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MAX971, MAX972, MAX973, MAX974, MAX981, MAX982, MAX983, MAX984
Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
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Status
Active: In Production.
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).
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Data Sheet
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Key Features
- Available in Ultra-Small Packages:
- UCSP™ (MAX972)
- µMAX® (MAX9_1/MAX9_2/MAX9_3)
- Ultra-Low Quiescent Current (4µA, max)
Over Extended Temp Range (MAX971/MAX981)
- Power Supplies:
- Single 2.5V to 11V
- Dual ±1.25V to ±5.5V
- Input Voltage Range Includes Negative Supply
- Internal Bandgap Reference
- 1.182V ±1% (MAX97_)
- 1.182V ±2% (MAX98_)
- 12µs Propagation Delay (10mV Overdrive)
- Output Has Separate GND Pin (MAX9_1/MAX9_4)
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Applications/Uses
- Battery-Powered Systems
- Level Translators
- Oscillator Circuits
- Threshold Detectors
- Window Comparators
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Key Specifications:
| Comparators |
| Part Number |
Comp-
arators |
tPD
(ns) |
Input Range |
VSUPPLY (Total)
(V) |
VSUPPLY (Total)
(V) |
ICC per Comp.
(µA) |
VOS
(mV) |
Logic Out |
Oper. Temp.
(°C) |
Budgetary
Price |
| typ |
min |
max |
max |
max |
See Notes |
| MAX972 |
2 |
12000 |
to Neg. Rail |
2.5 |
11 |
1.6 |
10 |
Open Drain |
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$1.09 @1k |
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See All Comparators (84)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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| Comparators + Reference |
| Part Number |
Comp-
arators |
Thresh.
(V) |
Internal Ref. Accuracy
(%) |
tPD
(µs) |
VSUPPLY
(V) |
VSUPPLY
(V) |
ICC
(µA) |
Prog. Hyst. |
VOS
(mV) |
Logic Out |
Oper. Temp.
(°C) |
Budgetary
Price |
| typ |
min |
max |
max |
max |
See Notes |
| MAX971 |
1 |
1.182 |
1 |
12 |
2.5 |
11 |
3.2 |
Yes |
10 |
Open Drain |
| -55 to +125 | | -40 to +85 | | 0 to +70 |
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$1.75 @1k |
| MAX973 |
2 |
1 |
4.5 |
Yes |
| -55 to +125 | | -40 to +85 | | 0 to +70 |
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$2.16 @1k |
| MAX974 |
4 |
1 |
6.6 |
No |
| -55 to +125 | | -40 to +85 | | 0 to +70 |
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$2.50 @1k |
| MAX981 |
1 |
2 |
3.2 |
Yes |
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$1.09 @1k |
| MAX982 |
2 |
2 |
4.5 |
Yes |
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$1.40 @1k |
| MAX983 |
2 |
2 |
4.5 |
Yes |
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$1.40 @1k |
| MAX984 |
4 |
2 |
6.6 |
No |
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$1.44 @1k |
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See All Comparators + Reference (47)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
 Typical Operating Circuit
Notes and Comments
Micropower comparator + 1% reference and hysteresis, single supply capability, CMVR extends to GND (MAX971)
Dual, single-supply micropower comparator (MAX972)
Dual, single-supply comparator with 1% voltage reference (MAX973)
Quad, micropower comparator with 1% voltage reference (MAX974)
Low-cost comparator + 2% reference and hysteresis, single supply, CMVR extends to GND (MAX981)
Dual, low-cost, single-supply comparator + 2% reference and hysteresis (MAX982)
Dual, low-cost, single-supply comparator + 2% reference and hysteresis (window comparator input configuration)
(MAX983)
Quad, low-cost comparator + 2%-accurate reference, single/dual supply (MAX984)
More Information
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Information Index
Document Ref.: 19-0450
Rev 3;
2003-03-10
This page last modified: 2007-05-30
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