MAX971, MAX972, MAX973, MAX974, MAX981, MAX982, MAX983, MAX984 Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators

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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).

Key Features

Applications/Uses

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)

	Battery-Powered Systems
	Level Translators
	Oscillator Circuits
	Threshold Detectors
	Window Comparators

Key Specifications: Comparators

Part Number

Number per Pkg.

Typ Prop. Delay (ns)

Input CMVR to Neg. Rail

Min. Total Supply (V)

Max. Total Supply (V)

Dual Supply Voltage (±V)

Max. Supply Current per Comp. (µA)

Input Voltage Range (V)

V_OS (max) (mV)

Logic Output

Price^**

MAX972

12000

Yes

2.5

1.25 to 5.5

1.6

V_EE to V_CC-1.3

Open Drain

$0.98 @ 1k

See All Comparators (83)

Key Specifications: Comparators + Reference

Part Number

Comps. per Pkg.

Threshold (V)

Number of Inputs / Thresholds (V)

Threshold Accuracy (%)

Internal Reference Accuracy (%)

Typ Prop. Delay (µs)

Dual Supply Voltage (±V)

Supply Voltage (min) (V)

Supply Voltage (max) (V)

Max. Total Supply Current (µA)

Comp. Inputs Available

Prog. Hyst.

V_OS (max) (mV)

Logic Output

Input Range (V)

Price^**

MAX971

1.182

1 / 1.182

1.85

1.25 to 5.5

2.5

3.2

Both

Yes

Open Drain

0 to -1.3

$1.50 @ 1k

MAX973

2 / 1.182

1.85

4.5

1 Inv. + 1 Noninv.

Yes

$1.95 @ 1k

MAX974

4 / 1.182

1.85

6.6

Both

$2.25 @ 1k

MAX981

1 / 1.182

2.85

3.2

Both

Yes

$0.98 @ 1k

MAX982

2 / 1.182

2.85

4.5

Noninv.

Yes

$1.26 @ 1k

MAX983

2 / 1.182

2.85

4.5

1 Inv. + 1 Noninv.

Yes

$1.26 @ 1k

MAX984

4 / 1.182

2.85

6.6

Both

$1.31 @ 1k

See All Comparators + Reference (42)

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.