6.5
8.5
COMPARATOR
Input Offset Voltage
Input Leakage Current (IN-, IN+)
Input Leakage Current (HYST)
VCM = 2.5V
IN+ = IN- = 2.5V
MAX9_1/MAX982/MAX9_3
C/E temp ranges
±0.01
±0.02
±10
±5
mV
nA
nA
Input Common-Mode Voltage
Range
V-
V+ - 1.3
V
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
V- to (V+ - 1.3V)
V+ = 2.5V to 11V
0.1 1.0 mV/V
0.1 1.0 mV/V
Voltage Noise
Hysteresis Input Voltage Range
Response Time (High-to-Low
Transition)
Response Time (Low-to-High
Transition) (Note 3)
100Hz to 100kHz
MAX9_1/MAX982/MAX9_3
TA = +25°C, 100pF load,
1Mpullup to V+
Overdrive = 10mV
Overdrive = 100mV
TA = +25°C, 100pF load, 1Mpullup to V+
REF - 0.05
20
12
4
300
µVRMS
REF V
µs
µs
2 _______________________________________________________________________________________
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Part Number MAX972
Description (MAX971 - MAX984) Single/Dual-Supply Comparators
Maker Maxim
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MAX972 Datasheet PDF





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