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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX924 Datasheet

Single/Dual-Supply Comparators

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19-0115; Rev 6; 4/09
Ultra Low-Power,
Single/Dual-Supply Comparators
_______________General Description
The MAX921–MAX924 single, dual, and quad micro-
power, low-voltage comparators feature the lowest
power consumption available. These comparators draw
less than 4µA supply current over temperature
(MAX921/MAX922), and include an internal 1.182V
±1% voltage reference, programmable hysteresis, and
TTL/CMOS outputs that sink and source current.
Ideal for 3V or 5V single-supply applications, the
MAX921–MAX924 operate from a single +2.5V to +11V
supply (or a ±1.25V to ±5V dual supply), and each
comparator’s input voltage range swings from the
negative supply rail to within 1.3V of the positive
supply.
The MAX921–MAX924’s unique output stage con -
tinuously sources as much as 40mA. And by eliminating
power-supply glitches that commonly occur when com -
parators change logic states, the MAX921–MAX924
minimize parasitic feedback, which makes them easier to
use.
The single MAX921 and dual MAX923 provide a unique
and simple method for adding hysteresis without
feedback and complicated equations, simply by using
the HYST pin and two resistors.
MAX921
MAX922
MAX923
MAX924
Yes
No
Yes
Yes
1
Yes
8-Pin
DIP/SO/µMAX
2
No
8-Pin
DIP/SO/µMAX
2
Yes
8-Pin
DIP/SO/µMAX
4
No
16-Pin
DIP/SO/µMAX
________________________Applications
Battery-Powered Systems
Threshold Detectors
Window Comparators
Oscillator Circuits
µMAX is a registered trademark of Maxim Integrated Products, Inc.
____________________________Features
µMAX® Package—Smallest 8-Pin SO
(MAX921/MAX922/MAX923)
Ultra-Low 4µA Max Quiescent Current
Over Extended Temp. Range (MAX921)
Power Supplies:
Single +2.5V to +11V
Dual ±1.25V to ±5.5V
Input Voltage Range Includes Negative Supply
Internal 1.182V ±1% Bandgap Reference
Adjustable Hysteresis
TTL/CMOS-Compatible Outputs
12µs Propagation Delay (10mV Overdrive)
No Switching Crowbar Current
40mA Continuous Source Current
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX921CPA
0°C to +70°C
8 Plastic DIP
MAX921CSA
0°C to +70°C
8 SO
MAX921CUA
0°C to +70°C
8 µMAX
MAX921C/D
0°C to +70°C
Dice*
MAX921EPA
-40°C to +85°C
8 Plastic DIP
MAX921ESA
-40°C to +85°C
8 SO
MAX921MJA
-55°C to +125°C 8 CERDIP
Ordering Information continued at end of data sheet.
*Dice are tested at TA = +25°C, DC parameters only.
**Contact factory for availability.
__________Typical Operating Circuit
VIN
7
V+
3 IN+
4 IN-
OUT 8
5 HYST
6 REF
V-
2
MAX921
GND
1
THRESHOLD DETECTOR
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim 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

MAX924 Datasheet

Single/Dual-Supply Comparators

No Preview Available !

Ultra Low-Power,
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
Current, OUT_ .................................................................50mA
Voltage, REF ....................................(V+ + 0.3V) to (V- – 0.3V)
Voltage, OUT_ (MAX921/924) .....(V+ + 0.3V) to (GND – 0.3V)
Voltage OUT_ (MAX922/923)...........(V+ + 0.3V) to (V- – 0.3V)
OUT_ Short-Circuit Duration (V+ 5.5V) ...............Continuous
Continuous Power Dissipation (TA = +70°C)
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
8-Pin CERDIP (derate 8.00mW/°C above +70°C)........640mW
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)..842mW
16-Pin SO (derate 8.70mW/°C above +70°C) ................696mW
16-Pin CERDIP (derate 10.00mW/°C above +70°C)......800mW
Operating Temperature Ranges:
MAX92_C_ _ .......................................................0°C to +70°C
MAX92_E_ _.....................................................-40°C to +85°C
MAX92_MJ_ ..................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings‘” may cause permanent damage to the device. These are stress ratin gs only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS: 5V OPERATION
(V+ = 5V, V- = GND = 0V, TA = TMIN to TMAX, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN TYP MAX
POWER REQUIREMENTS
Supply Voltage Range
Supply Current
COMPARATOR
Input Offset Voltage
Input Leakage Current (IN-, IN+)
Input Leakage Current (HYST)
Input Common-Mode Voltage Range
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Voltage Noise
Hysteresis Input Voltage Range
Response Time
(Note 1)
2.5 11
TA = +25°C
MAX921,
HYST = REF
C/E temp. ranges
M temp. range
2.5 3.2
4
5
TA = +25°C
2.5 3.2
MAX922 C/E temp. ranges
4
IN+ = IN- + 100mV
MAX923,
HYST = REF
M temp. range
TA = +25°C
C/E temp. ranges
M temp. range
5
3.1 4.5
6
7.5
TA = +25°C
5.5 6.5
MAX924 C/E temp. ranges
8.5
M temp. range
11
VCM = 2.5V
IN+ = IN- = 2.5V
MAX921, MAX923
V- to (V+ – 1.3V)
V+ = 2.5V to 11V
100Hz to 100kHz
MAX921, MAX923
TA = +25°C, 100pF load
±10
C/E temp. ranges
±0.01
±5
M temp. range
±40
±0.02
V- V+ – 1.3
0.1 1.0
0.1 1.0
20
REF- 0.05V
REF
Overdrive = 10mV
12
Overdrive = 100mV
4
UNITS
V
µA
mV
nA
nA
V
mV/V
mV/V
µVRMS
V
µs
2 _______________________________________________________________________________________
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Part Number MAX924
Description Single/Dual-Supply Comparators
Maker Maxim
Total Page 17 Pages
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