MAX981:Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators

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
  • 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)
MAX971, MAX972, MAX973, MAX974, MAX981, MAX982, MAX983, MAX984: Typical Operating Circuit
MAX971, MAX972, MAX973, MAX974, MAX981, MAX982, MAX983, MAX984: Typical Operating Circuit
Applications/Uses
  • Battery-Powered Systems
  • Level Translators
  • Oscillator Circuits
  • Threshold Detectors
  • Window Comparators
DataSheet
titleDownload file
MAX971-MAX984 Data SheetMAX971-MAX984.pdf
Parametrics
Part NumberComp-
arators
tPD
(ns)
Input RangeVSUPPLY (Total)
(V)
VSUPPLY (Total)
(V)
ICC per Comp.
(µA)
VOS
(mV)
Logic OutOper. Temp.
(°C)
Package/PinsBudgetary
Price
typminmaxmaxmaxSee Notes
MAX972212000to Neg. Rail2.5111.610Open Drain-40 to +85
0 to +70
µMAX/8
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
UCSP/9
$1.68 @1k

Part NumberComp-
arators
Thresh.
(V)
Internal Ref. Accuracy
(%)
tPD
(µs)
VSUPPLY
(V)
VSUPPLY
(V)
ICC
(µA)
Prog. Hyst.VOS
(mV)
Logic OutOper. Temp.
(°C)
Package/PinsBudgetary
Price
typminmaxmaxmaxSee Notes
MAX97111.1821122.5113.2Yes10Open Drain-55 to +125
-40 to +85
0 to +70
µMAX/8
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$2.91 @1k
MAX973214.5Yes-55 to +125
-40 to +85
0 to +70
µMAX/8
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$3.00 @1k
MAX974416.6No-55 to +125
-40 to +85
0 to +70
PDIP(N)/16
SOIC(N)/16
$3.32 @1k
MAX981123.2Yes-40 to +85
0 to +70
µMAX/8
PDIP(N)/8
SOIC(N)/8
$2.20 @1k
MAX982224.5Yes-40 to +85
0 to +70
µMAX/8
PDIP(N)/8
SOIC(N)/8
$2.47 @1k
MAX983224.5Yes-40 to +85
0 to +70
µMAX/8
PDIP(N)/8
SOIC(N)/8
$2.48 @1k
MAX984426.6No-40 to +85
0 to +70
PDIP(N)/16
SOIC(N)/16
$2.79 @1k
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX981CPANo Longer AvailableMAX981CPA+PDIP(N),;8 pin;79.7 mm²0°C to +70°CNo
MAX981CPA+ActivePDIP(N),;8 pin;79.7 mm²0°C to +70°CLead Free
MAX981CSANo Longer AvailableMAX981CSA+SOIC(N),;8 pin;30.9 mm²0°C to +70°CNo
MAX981CSA+ActiveSOIC(N),;8 pin;30.9 mm²0°C to +70°CLead Free
MAX981CSA+TActiveSOIC(N),;8 pin;30.9 mm²0°C to +70°CLead Free
MAX981CSA-TNo Longer AvailableMAX981CSA+TN.SO;8 pin0°C to +70°CSee data sheet
MAX981CUANo Longer AvailableMAX981CUA+µMAX,;8 pin;15.6 mm²0°C to +70°CNo
MAX981CUA+ActiveµMAX,;8 pin;15.6 mm²0°C to +70°CLead Free
MAX981CUA+TActiveµMAX,;8 pin;15.6 mm²0°C to +70°CLead Free
MAX981CUA-TNo Longer AvailableMAX981CUA+TuMAX;8 pin0°C to +70°CSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX981EPANo Longer AvailableMAX981EPA+PDIP(N),;8 pin;79.7 mm²-40°C to +85°CNo
MAX981EPA+ActivePDIP(N),;8 pin;79.7 mm²-40°C to +85°CLead Free
MAX981ESANo Longer AvailableMAX981ESA+SOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
MAX981ESA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX981ESA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX981ESA-TNo Longer AvailableMAX981ESA+TN.SO;8 pin-40°C to +85°CSee data sheet
MAX971-MAX984.pdf MAX984
MAX981.pdf MAX981
MAX971-MAX984.pdf MAX984