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What is MAX971?

This electronic component, produced by the manufacturer "Maxim Integrated", performs the same function as "(MAX971 - MAX984) Single/Dual-Supply Comparators".


MAX971 Datasheet PDF - Maxim Integrated

Part Number MAX971
Description (MAX971 - MAX984) Single/Dual-Supply Comparators
Manufacturers Maxim Integrated 
Logo Maxim Integrated Logo 


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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.
Free Datasheet http://www.datasheet4u.com/

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MAX971 equivalent
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
__________________________________________Typical Operating Characteristics
(V+ = 5V, V- = GND = 0V, TA = +25°C, unless otherwise noted.)
OUTPUT VOLTAGE LOW
vs. LOAD CURRENT
2.5
V+ = 5V
2.0
V+ = 3V
1.5
1.190
1.185
1.180
1.175
REFERENCE OUTPUT VOLTAGE vs.
OUTPUT LOAD CURRENT
SINK
SOURCE
1.0 1.170
1.165
0.5
1.160
V+ = 5V
OR
V+ = 3V
0
0
1.155
4 8 12 16 20
0 5 10 15 20 25 30
LOAD CURRENT (mA)
OUTPUT LOAD CURRENT (µA)
MAX9_1
SUPPLY CURRENT vs.
TEMPERATURE
4.5
IN+ = IN- + 100mV
MAX972
SUPPLY CURRENT vs. TEMPERATURE
4.5
IN+ = (IN- + 100mV)
4.0 4.0
MAX971/MAX973/MAX974
REFERENCE VOLTAGE vs. TEMPERATURE
1.22
1.21
EXTENDED TEMP RANGE
1.20
1.19 COMMERCIAL
TEMP RANGE
1.18
1.17
1.16
1.15
1.14
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
MAX982/MAX9_3
SUPPLY CURRENT vs. TEMPERATURE
5.0
4.5
V+ = 5V, V- = - 5V
3.5
3.0
V+ = 3V, V- = 0V
2.5
2.0
-60
V+ = 5V, V- = 0V
-20 20 60 100
TEMPERATURE (°C)
140
3.5
V+ = 10V, V- = 0V
3.0
2.5
2.0
1.5
-60
V+ = 5V, V- = 0V
V+ = 3V, V- = 0V
-20 20 60 100
TEMPERATURE (°C)
140
4.0
V+ = 5V, V- = 0V
3.5
3.0
2.5
2.0
-60
V+ = 3V, V- = 0V
-20 20 60 100
TEMPERATURE (°C)
140
MAX9_4
SUPPLY CURRENT vs. TEMPERATURE
10
IN+ = (IN- + 100mV)
9
8
7
V+ = 5V, V- = -5V
6
5 V+ = 5V, V- = 0V
4 V+ = 3V, V- = 0V
3
-60
-20 20 60 100
TEMPERATURE (°C)
140
MAX9_4
SUPPLY CURRENT vs.
LOW SUPPLY VOLTAGES
10
1
0.1
0.01
1.0
1.5 2.0
SINGLE-SUPPLY VOLTAGE (V)
2.5
MAX9_1/MAX982/MAX9_3
HYSTERESIS CONTROL
80
60
OUTPUT HIGH
40
20
0 NO CHANGE
-20
-40
OUTPUT LOW
-60
-80
0
10 20 30 40
VREF - VHYST (mV)
50
_______________________________________________________________________________________ 5
Free Datasheet http://www.datasheet4u.com/


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